Unbelievably, the wizards at Retro Instruments have released a single-channel tube microphone preamp/ line amp module that fits into a single slot of a 500 ...

The new DoubleWide II is nearly a whole new product from California-based Retro Instruments--it's a ground-up redesign of their popular single-channel 500 series compressor that ...

Revolver is an all-tube dual channel audio compressor based on the single-channel British-modified Altec 436C compressor from the 1950's. Like the Altec, Revolver is based ...

Retro Instruments' Doublewide compressor is a single-channel tube compressor built in a two-slot 500 series module. Doublewide uses four NOS 6BJ6 pentode tubes in two ...

Retro Instruments’ OP-6 Portable Microphone Amplifier is a proper rendition of the classic portable RCA OP-6 tube microphone pre-amp that came out in the 1930s ...