Pic of new Stonehege V's with GPA's 604s

**magnarc** · June 24th, 2010, 12:59 AM

That volume is about that of the ALtec 620/620A cab, which was the largest and imho best sounding cab for the 604s.

The Stonehenge V was designed to have around that same volume, just with a smaller footprint.

**atilsley** · June 24th, 2010, 01:24 AM

Thanks...That's what Todd suggested....though I always thought the 620 was smaller...?

**analog addict** · June 24th, 2010, 07:30 AM

Hmmm....good question. Here's the spec page, and here are some cabinet plans.........

The grills add about 2" to the depth, and the cabinet necks down slightly between the horn and woofer enclosures, but it is continous internally. One of the real experts will undoubtedly have that number.

I've also been told that if you have the room for a 18-20 cu ft cabinet, you can push 604's down to close to 20 Hz....

**Panomaniac** · June 24th, 2010, 08:30 AM

Yes, I've done it. You end up with what is called an "Extended Bass Shelf" alignment.

**Altec Best** · June 24th, 2010, 03:43 PM

Originally Posted by atilsley

Thanks...That's what Todd suggested....though I always thought the 620 was smaller...?

No the 620 cabinet is around 9 cu.ft. which would be slightly larger if Magnarc's dims. are correct.GM said to me awhile back that any Full Range cutout ie; 604 in a cabinet should have the cutout flared.

**atilsley** · June 24th, 2010, 05:31 PM

OK, thanks guys.

we might front-mount the driver to be safe.

**Altec Best** · June 24th, 2010, 05:47 PM

Originally Posted by atilsley

OK, thanks guys.

we might front-mount the driver to be safe.

Altec front mounted most cabinets.With their 16" frames anyway here's a picture of the flare on my 612C cabinets.When these cabinets were purchased new from the factory they came with 604-8G drivers & crossovers. Good Luck w/project.

I think bringing some Altec choices to your site will be a nice addition

**LICORNE** · June 24th, 2010, 06:26 PM

I heard 620 and model 19 side by side . The difference is "palpable" but my preference is the Altec A-5. All 3 models with Mac Amps.

**atilsley** · June 24th, 2010, 06:53 PM

Licorne

Can you describe the main audio differences between the 620 and the 19, as I'll be building 'new/old' 19's down the track (using trackhorn and GPA 902 comp driver).

Andrew

**atilsley** · June 25th, 2010, 09:28 AM

Latest pics attached....lovely...spent hours rubbing in heavy wax polish.

The pics don't do it justice...but reminds me of this from Shindo.

Had a pleasent evening comparing Unison KT88 SET amp (12-watt) vs Unison Push-Pull EL34 (40 watt). The SET was the winner by far.....PP too much (even) given my quite large room.

But, what a BIG sound overall....quite stunning...with great warm bass to 34Hz...then rolling off to 28-30Hz.

More pics here from Stereo Net AUST.

Very happy....