tfpro 538 Version 5

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The ‘538’ is designed for creative compression effects that are difficult to achieve with plug-ins. It’s capable of extreme compression just as Ted’s original JoeMeek SC2 V5; drum sounds to die for! It’s also a super-quality ‘Levelling Amplifier’ with the sparkle of a well-designed opto compressor.

The ‘538’ occupies two spaces in a standard API 500 series rack, the new V5 version fits any 500 series rack unit, it uses two edge connectors, the first for ‘left’ and the second for ‘right’.

Inputs and Outputs

Left and Right balanced or unbalanced via 500 series frame.


Optical compression using historic opto cells from Ted Fletcher’s personal stock.

Variable ratio from 1.5:1 up to 20:1, variable attack and decay plus a ‘dark’ mode.

Switchable hard-wired (relay) by-pass.


Variable width control from full ‘mono’ via true L/R stereo up to 150% stereo width.


Easy-to-read analogue meter reading audio (VU) or compression depth (comp).

The new version is in production now! See sales page to order!

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