SP-1: Spectrum (19980-1981)
Owner's Manual: https://www.boss.info/us/support/manual_archive/#:~:text=70%20Owner%E2%80%99s%20Manual-,S,-SD%2D2%20Owner%E2%80%99s
Power:
Battery 9V (1)
AC Adaptor: ACA-100/120/230/240 (Option)
Current Draw:
DC 9V, 3.5mA
Control:
Spectrum (500Hz - 5KHz continuous)
Balance
Others:
Normal/Effect Changeover Switch (FET Switching System)
Battery Check Lamp (Also confirmation of Normal/Effect changeover)
Jacks:
Input
Output
AC Adaptor
S/N Ratio:
Over 80dB
Input Impedance:
220k Ohms
Output Load Impedance:
Over 600K Ohms
Dimensions:
70(W) x 55(H) x 125(D) mm
2-3/4(W) x 2-3/16(H) x 4-15/16(D) inches
Weight:
400g (0.88lbs.)
* Specifications are subject to change without notice.