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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
richard_stacy
686 posts
 
i meant the 600 has xlr, rca and cast...
richard_stacy
686 posts
 
lets try this all over. i was talking to my wife on the phone and eating a bowl of soup when i typed my response...

what i was trying to say was the fpb600c has xlr, rca and cast. i thought the fpb600 had xlr and rca, just no cast and it was the older style.

i use an fpb600c now although i just listed it for sale. i absolutely love the fpb sound and actually prefer it to the outrageously expensive evo's...
hi_power OP
3 posts
 
Thanks Richard. I just am not sure if I should go from RCA to XLR on the 700cx. That is my dilemma. I would also like to see a picture of the 700cx guts. I can't find it on the web. The inside of the 600 is impressive.
stevecham
3,340 posts
 
One thing I will not do is buy a preamp with balanced or CAST outputs.

Clearly the 700cx is not for you; in order to obtain all the benefits of this amp you would need to do just that, especially CAST, otherwise you are wasting your money.
hi_power OP
3 posts
 
[Clearly the 700cx is not for you; in order to obtain all the benefits of this amp you would need to do just that, especially CAST, otherwise you are wasting your money.]

Stevecham - That's what I was wondering. If the preamp signals aren't matched properly, you can lose an awful lot from the amp. I wouldn't want to spend that much and have THAT happen.
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