Focusrite Pro, the company's professional and commercial division, meets the demands of recording, post-production, live sound and broadcast professionals. It consists of RedNet, a fully modular audio-over-IP solution, and the Red range, Focusrite's flagship multi-format interfaces, along with the heritage ISA range of microphone preamplifiers 5. Plug in the 10-way cable to J3 (Penta/Trak Master), J4 (TwinTrak Pro - on rear PCB) or J8 (Voicemaster Pro - on rear PCB) on the main circuit board, and finally remove the adhesive tape from the base of the module. - For use with Penta, links J3, J4, J5 and J6 should be left fitted, as supplied from factory. Pro/TwinTrak Pro, remove links J3, J4, J5 and J6. Selecting for Professional or Consumer Use This link determines the SPDIF output level for use with various Professional and Consumer products. Please consult your recording product/soundcard manual to determine which setting is appropriate for your system. Overview -. Focusrite MH443 TwinTrak Pro Platimun Series 2-Channel Preamp/Compressor. Designed principally as an affordable, high-specification dual mono/stereo tracking device, TT Pro (as it's affectionately known) also boasts comprehensive latency-free monitoring, unmatched digital connectivity, and all within a sturdy 2U 19" rack-mount chassis.