Another Voigt tube?

Hello,
I am looking for plans for a cabinet to fit my Scan-Speak P17WJ speakers. I have recently built DDVP-20 cabinets for my Visiton BG20s. I loved the bass and would like to get a similar sound again. Can you suggest a model I could make? Thanks Very much.
Rick
 
Corrected the spellin of Voigt for you.

p17wj00.jpg


You wilol rpobably need to model the line yourself.

dave
 
After application of caveman ocr and browser translation (help appreciated), a hack at preceding p4:

"continued from page 19

clay that can cheer in the charging chamber, can
used. If there is a possibility, live
the speaker is mounted from the outside, since then
can be easily removed and thereby give access to it
first part of the horn for any juste-
Calling and experimenting.

Peerless B 65 FM has been used in
Some of the prototypes. If it is installed
directly in the cabinet, one is calculated
rather long ink@rsel period, for the
is rounded in the bass and nuanced in
The treble. That's because its ophagen is
rather rigid, and it is therefore allowed for
the installation to allow it to work heavily in
“free tuft’ (3 Watt brum, e.g.), sa
the group is being worked through and
elastic. The horn charge of the membrane
prevents large fluctuations and provides an outer
enervating sound pressure in space — therefore:
Let it woe before installation.

It's the cheapest broad-handed we're
have been able to find with reasonably strong
magnet and appropriate magnitude. (price re-
kring 75 kroner).

Adjustment

The relatively large membrane sends a lot
of the midrangeal range down through hor-
net, so this area is reproduced a little too
powerful (frontstring + hornstring).
Therefore, it is necessary to soak up a little
this horntrling to smooth frequency-
the hallway.

A piece of Rockwool placed in the horns
last building takes care of this problem
{the placement is marked with a foam-
rubber block on “intrusion photography”).
The Hell of Rockwool ma the individual
experiment with — partly because a certain
adjustment of the sound in relation to signal sources,
Tum and personal taste can happen here. It has
proved easiest to start with approx. it
double the meagre that is suitable in
the building instructions and then remove gradually, to





Horns with removed front plate

The best result is the end. There can not
fills in a lot, sieves the air does not have free
Passage.

Sound and location

| considering that box + unit (without
finering, etc.) star in a good hundred-krone-
note, tor we guarantee a viewer's share of happiness-
Not the result of the desiccation.

There is undegrin and absolutely hereable
level back at 40 Hz and impulse forarance-
the work (obviously) is in order with
“rororrhage” pedal tones from organ and “breast ban-
know” beat drums and pauks, the Treason
should have a little help from the headmaster, ice cream
at location with a certain angle between
cabinets (ma preferred clean sound-
meessigt).

This angle of the cabinets is nature-
equated with a decision on veg,
However, you can do this on the following food:

Screw a pair of powerful gnaws in each back plate
by the sides facing each other, fools
The keys must be raised. Then make a
pairs of shaking or the like that fits in @skerne,
in the vagen and hengttal speaker cabinets up
herpa.

The keys can now hung plant against
the vegg or turned out of a
Preferably angle from O to 90 degrees can be upnased.
This will be the opportunity to have
the cabinets hacking pent into veeg-
gen, when they are not in use and in the
sound-mesesightly best angle while there
Played.

At the time of the placement of the bookcase, there must be
approx, 10 cm distance. as a minimum from
the bending at the bottom and for the second-most surface.
@squeeing the cabinet placed on the floor
— possibly on a pair of legs — the abningen reverse
upwards and possibly. decked with a grid or
something light fabric (if you don't want to
empty it for waste every time that has
Veret gestures).

Phase

Phrase of the households is done at the same
made as at the “floor horn”’ imaj-num-
Court:

The ends of the connection line are coupled
in on a small battery and turned as a way that
The hojttaler membrane swings inward, ° flare
The battery is connected. The conductor that
here bergerizes the battery's plus-pol, must forb-
des to the defender's "warm" leg (pa
DIN-andt speaker connector soldered to the round
legs).

Other personnel units
The charging chamber is dimensioned, see it
continued side

mu
"
 
- for inspiration-
NOTE! Driver specs are different than the p17wj

Google Translate
https://translate.google.com/?sl=auto&tl=en&op=translate


Wavetube152- waver WF152BD03/04, 6"
https://www.gazza-diy-audio.de/speakers/wavetube-152/
https://www.lautsprechershop.de/pdf/wavecor/wavecor_wf152bd03.pdf

Xanthippe-HK-Audio ML 6, 6"
https://www.donhighend.de/?page_id=5029

Morelline 162, Morel 162, 6"
https://www2.audiokit.it/ITAENG/KitDiffusori/trasmiss/MOREL/Lin162-1.gif
https://www2.audiokit.it/ITAENG/KitDiffusori/trasmiss/MOREL/Lin162-2.gif
https://www2.audiokit.it/ENG/Frames/Introduction1.htm

Morelline 166. Morel 166, 6"
https://www2.audiokit.it/ITAENG/KitDiffusori/trasmiss/MOREL/Lin166-1.gif
https://www2.audiokit.it/ITAENG/KitDiffusori/trasmiss/MOREL/Lin166-1.gif

Omnes Horn- TangBand W6-1916. 6.5"
https://www.lautsprechershop.de/hifi/omneshorn6.htm
page 16
https://tuxdoc.com/download/klangton-2012-04pdf_pdf#google_vignette


Don Highend, ThreeeSixtyFive
https://www.donhighend.de/?page_id=6034
Peerless SDS160F25PR01-08, 6.5"
https://loudspeakerdatabase.com/Peerless/SDS-160F25PR01-08/Peerless_SDS-160F25PR01-08.pdf
qms 2.97, qes .58, qts .49 vas 30 litres

old 1995
OA-Transient II-Ronald Koot from SpeakerBuuilding.com
Scan-Speak 18W/8542-05, 7"
https://web.archive.org/web/20101129145208/http://speakerbuilding.com/content/1033/

Martin King Satori WO24P-4, 9.5" with math
http://www.quarter-wave.com/Project13/Project13.html
http://www.quarter-wave.com/Project13/Satori_TL_Design_Documentation.pdf

TQWT
http://www.donhighend.de/?page_id=1320
=====
Andy Grades-old
https://web.archive.org/web/2010052....optusnet.com.au/~gradds55/ARGOS/terry's.html

https://web.archive.org/web/2010050...com.au/~gradds55/ARGOS/tapered_pipe_plans.pdf

Dave Burke-PartsExpress Gallery
https://projectgallery.parts-express.com/speaker-projects/the-pipes/

SpeakerBuilder.net -OLD
https://web.archive.org/web/2011103...eakerbuilder.net/web_files/calgen/calgen1.htm
 
Last edited:
another possibility
Neil Blanchard MLTL-6

https://www.nbdesigns.work/shop/p/mltl-6-mass-loaded-transmission-line-speaker-build-manual
They are 25" x 19" x 9" and weigh about 54 pounds.
Sonnorra (says SB16)

https://solen.ca/en/products/sb-acoustics-sb16pfcr25-4-18cm-fiber-cone-woofer-4ohm
SB Acoustics SB16PFCR25-4 6" Paper Cone Woofer - 4 ohm, fs 35 hz, qts .34 vas 33 litres
Compare to the Scanspeak P17WJ (vifa)

He was probably developing these...

post #124
https://audiokarma.org/forums/index.php?threads/mass-loaded-transmission-line-speakers.970929/page-7

(NOTE)
The cabinet is 9”W x 21.5”H x 16”D / 227mm x 546mm x 407mm and is made with 18mm thick material - either Baltic birch or MDF.
MLTL-6 Drawing - 05.png



There was a picture of the inside of the MLTL-6, showing wire mesh attached across the opening (horizontal brace to the back & sides)
Upper cabinet stuffed (amount?)
==

Another MLTL, XRK971 RS225-8
1701047781612.png




20230922_221536.JPG
 
Regarding that vintage Danish design. I have listened to it using several drivers ranging from a 4" Altec Lansing A405 to 6.5" Philips fullrange and it sounded surprisingly good. I am sure a modern massloaded fuzzy TL with internal resonators and optimal placement of driver and damping material is way better.

Make an adaptor plate and mount the 6.5" driver in the DDVP-20 cabinet that you have.
If you like the result go for an identical cabinet or scale all dimentions down by about 6.5/8. You can also go the simulation route, and try out endless designs in silico.