MARANTZ PM550 ST450L SD5010 SD3020! VINTAGE STEREO TEST

SPECIFICATIONS
ST450L
Type: Mono/Stereo Tuner

Tuning Bands: FM, MW, LW

Tuning Scale: Digital

FM Tuning Range: 87.5 to 108 MHz

MW Tuning Range: 531 to 1602 kHz

LW Tuning Range: 150 to 370 kHz

Sensitivity: 0.9uV (FM), 10uV (MW), 90uV (LW)

Signal to Noise Ratio: 70dB (FM), 55dB (MW), 50dB (LW)

Distortion: 0.2% (FM), 0.3% (MW)

Selectivity: 70dB (FM), 35dB (MW)

Frequency response: 30Hz to 15kHz (FM)

Output: 700mV (FM)

Semiconductors: 7 x IC, 25 x transistors, 24 x diodes, 3 x FET

Dimensions: 416 x 73 x 194mm

Weight: 3.2kg

PM550
Power output: 65 watts per channel into 8Ω (stereo)

Frequency response: 10Hz to 50kHz

Total harmonic distortion: 0.03%

Damping factor: 80

Input sensitivity: 0.28mV (MC), 2.8mV (MM), 150mV (line)

Signal to noise ratio: 82dB (MM), 95dB (line)

Output: 410mV (line)

Speaker load impedance: 4Ω (minimum)

Semiconductors: 47 x transistors, 45 x diodes, 8 x IC

Dimensions: 416 x 117.5 x 329mm

Weight: 8kg
SD3020
Type: 2-head, single compact cassette deck

Track System: 4-track, 2-channel stereo

Tape Speed: 4.75, 9.5 cm/s

Heads: 1 x record/playback, 1 x erase

Motor: DC servo

Tape Type: type I, FeCr, CrO2, Metal

Noise Reduction: B

Frequency Response: 35Hz to 17.5kHz (Metal tape)

Signal to Noise Ratio: 64dB (dolby B)

Wow and Flutter: 0.08%

Input: 15mV (line), 0.15mV (mic)

Output: 0.65V (line)

Dimensions: 416 x 146 x 239mm

Weight: 6.6kg

Year: 1981
SD5010
Type: 2-head, single compact cassette deck

Track System: 4-track, 2-channel stereo

Tape Speed: 4.75 cm/s

Heads: 1 x record/playback, 1 x erase

Tape Type: type I, FeCr, CrO2, Metal

Noise Reduction: B

Dimensions: 416 x 302 x 73mm

Weight: 6kg

Finish: gold

Year: 1980