Regarding QRV07

[goldkenn]

As quoted in The schematics section:
"..... This IC is designed to be used with low impedance signal sources ....."
If in case the source is not a line out, but a headphone out such as a MP3 player, will that let the signal direct inout to TPA6120 better then via the buffer?

[peranders]

Headphone out is typical 100 ohms and is "low" in this context.

Better with buffer? Can't tell really.

[goldkenn]

Maybe I add a selector, with buffer for line level in via RCA socket, withoput buffer, direct feed to TPA6120, as headphone in with a 3.5mm socket.

[peranders]

Notice that the input currents of the TPA6120 is around 12 uA and this may create offsets (clicks and thumps in the earphone) if the input is DC coupled.

[goldkenn]

For BR1/BR2, did MB6S work fine? I can't find DSF04 or any SMD type rectifier except MB6S

[goldkenn]

By the way, also the transformer, I found nothing from RS, did Farnell have the transformer?

[peranders]

Farnell art no 1689063