Should I buy a Class A Amp.
FWIW...Class A: This amp technology can best be described by saying it analyzes and amplifies the full 360 degree cycles (positive to negative) of the incoming audio waveforms in absolute real time. To be able to do that, it’s pretty much running at full power all the time. Whether the music you’re listening to is soft, loud or anywhere in between, the amp is using all of its available energy 100% of the time to reproduce it. N |
inna2,067 posts07-19-2016 7:39amWhy would class A operation make an amp slower? Is it inherent in the design? I don’t understand these things. Class A done right will not be slower, some say this, but it’s just poor design eg: power supply not being up to constant draw on it etc. And no, a proper designed Class A is more complex, re heat power supply etc. OK a bit of why I love Class A so much. I built a pure class A 150w back in the 70’s a three man lift (best amp I or anyone ever heard nothing came close to it) so easy to listen to, huge dynamics, massive sound stage, pinpoint image with depth. But the dynamics were not in a forced way that shot out from the individual drivers, but in whole envelopling way, that washed over you, with it’s bigness and dynamics But this amp had a 2 x 5kva transformers with 220,000uf capcitance per channel, 18 per channel for memory Hirel EB203 ED204 tranistors, and the big one the whole heatsink was water cooled with it’s own small radiator, variable speed radiator fan and silent water pump to keep the output transistors heat stable, This amp drove a mates double stacked quad ESL57’s with Decca Kelly ribbons from 10khz up, two x 24" Hartley woofers mounted in the back brick wall, using the next room as the speaker box. The sound was sublime. The sources were Linn LP12 Black Widow arm and a Stax electrostatic cartridge, that need to be tuned in with it’s own tube supply and scope that took 1/2hr but only stayed in tune for around 1hr before needing to be re-tuned again because humidity changes. We fed that into the amp via my first MkI Lightspeed passive pre. If you can find them the Mark Levinson ML2 monoblocks are massive but only put out 25w pure class A They will drive any nasty speaker load, but the speaker has to be reasonably high in efficiency, eg > say 88dB Cheers George |
alzo spracht nutty: " For example the no.336’s continuous output is 350 watts per channel @8ohms, 700 watts per channel @4ohms and 1400 watts @2 ohms- assuming the electrical circuit in the wall can support these extraordinary power levels. A "continuous" 2ohm test of the no.336 at maximum power would require 50 amperes at 120v. " If you're a drivin' that there amp from a 20A line source, you ain't a gunuh make that there amp draw no 50 amps. Caint do et. Caint take what aint there. Dont matur what kinda cabuls you're a usin. If you're a using a standurd 15-5R wall plug, you aint a pullun no 50 amps Just what kinduh fulz duz you thenk we ar? Sum uf us are enjuneres. |
I have a pass 30.5 class A......just put up my new Martin Logan 60 XT speakers.....need more burn in time 4 speakers......but everything is starting to open up..... but I guess what I am trying to say is if you sat n listened to a pass class A amp you would love it..... PassLabs makes great sounding equipment built 2 last..... n everyone I know or who reviewed pass amps has said there class A amps our there best amps....................... and they make some of the best amps out there.....n remember pass is one of the few high end company's still owned by its maker....like Mc intosh--- Marantz--- Mark Levinson etc...used 2 be.......check out Reno HiFI....mark will let you demo one...... Good Luck.....henry. |
