prem@allegra.UUCP (Swami Devanbu) (11/19/85)
Replace this line with your message Subject: Power amplifier questions Newsgroups: net.audio Distribution: na [ Burp! ] I have some questions about power amplifiers: a) Is there any data (or theoreritical reason) that would cause one to suspect that amplifiers with "intelligent" power supplies (NAD, Carver, Proton) would have greater tendency for Transient distortions ? b) Does bridging cause any additional problems in terms of phases being different between the two sides of an amplifier, and the different drain on the power supply ? c) Does high current capability on the output side have anything to do with anything ? d) Is this calculation correct: The slew rate for the NAD 2200 is rated at 35 V/MicroScond, or 35 megavolts/sec. for a frequency of 20 KHz: Signal: sin2PiFt, F = 20,000. Derivative: 2PiFcos2PiFt, at t=0 (crossover point), derivative =~ 125K times the signal amplitute volts/sec. So max signal amplitude, approx: 280 Volts. To deliver rated 400 W transient power into 8 ohms, needed voltage is approx 58 V. So why should I give a flying findangle to get an amp with a higher slew rate ? Assuming, of course, I was using a CD, which has lower bandwidth than an LP :->. If there is enough interest, I will repost all the answers. {ucbvax,vax135,ihnp4}!allegra!prem