Restoration | Old Soviet Speaker 10ГДШ-1-4 (10ГД-36К)

In this video, I restored old Soviet speaker Romantica with 10ГДШ-1-4 (10GDSH-1-4) OR 10ГД-36К (10GD-36K). Which was a part of the "Romantica" music center which I don&have. This is the only one I have. The second one is missing. Specifications: Frequency range: 63 – 20000 Hz Sensitivity: 90 dB Sound pressure: 0.8 Pa Harmonic distortion at frequencies: 80 – 125 Hz: 8% 200 – 630 Hz: 5% 1000 – 10000 Hz: 3% Resistance: 4 ohms Nameplate power: 10 W Long-term power: 15 W Short-term power: 20 W Main resonance: 40 Hz (±8 Hz) Total quality factor: 0.6 – 1 Equivalent volume: 60 L Overall dimensions: Ø200x87 mm Weight: 1.2 kg Equipment used in video: Nikon D5500, Zoom H1