Pioneer SM-70

Commentary

An affordable power amplifier using silicon transistors.

It employs a quasi complimentary service type direct-coupled drive using a 3-fold diffused mesa silicon power transistor.

Equipped with two output terminals.
In addition, the input sensitivity can be switched to 3 positions so that it can be matched to the preamplifier to be combined.

Model Rating

Type	Stereo power amplifier
Circuit system	Net complimentary service SEPP
Music Power (IHF)	120W (4 Ω) 85W (8 Ω)
Effective power	1kHz Single channel operation : 40W/40W (4 Ω) 32W/32W (8 Ω) Both channel operation : 31W + 31W (4 Ω) 27W + 27W (8 Ω)
Harmonic distortion factor	0.5% or Less (Effective Output) 0.05% or Less (at 20W/20W Output)
Cross modulation distortion factor	0.5% or Less (Effective Output)
Output Bandwidth (IHF)	15 Hz to 60 kHz
Frequency characteristic	15 Hz ~ 60 kHz ± 0.5 dB
Input sensitivity	0.5 v, 1 v, 2 v
Load impedance	4 Ω ~ 16 Ω
Damping factor	30 or More (8 Ω, 1 kHz)
Hum, noise	100 dB or more
Power consumption	Maximum : 270W
External dimensions	Width 300x Height 118x Depth 254 mm
Weight	5.3kg