I have extensive experience with these receivers Having owned all of them at one time or another. Still have an SR-3A. I compared an SR4A directly with a TA4A and ended up preferering the SR. It is more detailed and open with a more refined and nuanced sound. The TA has more powerful bass and is a little more dynamic. I personally would not replace an SR with a TA but a lot would depend on the rest of your gear and your listening preferences. They are both insanely great sounding pieces and are sonically superior to many more expensive seperates and trendy integrated amps.
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