SMD TDA1541 board... "analysis"

First: No discussions about non-oversampling... Thats another playground... I do it (with JLSounds I2S board).

I fancied one of these new TDA1541 boards with all-around TPS7xxxxx V-regs.

Set it up with just some minor changes:
- NE5534 => OPA1611
- OP42 => ADA4627-1
- replaced all signal caps with WIMA MKPs (<2,5%)
- I/V resistors 1k8 => 1k3

nice crafted board all together, although there are some drawbacks:
- no i2s in-line resistors (typically 33-120Ohm)
- only coax SPDIF receiver
- gets hot, SAA7220 victim

SAA7220P/B #1988
Headphone amp is INA1620EVAL.
Beyerd. DT990PRO

Ebays TDA1387 adapter board with 4 chips sounds better than all my original TDA1541As (4pcs). That is what makes me think 😕
 

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