The EX 442 is the better amp. It can handle lower impedance loads better, has better stereo seperation and it's DC coupling should improve upon the mushy bass response of the lesser B&K amps.
I had my ST-202 Modified to have a DC Coupling cicuit,newer Risistor\Caps installed,Star Grounding and re-wiring.Plus having the BIAS turned up to run higher Class A!That is the best of it and it is a totally different Amp!Same Transistors though! He could opt to get a modified ST-202 also!
I own lot of B&K amps and preamps. ST1400 2x105rms,AV6.5.4 6x60rms,2pcs-TX4430THX 3x200rms and 2pcs-AVP300THX, all are excellent performers especially in music.I guess EX4420 dual mono would be much better choice as I enjoyed much of what I got.
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