The Sanyo M-X960K SuperWoofer featured:
Controls for:
- SUPER WOOFER VOLUME
- BASS
- TREBLE
- BALANCE
- VOLUME
- DOLBY NR
- TAPE-NORMAL/CrO2/METAL
- FUNCTION-TAPE/RADIO/PHONO LINE IN
- MODE-MONO/STEREO/EXPAND
- BAND-FM AFC/FM/MW/AM/SW1/SW2
- AMSS
- ROGRAM,
- REC MODE
- REC LEVEL
- MIXING MIC VOLUME
- PITCH CONTROL
As Well as:
- LINE IN/PHONO SWITCH
- L/R LINE IN/PHONO
- L/R LINE OUT
- L/R MIC
- L/R EXT SP
- BEAT CANCEL 1/2.
- 110-127/200-220/230-240V
- 24 inches long and 14.5 inches high
Recent sales in 2019 have been from $300 to $850.
I have one of these right now. Its still in mint condition. Truly a time machine from a great era.