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phase linear amplifiers

back in the early 70's I bought a phase linear 400 amp. never will buy phase linear again. in 2000. it fried 3 of my speakers. later on I read they they were known to do this. they were  cheap money for the big watts but were not well designed well to work under stress. I have McIntosh now. no worrys!
g_nakamoto
dracule1
1,085 posts
 
Wait a second.  You had the amp since 1973 and never bothered to service them for 27 years (eg, at minimum recapping). Now your complaining the amp failed?  The fault is on you and not the amplifier. Why would you post something that happened to you in 17 years ago? And why would you compare an affordable no longer in production SS amp to a pricey macintosh?  I don't get the point of your post.
g_nakamoto's avatar
g_nakamoto OP
348 posts
 
i've had it for that long and maybe you're right about having it serviced. but i've never had any issues with it until it fried my speakers with "dc" current" and there was no warning.
billstevenson
658 posts
 
This thread has no merit.
davehrab's avatar
davehrab
380 posts
 
but i've never had any issues with it until it fried my speakers with "dc" current" and there was no warning

Servicing the amp wouldn't have helped protect your speakers from the DC that blew them ... all the Phase Linear 400 .. D500 and 700 series amps are direct coupled with no coupling capacitors at the output to block the DC from reaching your speakers

One of your upstream components leaked some DC out of their outputs  and the amp simply accepted it .. amplified it ..  and sent it to the speakers which couldn't handle the DC

All these amps also have 8A fused speaker outputs in the event of an internal short

Wasn't the amps fault .. it was only functioning as designed .. it was something upstream


hiend2's avatar
hiend2
482 posts
 
Had the Ol 700B  and drove it pretty good, used to build up a lot of heat.
Nice amp..My first power amp, Later on got another 700 series 2 with tha leds  Still nice   They clip at 625 a channel
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