Problem fixed. Bad Amp from self infliction.. New amp connected, worked as expected. Root cause was DC cord I cut from A/C adapter to make battery supply to amp was polarity from shell side and female insert was backwards to what amp polarity required. When it blew fuse on first power up...
Fade control is in middle no offset.
Power confirmed, unit does light up.
Good news on both type outputs work same time.
Will try moving to front preamps out of radio good idea.
Also if radio has equalizer built in and loud feature should those items also be turned off?
Have radio with front and back preamp outputs 2 VRMS. I have wired 2 front speakers 4 ohm units to regular radio FRONT L and R output wires, they work fine. What I am trying to accomplish is use the REAR preamp radio output RCA connects to a LEPY 12 volt mini hi fi amp using the RCA inputs...