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Xport is an ultra-compact balanced audio output module for eurorack synthesizer systems. The module features six channels of precise level scaling with signal and peak indicators, and ¼-inch balanced outputs for professional audio use.
- Eurorack to balanced line-level audio conversion
- Low-noise signal path with isolated channel circuitry
- Signal level and peak LED indicators per channel
- ¼-inch TRS outputs with phantom power protection
Xport is specifically designed to convert eurorack audio to professional balanced line-level signals. Balanced audio is essential in pro audio applications due to its immunity to noise introduced in long cable runs. Audio signals in this format are commonly used with pro audio interfaces, mixers, patchbays and live sound equipment.
The module’s six ¼-inch TRS jacks, OUT 1-6, output differential signals scaled to +4 dBu, which can drive long cable runs with high capacitive loads. The compact 6-channel layout is possible by using high performance balanced line driver ICs rather than much larger isolation transformers.
These differential or “balanced” signals are the key to noise rejection. Prior to signal output, a duplicate is made with an inverted polarity. Using a TRS cable, the original signal, SIGNAL +, is connected the tip (T) of the plug, while the inverted signal, SIGNAL –, is connected to the ring (R). These two signals travel on separate wires within the same cable. At the balanced input, the inverted signal is re-inverted and combined with the original signal. Because any noise picked up across the cable affects both signals equally, it undergoes phase cancellation and is removed from the FINAL SIGNAL.
Although Xport packs six channels into only 6 HP, it has been carefully designed for complete isolation of all channel circuitry to eliminate crosstalk or “bleed” between channels. Each channel circuit has its own 0 V (ground) reference running independently to the main power connector.
The six audio inputs, IN 1-6, accept eurorack level audio signals in the range of ±5 V (10 Vpp). DC-offset is removed, then the signals are buffered and scaled down before reaching the balanced line drivers.
The dynamic signal level of each channel is represented visually by the GREEN LED. The RED PK (peak) LED indicates the output signal has reached +6 dBu.