Output module including metering, limiting, and output balancing.

Variable optical (vactrol) limiter, post-limit output-level metering in dBU, output level control, and balanced output on 1/4" TRS jack.

Balanced output uses two NE5532 Opamps and 0.1% resistors.
Output Impedance: 470 Ω
THD + N (20Hz – 20kHz): < 0.05% typ
Noise Floor (A-weighted): -95dB

http://pulplogic.com/product/entry-point-copy/