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 2275

75 Watts Minium RMS per channel, at 8 Ohms, from 20 t0 20,000 HZ, with no more than 0,25% THD
Phase-Lock-Loop FM Multiplex Demodulator
Variable Frequency Tone Control Turnover Points and Mid-Range Tone Control - separate for each channel with eleven detented positions for easily repeatable settings
Direct-Coupled (Full Complementary) Output Amplifiers
Dolby FM (75μS/25μS) De-Emphasis Switch.
Complete facilities for two Tape Recorders with the ability to "dub" from either one to the other
Front panel Tape Dubbing Jacks
Multipath/Signal Strength Meter.
 For over three years the Marantz 2270 was the standard by which all others compared their receivers. Now, its successor, the 2275 carries that comparison one step futher.  The 2275 boasts of a Phase-Lock-Loop FM Multiplex Demodulator to assure maximum separation with  a minimum of distortion. The Multipath Indicator tells you the best position of your FM antenna. The Variable Turnover Tone Controls provide a flexibility for contouring the sound that is far superior to anything previously available. Plus, there's a unique Dolby De-emphasis Switch for use with an external adaptor - to accommodate Dolby FM broadcasts. There are complete facilities for two tape recorders with the ability to "dub" from either one to the other. And the pre-out main-in jacks permit convenient use of any external device such as an equalizer or electronic cross-over. The direct-coupled full complementary amplifier output circuitry assures crystal clear highs and solid lows. The entire package is backed up with a full three year parts, labor and performance guarantee.

 A full Complement of Inputs and Outputs
In addition to the standard phono and auxiliary inputs, two sets of tape inputs and outputs are provided to facilitate copying from one tape deck to another. Front panel dubbing jacks allow you to add a third tape deck without disrupting any rear panel connections.
The preamp-out/main-in jacks on the rear panel enable you to use the preamplifier and amplifier sections independently. You get simplified connection of external components such as noise reduction systems, equalizers and electronic crossovers - and the ability to use the receiver's preamp section to drive a separate power amplifier. Here's another benefit: Connecting the preamp section directly to a tape deck enables you to make specially equalized recordings by using the preamp's flexible tone controls.


Rated Power Output:  75 Watts (Minimum Continuous Watts per Channel, Both Channels Driven)
Power Band:  20 Hz to 20 kHz
Total Harmonic Distortion:  0,2%
Load Impedance:  8 ohms
I M Distortion (IHF Method, 60 Hz and 7 kHz mixed 4:1 at Rated Power Output):  0,2%
Damping Factor (at 1 kHz):  60
Main Inputs Sensitivity/Impedance:  1,0 V/75 kΩ
Frequency Response (at 1W Output, 20 Hz to 20 kHz):  ±20 dB
Pre-Amplifier Section
Dynamic Range (Ratio of Input Overload to Equivalent Input Noise):  96 dB
Equivalent Input Noise (RMS, 20 Hz to 20 kHz):  1,5 μV
Input Sensitivity and Impedance:  1,8 mV/47 kΩ
Frequency Response (re. RIAA, 20 Hz to 20 kHz):  ±0.75 dB
High Level Inputs (Aux and Tape)
Input Sensitivity and Impedance:  180 mV/85 kΩ
Output Impedance
Tape record:  200
Pre-Out:  900
Tone Controls
Bass:  ±12 dB (50 Hz)
Mid:  ±6 dB (700 Hz)
Treble:  ±12 dB (15 kHz)
Quieting Slope (Mono) 30 dB Quieting:  1,9 μV (10,8 dBf)
5 μV (19,2 dBf) : 55 dB
10 μV (25,2 dBf) : 60 dB
50 μV (39,2 dBf) : 70 dB
1000 μV (65,2 dBf) : 72 dB
Distortion at 1000 μV (65 ,2 dBf, Mono)
100 Hz : 0,3%
1000 Hz : 0,25%
6000 Hz : 0,35%
Distortion at 1000 μV 965,2 dBF, Stereo)
100 Hz : 0,4%
1000 Hz : 0,35%
6000 Hz : 0,55%
Distortion at 50 dB Quieting (Mono and Stereo)
1000 hz : 0,6%
Hum and Ni=oise at 1000 μV (65,2 dBf)
Mono : 70 dB
Stereo : 60 dB
Frequency Response 30 Hz to 15 kHz
Mono : ±1,0 dB
Stereo : ±1,5 dB
Capture Ratio
at 100 μV (45,2 dBf) : 1,8 dB
at 1000 μV (65,2 dBf) :  1,5 dB
Alternate Channel  Selectivity:  80 dB
Spurious Response Rejection:  100 dB
Image Response Rejection:  100 dB
IF Rejection (Balanced):  100 dB
AM Suppression at 100 μV (45,2 dBf):  62 dB
Stereo Separation
100 Hz : 35 dB
1000 hz : 42 dB
10 kHz : 30 dB
Pilot (19 kHz) Rejection:  65 dB
AM usable Sensitivity:  20 μV
Dimensions (W x H x D):  17-5/16 x 5-3/8 x 14-3/8 inch
Weight:  37,9 Pounds

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