Marantz 1122DC amplifier

What is stereo?

There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.

H.H. Scott '59

Marantz 1122DC amplifier

Stereo Console Amplifier Features:

Low TIM Design

DC Amplifier

Bas, Midrange and Treble Controls

Low and High Filters

Full Complementary Direct Coupled Output

Two Tape Monitors

Tape Copy Facilities

Shown in optional walnut veneer cabinet

Technical Specifications

Amplifier Section

Rated Power Output (Min. Contiuous Average Power per Channel, both Channel Driven): 61 W (Power band: 20 Hz to 20 kHz; Total Harmonic Distortion: 0,03%; Load Impedance: 8 Ω)

Rated Power Output (Min. Contiuous Average Power per Channel, both Channel Driven): 77 W (Power band: 20 Hz to 20 kHz; Total Harmonic Distortion: 0,09%; Load Impedance: 4 Ω)

IM Distortion (IHF method, 60 Hz and 7 kHz mixed 4 : 1 rated power output)

At 8 Ω Load Impedance : 0,03%

At 4 Ω Load Impedance ; 0,09%

Damping Factor (at 20 Hz): 60

Sensitivity (at Main In): 1,5 V

Impedance (at Main In): 30 k Ω

Frequency Response (power Amp Only): 20 Hz to 20 kHz ±0,2 dB (at 1 watt output)

Signal-to-Noise Ratio (Main In "A" weighted): 110 dB

Preamplifier Section

Phono

Input Overload at 1 kHz: 200 mV

Equivalent Input Noise ("A" weighted): 0,48 µV

Dynamic Range: 109 dB

Input Sensitivity: 1,8 mV

Input Impedance: 47 k Ω

Frequency Response (RIAA 20 zh to 20 kHz): ±0,3 dB

Signal-to-Noise Ratio ("A" weighted, at rated output and 7,75 mV input): 83 dB

High Level (Aux and Tape)

Input Sensitivity: 180 mV

Input Impedance: 20 k Ω

Frequency Response (includes power amp.): 5 Hz - 60 kHz ±0,1 dB

Signal-to-Noise Ratio ("A" weighted; ref.to rated output and 775 mV input): 93 dB

Output levels

Tape Out (ref. 7,75 mV at phono input): 775 mV

Pre Out (ref. 180 mV at Aux inputs): 1,5 V

(ref. 500 mV at Aux inputs, main amp disconnected): 4,2 V

Output Impedance

Tape Out : 330 Ω

Pre Out : 220 Ω

General

Power Requirements (USA only): 120 V AC, 60 Hz

Power Consumption (at rated output, both channels operating): 250 watts

Idling Power (Volume Control at zero): 50 watts

Dimensions (W x H x D): 416 x 146 x 312 mm (16-3/8" x 5-3/4' x 12-3/8")

Weight (Unit alone): 12,5 kg (27,5 lbs)

Pagine

What is stereo?