Standalone Sony Muteki amplifier as an additional passive subwoofer amp. HT-DDW5500 DDW7500 DDW8500 Recently my AV receiver Sony Muteki STR-KM7500 stopped working. It wasn’t worth fixing it, so I bought a new one. New Sony models do not have subwoofer amp, and there was no system control for the amplifier. TA-KMSW500 will not power without a master amp, so this is a solution how I fixed it. The power supply has to be started with the master amp until that doesn’t happen mains relay is off and the TA-KMSW500 doesn’t have any power that can be used. A The simple solution is to add a link and to bridge the mains relay.
On the picture is marked with red where to insert the link (removing the board is not hard). It is a simple solution, but then the amp is ON all the time.
So I used different solutions, and for that, you even don’t need to open the amp.
Sony system control is via stereo 3.5 mm jack.
Cut one USB cable, use 3.5mm plug or one of the old Audio cables with 3.5 mm jack. Connect it as on the picture.
Notice that USB red 5V wire goes to plugs ground.
A black wire which is ground goes to other two pins which are in L and R channels.
Plug the 3.5mm jack to Muteki and USB to USB on your TV or amp.
It will Power up the subwoofer amp every time the TV or main amp is switched on, and USB socket has power.
You may also want to know that one of the pins where black wire goes is load limit protection which the main amp was used to disable the subwoofer if something goes wrong.
If you find it helpful please comment, so I know it was worth writing this article.
Great thanks for this, it saved me looking for a new subwoofer amp. I can confirm soldered link working.
How did you do it
I am happy that it helped many. Thanks for the feedback.
Usb cable to jack works!! Thanks
thanks a lot mate, you are great
Thanks you did a great job man
I have one Sony HT -DDW5500 it’s subwoofer out put is very low I’m not getting enough bass please tell me a solution
Would this be the equivalent of a charge cable for an old ipod shuffle or something? Ie. Not for data transfer, but more for charging?
thank you man you are teh best
Just wired this up and can confirm it works great.. thank you so much for posting..
The usb to 3.5mm plug that is..
The USB to 3.5 mm plug worked very well . ? thanks . Saved me from buying a new subwoofer system . It now runs with new Sony STR DN 1080 which does not have a system 3.5mm jack .
Hi, can you please give me an idea about which USB cable needs to be use. USB to USB data transfer cable or USB iphone charger cable.
Any, but you need to find wires for 5V
Would the link work if I was to fit a rocker switch in between to be able to turn on and off easier
Most likely not, need 5V, maybe a small battery and resistor 10k would help.
wire>battery – , battery+, resistor 1, resistor 2, wire.
Sweet as man Thanks Heaps for this info saved me money.so u da man 👍🏼