Half rack mono compressor/limiter, using electro-optical attenuation. Can be linked with another for stereo operation. Adjustable threshold and ratios, attack/release settings are dependent on the waveform and the amount of gain reduction. Designed to respond to RMS measurement of signal levels, arguably the least intrusive method of automatic volume control. This makes it more 'musical' than units designed primarily to protect against overloads. Silver faced use 4136 op amps. Small, unfussy and smooth.
Since its introduction in the mid 1970's, the dbx 160 series has been the world's most popular line of audio compressors. After the classic 160 (which is still used daily in many world class studios), came the 165, the 160X and the 160XT. The 160X/XT were the models that truly became the industry standard. Solid construction, fool proof operation, great sound, at-a-glance metering and a bulletproof output stage all contributed to its popularity with musicians, recording studios, consultants and installers, and broadcast media production people alike.