Gain Reduction | Pro Audio Hardware Compressors and Limiters

reviews and advice on new and used hardware compressors and limiters 
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TC Electronic C300 Dual Stereo Gate / Compressor

C300 is an easy to use dual engine dynamics processor that gives you superior compression/limiting and gate/expansion feasibilities. It features flexible control of the signal path, 16 gate/expander and 16 compressor/limiter audio-optimized presets with intelligent TC multi-band and full-band technology, innovative new style compression, state-of-the-art TC quality, and an extremely intuitive and straightforward user interface that gives you access to complex and comprehensive dynamic processing with a few buttons and simple operations only.
 
C300 is mainly meant to be used in insert applications.
 
The C300 gives you source-based presets that are tailor-made for various types of sources. Depending on the preset you select you have access to intelligent TC full-band- or multi-band technology.
The C300 multi-band processing is built on a state-of-the-art TC algorithm that bases it calculations on the incoming source, and that why it called source-based. A multi-band compressor, as opposed to a full band compressor, acts differently on different frequency bands. That means that each frequency band actually has its own little compressor working on it, with unique settings like threshold, ratio, attack and release. If you for instance prefer a steep compression on the lower frequencies, a soft compression on the mid frequencies, and a bright and light compression on the higher frequencies, you should use a multi-band compressor.
 
The C300 comes with several presets that are fully optimized for this kind of compression and youl be surprised to discover just how easy multi-band compression can be.
 
Based on thoughts behind parallel compression you get a completely new approach to working with compression. Now you can take a compressed signal and mix it with a dry signal and enhance all details in the music, just by turning the mix knob. What that does to the sound is that instead of pressing down the signal peaks you preserve all the higher dynamics when you play loud, and at the same time you bring out all the details from the lower end of the signal. Try and apply parallel compression on a drum kit. Youl discover that all the lower details are smack in the face, while all the bells and high dynamics of the snare and cymbals are preserved and ncompressed so to speak. And the really cool thing about it is that the C300 makes parallel or new style compression the easiest thing in the world just select the appropriate preset, and youe up and running!
 
The entire user interface has been laid out to be simple, intuitive and straightforward. All non-essential knobs and tweaking possibilities have been cut away, and replaced with innovative combinations and expansions of parameter indicators and knobs. For instance, the gate and the compressor are both controlled with the same knob, giving you improved and much faster access to important parameters.
 
The C300 gives you highly advanced TC algorithms that will process your sound with extreme precision, ultimate audio quality and outstanding performance. State-of-the-art audio converters are built in, ensuring your passage from analog to digital and back, is in the very best quality.
 
The C300 comes with a flexible routing feature that gives you all combinations of parallel and serial link modes. Stereo serial mode allows you to process a composite full-mix signal on both engines simultaneously, virtually giving you an extra device. With the C300 you can insert a stereo full-mix signal into one engine, e.g. compress it, and then send the stereo signal into the second engine, and e.g. limit it, and then send out a processed full-mix stereo signal. What that gives you is the full use of stereo processing on two serial connected engines, something that not normally attainable in this type of dynamics processor.
 
In normal dual/mono mode youl either use one engine as a compressor and the other as a gate or both engines as compressors or gates, having two individually processed mono signals coming out from each engine. Or, youl link the two engines together, and e.g. use the first engine to compress the signal, and then the second engine as a limiter, sending out a processed mono signal.
 
Features:
 
* Dual engine compressor/limiter gate/expander
 
* 16 compressor/limiter presets and 16 gate/expander presets optimized for selectable audio sources
 
* Mix features for new style compression
 
* Intelligent TC multi-band and full-band technology
 
* Detail enhancement via new style compression
 
* Flexible routing gives you all standard combinations of link modes + a stereo serial mode that virtually gives you an extra device
 
* No nonsense user interface
 
* Comprehensive metering
 
* Optimized key filters in gate mode
 
* High quality knobs
 
Retail:
 
£120-170
 
(Getting old now)
 
Used: £90-120
 
Verdict:
 
A good first cheap compressor that was well received when it first came out. But now there are better alternatives such as the Art Pro VLA and the RNC at this price. Neither notable nor anonymous.

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Filed under  //   1U   Budget   Compressor   Gate   Multi-band   Stereo   TC Electronic  

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DBX 160A Compressor/Limiter

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.
 
The dbx® 160A is a legendary dbx® 160 family of compressor/limiters. The same classic sound, easy set-up and no compromise metering is now married to an improved signal path and stronger chassis design. The result is industry standard compressor/limiter which is digital-ready and road tough.
 
Featuring switch-selectable OverEasy® and Hard Knee compression curves along with extremely wide-ranging threshold, ratio and output controls, the dbx 160A is up to any task. True RMS level detection provides the most natural-sounding dynamics processing available, from subtle compression to "brick wall" peak limiting. Choose low ratios and OverEasy® compression to transparently smooth out fluctuating vocal and instrumental levels. Or use the 160A's Hard Knee compression and high ratios (up to and beyond :1 and over 60dB gain reduction) for bombproof protection against overload distortion in digital recording, P.A. systems and broadcast signals. The 160A is fully compatible with +4/-10dB and balanced/ unbalanced systems, and its electronically balanced output stage is an outstanding line driver for long cable runs (an output transformer is optional). The 19-segment, switchable input/ output LED metering can be easily calibrated to any operating level. 12-segment gain reduction LEDs provide precise analysis at a glance.
 
The dbx® 160A's unique "INFINITY +" inverse-compression mode actually decreases the audio output level below unity gain when the input exceeds threshold, a real lifesaver for correcting overbearing vocal choruses and controlling runaway house mix levels. A detector input can be used with an equalizer for de-essing sibilant vocals and selectively smoothing out boomy notes on acoustic guitar and bass. And two 160As can be stereo-coupled to process an entire mix or instruments mic'd in stereo, without shifting the left/right image. Its musical sound, easy operation and unequaled versatility made the original dbx® 160 a world standard. The 160A follows that tradition, while meeting the challenges of a digital world.ent in the mix, or overall characteristics of 4 independent signals or control the gain leveling on a couple of stereo pairs, the dbx 160A is for you.
 
Retail:
 
£300-400
 
Used
 
£200-£300
 
Verdict:
 
General all purpose kick and drum compressor. Valued for its "over easy" compression. Extra Notes:
 
  * OverEasy® or classic hard knee compression with dbx's® ultra-musical program dependent attack and release times
  * Compression ratio variable from 1:1 through infinity :1 to negative compression
  * Precision dual RMS LED display monitors input or putput and gain reduction over a wide range and calibrates for different operating levels
  * Over 60dB of gain reduction available
  * Exclusive Infinity+ compression allows negative compression
  * Independent balanced and unbalanced outputs can drive 600 loads to +24dBm simultaneously. New floating balanced output stage drives any load
  * Optional output transformer capable
  * Strappable with another 160A for true RMS stereo summing operation

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Filed under  //   1U   Compressor   DBX   Limiter   Mono  

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Ashly Audio Model SC-50 Peak Limiter Compressor

   

Retail:
 
$299 (a long time ago)
 
Used:
 
$200-300 but its going up.
 
Verdict:
 
Some opinion is divided but overall the users who like it have had the units for over 20 years and swear by them. The blue face is the prized ones and they have a characteristic sound and rugged build. Popular but could be getting rare.

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Filed under  //   1U   Ashly Audio   Budget   Compressor   Limiter   Mono  

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