AVR Subwoofer Pre-out Boost Modification

[highdesert56]

Hey guys,

I've got a new one.  While I have this thing apart (Yamaha RX-A2070) I'd like to see if it's possible to boost the subwoofer output in the pre-out circuit.

It seems I have to turn up the output more than I should and much higher than with my previous AVR (Yamaha HTR-6090).  All tuning and crossover possibilites have been accounted for and it just seems that the sub-out is generally weak.

Any of you audio gurus feel free to peruse the included scematic and let me know if I'm crazy or just stupid.

Thank you.

[tooki]

Surely the channel level is something you can adjust in the settings??

[tooki]

Yep. P.146 in the manual: https://usa.yamaha.com/files/download/other_assets/4/957664/web_YJ291A0_EN1_RX-A3070_2070_om_UCRABGLF_En_A0.pdf#page146

[highdesert56]

Thank you for the response, sorry I wasn't clear enough.

I have to almost max out the channel level to get somewhat satisfactory performance.

The subs in question are PB16-Ultra and PB13-Ultra which took way less channel level and gain on the subs with the old receiver.

So, I wasn't sure if I could sneak a resistor or two of a different value in there to spice things up a little.