Insane test : Marantz Pm 6004 vs Quad 34 + 306 vs Yam AS 500 on B&W 603 floorstanding
Yam as 500 in direct comparison with pm 6004 shows more dry, although more diffuse and detailed high frequencies, similar bass punch, but more fatiguing listening overall, for me. I tested this AS 500 for a week at home , but then I changed with Marantz PM 6004 .
Yam AS 500 is a very complete amp, but doesn't meet my preferences for a warm sound with my B&W; is a beautifull vintage looking amp, with a lot of features, but no good vol and tone knobs and a delicate front plate for fingerprints when you touch ...
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Some months ago I did some measures: CD PinkF Dark Side otm - absolutely high volumes ( there were no neighbors! ) , with vol knob at 15 o'clock , (max is 17 hours) and source direct ; in the peaks I digitally tested (average) : Vmax = 14 V/ch and Imax = 1.7 A, for a maximum power of almost 25 W/ch; I generally listen to 9:30 hours max, with my wife coming & asking me for a lower volumes....I've to say that, while the Quad 34 + 306 that I owned before for 20 years , with the same B&W towers, and at a little lower volume, was going in protection (I had to unlock it using the back button) and also warmed up a bit on the smart front radiator, the Marantz instead was almost cold and never gone + in protection. The Quad was also sounding a little harsh and with harder highs, at these levels, while the Pm 6004 has retained a good liquidity on the mid & highs, which were still confortable...; anyway, in everydays normal cd listening, at 9:30, I get only an output of 1 W/ch max on peaks, more punchy bass and similar mid vs Quad!
Just a few thoughts