I used to work with the former Chief Engineer of Dynaco. At the time he was using six Dynaco A25 speakers (10" 2-way) per channel, stacked on their sides, with the woofers on the outside. Although I never heard it, he said it sounded wonderful, very realistic with low distortion at high volume levels.

Yes.

There are some that insist that comb filtering interference will make them unlistenable.

How do you wire that and won't it half the impedance of the speaker?

I'm running two Phase Linear 400 amps, one channel and 8 Ohms per speaker. Many people run them in parallel with a single amp that can handle a 4 Ohm load.

Forgive my ignorance and quick question (I'm new):

Are the doodads in the corner bass traps? Other acoustic treatments? Or what?

Thanks ...

Not at all an ignorant question!

They sure look like smallish bass traps to me.

And Welcome!

GIK Tri-Traps

http://www.gikacoustics.com/products.html

Buddha - Where are you going to be at T.H.E.? I had to take some time off from CES but am back on schedule again. It would be great to meet you out there. I LOVE the Alexis Park location....the Venetian setup just stinks.

Anyways....I know Matt Polk has talked about stacking some Polk SDA SRS 1.2 back in the day. It's already an 11 driver beast that stood about 5.2ft tall alone....can't imagine that wall of sound. I've played around with stacking some A/D/S a long time ago and it was neat but not something that lasted. Great pics!

Mark

Quote:
Anyway, anybody else with some good stacking outcomes?

Hola oh wise one,

One of the classics for stacking is the Quad Electrostatic. I was trying to find a picture of Alistair Robertson-Aikman's (head of SME) legendary set-up of stacked Quads driven by Krell MRAs but a quick trawl around didn't turn any up. However I was surprised to find entire websites devoted to Quad stacking!

Quote:

Quote:
Anyway, anybody else with some good stacking outcomes?

Hola oh wise one,

One of the classics for stacking is the Quad Electrostatic. I was trying to find a picture of Alistair Robertson-Aikman's (head of SME) legendary set-up of stacked Quads driven by Krell MRAs but a quick trawl around didn't turn any up. However I was surprised to find entire websites devoted to Quad stacking!

In Long Beach CA, in 1975, I listened to a horizontal array of 6 QUAD 57's driven by modded Dynacos. It was rather heavenly!

Very old thread but...

Since nobody mentioned it over a decade ago: stacked (tweeter-to-tweeter) pairs of Koss CM/1030 speakers sound fantastic!

I use five stacked pairs in my main HT.

Each speaker (not stack) gets driven by a single channel of a Carver A400x stereo power amp, so five such amps in total.

This arrangement places the acoustic centre of each stack at exactly my ear height, when seated.

While I've never tried it, I suspect that stacked pairs of Koss CM/1020s would sound very impressive as well.

I place a single layer of rubber/non stick "shop mat" material between each speaker. On the rare occasion where I have had to take a stack apart, there has been no sticking-together and no marking of either speaker's cabinet.

Jeff

I don’t actually stack my speakers, but they are close. My Sony CSS5S sit on top of 26” stands approx 7 ‘ apart. My Polk T15 sit on the bottom shelf of my stereo stand. They are a few inches above ground level and about 6 inches in side of the Sony’s.

They play well together. I have not noticed any phasing problems nor other conflicts between them. I set them up as “A” and “B” speakers. This enables me to play them separately or together.

When played together, they seem to compliment each other as the Polks do a great job with low frequencies while the Sony’s are great at the high end. Maybe I’m just lucky or perhaps am not a very good critical listener, but this pair sounds good together.