One thing to note if using the RP7 as a pre, (from Stereophile's measurements):
" As a result of the increased output impedance at low frequencies, the RP-7's response drastically rolled off below 400Hz into 600 ohms, reaching –3dB at 200Hz (fig.1, cyan and magenta traces). The RP-7 should not be used with power amplifiers having an input impedance much below 30k ohms. Into 100k ohms, however, the RP-7 offers a flat, wide-bandwidth response with an upper –3dB frequency of 170kHz"
Keep in mind the input impedence of the power amp you will be using with it. I have an RP7 and a Stereo100 and the match is lovely, as it should be with the same brand.
" As a result of the increased output impedance at low frequencies, the RP-7's response drastically rolled off below 400Hz into 600 ohms, reaching –3dB at 200Hz (fig.1, cyan and magenta traces). The RP-7 should not be used with power amplifiers having an input impedance much below 30k ohms. Into 100k ohms, however, the RP-7 offers a flat, wide-bandwidth response with an upper –3dB frequency of 170kHz"
Keep in mind the input impedence of the power amp you will be using with it. I have an RP7 and a Stereo100 and the match is lovely, as it should be with the same brand.