Vintage Soviet Subwoofer Radiotehnika S30 25GDN-1-4 (4ohm)

Manufacturer: PO "Radiotekhnika", Riga Purpose: for use in closed remote acoustic systems of the first and second groups of complexity as a low-frequency link when working indoors. Specifications: Frequency range: 63 - 5000 Hz Frequency response: no more than 12 dB Sensitivity: 84dB Resistance: 4 ohm Working power: 8W Nameplate power: 25 W Long-term power: 27W Short-term power: 30 W Main resonance frequency: 80 - 100 Hz Total Q factor: 0.45 (± 0.1) Equivalent volume: 11 l Weight: 1.25KG