Up for sale is an NTP 179-170, the dual-channel 19" 1U version of NTP's 179-160 dynamics processor, made in Denmark. It combines three instruments in one: a limiter for high-level signals, a mid-range compressor/expander for the desired dynamic range, and a low-level expander to keep noise down. It is built around NTP's own high-quality VCA module, which allows extensive filtering of the control voltage. That is widely credited for its distinctive sound.

Features per channel:

• Compressor/expander mode switch
• Threshold, ratio (1.3–10), attack (ms range) and recovery time with AUTO (program-dependent) release
• Gate/low-level expander with Slow/Medium/Fast gate time
• Front-panel preset trims for limiter threshold, reference level, output level and gate function
• LED meter for gain/attenuation and limiter activity
• Hard bypass per channel

Linking and I/O:

• Stereo linking via Group A/B switches
• Rear "Control voltage grouping" connector for linking multiple units
• Balanced XLR inputs and outputs
• IEC mains inlet with 230/115 V selector

Condition: very good

The 179-170 is rarely offered and comes from the same family as the famous 179-120. It works equally well as a transparent bus compressor and as a creative expander.

Shipping: well packed, insured, from Germany. Questions welcome.