absolutely NO BLUETOOTH ; very good with 2.1 for subwoofer with op amp interchangeable; better components. if you do so it will be snapped up !!!Which functions do you hope to add on A07?
1. Fiber coaxial
2. Bluetooth
3. 2.1CH
4. PC USB
5. PFFB
6. Change a better OP chip
7. Another (Fill in the comments)
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@AIYIMA I think that most of us want just a quality power amplifier (maybe with adjustable gain/volume). All other functions (digital inputs, bluetooth, remote control) can be had with a variety of dacs.To summarize,
These items are requsted by several of us, with no one suggesting you avoid:
PFFB
Built-in (or sold with) power supply
Improved components (especially op amps)
Clearer documentation of performance specs
These have also been requested without other requests to avoid, but by fewer (or just one) of us:
Ability to bypass the volume control
Pass through
12 volt trigger
Remote control
Balanced inputs
Nicer looking case
Adjustable input gain
Banana plug outputs
These may appeal to some but would also turn others off:
Digital inputs (including bluetooth)
Sub out
No volume control at all
If I was you I'd be looking to implement something with just those first four and maybe 1 or 2 from the second group. You'd sell a lot of those, especially if you get it out soon.
If you also want to make something more multipurpose with a sub channel and digital inputs make it a separate product rather than trying to turn the A07 into something else.