Bought a beat-up Navy speaker LS-474/U for $10 at a local fest. Inside was toast except for a nice 600 ohm transformer. Painted outside with Rostoleum gray to match my receivers. Installed a new 6 inch 8 ohm speaker, used both front case holes for two mono jacks... one 8 ohm, other 600 ohms. Simple, looks swell, sounds good. W. Li