Pioneer CT-606

Specs
2 heads (R/P: Permalloy Solid, E: ferrite),
1 electronically-controlled DC motor,

3 digit linear counter,

Dolby NR,

L+R mic in,

Nippon Chemicon SL / LR, Sanyo, Panasonic components,

No 30-14000 Hz (40-13000 ±3 dB),
CrO2 30-17000 Hz (40-15000 ±3 dB),
S/N 54 dB (Dolby off), 64 dB (Dolby on, 5 kHz), 68 dB (CrO2, Dolby on, 5 kHz),

W&F (wrms) 0,06%,
mm 420x151x323, kg 7,5.

Pioneer SA-506

Specs

2x25W@8Ω/20-20000Hz,

2x2 Nec B616A D586A power transistors,
2x8000µF Nichicon filter caps,
Nichicon, Nippon Chemicon SL / LR, Panasonic BP components,

41 steps volume pot,

phono mm,

mm 420x147x261, kg 5,9.

Marantz PM 550DC

Specs

2x65W@8Ω/1kHz,

2x2 Nec A1141 C2681 power transistors,
2x6800µF Marcon filter caps,
Panasonic CE, Nippon Chemicon SM components,

5 band graphic eq,

phono mm/mc, 

mm 416x118x329, kg 8,0.