[jk@home]

These plastic sliders work great on carpet. Even if just for a temporary solution.
https://www.lowes.com/pd/Scotch-Scotch-8482-Sliders-SP652-NA-Reusable-Hard-3-5-in-4-pk/1002964414?store=1593&cm_mmc=shp-_-c-_-prd-_-hdw-_-ggl-_-CRP_SHP_LIA_HDW_Online_E-F-_-1002964414-_-local-_-0-_-0&gad_source=1&gclid=EAIaIQobChMIuJ6DmeH9igMVAW9HAR2ykRNfEAQYAyABEgKIYPD_BwE&gclsrc=aw.ds

[Poultrygeist]

Interesting sliders. One issue I have is maintaining a decent back tilt to the baffles so the F-15's fire toward my ears. Some of the barrel shaped baffles ( incorrectly called Betsy's ) seem too low to the ground to get much of a tilt.

[opnly bafld]

Turn that frown upside down. 

[opnly bafld]

Then you need a tweeter because 15" wideband off axis....

[FullRangeMan]

Turn that frown upside down. 

Nice experiment. How sound the soundstage this way ?

[Poultrygeist]

Can't have much of a back wave.

[opnly bafld]

Nice experiment. How sound the soundstage this way ?

I couldn't say, didn't bother to listen to them at Decfest last October.

There is a long thread about them (I haven't read it), maybe a way to put the speakers against the wall instead of out in the room??? As PG mentioned above, not much of a backwave.

[gils]

hello,

This sub H-Frame

Rainy weather, back to indoor tinkering!

I had an Infraflex 90x90 cabinet taking up space, and I have two 18-inch JBL 2279H drivers (short voice coil). A bit of experimental tinkering, and all in all, the sound is quite pleasant.

The subwoofer is clean and fairly precise despite a rather complex modal response. It goes quite low, it handles the power well, so why not use it?

T&S drivers used.
SD  1290
RE  5.6
BL  22.45
VAS  363 L
QES  0.38
QMS  5.05
QTS  0.35
MMD  150 g
MMS  177 g
Xmax  8 mm (évalué sur la base du 2278 H)
Pmax  800 W
Fs  30.61 Hz

The circuit uses an analog active crossover and a 150W Class B stereo amplifier (one channel per speaker).

It's basic, but it's an estimate.





Quelques mesures faite à 1 m dont une à 100 db/2.7 V



decay sur 320 ms








mesure HPs séparés courbe verte et rouge puis les deux combinés courbe bleu



And video

https://youtu.be/PltrMse7luI


cordialy.

[Poultrygeist]

I recently added a single Lii Audio W-15 to augment the bass and couldn't be happier with the results. The W-15 is so heavy it requires its own baffle as well as wheels to move it around.

[Poultrygeist]

[Poultrygeist]

[pompon]

Here my OB!

FaitalPro 18fh500 as woofer (45-250hz)
Supravox 215rtf64 as mid (250-2800hz)
Raal 140-15d for highs (2800hz+)
Rel G1 for under 45hz

[opnly bafld]

Here my OB!

FaitalPro 18fh500 as woofer (45-250hz)
Supravox 215rtf64 as mid (250-2800hz)
Raal 140-15d for highs (2800hz+)
Rel G1 for under 45hz

Nice (low budget  ) build.

[opnly bafld]

Waiting for it to warm up a little so I can make baffles for a pair of Zenith 49CZ903 drivers.

[opnly bafld]

4' x 2' x 3/4" birch plywood baffles - mounting holes cut yesterday evening - no bracing yet - no legs/support - held up by an ottoman (L) and a DR table chair (R) so I can listen/evaluate.
So far I am impressed with the bass from these Zenith 49CZ903's (FS is @ 52Hz - some 30+ Hz lower than the popular 852's) with the music I mostly listen to (Brubeck, Petersen, Webster, etc, Mozart, Paganini, etc).
I was listening to a Focal demo disc at louder SPL's than I realized (louder than I normally listen) when a choral piece (Verdi track #14) made these drivers fall apart*, everything before it was pretty good, and the choral piece was much better after lowering the volume control some.
If you like complex music fairly loud these are not for you. Hopefully you already knew that.





* part of the problem may have been the 1~2 watt inexpensive triode strapped JBH 6P14P tube amplifier I was using was past its limit.