matthewpiano:gpi:matthewpiano:gpi:Gerrardasnails:I've heard this a well thought of amp. Anyone know how old they are and how much is a fair second hand price? I don't want to get one and it die on me a year later.
I believe you can do better than the old Pioneer A400 for about the same money or a little more. Yes it's a classic but its design is 20 years old now. Look instead at top-rated amps of the last few years: Nad C352, Rotel RA-03, Marantz PM7001, etc. Something like the Rotel will offer much more punch and joie de vivre.
The Rotel is a good call but I'd rather have the A400 than either the NAD or the Marantz. The fact that the Pioneer is a 20 year old design means nothing. Amplifiers haven't really improved in that time, and nothing I've heard below the price of a Sugden Mystro sounds more 'right' and musical than the A400. The modern budget amp that does run it close is the Rega Brio 3 - another piece of kit that performs well outside of its price bracket.
Fair enough but in terms of age, parts don't last forever and with old amps they are more susceptible to output stages failing. If the OP can find a good condition one that isn't too tired he'll be ok with the Pioneer. I have recently sold some Pioneer reference components: an M73 power amp, C73 control amp and PD73 CDP so I know it can be reliable, although I have also heard there are quite a few M73s around with one failed channel.
I do agree with that. I hope my A400 lasts a long time but if it ever breaks I'll more than likely replace it with a new Brio 3 which I then wouldn't replace until I had the money for a Sugden Mystro or A21a. I believe the output stages of the A400s can't be directly replaced with the same spec so if they ever went I don't think I'd throw money at it because I couldn't be sure that it would ever sound the same.
If the A400 does leave this mortal coil, I recommend also looking out for an Audio Innovations Alto integrated amp which has a stripped down design based on the Pioneer A400, i.e. no tone controls or balance. Look for an original model finished in matt black with the AI logo on the front and not a chrome-finished unit. Those were tweaked by Richer Sounds later on and sold with a matching CD player as a lifestyle system.