Te koop een kwaliteitsartikel van Telefunken. De uitvoering doet erg denken aan Aurex van Toshiba. Werkt goed, visueel een krasje op de voorzijde en wat krassen aan de bovenzijde. Liefst ophalen maar versturen is geen probleem. Kosten en risico zijn voor de koper. Van internet gekopieerd:The MA 1 was Telefunken's high-class amplifier offering in the line of Midi-sized (30x30 cm basic area) Hifi components. Compared to its size, it offers a quite respectable output power of 2x50W RMS and almost all features one would expect from an amplifier at that time, including a power level meter with selectable range. It is part of the M 1 component system, and shares the unusual housing concept: the housing is made of an inner frame, and aluminium profiles attached to it make the 'outer skin'. This housing concept is similar to laboratory devices and in contrast to standard housing concepts of Hifi devices at that time, which were based on bended metal sheets. It gives the whole system a very worthy look, and Telefunken won an industry design award for it. But even among the other M 1 components, the MA 1 looks unconventional with its exposed heatsinks on both sides.

Features
four inputs, tape copy function, loudness, tone controls may be bridged with the defeat switch, noise filter, LED level meters with selectable range, two pairs of speakers may be attached.

Connectors
Inputs for Tape/Tuner/Phono/Aux (DIN), speaker outputs (one pair DIN, one pair clamps).

Technical Data
(taken from the service manual)

Nominal Impedance:
4 Ohms
Nominal Output Power:
2 x 50 W RMS
Peak Output Power:
2 x 80 W
Distortion Factor:
0.1 % at 1 kHz (45 W/4 Ohms),
typ. < 0.5 % at 40 W/4 Ohms, 20-16000 Hz
Power Bandwidth:
< 10 Hz ... > 40 kHz for K <= 0.7 %
Phono Deemphasis:
acc. to DIN 45 547
Nominal Input Voltages/
Nominal Input Impedances/
Overdrive Reserve (4 Ohms):
180 mV / 470 kOhm / 33 dB (tape)
180 mV / 470 kOhm / 33 dB (aux)
180 mV / 470 kOhm / 33 dB (tuner)
1.6 mV / 47 kOhm / 33 dB (phono)
Output Levels at Nominal
Output Power:
1 mV/kOhm at tape input and 1 V
input voltage at aux input
14.14 V at speaker output (4 Ohms)
0.42 V at headphone output (8 Ohms)
S/N ratio acc. to DIN 45 500:
> 60 dB at tape/aux
> 60 dB at phono
Channel Separation:
> 55 dB at 1 kHz
> 40 dB at 10 kHz
Input Separation:
> 80 dB at 1 kHz
> 65 dB at 10 kHz
Tone Control:
Bass: +13 to -13 dB at 40 Hz
Treble: +11 to -11 dB at 15 kHz
Balance Control:
0 to -40 dB
Noise Filter:
7 kHz turnover frequency, 12 dB/oct.
Semiconductors:
15 integrated circuits
25 transistors
28 diodes
37 LEDs
Mains Supply:
220/110 V, 50/60 Hz
Dimensions:
298 x 114 x 250 mm