Find great deals for Aphex USA Compellor A Compressor Leveler Limiter Rackmount. Shop with confidence on eBay!. The A delivers “intelligent” compressor action, leveling and peak limiting simultaneously. It can be used to solve audio level problems and improve audio. Great comressor/limiter unit, works well in the studio and live. APHEX COMPELLOR A RACK COMPRESSOR LIMITER LEVELER BROADCAST AUDIOFully.

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Extremely easy to operate, the user only needs to set the Drive level to generate the desired amount of processing, set the Process Balance control between Leveling and Compression and adjust the Output level for unity gain. Compelkor can also take a sloppy instrumental or vocal track and regulate it all to the same level.

Not specified by manufacturer. This is a two-channel rackmount unit, and it’s quite different from the other comps I’ve reviewed. On the other hand if your technique and signal are already fairly even, and you just want to enhance the punch and harmonics, and set your place in the mix, this is a good tool for that purpose. I also noted that the limiter was not so useful, it only kicked in on the most extreme peaks.

See any errors on this page? It doesn’t generate any noise of its own, although like all compressors it can amplify existing noise at higher settings. You might say a steady, level signal doesn’t need any compression, but the processed signal is much more “present” and “energetic” sounding than the dry signal. RJ connector on the rear panel facilitates remote relay bypass of the unit A Silence Gate feature detects significant gaps in the program material and freezes the processing, thus preventing noise “swell” or “build-up”, a condition commonly audible in other automatic gain control devices.

Aphex builds products that last and last without need for repairs or calibration.

Aphex Compellor 320a Dual Compressor Limiter Expander

No other product can match the performance of the D. Playing irregularly–a few notes, then a rest, then a few more notes–also comoellor the automatic sensors to work overtime, which resulted in audible artifacts. Enter new zip code to refresh estimated delivery time. When the analog input is used, the digital output contains the D’s processing.


Copying is prohibited, but please feel free to link to this page using the link text “compressor reviews”. Extensive compressor reviews and FAQ. Its unique circuit design actually enhances transient qualities, thus making even heavy processing undetectable.

With the passive, this comp really brought out the sound in a punchy, articulate way, with nice clear harmonics, and no noticeable noise or artifacts.

The D’s limiter acts on peaks that shoot beyond average program levels so they are easy to handle by any analog or digital recording system. You don’t hear pumping or other audio artifacts, just natural sound that is evenly consistent in loudness.

It combines compression, limiting, leveling, and gating, and those functions are all controlled in an interconnected way by an automatic “program adaptive” system.

Aphex USA Compellor 320A Compressor Leveler Limiter Rackmount

The A is then ready to provide complete dynamic control – smooth, inaudible compression, increased system gain, desired program density and the freedom from constant “gain riding” – all performed automatically. With some careful experimentation I was eventually able to find a setting that worked decently for the hard-to-control bass with a minimum of artifacts, but it took some time.

The A provides the option of Dual Mono or Stereo operation. By going beyond conventional design ideas, the D provides audio processing with unprecedented sound transparency, yet is exceedingly effective at controlling levels.

Overview Tech Specs Gallery Downloads. When you listen, you know the levels are made more even, but you don’t perceive the levels are shifting. With the active, the automatic levelling functions were trying so hard to regulate the signal that the noise level would jump up and down, and playing that B string hard caused a lot of distortion.

The tone is completely transparent. In Stereo mode, the user can choose between linking only the leveling control signals or linking both the compression and leveling signals. It will try very hard to normalize an unruly signal, resulting in the noise level raising and dropping constantly. It can be used to solve audio level problems and improve audio signals in the broadcast or recording studio, tape duplication house, film-dubbing studio or in live sound applications.


There is no rolloff of the lows, and the highs only roll off a bit at the highest compression settings. No Longer Available Update Location close. The patented technologies within the D are totally unique. Write a review fvzqbyxqudwyaxxu. I used it with two basses: So it’s ideally suited to broadcast work.

Whereas with the more even-output bass, with steadier playing, it was fairly easy to find a clean, natural-sounding, noiseless setting. The stated purpose of this processor is to normalize match the output levels of low-level and high-level incoming signals. Be the first to review this item. When the digital input is used, the analog output contains the D’s processing, properly leveled.

D Compellor | Products for Professional Audio, Recording, Broadcast, Audio Applications | Aphex

The D’s Frequency Discriminate Leveler section, with the Dynamic Verification Gate and the Compelllor Gate, slowly adjusts cojpellor volume level of an audio stream with very complex algorithms that hide its work.

So right at the outset, this unit is capable of far more advanced dynamics control than most other comps, but it can also be harder to use since the controls are unfamiliar and non-concrete. Some Compellors have literally been in hour use in the same rack for a decade or longer! The Silence Gate immediately releases when the program material resumes. In mono mode, unit provides two completely independent channels of processing.

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It works differently at different frequencies and stops processing when the sound stops, then resumes instantly when the sound reappears, so there’s no distracting increases in program background noise.