High Quality Led Bluetooth Speaker
Page Index Updates Builders Response For Sale News, 23rd Dec 22
CLICK IMAGES TO GO TO CONSTRUCTION
Welcome to my website! Below you will find articles on some of the work
done over the last two decades. Building speakers has be on and off for
more than forty years since high school, and with the availability of PC-based measuring equipment
in the Nineties my hobby took another direction, as it became very much
clear, that doing crossovers by calculation and fine-tuning by ear had
its shortcomings.
Over the years my focus has moved from small and inefficient speakers to
larger constructions providing less distortion and increased dynamics,
things that
make reproduced music live and engaging. Below you will find speakers
ranging from 2 to 300 litres volume and I hope you will find inspiration
for your next DIY project or buy one of the kits from Jantzen Audio.
In case you want advice on which speaker to build, please read both "choices"
and "crossovers"
before writing. I shall not recommend any speaker for reasons outlined
in the "choices" file, and please do not ask about the sonic differences between
two speakers. What I hear is unlikely to be what you will hear.
Sorry, but time doesn't allow assisting
in any hypothetical combination of drivers of your own choice, nor
up-grade of newer commercial speakers as well as renovation of vintage speakers not listed below.
Should you run into problems with the constructions presented
here, I'll do all I can to assist in successful implementation.
Designing loudspeakers is not necessarily rocket science. Designing loudspeaker drivers is another thing, but picking 2-3 drivers and making a suitable cabinet and crossover is basically a matter of handling fairly simple measuring equipment, simulation software - and experience. Some call the voicing of speakers an art. I don't think so. Voicing a speakers is a matter of taste like adding spices to a stew. Some like it hot, creamy or crunchy - some don't. The ancient Greeks didn't distinguish between art and craftsmanship. Same thing. Something may be art if enough people think it is.
Since 2014, all schematics are closed, i.e. crossover components' values only comes with purchase of the kit. The reason for this can be read here. Crossover schematics cannot be bought alone.
All technical questions, contact: troels.gravesen@hotmail.com
For purchase of kits, contact:
contact@jantzen-audio.com
None of the constructions, illustrations or
information presented here may be used for commercial purposes and
cannot be licensed.
The constructions are divided into sections based on the main driver in
the system, e.g. ScanSpeak, SEAS, SBAcoustics, AudioTechnology and
Purifi.
I'm very
fortunate to be sponsored by these companies and without their generous
support, very little of this would have been possible. Unless
specifically stated, all constructions are based on my own preferences
and I may combine drivers from different manufacturers if I think they
will make good partners. Drivers from Faital, BMS and 18 SOUND are not
sponsored by the companies and are all out of my own pocket, but I
strongly feel quite a few products from the PA world are more than
suitable for hifi application.
All underlined text is a link, regardless of font properties.
Regarding frd and zrd files for crossover simulation: I do not provide these from my library and please do not send your own for evaluation.
The common habit of anonymity on discussion forums is sad, I think. Why should we spend time with nobody in cyberspace? You must be somebody. If you have questions or comments, please state your name and the country you live in to give me an idea of the hifi environment you live in. Feel sure I need your response to make this website better.
I have a lot of mails and answering takes time and please do not feel neglected if my reply is short. I regard all communication between you and me as personal, so do not post my comments or graphics on discussion forums, websites, etc. without my written consent.
ScanSpeak Constructions
FUSION SPEAKERS
Speakers combining various brands:
ScanSpeak, SBAcoustics,
AudioTechnology, Peerless, BMS, Faital, 18 SOUND, Purifi
SBAcoustics Speakers
SEAS Constructions
Constructions based on the 8008-HMQ high-efficiency driver
Center speakers
Illuminator-CENTER to come
Subwoofer and bass module
AudioTechnology Constructions
Up-Grade Kits for Vintage Speakers
Should I up-grade my vintage speakers? Read here.
Vintage speaker and high-efficiency stuff
My reference system
Click image or heading to go to:
PAGE INDEX
Recent up-dates
Builders' response
News
Speaker constructions featuring drivers
from:
ScanSpeak
SBAcoustics
SEAS
AudioTechnology
High Efficiency Speakers
FUSION
Mix of drivers from various manufacturers, ScanSpeak,
Purifi, Peerless, Faital,
BMS, 18 SOUND.
The Jenzen speakers, 3-way transmission
line designs
Up-Grade Kits: JBL L100, Tannoy MG15, YAMAHA NS1000M
Subwoofers
Center speakers for surround sound
HYPEX, PAGES on the use of Hypex FUSION plate-amp/DSP modules
Open baffle speakers
Vintage speakers, JBL Tannoy, Wharfedale, Goodmans, etc
Tests and revies
Feature articles, tips, ideas, cabinet damping, coils, etc.
Tips & Ideas
My system
Sponsors
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FOR SALE, CLICK HERE FOR FURTHER INFO
Nothing for the time being.
Back to Index
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Back
to Index
BOLD = new speaker constructions
22-12-2022:
Some Ellipticor/Christmas fun
26-11-2022:
Purifi-Be
15-11-2022:
FUSION-22, 3-way classic, 12" BMS bass driver, SBA
TX units
30-09-2022:
New Jantzen Audio MKT-Z capacitors for bass crossovers
28-09-2022:
ScanSpeak Revelator-851, now with Be dome option
27-09-2022:
Kit prices ready for SBA-7MD
27-08-2022:
SBAcoustics, SBA-7MD, 3-way transmission line
30-07-2022:
My second pair of Illuminator-71 and some hifi history
30-07-2022:
My workshop turntable
12-06-2022:
ScanSpeak Revelator-66
25-05-2022:
Room-gain, a case study
25-05-2022:
Revelator-851, revisisted
20-05-2022:
ScanSpeak Ellipticor-A50-II
20-05-2022:
ScanSpeak Ellipticor-A50
08-04-2022:
ScanSpeak Illuminator-CENTER
07-04-2022:
SEAS-CENTER-EXCEL
06-04-2022:
SEAS-CENTER-PRESTIGE, update.
17-03-2022:
ScanSpeak Discovery-81
20-02-2022:
ScanSpeak Revelator-851
13-01-2022:
Faital-3WC-10 update. Now with Be dome option
13-01-2022:
Passive to active: Convert a passive design to fully active
17-12-2021:
Purifi 6661 floorstander
10-11-2021:
SBAcoustics, SBA-861PFCR,
high-performance/low-cost floorstander
16-10-2021:
ScanSpeak Illuminator-71,
2-way stand-mount or floor-stander
01-10-2021:
Purifi-6R,
2-way stand-mount from Purifi and Viawave drivers.
03-09-2021:
ScanSpeak Illuminator-7751,
successor of popular Ekta Grande
28-07-2021:
Faital 3WC-10
04-04-2021:
Inverted polarity, what is it? I'm afraid we need to spend a little time
here.
23-03-2021:
ScanSpeak Discovery MTM
25-02-2021:
ScanSpeak Discovery 3WC mkII
20-01-2021:
New SEAS W12CY006 midrange driver for CNO-GRANDE and CENTER-641
31-12-2020:
The Loudspeaker-III
17-12-2020:
SEAS CNO-4, with new W18NX003 midbass
17-12-2020:
New SEAS W18NX003 midbass driver, intro
07-11-2020:
ScanSpeak Discovery-CENTER
24-10-2020:
ScanSpeak Discovery-861, 2½-way floorstander
03-10-2020:
Use a Hypex FA251 or FA501 as a power amp for bi-amping
11-08-2020:
Page with links to all Hypex files
07-08-2020:
Thöress EHT Integrated amplifier. Can you handle the truth?
04-08-2020:
Faital 3WC-15, 15" version of the Faital 3WC
19-07-2020:
TEST: 6" and 8" midrange drivers
19-07-2020:
TEST:
Purifi PTT6.5-W04 6" midbass driver
19-07-2020:
TEST: Viawave GRT-145W-8, ribbon tweeter with waveguide
08-06-2020:
Test Audio Technica ART1000 cartridge
04-06-2020:
Cabinets for the Faital 3WC available from EBEL Holztechnik
10-04-2020:
Edge-coating of drivers
04-03-2020:
Update to Ellipticor-3 speaker. Hypex FA501 plate-amp/DSP, high-level
input
27-02-2020:
Kit prices ready for The Loudspeaker -2
16-02-2020:
Testing ScanSpeak D2104/712000 3/4" dome tweeter
13-02-2020:
The Loudspeaker-2
13-02-2020:
More Faital 3WC stuff, Beryllium version
26-12-2019:
Faital 3-Way Classic, 93 dB sensitivity, stunning dynamics
08-12-2019:
ScanSpeak Ekta-25, 2½-way, 18W/8542-10/D2608/913000
19-11-2019:
ScanSpeak Ekta 2D, digital 2-way
15-10-2019:
Up-date on Hypex FA251 and FA501 for
FUSION-BAD and
MUN-17 speakers
29-08-2019:
SEAS CNO-GRANDE
08-08-2019:
Edge-coating and linear distortion, prelude to CNO-GRANDE construction
08-08-2019:
New copper foils caps, AMBER-Z, from Jantzen Audio, review
28-07-2019:
SEAS CNO-25-mkII, new crossover and time-aligned drivers
26-07-2019:
SEAS CNO-mkIII,
update to a popular construction
03-06-2019:
Bass module for SBA-741 and other smaller 5-6"+1" stand-mounts
23-05-2019:
Müll oder gut für ein Schlechtwetterprojekt? Vintage Isophon P25A.
18-05-2019:
SBAcoustics SBA-741
09-05-2019:
ScanSpeak Studio 101 mkII
09-05-2019:
ScanSpeak 32W/4878T11 for Ellipticor-3 now ready for sale
06-05-2019:
High-pass filter for power amps
11-03-2019:
SBAcoustics, SBA-761, floor-stander, 1st order filter
05-01-2019:
Loudspeaker Modelling by Geoff Hill
View all updates
GO
TO BUILDERS' RESPONSE PAGE
Back to top Back to Index
19-12-2022:
The Loudspeaker-3, built by Christopher
15-10-2022:
Faital-3WC-10, built by Tim, USA
14-12-2022:
Faital-3WC-10, built by Richard, Amsterdam
12-12-2022:
TQWT-mkIII, built by Predrag, Slovenija
06-12-2022:
ScanSpeak Jensen-1071, built by Jaroslaw, Poland
05-12-2022:
ScanSpeak Discovery-3WC-mkII, built by Decher
05-12-2022:
ScanSpeak Discovery 18W, built by Jan, Slovakia
25-11-2022.
SEAS CA18RLY/22TAF-G, built by Alex, Ukraine
24-11-2022:
SBAcoustics, SBA-MTM, built by Allan, Denmark
21-11-2022:
FUSION-BAD, built Petr
29-10-2022:
ScanSpeak Ekta mkII, built by Marshall
28-10-2022:
Faital-3WC-10 and -15 built by Koenraad, Belgium
22-10-2022:
ScanSpeak Discovery-861, built by Joel, Denmark
21-10-2022:
Further comments from PieterJan on his The Loudspeaker-1
20-10-2022:
Faital-3WC-10, built by Ole, Norway
12-10-2022:
SEAS CNO-4, built by Lars, Sweden
05-10-2022:
ScanSpeak Discovery-81, built by Dave
02-10-2022:
ScanSpeak, Ekta-25, built by Dan
02-20-2022:
The Loudspeaker-2, built by Noam
30-09-2022:
SBAcoustics, SBA-16-MTM, built by Marcel (pdf file)
28-09-2022:
DTQWT-mkII, built by Luc, Canada
28-09-2022:
Faital-3WC-10, built by Przem
16-09-2022:
Faital-3WC-10, built by Lars, Sweden
14-09-2022:
SEAS Jenzen-ER, built by Sandro, Chile
06-09-2022:
Faital-3WC-10, built by Jarkko
03-09-2022:
ScanSpeak Discovery-CENTER, built by Chadd
16-08-2022:
Faital-3WC-10, built by Walter
16-08-2022:
ScanSpeak Ellam-Discovery-15, built by Gaetan, Canada
13-08-2022:
SBAcoustics, SBA-861-PFCR, built by JD
12-08-2022:
Faital-3WC-10, built by Joe
06-08-2022:
SBAcoustics, SBA-16-MTM, built by Berat, Denmark
01-08-2022:
SEAS CNO-GRANDE, built by Jay
29-07-2022:
Vifa PL14 projects, built by Steve, Australia
20-07-2022:
ScanSpeak Ekta mkII, built by Michael, Italy (concrete cabinets!)
06-07-2022:
Faital-3WC-10, built by Riccardo
02-07-2022:
The Loudspeaker-2, built by Philipp
29-06-2022:
SBAcoustics, SBA-761, built by John
26-06-2022:
ScanSpeak Ekta-25, built by Chris
26-06-2022:
The Loudspeaker-3, built by Wei
19-06-2022:
Faital-3WC-10, built by Bruno, Italy
14-06-2022:
SEAS CENTER-641-NEXT, built by Petri, Finland
04-06-2022:
Peerless NOMEX-164-mkII, built by Paul, Canada
29-05-2022:
Open-baffle: OBL-15, built by Andrea
25-05-2022:
Purifi-6R, built by Bran
18-05-2022:
ScanSpeak Discovery-18W, built by Attilio and Moreno
17-05-2022:
ScanSpeak Illuminator-MONITOR, built by Malik
15-05-2022:
ScanSpeak Discovery-861, built by Alberto, Italy
02-05-2022:
ScanSpeak Discovery-861, built by David, Spain
22-04-2022:
SBAcoustics, SBA-861-PFCR, built by Sebastian, Sweden
16-04-2022:
The Loudspeaker-3, built by Dominic
14-04-2022:
TQWT-mkIII, built by Pablo, Argentina
13-04-2022:
ScanSpeak Discovery-861, built by Leo
13-04-2022:
ScanSpeak Discovery-861, built by Greg, US
10-04-2022:
Illuminator-71, built by Tommy, US
10-04-2022:
Faital-3WC-10, built by Christian, Italy
06-04-2022:
ScanSpeak Revelator-4R, built by Jody, US
04-04-2022:
Faital-3WC-12, built by Itsik
26-03-2022:
Faital-3WC-10, built by Marian, Romania
23-03-2022:
SBAcoustics, SBA-861-PFCR, built by Mircea
16-03-2022:
ScanSpeak Discovery 3WC-mkII, built by Timo, Finland
10-03-2022:
ScanSpeak 10" subwoofer, built by Jason
09-03-2022:
SEAS,
Poor Man's Strad, built by JC
06-03-2022:
Faital-3WC-10, built by Marko, Croatia
03-03-2022:
Faital-3WC-15, built by Peter, The Netherlands
01-03-2022:
DTQWT-mkIII, built by Simas, Lithuania
27-02-2022:
The Loudspeaker-3, built by Dominique, France
26-02-2022:
ScanSpeak Illuminator-Monitor, built by Thomas, US
23-02-2022:
SEAS Jenzen NEXT, update on build by CC Li, Hong Kong
22-02-2022:
Purifi-6R, built by Roberto
15-02-2022:
Faital-3WC-15, built by Bartlomiej, Poland
18-01-2022:
ScanSpeak Illuminator-7751, built by Mike
18-01-2022:
TQWT-mkIII, built by Jose, Spain
14-01-2022:
SEAS Jenzen-NEXT, built by Dieter
11-01-2022:
ScanSpeak Illuminator-7751, built by Goran
06-01-2022:
Faital-3WC-10, built by Reto
04-01-2022:
Faital-3WC-15, built by Stephan
01-01-2022:
Purifi-6R, built by Paul
Go to
all builders' response 2008-2021, chronologically
Back to Index
HES, High-Efficiency Speaker Constructions
Read feedback from HES builders here.
Some thoughts here on high-efficiency speakers:
http://www.troelsgravesen.dk/HES.htm
Intro to range of high-efficiency speakers:
http://www.troelsgravesen.dk/HESintro.htm
The Loudspeaker-I
The Loudspeaker-II
The Loudspeaker-III
Faital 3WC-10
Faital 3WC-12
Faital 3WC-15
Speakers based on the JA8008-HMQ high-efficiency driver
JA8008-HMQ driver, the heart of the HES speakers below
TQWT/DTQWT-mkIII, JA8008-HMQ - SEAS T35C002/waveguide
DTQWT 212 mkIII,
JA8008-HMQ+T35C002/waveguide + 2 x Eminence Deltalite II 2512
8008-CENTER mkII, for
the complete 8008 surround set, built around JA8008-HMQ/T35C002 drivers
QUATTRO mKII, 2-way
monitor/standmount from JA8008-HMQ/T35C002 drivers
TQWT/DTQWT mkIII FLAT, for those who want to upgrade the mkI/II speakers
8008-CORNER, speaker for near-wall placement
2016 OBL-15, the successor of OBL-11, now with the new JA8008-HMQ driver
Read here about the MKII versions and some background that may
not be included in the mkIII articles:
TQWT mkII: 2-way
tapered quarter-wave design, JA8008+TW034/waveguide
DTQWT mkII:
3-way double tapered quarter-wave design, JA8008+TW034/waveguide + 2 x
Eminence Deltalite II 2510
JA8008 used in open baffle constructions:
OBL-15, the successor of OBL-11, now with the new JA8008-HMQ driver
OBL-11,
Open Baffle Loudspeaker. My homage to Gilbert A. Briggs' SFB
OB-09, open baffle
construction, JA8008/TW034 and Eminence Deltalite II 2515, 15" bass
driver
OB-07 open
baffle experiments, Supravox 215RTF + JBL LE26/waveguide + Goodmans
Axiom 150 mkII
Background experiments:
Tweaking the
DTQWT, incl. intro to TQWT-mkII and DTQWT-mkII
DTQWT
experiments, JBL LE26/waveguide + Goodmans Axiom 150 mkII, Supravox
215RTF
Amplifiers:
Amplifiers
for TQWT and DTQWT; some general thoughts on suitable amplifiers
DTQWT, 10 or 12
inch. Which should I build?
Back to Index
Scan-Speak Constructions
Click heading or image to go to ScanSpeak constructions' overview
3- to 5-way constructions
Ellipticor-A50-II
Ellipticor-A50
Revelator-851
Illuminator-7751
Ellipticor-3
Ellipticor-4
Ekta mkII
ATELL-3, ScanSpeak/AudioTechnology/Viawave
Discontinued until further.
Illuminator-4
Illuminator-5
DISCOVERY-4
Jenzen
Illuminator, 3-way TL, W26/8861T00, 18WU/8741-T00
and D3004/660000
Ekta Grande,
18W/8531-G00 + 12M/4631-00 + R2904/7000 or R2604/832000
Jensen 1071, 3-way,
26W/8861T00 + 18W/8531-G00 + D2905/9900
Ellam FLEX 3W,
3-way from 22W/4851T00, 15W8530K00, D3004/660000, R3004/662000
Classic 3-ways stand-mount
ScanSpeak Discovery 3WC mkII, 22W/8534G00 + 15W/8434-G00 + D2608/913000
2-way floorstanders
ScanSpeak Discovery MTM
Bookshelf speakers
BOOKSHELF-3WC, 22W/8534-G00 + 12W/8524-G00 + D2608/913000
ScanSpeak Center Speakers
ScanSpeak Illuminator-CENTER
ScanSpeak Discovery-CENTER,
2x18W/8434-G00 + 12W/4524-G00 + D2608/913000
2-way stand-mount
Revelator-66, D3004/660000 + 18W/4531G01
Illuminator-71, 18WU/4741T00 + D3004/660000 or R3004/662000
Discovery-81, D2608/913000 + 22W/4534G00
Studio 101 mkII, 18W/8542-10 and D2608/913000
Revelator 4R, mini from 15W/4531G00 and R2604/832000
Ellipticor-One, 18WE/4542T00 + D3404/552000
Discovery 18W,
18W/8434G00 + R2604/832000
Minis
Ellam-9800 mkII.
My reference small 2-way
Ellam
FLEX, 15W/8530K00 and two tweeter options
Other ScanSpeak stuff
Testing D3004/660000 vs D2608/913000.htm
Testing ScanSpeak D2104/712000 3/4" dome tweeter
ScanSpeak Micro.
5F/8422T01, the smallest speaker I've ever made
Test Scan-Speak
5F/8422T01 and 10F/8414G10 full range mini drivers
Test of
ScanSpeak tweeters, D3004/660000 and D2904/710003, D3004/6640 Beryllium
dome and D2908/7140 Beryllium dome
Waveguide for
ScanSpeak D2904/710003 tweeter
ScanSpeak waveguides
Discontinued (Jantzen Audio does not support these kits any more
and you have to source components locally)
Illumina-66,
18WU/4741T00 and D3004/660000 or
R3004/662000
ScanSpeak Ekta-2D,
fully digital 2-way with Hypex FA122
Illuminator
Monitor, 18WU/8741T00 and D2904/710003
MUN17-3W, 28W/4878T00 + 18M/8631T00 + D2908/714000
DISCOVERY 12W,
built a small high-quality 4 litre mini
Compact Studio Monitor,
18W/8545-K00 + R2604/832000
Ellam
Discovery 15
ScanSpeak 3W-Classic - Classic, 21W/8550-00-13M/8640-00-R2604/833000
ScanSpeak 3W-Classic - Classic, 21W/8550-00-Eton
4-300-25Hex, R2604/833000
ScanSpeak 3W-Classic - Classic, 21W/8550-00-Vifa
PL11WH09-08-R2604/833000
SP44, 3-way,
18W/8530-G00 + Accuton C44 + Hiquphon OWI
SP38/13, 18W/8531-G00 +
D3806/8200 + D2010/8513
STUDIO 101,
18W/8542-00 and SEAS 27TFFC tweeter
Back to Index
FUSION speakers, mix of drivers from various manufacturers:
FUSION
(BMS, ScanSpeak/SBAcoustics)
FUSION-BAD (BMS, ScanSpeak/SBAcoustics)
FUSION-3 (BMS, ScanSpeak/SBAcoustics)
Faital 3WC-10 (Faital, ScanSpeak)
Faital 3WC-12 (Faital/ScanSpeak/SBAcoustics)
Faital 3WC-15 (Faital/18 SOUND/SBAcoustics)
The Loudspeaker I
(BMS/18 SOUND/various super-tweeters)
The Loudspeaker II (BMS/18 SOUND/various super-tweeters)
The Loudspeaker III (18 SOUND bass and horn and
Faital midrange)
Purifi-Be (Purifi/SBAcoustics)
Purifi-6661 (Purifi/SBAcoustics)
Purifi-6R (Purifi/Viawave)
Discontinued due to unavailability of ribbon tweeter
ATELL-3 (Viawave/ScanSpeak/AudioTechnology)
Discontinued until further.
ATS-4
HE (ScanSpeak/AudioTechnology/BMS)
Ellipticor-4 (ScanSpeak/18 SOUND/BMS)
Jenzen Accu (Accuton/AudioTechnology)
Jenzen ATS (AudioTechnology/ScanSpeak)
Peerless NOMEX-164
(Peerless/ScanSpeak)
SEAS
Constructions
Click
heading or image to go to SEAS constructions' overview.
Back to Index
4-WAY CONSTRUCTIONS
SEAS
CNO-4, with new W18NX003 midbass
SEAS NEXT4
speaker construction
3-WAY CONSTRUCTIONS
CNO-GRANDE, 2 x W18NX001 + W12CY003-EC + T29CF002
Jenzen SEAS NEXT
T25 and -T29. The luxury versions of Jenzen SEAS ER
Jenzen SEAS ER, high-end sound from budget drivers
Poor
Man's Strad, CA22RNX+MCA15RCY+T27TFFC
3-Way-Classic-mkII, CA22RNY+MCA12RC+27TFFC
CENTER SPEAKERS
SEAS-CENTER-EXCEL
SEAS-CENTER-PRESTIGE
2½-WAY CONSTRUCTIONS 20-35 LITER
SEAS CNO-25-mkII, 2 x W18NX001+T29CF002
2-WAY CONSTRUCTIONS
CNO-mkIII, W18NX001 + T29CF002
MINIS
SEAS CURV, mini two-way from SEAS U16/RCY/P and SEAS 29 TFF/W
DISCONTINUED (Jantzen Audio does not support these kits any more
and you have to source components locally)
Acapella NEXT,
W22NY001+W18NX001+T29CF001
SEAS 5INCH minis,
CA15RLY, W15CY001, W15LY001, 22 TAF/G
CA18RLY/22TAF-G COMPACT
W15CY001 + Hiquphon OWI
Scoperta, mini
TLs, W15LY001 and ScanSpeak D2608/913000
MAYA,
CA18RNX+T25C003
CA18RNX, 2½-way floorstander, 2 x CA18RNX + 27TDC
Eekels' minis,
W12CY003+22TAF/G
Acapella SEas,
W22EX001+W18EX001+T25C003
TJL3W,
W18E001+W12CY001+HIQUPHON OWI download
TJL3W, large
graphics, zip file
Poor Man's
Strad-EXCEL, W22EX001+W15CY001+27TFFC
W15CY001 + NeoCD3
TJL2W, W18E001 +
T25CF001
T14RCY+SS/8513 or Hiquphon OWI
SEAS W17EX001/SS-8513
W11XT, W11CY001
Acapella SE (single pdf file)
Acapella LWJ, Acapella SE and Acapella SEas constructions (pdf)
download
Acapella SE drawings, zip file
Point75i, SEAS
L22RN4X-P + W15CY001 + Expolinear NDRL81
Point75A&B, ScanSpeak 18W/8535+SEAS W15CY001 + Expolinear NDRL81/alt.
NEO3PDR (pdf)
Back to Index
The Jenzen Speakers
What are the
Jenzen speakers? Read here about the rationales behind the speakers
Also check out how a range of 6" drivers perform on the Jenzen front
panel
Jenzen
Illuminator, 3-way TL design from ScanSpeak W26/8861T00, 18WU/8741-T00
and D3004/660000
Jenzen NEXT,
3-way TL from SEAS W26FX002, W18NX001 and T25C003/T29CF002
Jenzen SEAS
ER, 3-way TL design from SEAS CA26RFX, ER18RNX and T25CF001
Jenzen speakers no longer supported by Jantzen Audio.
Jenzen ATS,
AudioTechnology 10C77/18H52 and ScanSpeak Be dome
Jenzen Accu
mkII, 3 way TL from Audio Technology 10C77-25-10-KAP, Accuton
C173-6-191E and Accuton C30-06-024
Jenzen D mkII, 3 way
TL from Audio Technology 10C77-25-10-KAP, Accuton C173-6-191E and
Jantzen Audio diamond JDT1024
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CENTER
SPEAKERS FOR SURROUND SOUND
ScanSpeak Illuminator-CENTER
ScanSpeak DISCOVERY-CENTER
SEAS-CENTER-PRESTIGE
SEAS-CENTER-EXCEL
8008-CENTER mkII, for the complete
8008 surround set, built around JA8008-HMQ/SEAS T35C002
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AudioTechnology Constructions
Click heading or image to go to Audio
Technology constructions' overview
ATS4-HE, high-efficiency version of ATS-4. Active DSP
bass section
ATS-4,
AudioTechnology, ScanSpeak and Jantzen Audio
AudioTechnology 3-Way Classic
Jenzen ATS. 10C77
bass, special 18H52 mid and ScanSpeak Be dome
AT-SW, 18H52 midbass and SWANS planar tweeter
ATELL-3, ScanSpeak/AudioTechnology/Viawave Discontinued until further.
ATiRi, two-way stand-mount Discontinued until further.
PRELUDE, 10C77, 15H52 mid, ScanSpeak 9900 tweeter Discontinued at Jantzen Audio
Test:
AudioTechnology 10C77
sandwich cone bass driver. Pre-study for new 3-W project
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Open baffle constructions
OBL-15, the successor of OBL-11, now with the new JA8008-HMQ driver
OBL-11, Open Baffle Loudspeaker. My homage to Gilbert A. Briggs' SFB,
discontinued.
OBL-9, 2009 open baffle
construction with JA8008/TW034 and Eminence Deltalite II 2515, 15" bass
driver, discontinued.
OBL-7, Goodmans
Axiom 150 mkII + Supravox 215RTF64 + LE26 dipole panel, OBL
experiments.
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Subwoofers
ScanSpeak
subwoofer 26W/4558T00-26W/0-00-00, 30W/4558T00-30W/0-00-00 and Hypex FA251/FA501
Hypex FUSION pages for the various constructions
where Hypex
plate-amp/DSP
modules are used.
Go to page with all Hypex files here (except Ekta 2D)
All Hypex related pages (for my own recollection):
Use a Hypex FA251 or FA501 as a power amp for bi-amping
http://www.troelsgravesen.dk/The-Loudspeaker-III.htm
http://www.troelsgravesen.dk/FUSION-BI-AMP-DSP.htm
http://www.troelsgravesen.dk/FUSION-3.htm
http://www.troelsgravesen.dk/ALL-FILES.htm
http://www.troelsgravesen.dk/TL-2_FA501.htm
http://www.troelsgravesen.dk/FUSION_FA251.htm
http://www.troelsgravesen.dk/Hypex-bi-amp.htm
http://www.troelsgravesen.dk/Hypex-FUSION_FA252.htm
http://www.troelsgravesen.dk/ATS4-HE_Ill-4_FA252.htm
http://www.troelsgravesen.dk/FUSION-FA122.htm
http://www.troelsgravesen.dk/Hypex-PSC2.400.htm
(Module no longer available)
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Up-Grade Kits For Vintage Speakers
JBL L100 Century
JBL L112
YAMAHA NS1000M
Tannoy MG15
B&W 802s3, better crossover components and wiring
Should I up-grade my vintage speakers? Read here.
Discontinued as kits from Jantzen Audio, source components locally.
JBL-L26
JBL L36
Dali800 renovation, new tweeter and crossover
Chario Academy Sonnet speaker
Find
feedback to kits here
Vintage Loudspeakers
Click heading or
image to go to vintage intro
Back to Index
JBL, James B. Lancing
JBL
L112 Up-Grade Kit
JBL L100 Century
Up-Grade Kit
JBL L100
Recreation, new aperiodic cabinet
Read L100
upgraders' response to kit
JBL LE20 and LE25
tweeters
JBL
LE26 tweeters
JBL
L26
JBL
L26-3way
TANNOY
Part 1: Tannoy 15"
MG
Part
2: Tannoy MG15 Upgrade Filter
Part 3: Tannoy
MG15 Crossover Problem
YAMAHA
YAMAHA NS1000M UP-GRADE KIT
WHARFEDALE
Mail exchange with former Wharfedale employee
Wharfedale
1962 brochures
Wharfedale SFB, pics and comments from owners
Wharfedale
Super 8 RS/DD
Wharfedale Super 3 tweeters
Wharfedale Super 8/FS-AL & North England M8, only pics
Vifa
None of the midbass
drivers here available, nor any replacements!
PL14WJ-09-08/ScanSpeak R2604/832000, 2-way 11.5 liter bookshelf mini, or 25 liter
d'Appolito, can be used for center speaker
C17WH d'Appolito: C17-I,
C17-II,
C17-III,
C17-mk4. C17
drivers very hard to find
C20WH-07-08 + Monacor
DT300/waveguide. C20 drivers very hard to find
High Efficiency
Speakers and vintage stuff
High Efficiency Speakers,
intro and experiments
Supravox
full-range experiments in DTQWT cabs
Supravox
215GMF tweaking for better performance
Müll oder gut für ein Schlechtwetterprojekt?
Vintage Isophon P25A
Vintage ScanSpeak.
W21-3804-P2A and D3804 drivers
German SABA
greencones, pics, links and some modelling
1955 Karlson Speaker Brochure
Sonab OA5 mkII
speakers, Stig Carlsson's omnidirectional speaker from the Seventies
Spendor BC1
Philips 9710 Part
I-II-III
Philips
9710 disassembling
Philips AD-0160-T8, world's worst dome tweeter?
Blackcones,
vintage SEAS 21 TV-G and SEAS 9 TV-LG and resonant boxes
Clarion by SEAS, a
1978 classic 3-way from SEAS 25 F-WBX/DD, 11FM (H130) and 1" dome (H107)
SEAS kit 503, the
big SEAS 3-way of the Seventies
SEAS KIT brochure
SEAS KIT
303 crossover
Download
SEAS brochure (Norwegian) on kits 223, 253, 403, 603 and Disco-47
Goodmans
Axiom 150 mkII
Goodmans Axiom 150 mkII + Supravox 215RTF64 + LE26 dipole panel
(=OB7 article)
Dali800 renovation, new tweeter and crossover
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Loudspeakers in general/FAQ/tips/ideas, etc.
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CAPACITORS
Super caps, what
are they and why are they so expensive?
Jantzen Audio, Alumen-Z, test
Jantzen Audio, Amber-Z, test
Response to upgrade from standard PP caps to super-caps
Description of capacitor sound found in the web
Miscellaneous
What it takes to
make a crossover, - please read before asking for a crossover for your
drivers!!
Choices, How to pick
the right diy speaker project. Size matters. Please read before writing!
My
measuring equipment, books and articles useful for getting started in
loudspeaker building
High-pass filter for power amps
Passive to active? Why that is not so easy.
Time-alignment
of drivers. How to determine dZ
Inverted polarity, what is it?
Find the polarity of your driver
Calculation of box volume and ports. Can we calculate box volume at all?
Vent tuning,
calculation of vent length
Tips & Ideas, Glue
for crossovers, solder tag strips, flaring plastic vents, damping
materials, etc.
Edge-coating of drivers
Edge-coating and linear distortion, prelude to CNO-GRANDE construction
Definition of frequency ranges
Bi-amping, what is it? Some hints and tips
Room-gain, a case study
Measuring inductance of low-DCR coils, like C-coil
Use a Hypex FA251 or FA501 as a power amp for bi-amping
Inverted polarity, what is it? I'm afraid we need to spend a little time
here.
Passive to active: Convert a passive design to fully active
Room-gain, a case study
Beaming. What is it?
Cabinet
damping, please check this before writing on cabinet damping
Why it's not so easy to
make a small mini into a 3-way
The importance of
chamfering driver holes. A small study
How flat is flat?
Does a flat frequency response matter?
Why my crossover
layout may differ from actual schematics. A very common question
Room
Acoustics. Thoughts from Speakers' Corner with a few added comments
Electronic crossovers, pros and cons
Check here
what diffraction looks like!
From the excellent site of Art
Ludwig
How female
vocals can make your hair turn grey - and can low-order filters do
something about it?
Speaker cables and
interconnects
Power handling
of loudspeaker systems
Large domes, part
I. Test of SEAS T35C002, Chario Sonnet, modified Audax TW034, Ciare
MT320 and Accuton C30-6-024 domes
Tweaking the Audax
TW034XO-P47N dome for better performance
Tweaking SWANS
RT2H-A planar tweeter for better performance
Waveguide for
ScanSpeak D2904/710003 tweeter
More on
waveguides for ScanSpeak tweeters
Eight + one: Can we
make a 2-way from and 8" driver + 1" dome tweeter?
Wide Baffles,
introduction, Stradivari, how does wide baffles impact sound
reproduction
Study on
stepped baffles with little impact on tweeter performance
Make your own
non-inductive graphite resistors!
Tweeter
measurements
Find the polarity of your driver
My Panasonic TV,
better sound on a weekend
Coils for beginners
Choosing the
right point of crossover
What is an acoustic vent, aperiodic tuning, Variovent
Definition
of frequency ranges
The importance of
wiring crossovers correctly
SS 9500, 9700 and
9900 tweeters, why they are not interchangeable
Shipping
speaker drivers
Fountek ribbons
Fountek JP3 ribbon replacement, pdf file.
FAQ regarding sensitivity
and the choice of crossovers.
Links to other sites:
Want to hear what your
cabinet panels sound like?
Back to Index
Reviews/tests
Ortofon T5000 SUT
Thöress EHT Integrated amplifier. Can you handle the truth?
QUAD ESL-63
Test Audio Technica ART1000 cartridge
Testing ScanSpeak D2104/712000 3/4" dome tweeter
Testing new Jantzen
Audio AMBER-Z-CAP
Testing SBAcoustics SB29BAC-C000-4 Be dome
Testing EAR Acute Classic CD-player/DAC
Testing new ScanSpeak Ellipticor 21WE/4542T00 midbass driver
Testing BlieSMa T34B-4 Beryllium dome
Testing new
T34A-4 34 mm dome tweeter from BlieSMa
Testing ribbon
tweeter, Viawave GRT-145W-8.htm
Testing ribbon tweeter, Viawave GRT-145-4
LCR RIAA shoot-out, EAR-912 vs vdh The Grail vs Valab LCR-1
Testing EAR 912 preamplifier with phono-stage
Testing Alumen Z-Caps from Jantzen Audio, a new foil capacitor
Testing Audio-gd pre-amp/headphone amplifier NFB-1AMP
Test ATC SM75-150 midrange dome
Test of ScanSpeak D3004/604010 Be domes
Test
of two ScanSpeak ring-radiators, R3004/662000 and R3004/602010
SAC
Thailand GlowMaster KT 88 fully balanced power amp
Test of van den Hul The
Grail phono stage
Large domes, Test of SEAS T35C002, Chario Sonnet, modified Audax TW034, Ciare
MT320 and Accuton C30-6-024 domes
ScanSpeak tweeters, D3004/660000 and D2904/710003, D3004/6640 Beryllium
dome and D2908/7140 Beryllium dome
Test of
DiyHiFiSupply EZ line stage
Test of MANGER MSW
transducers
Norwegian Wood, review of MAE1, Single Ended Tetrode Amplifier Kit from
Norway
Review of
vintage Snell A3i loudspeaker
Chario
Academy Sonnet speaker
Jungson JA88D-09, 2 x
80 watt class A solid state amp - or at least some of these watts in
class A ...
Jungson
Duro power amp
Garrard 401/LINN - Thorens TD124 mkII/Jelko shootout!
Test of Lowther EX3
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Main System
Kuzma
StabiR turntable, Kuzma 4Point9 tonearm + Ortofon Anna D cartridge
Yoshino EAR Acute Classic CD-player/DAC
Yoshino EAR-912, pre-amplifier, line-stage/phono stage
2 x Yoshino EAR-861, 64 wpc bridged power amplifiers
van den Hul The Grail phono stage
ScanSpeak Ellipticor-A50-II
SEAS CNO-4
ScanSpeak Revelator-851
ScanSpeak Illuminator-71
QUAD 2812
WORKSHOP SYSTEM and stock speakers
Kuzma Stabi R with
Jelco TK850S + MSL Eminent EX cartridge
Yoshino EAR-868PL
Phono/Line Stage Preamplifier
Yoshino EAR-861, 32 wpc power amplifier
ScanSpeak Illuminator-71
Purifi-6R
Purifi-Be
Hypex Ucd400,
400 wpc digital
power amp
(for bi-amping when needed)
Shanling 2.1
CD player
For most larger speakers I use bi-amping,
Hypex Ucd400 or
Hypex FA501 for the bass and
EAR-861 for mid-tweeter. Go to bi-amping
here to see what bi-amping looks like.
Bi-amping means you have a line-stage, a
pre-amplifier, driving two power amplifiers, which each runs either bass
or mid-tweeter. This requires the crossover is separated in bass section
and e.g. mid-tweeter section.
Bi-wiring means you have the same amplifier connected to bass
and mid-tweeter with separate speaker cables. It also requires the
crossover to be separated in sections for bass and mid+tweeter.
Miscellaneous
LP GEAR, The Vessel B3SS, MM cartridge
My living room rack
High-pass filter for power amps
BI-AMPING: WHAT IS IT?
Speaker cables and
interconnects
A few formerly owned components (except speakers):
Yoshino EAR-869, integrated/power-amp
SAC
GlowMaster KT88 PP, fully balanced power amp
Jungson JA88D-09, 2 x 80 watt class A solid state amp
Maglev
turntable, SME 309 GD tonearm, My Sonic Lab Eminent EX cartridge
Shanling
CD-T80 CD player
DAC:
Musical Fidelity DAC M1a
6N6P line stage with
output transformer
2017, renovating two Lenco L75 decks
Lenco L78/Moerch DP6
9" Precision tonearm, vdh Canary cartridge
Lenco L75 + Moerch 12" tonearm, vdh Colibri cartridge
Lenco L75, Jelko 12" tonearm
van den Hul
Canary cartridge
van den
Hul Colibri cartridge
Project RPM4 turntable, rebuild
Phono stage based on Transcendent RIAA schematics
Jungson Hedo/Duro power
amplifier, the power amp section of the Jungson JA88D-09
Einstein The Amp
Garrard 401
turntable/Jelko 750D
300B, 8 wpc SET integrated amplifier
Audio Mirror,
Vladimir Bazelkov's 6AS7 PSE, 20 wpc mono blocks, rebuilt to 6C33 tubes
Thorens TD124
mkII/Jelko
Transcendent Grounded Grid line stage
Transcendent
Phono Stage
Audio Research SP16L
Copland CTA 505
Numerous LCAudio
power amplifiers
DACT line stage
Numerous home-made valve line stage
amplifiers
Luxman MQ70 (EL34) power amplifier
Erno Borbely MosFet power
amplifiers
Danish High Fidelity magazine preamplifiers, MC, phono and line stages
Back to Index
Click logos to go to websites
Crossover components found on this website are sponsored by Jantzen Audio, Denmark. Jantzen Audio has the most extensive range of baked coils available, supplemented by a wide range of audio grade capacitors. In addition to this a wide selection of components for speaker building.
Complete
crossover kits for the shown constructions can be ordered at:
contact@jantzen-audio.com.
For SEAS, ScanSpeak, SBA, Purifi and some AudioTechnology constructions, this can include drivers as well.
I'm particularly grateful to Jantzen Audio for taking the financial risk
of launching the
JA8008
and
JA8008-HMQ drivers. Without their support these drivers would never
have been made.
Some of the drivers used in the constructions were
sponsored by Jantzen Audio (SEAS
drivers), ScanSpeak,
AudioTechnology
and SBAcoustics.
Thanks to those who made this possible! Without your support only a few
constructions would have made these pages.
None of the constructions shown at my website were suggested by any of my sponsors (Except for MUN-17 and Ellipticor-1) and I'm not financially affiliated with any of my sponsors. For questions regarding the constructions on this site, please contact me at: troels.gravesen@hotmail.com
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