@charles1dad Charles I feel like a heretic buying the XA25! It’s the first solid-state amp I’ve owned that I actually was intrigued with sonically within a few seconds of hearing the vocals and midrange play even while it was cold right out of the box. The gestalt was very jarring. My preconceived notions of solid-state are forever altered. Pass has devoted so much of his time to his First Watt amps and he sneaks this XA25 amp into his line up, which is nothing like the rest of the XA .8 series which use many transistors and have actually worse specifications. The utter simplicity of the XA25 along with it’s truly single ended circuit seems to be winning me over. I had 2 people suggest it to me whose opinions I value and so I decided to take the plunge and try it just to prove them wrong, but I am very pleased with it. Terry London’s Review mirrors my own sentiments regarding this amp being built entirely around the midrange and that it’s as close to SET like I’ve ever heard.
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@ JCARCOPO i am happy that you like the encores as i stated i did not what to hijack the post i do not what to argue.what i was saying is most speaker company are miss leading in there numbers.your right 15watts is all you need.i can’t used more then [email protected] seat 13’ the spl is 106 Db.but @1watt its great.your art audio diavolo SET-300b tube amps are great.that 1-watt in that amp is what i live for in audio.but it is more then just spl? you know that. the jbl i use are two/way.the $2500 i paid for them.i have not found better for what they sound like and cost i found better the jbl everest but at $60,000? if you found audio happiness with *encores*thats the audio (grail).don’t stop until you you drink from the silver cup.why are you reading this? GO listen to the (ENCORES) over and out.
It's a 10 to 1 ratio with wattage anyway. It takes 1000w to effectively double the output of 100w amplifier in spl. So even with 50w you need 500w just to double the perceived spl. At least that's how it's been explained to me. Please correct me if I am wrong.
Power to volume is logarithmic, but not quite that much. Doubling the power is only 3dB louder. Double three times- 3, 6, 9dB- you're talking 8 times the power to go 9dB louder. The ten to one you're thinking of is probably 10dB takes ten times the power. That one is true.
Another factor is "double the perceived spl" that one is pretty subjective. 3dB is only a little louder, but a lot of people would probably agree 10dB is twice as loud. So that may also be where your 10 to 1 comes from.
Either way, based on what I am hearing from my Moabs its a slam dunk that Encores are super easy to drive and sound amazing.
@ JCARCOPO I know you like SET-300b tube amps.*LOOK*@ the pass lab's, XA25! amp,It mimics, a SET 300b tube circuit?.And yes it is *ss*..I think, the sound is not so as* tube's* or* transistor's*, but maybe the circuit? I do not have a xa25 amp.I do not know,what the amp sound's, like.My buddy say's, the midrange?. But i will be trying,one in my rig.25-watts will give me, a in room,SPL of 113 Db with 10Db peaks @ my seat @13'.Thats why, i don't,wast my time ,on high power amps.If the first watt is bad.I do not want 99- more..All so the *xa25 amp* will handel the speakers,you have,the,(ENCORES), resistance/impedance better? It runs class A @25watts.Lots of heat.Like 300b tube'sThe heat of my amps,is not a concern my amps,are in the cellar,below the speakers..Biamping the the (ENCORES) is a road to go down.
(I met nelson in 1975,at Tech Hi Fi when he was in(Providence,RI).We spoke about circuits.not tube's or transistor's.Nelson is a* thinker*His work show's that.In the 1960's jbl try it with the *T-circuit amp*.*SS* to combat the *ss* "BAD SOUND"at that time.Whats new now... .(As nelson will say, whats new under the *SUN*.
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