Marantz Model 30
¥ 205,000 (around 1970)
Commentary
This pre-main amplifier incorporates the latest features such as slide-type tone control.
Five ICs are used in the amplifier stage to improve long-term reliability and performance.
The tone control section uses the slide type used in professional recording consoles to improve usability. It also includes a tone control defeat switch to isolate the tone control from the circuit to obtain a flat characteristic.
Equipped with a cancelable loudness compensation control, the program source can be adjusted at low volume.
Loudness equalization is combined with volume control.
Variable overlap drive (V. O. D circuit) is mounted as a protection circuit.
This Marantz proprietary circuit uses special current control and double-transistor safety circuitry to prevent damage to transistors and speakers in the unlikely event of damage.
With a dubbing jack on the front, you can easily connect a second tape recorder or deck.
Equipped with high / low cut filters, stereo / mono mode switches, etc.
The wood case was sold separately as an option.
Model Rating
Type | Pre-main amplifier |
Continuous output | 120 Wrms (4 Ω ~ 8 Ω) 65 Wrms (16 ω, 20 Hz to 20 kHz) |
Total music power | 180W (8 ohm load, IHF) |
Harmonic distortion factor (at rated output) | 0.15% or Less (20 Hz to 20 kHz, When Both Channels Are Driven) |
Intermodulation distortion factor (at rated output) | 0.15% or Less (20 Hz to 20 kHz, When Both Channels Are Driven) |
Frequency characteristic | 20 Hz ~ 20 kHz + 0 -0.5 dB (at Rated Output) |
Input sensitivity | Phono : 1 mV (1 V output) |
Gain | Phono - Main output:60dB Phono - Rec out:40dB High level - Main output:20dB |
Volume Tracking | Within 1 dB |
Selector | 6 positions Tape Head, Phono1/2, Tuner, Aux1/2 |
Total noise (at rated output) | 1.5 μ V or Less (Phono mag input, main output, 8 Ω) |
Pwer | 95 VAC ~ 120 V, 50Hz/60Hz |
Power consumption | 160W maximum |
External dimensions | Width 391x Height 146x Depth 270 mm |
Weight | 13.6kg |
Sold Separately | Walnut Cabinet WC-1B (¥ 8,500) |