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Krell FPB-600 or FPB-700cx - RCA vs. XLR Input

Hi,

I am looking to buy a used FPB-600 or FPB-700cx amp. I am wondering if I should stick with the FPB-600 because I will be using RCA inputs. I know there are adapters to convert to XLR, but is that a good idea? Isn't there an impedance mismatch or signal level issue? If that is the case, I would not be able to get the FPB-700cx to unleash it's full potential? One thing I will not do is buy a preamp with balanced or CAST outputs. Thanks for any knowledge on this!
hi_power
hi_power OP
3 posts
 
Microstrip,

I was also talking with Larry at High End Palace and he thought using the RCA to XLR cables would not be so bad. That's good. It leaves me with more options.
dave_b's avatar
dave_b
3,159 posts
 
Owned many Krell amps including the 600. Use balanced connections for the best sound. Do not use coupling cap's unless you wish to destroy the sound...only very tweaky single ended tube preamps would be a problem anyway. The KCT is the best match or ARC if tubes are your thing. The FPB 600 was/is a great amp and sounds way better than the Evolution crap I owned and sold!
jodans318
2 posts
 
I own a fpb-600 for years now . What goes bad in a amp like this.
mrvordo's avatar
mrvordo
151 posts
 
Usually the capacitors. But other things can happen. Capacitor age and eventually fail.

Good listening,
Mike
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