Grundig SV 80
The Grundig SV 80 is a tube stereo amplifier — what German sources call a Röhren-Vollverstärker, meaning it was a full-featured integrated amplifier rather than a separate pre/power combo. It delivered 2 x 20 W sine power at 8 ohms, with speaker outputs for 4, 8, and 16 ohms, and a frequency range of 10 Hz to 100 kHz. The tube complement is well documented: a pair of ECC83s in the preamp stage, a single ECC81 for phono, four EL84 output tubes, and an EZ81 rectifier.
Input-wise, the SV 80 was generously equipped for its era: six inputs total, including two phono stages (one MM, one MC), microphone, tape, tuner, and aux. Outputs covered two pairs of speakers, headphones, and tape. Channel separation was rated at 45 dB, and distortion at 1% or less depending on the source. High Fidelity (July 1968, p.68) examined a Grundig unit of this generation and noted the built-in stylus force gauge on the tonearm was quite accurate — a detail that suggests the SV 80 was marketed as part of a complete Grundig system, though the review's specific measurements were of the turntable rather than the amplifier itself.
Documentation on this model is thin. No production years, original price, dimensions, or weight have surfaced. Two German equipment databases list the SV 80, and they disagree on two specs: the damping factor (30 vs. 40) and the MC phono input sensitivity (0.8 mV vs. 0.25 mV). Both sources agree on the core specs — power, frequency range, tube set, and channel separation — so those can be taken with reasonable confidence. The SV 80 appears to have been part of a broader Grundig tube amplifier family that also included the SV 80A, SV 100, SV 100A, SV 140, and SV 150, though the exact hierarchy between these models isn't documented.
Known specs:
- 2 x 20 W sine power at 8 ohms (4/8/16 ohm speaker outputs)
- Frequency range: 10 Hz – 100 kHz
- THD: <1% (Hifi-Winner) / 1% (Hifi-Archiv)
- Channel separation: 45 dB
- Signal-to-noise: 70 dB
- Inputs: Phono MM (3 mV), Phono MC (0.25–0.8 mV, source-dependent), Mic, Tape, Tuner, Aux (200 mV high-level)
- Tubes: ECC83 (x2), ECC81 (x1), EL84 (x4), EZ81 (x1)
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