Very Poor Bass From Panasonic RE-787 AM-FM Stereo Radio

[Gunslinger]

Have you tried different speakers?

[zeno]

Unseen & unheard....
C18 & 28 they are .2 mfd so you may need to use .22
C20, 30, 23, 33,24, 34, 25, & 35
C22 & 32 they are .1 mfd

Output uses + & - voltages. Quick check of output stage is be sure
there is no DC on speakers.
You can use your finger for a signal injector by touching the
base of transistors up to the drivers. When you get a nice loud
bassy hum you know its OK from then on.

73 Zeno

[Motorola Kid]

Thanks to all who have pitched in here! In answer to some of the posts, all of the controls, bass, treble, left and right balance, volume, and the input switching between phono, AM, FM, FM Stereo work properly with absolutely no scratchiness, popping etc. Volume is strong and undistorted up to a fairly high room (10'x12') filling level. When I turn the unit ON, there is no bass thump even with the bass pot at max. Everything seems to work very cleanly, it's just that at max setting, the bass is very weak....sounds more like the unit has only a tone control rather than dedicated separate bass and treble. Just for fun, I connected a Sony CD player that has adjustable output to the phono input and got no increase in bass performance.