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In Reply to: RE: Which SET is next logical "step up" from 300B? posted by Mick Wolfe on June 06, 2022 at 10:46:40
How big is your listening room? Mine is only smallish 100 sq ft (10' x 10') and that's why I want to go down in power for further refinement, etc.
Well, since you've now mentioned the 10'x10' room, I can't see a lower powered amp solving anything. Coming from an experiment where I tried to cram my H3's into a similar 10'x 11' room, I can tell you the Heresy needs a bigger room to breathe and sound its best. If I were to spend money on anything, it would be for a speaker that's designed to work better in that small acoustic. The Heresy is just too energetic a speaker to perform its best in a 100 sq. ft. room. If you're looking for more refinement, I would retain your 300B amp and choose a different speaker.
If that option is off the table, room treatments may be the only other logical approach. They can certainly yield a more refined presentation if properly implemented.
Heresys sound far better if you use 4 of them.
Stack one on top of the other. Series the two
electrically, use top-notch wire (a cheap, GREAT
wire would be silver-plated Mil-Spec. 12ga.).
You will now have all the bottom-end you need,
and can better feed the room at low volumes.
If set up right, this arrangement will work
well for your room size.
You can run LESS power (in your room) with 4 speakers
(due to much more-efficient coupling to the room)
than you had to use with only one pair of Heresys.
You are taking a look at two different things. Quality of sound and volume.
If you have too little power, then there will be no bass. If the amp has poor quality sound, it will sound bad. Driving large iron with small power will result in poor bass. Not sure how you get around that one.
Volume is a different issue, and the smaller room plays into that. If memory serves, Heresy are the smallest heritage speaker Klipsch makes - I was running a pair of Forte in a fairly small space with no issues.
Once you get the speaker to sound good, then you need to make sure it can sound like that at all volumes. One problem with low volumes is using the standard resistive dividing network for volume control. To 'turn down the volume' you dump your hard-won signal as heat into a resistor (as opposed to it going to your amp). Most volume pots are not linear, so when you are at 'half volume' you are dumping more than half your signal as heat.
If your low volume performance is poor, you might want to try a quality TVC (transformer volume control). Like in all things, getting a TVC with crappy transformers will likely not turn out well.
I agree with much of what you say, but neither the Heresy, or the Forte for that matter, will ever perform their best in a 100 sq. ft. room. They're just not designed for a tiny space. You can certainly achieve somewhat acceptable sound, but never optimal. As I've said, if the OP is resigned to his current set-up, room treatments are his best option. This especially if his goal is added refinement. Buying a lower power amp would just be an expensive move sideways that doesn't solve the core issue. This assuming of course he has a very competent 300B amp already.
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