The MTR DI-2 is a two channel version in the same sized box, for use with stereo signals from keyboards, synths, laptops, etc. or two separate mono signals. It can also be used as a balanced signal splitter by connecting a short jack-to-jack lead from the link socket of channel 1 to the input of channel 2. Channel 1’s signal will then be available on both balanced XLR’s, and channel 2’s link socket. The attenuation switches remain working independently.
Importantly, the DI-2 active electronics have a purely resistive high input impedance, and so do not colour the sound. It can be powered in 3 ways: by a 9 volt battery, phantom power from the desk (or an MTR PPS-48), or an external 9v regulated power supply.
Most people will be familiar with Direct Injection (DI) boxes, which take a signal from an instrument such as guitar, bass, keyboard etc. and, by presenting a very high impedance to the instrument and balancing the output, prepares it for direct connection without level or frequency loss to a mixing console in the studio, or live on stage. Quality direct boxes can be hard to find in today’s disposable marketplace but MTR’s offerings bucks the trend, with many examples of 20 to 25 year old DI’s still providing excellent service.
The main features of the MTR DI-2 include:
• Freqency Response: 20Hz-20kHz ±3dB.
• Distortion: (THD) < 0.005% at 1kHz, 0dBu
• Output Noise: <-100dB unweighted
• In/Link Impedance: 1MOhm, jack.
• Output Impedance: 600 Ohms balanced XLR.
• Attenuation Switch: -40, -20, 0dB.
• Ground Switch: Lifted/connected.
• DC Input: 9vDC, 100mA, centre pin negative.
Added by: James Crofts
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