Valves for mid high, SS for low in a Chorus II.

[mike stehr]

Howdy!

I have no plans of doing this currently, I'm just

curious of the opinions of others.

What if a guy took a Chorus II, split up the passive

X-over so the Bass circuit is separate from

the mid tweeter circuit, bi-wire the Chorus II,

and then use a Solid State amp on the Bass

section, with a tube amplifier on the mid/high

section.

Would this be of much sonic benefit?

If one did not want to use passives, you could

go active crossovers.

But IMO, a tube x-over would be best for the

valve amp, so passives seem like a more economical

choice.

It would not take much to power the mid and tweeter

horn.

Seem like a dumb idea? Opinions?

THANX!

MERRY CHRISTMAS!

[soundog]

I've heard and read of this being done. Usually with old horn speakers where it seems to be the general concensus that these horns sound best with tube amplification. It also seems that some beleive that transistors produce better bass. But, of course, a lot would depend on the quality of the amps, the speakers, the crossovers (I am yet to fully understand the differences in crossovers and which is best to apply under what conditions). I am very pleased with the results I get with my Khorns using Al's ALK crossover and a very good quality tube pre-amp and a very good transister receiver. Both Al's crossover and the tube pre-amp contributed (as well as my experiments in acoustical room treatments) to taking the edge off of the horns, although the final piece was a Dan Wright modification to my Perpetual Technologies P3A DAC which took the last piece of edge off of the highs. But then the P1A which converts CDs to "super" CDs helped too. My experiment with replacing the K400 horn lens with an Altec 511B produced mixed results - improved mids but an increasingly annoying edginess at some frequencies which I beleive is from inadequate damping ( I spray dampened them but it seems like I need a much heavier damping effort which I have had to lay aside due to Holiday demands). Its fun to experiment but it has its pitfalls and frustrations. Besides this forum try the Audio Asylum high efficency speaker and tube forums for more information. For the Holidays I decided to just enjoy what I have which is very very good and put the frustrating experimentation aside until the January doldrums set in and I have time to fill.

------------------

Soundog's HT Systems

This message has been edited by soundog on 12-24-2001 at 08:44 AM

[mike stehr]

Yeah, maybe I should post this in AA when I get

up the courage.

I made some passive x-overs for these speakers

using the original schematic and the parts

AL K. uses, still in the process of final tweaks.

I like what I hear so far.

THANX!

[djk]

"It would not take much to power the mid and tweeter

horn." True, if you were to eliminate the passive crossovers. http://www.audioasylum.com/audio/general/messages/164118.html

[mike stehr]

Thanks for the link there, djk!

Bookmarked the Rod Elliot article for later reading.

Of course you eliminate the speaker passive x-overs on a active crossover set-up, bi or tri amped.

Kinda defeats the purpose otherwise.

I just bought the Pomann active crossover kit.

I bought it for use with subwoofers though.

I would need two more amplifiers to make a 3-way

plus 2 subwoofers, bummer.

I could go three way with one more amp without subs.

You could use the passives on the mid high end,

Bandpass that section of the active to whatever

frequency required, and get away with two amps,

But then that kinda defeats the purpose again.

what I was thinking is, use the solid state active

crossover on the bass/sub section, then use a

active crossover using tubes before a valve power

amplifier.(I think Steve Bench has active tube

X-over designs/schematics.)

Pipe dream now, maybe someday.

THANX!

HAPPY NEW YEAR!