Universum System Hifi 7500 SL (V 2315) specifications

This amplifier (V 2315) is part of the Universum System Hifi 7500 SL. In addition, a tuner, a turntable and tape decks in various variants were offered in a coordinated design.

The amplifier was manufactured in two different versions at that time. The first version had a surround sound device, with the help of which a so-called "4D quadro surround sound" could be generated. In addition to the usual stereo speakers, two rear effect speakers were required for this. A later version of this amplifier no longer had this spatial sound function, instead a "mute function" was implemented in the device.

Special features of this device were its liquid-cooled power amplifier(heat-pipe), a solid front made of aluminum, as well as a comparatively flat housing design. Probably in this context there is the addition of the name "SL", which was called "Slim-Line" in the advertising for this series at that time.

Technical data:

Rated power at 1 kHz: min. 2x60 Watts at 4 ohms

Music power: min. 2x100 Watt

Total harmonic distortion at rated power: 0.5%

Intermodulation: 0.1 at full control according to DIN 45403 (250 HZ + 8 kHz, 4:1)

Loudspeaker damping factor: 20

Loudspeaker minimum impedance (connection value): 4 Ohm

Transmission range: 20 Hz to 40 kHz

Power bandwidth: 30 Hz to 40 kHz

Crosstalk attenuation between the two channels: 45 dB at 1 kHz, 35 dB from 250 to 10 000 Hz

Crosstalk attenuation between the different channels. Inputs: 55 dB at 1000 Hz, 45 dB from 250 to 10 000 Hz Synchronization of the NF part (left/right channel): less than 2 dB

External voltage distance for rated power: 74 dB

External voltage distance for 50 mW: 60 dB

Control ranges:

Height controller: + 10, - 10 dB at 10 kHz

Depth controller: + 10, - 10 dB at 100 Hz

Balance controller: - 40 dB

Input sensitivity and impedance at 1 kHz for rated power: TB/Monitor: 350 mV/500 kOhm

Magnet-TA: 3.5mV/50 kOhm

Dynam.- TA: 0.2mV/0.1kOhm

Tuner: 350 mV/500 kOhm

Max. Input Voltage:

TB/Monitor: 5 V