Vintage Knight Model 94 SX 712 Tube Preamplifier Allied Radio Corp Audio EquipmentLodestar Auctions4.7(452)$25
Alexander Dumble | A Vintage Seeburg Tube Amplifier Owned by DumbleJulien's Auctions4.1(80)$250(3 bids)May 30, 2026
Custom Built Vintage Tube Amplifier Audio Mixer Parts Repair DIY ProjectLodestar Auctions4.7(452)$100
Vintage Grommes Tube Audio Set Pre-Amplifier Power Amplifier Tuner Hi-Fi SystemLodestar Auctions4.7(452)$600
