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In Reply to: Can these low powered amps really control the Cornwall's 15 inch woofer? posted by mshan on February 6, 2007 at 12:45:22:
Yes it can. I never needed any more than a SET 2A3 to drive my Cornwalls.If I remember correctly, it is also rumored that Paul Klipsch designed the Klipshhorn around a push-pull 2A3 amp so that should give you some indication.
-- josé k.
Follow Ups:
Hi Jose:How much difference between a 2a3 and a 45 or 6c33 (?) SET amp for the Klipsch Cornwall?
Or should I just be looking for a 2A3 amp (from my limited reading, it seems it's difficult to produce a bad sounding 2A3 and that most of the sound is due to the output tube chosen) or one of these other types of SET amps?
I wouldn't agree with your assumption that most of the sound is due to the output tube, or that any 2A3 would drive your speakers. the type of circuit used will have a big difference and the operating points of the tube and the quality of the output xfmr will all have a major impact on the amount and quality of bass, and the damping of the amp. when all these are optimized, then you're really in business.
Ideally, I'd like to find a budget 2A3 integrated, though I'm starting to suspect they don't exist.May I ask what the known synergistic 2A3 amps / integrated amps for the Klipsch Cornwall are?
I know nothing about these low powered amps, so recommended names will give me some things to research and learn about.
my bottlhead sex amp (6dn7) mates really well with my klipsch forte ii's and i bet their paramour 2a3's would go well with the cornwall's. you could check their forum to see if anyone their has done this.
several have spoken highly of Bottlehead/Klipsch combo, and many others used Pi's with them which are a lot like upgraded/modernized Klipsch's. I use Paramours and drive a 15" Eminence Omega, which is considered to be a difficult load for a tube amp with no problemo. I think the ss psu and the parafeed contribute to it, and the stock use of 4K xfmr gives a little extra damping, although an upgraded xfmr will give mo' better bass.
Is this what you consider the best 2a3 amp for matching with the Klipsch Cornwalls?It seems really nice, but it is apparently no longer produced and is kinda of expensive (seems like $1500) even on the used market.
I'm running the Cornwalls with a DIY 45 amp that puts out a watt and a half or so; plenty of power. It won't blow you out of the room, but who wants it too? Late at night when the house is quiet and I'm getting cleaner power, there is no substitute. I listen strictly to vinyl and only a few pressings I own sound 'quiet.'I've done a head to head shoot out with the 2a3 vs the 45 and the 45 is the clear winner, more detailed tube, sweeter midrange, really better at everything.
The 2a3 is no slouch mind you but the extra watt and a half or so I would gain from using the 2a3 isn't worth losing the 45's near perfection as an audio tube.
One of the key factors in selecting an amp (besides the tube) is the quality of the output transformers and the synergy of the parts used.
Etch:Just curious, what brand(s) of 45s are you using?
Gerry
P.S. I also use a "custom" 45 amp with OB speakers.
Hey Gerry,I built the circuit by Matthew Reidsma called the Experimenter 45, it was featured in SP years ago, very cool amp, funky with the od3's too. Very simple, sounds great! haven't compared it too the JE Labs of the Loftin White so I don't know how it stacks up...
I also built Joseph's OB's with Fostex drivers, very cool just not quite efficient enough due to the small size of the baffle for my 45 amp, worked great with my 5 watt push pull mono blocks.
I got the circuit from Yeo's site, DIY Paradise, very cool guy, fun site too. there is an amzing little pre on there based on a Kondo San circuit I built as well.
Hi Etch:It sounds like you have put together a really nice "bang for the buck" system. However, my question was, what brand(s) of 45s are you using (ex. old stock, TJ/FM/Sophia or EML)? Thanks.
Gerry
Forgot to mention that the 45's themselves are (were) NOS RCA.
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