Thanks a lot for all the replies. As for the input inpendance match, I believe my 302 amp is either 32k or 40k ohm. Does it mean that most of the modern preamps (tube or SS) should be able to match the 302??
Just noticed that some pre-amps are "DC coupled", such as the EC-4.7 from electrocompaniet . What's the advantages and disadvantages of using the DC coupled pre? Is there any concern of using this type of pre's with rowland gears?
Thanks Raquel for your detailed explanation on impedance matching, it really helped me a lot.
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