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Frugel Horn Support Woofer/Sub

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#21
Hi,

While I like the actual look of the stealth woofers, it would be nice to know if anyone had tried the OB bass (i.e. some 15" or 18" in H-frame). Assuming that one has enough space to place it, it may work...
I am saying this because I remember that some time ago Jeff (Godzilla) had tried smallish BIBs with H-frame woofers underneath and was very satisfied with the sound....
 
#24
fastbike1 said:
Are you sure about that? Not much info on the Fosters, but plate amps often have a ~100 to 125Hz second order XO when using the high level speaker outs.
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planet10 said:
If Jack Hidley doesn't still have it up, i have the info at home. The Fosters have a variable 2nd or 3rd order low pass, <50~150 Hz. Not ever used the high level in.

dave
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pretty sure about how this particular implementation was set up- i.e. at speaker level, piggy backed in parallel to the mains via Pomona dual banana plugs

even if the Foster ( or other) plate amp(s) had a HP on the speaker outs, I'm guessing that to keep part size to a minimum at the 120-150Hz range they be using EL caps, which I'd generally want to avoid at all costs . decent quality film caps and air core inductors for even a simple 1st order XO at these frequencies could easily cost half or more the price of budget plate amps - not to mention take up more space than the entire power supply

My own setup with the Foster amp is the opposite of Dave's - it's tidier for me to use the line level inputs
 
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#29
Hi Dave:
I need a driver, & plate amplifier, & flat pak if available.
Pls explain where my calculations have gone awry.
17 litres = 17000 cubic mm, the cube root of
which is 25.7123 mm or roughly icubic inch. I know the
enclosure has to be roughly the size of 4 - 4 litre jugs
of milk.

Regards,
Bert
 
#34
Application / room size? I'd never day "never"

For home theatre, 2.1 and beyond, that's a given, and having lived for numerous weeks with several iterations of amplification and crossover schemes for the Alpair 7/12 MTMs, I can attest that even for domestic 2 channel audio, relieving any full ranger driver this size class of the bottom octaves can yield benefits way beyond the cost.

My daily drivers are Alpair10P in compact floorstander in a 7.1 system with decent enough little corner mounted woofers, but for music only, well ... I'd take the MTMs and 4 channels of TomChr's Modulus 86 in a heartbeat - which would of course be one more justification for playing with something like a minidsp 2x4HD.
 
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#35
What would be the cut-off frequency setting for the sub in order to integrate with FHXL Alpair 10.3M?

chrisb said:
Application / room size? I'd never day "never"

For home theatre, 2.1 and beyond, that's a given, and having lived for numerous weeks with several iterations of amplification and crossover schemes for the Alpair 7/12 MTMs, I can attest that even for domestic 2 channel audio, relieving any full ranger driver this size class of the bottom octaves can yield benefits way beyond the cost.

My daily drivers are Alpair10P in compact floorstander in a 7.1 system with decent enough little corner mounted woofers, but for music only, well ... I'd take the MTMs and 4 channels of TomChr's Modulus 86 in a heartbeat - which would of course be one more justification for playing with something like a minidsp 2x4HD.
Click to expand...
 
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