Vintage Soviet Subwoofer Test Radiotehnika S50B 35GDN-1-8 (10GD-30B) 8Ohm made in USSR

Subwoofer test at frequencies Purpose: for use in closed acoustic systems of the highest and first groups of complexity as a low-frequency link for indoor operation. Specifications: Frequency range: 40 - 5000 Hz Frequency response: 14 dB Sensitivity: 84dB Working power: 25W Harmonic distortion at frequencies: 125 Hz: 7% 200 - 630 Hz: 5% 1000 - 2000 Hz: 3% Resistance: 8 ohm Nameplate power: 35 W Long-term power: 50W Short-term power: 125 W Main resonance: 30Hz (± 5Hz) Total Q factor: 1 (± 0.5) Equivalent volume: 50 l Dimensions: Ø 200x97 mm Weight: 2.1kg