Interesting but the Amazon ad says 3.5 watts. How did you get the 7 watts?
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The APPJ is very responsive to tube rolling, not only the 12ax7 but the el84s as well. I use it with large two-way speakers (91db) that have simple crossovers and a benign impedance curve: the sound is great but I am tempted to make some single driver boxes at some stage and see what happens. They are technically a single ended pentode design. I read about someone who modified it to run in triode with good results, but then you're looking at 1.75 watts per channel.
i assumed they were set. are you certain of this? either way try the single driver approach, check out common sense site the owner is extremely helpful and they give you free plans and choices of many brands. for the money it is crazy excellent sound. the newer classic 8's are cast aluminum and rate at 95-96 db and i can state they are not highbaling you as the tiny amp is never close to half way up. no whizzer cone in these and you wonder why tweeters were even invented when you hear these drivers. changed my mind about stereos all together and the whole system is so small and elegant i feel like i have a secret almost
Yeah pretty sure it's pentode. Nothing wrong with that in my books, I like the speed/transparency/drama. Those audio nirvana full rangers look really interesting. I know what you mean about being in on a secret. I've only spent $1500 on my current system and it's hitting 90% of what's possible. Went through about six or seven amps over the last seven years and was never happy until the yaqin/appj combo with nos tubes.
i admit when i saw freq curve i was worried about mids but in playing them i find them very smooth. i know this is subjective but... they are very revealing speakers and any average cd i play is not helped by these drivers but on good ones they are about as 'refined' as i could imagine. in a ported box they are very detailed and not boomy but very real in every way. these things POP! lke no other in this $ range and the 8 delivrs cymbals transients like the finest small tweeters. i love piano jazz and i could not imagine a finer reproduction except when my mom, an excellent pianist with masters from Ind. Uni., sits down at the baby grand in the room and plays along so i get a good a/b comp. in listening to them the real words to describe them are more like 'realistic' than refined or smooth. they reveal sound as it is from an instrument, not coloration or interpretation. i hate using words like this but you aren't here so....
How do you find the Classic 8s in terms of smoothness/refinement?... after a little more breakin i will say this. these spkrs. def push trumpets into room like a force! some might consider this too screachy or overly emphasised but to me it sounds like it should. when i see a gig band and four trumpets belt out some shouts i do jump up a tad. so i guess this would not be how some do not like music on a stereo but i prefer it as to me it sounds more organic like a real performance up close in a small place.not a concert hall 20 rows back or in the mezzanine. my room also is brighter than t should be so this adds to that. hooked up a 10wpc oning t chip amp for kicks..man does that make them dynamic! i think those tri path amps are gonna change stereo amps eventually. jmo