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'20 Watters' Explained, Pre-rola 20w G12M & 25w G12H - Bygone Tones
Pre-rola 20 watt G12M & 25 watt G12H speakers explained. Pulsonic cones, voice coils. 20w G12M vs 25w G12M, and 25w G12H vs 30w G12H.