STI-1000 Overrated or not?


hi to all
i am new to this forum and would like to ask for some advice.
i have a vintage c39 and mc7106 combo which i use for 2 channel only (bridged). i wonder if anyone have heard this combo before for music only? i have just bought a w4s class d int amp (200 hrs running in)wanting to replace them but found it lacking some fullness in the sound especially in bass impact and vocals as compared to the 7106 (using the pre-out from the w4s for ab comparison). Or am i too used to the Mc sound? i know the sti needs more running in time but it should at least outgun my Mc by now. Just confused. Any comments from the experienced guys would be appreciated.

PS my system includes macmini>EE minimax as source and with Harbeth c7.
jamomanu
I may have bought my last amp, the Wyred4Sound STI-500. I burned it in with a tuner which put well over 300 hours on it. Very holographic and transparent with a very low noise floor which brings out so many little nuances and inner detail that I've never heard on very familiar recordings. Also, the bass.....my god. I NEVER had bass like this before. Deep, tight, accurate and fast. Did I say deep? I had speakers with single a 10" woofer, and two pair of speakers with DUAL 8" woofers and none of them had the bass that my current Source Techs with a SINGLE 7" woofer. Everyone has their own opinion of amps, and there is no perfect amp, but I'm extremely happy with my Wyred integrated. I've owned solid state and tubes over the years.
Have had STI 1000 for 2 years. Very pleased with it now but have had ups and downs. To me the basic amp is very neutral and benefits from cable and power cord matching to taste. I have upgraded fuses and wiring thru W4S. Varying opinions on this as some people feel stock unit is fine and this is a matter of taste(what isn't?). Appeared to add to midrange and highs. I would consider working on IC or PC or SC changes first and as needed. I wound up changing almost all of them in my particular set up. At this time use Harmonic Tech dig and IC; Lessloss, VH Audio and W4S PCs; and Audioquest SC for my particular setup. (Have other brands that work well). Also using PS Audio Power Regenerator. At this time Lessloss is going straight to PS Audio PW Dac Mk 2. I also felt break in times sometimes took longer than I imagined (patience helped). Have had many systems in my 40plus years listening and this one is very musical and pleasing.