Selling a very affordable, great unit with some high-end features built in (input impedance, compressor). Used only in the studio; has some noticeable signs of use from the previous owner (please see the pictures). Works as expected and does the job great! Selling because I'm using different preamps more often.

FROM FOCUSRITE DESCRIPTION

Platinum TwinTrak Pro | Input Impedance Setting

This setting changes the load seen by the microphone, which has an effect on the sound of the signal. Check out the article 'Microphones, preamps, and impedance' by Rob Jones to find out more.

Where you set the impedance knob will probably be different for each mic you use. Even if you only use one mic, you will probably set the impedance differently depending on what you are recording; thus the best way to set the impedance knob is to use your ears.

A general rule used to set impedance is that to get the best sound, the mic preamp input impedance should be 5 times the output impedance of the mic. This rule can be used to get a starting point for setting impedance but remember it is your ears that will tell you where to set it.

Double vision

As you might infer from the name, the 2U Twin Trak Pro is a voice channel which gives you two channels rather than one. These channels include mic/line/instrument preamps, a variable-frequency notch equaliser and an optical compressor. This is, however, only half the story, as the device also includes a monitor control section that can take the output from a stereo soundcard and feed it, via a level control, to active monitors and to a headphone mix. Furthermore, the signal being recorded can be mixed into the monitor chain for completely latency-free monitoring while overdubbing, and there's even a send/return facility that allows you to connect up that old hardware reverb unit to provide 'comfort reverb' for the musician. On top of that there's a D-A converter (24-bit, up to 96kHz) as standard that can be used to take the digital output from a soundcard as an alternative to using the analogue monitor inputs, while an optional A-D converter is available to allow the output from the Twin Trak Pro to be fed into the digital inputs of a soundcard. As the designers rightly point out, the digital I/O can also be used in conjunction with your sequencer's routing to insert the Twin Trak Pro into a track being processed, so that it functions as a 'hardware plug-in'. Having given the general overview, it's time to look at specifics. Note that both channels have exactly the same features.