Aphex Compellor (B Stock)


Out of stock

Email me when in stock


B Stock:  See Condition tab for more information on this item

Sold as seen, no returns on B Stock items

Aphex carved a niche in the signal processing market, first with the Aural Exciter, then with a series of superb levelling / compressor units including the Compellor. These are super-transparent units with no discernible “sound” and they use proprietary Aphex algorithms to determine attack & release times and to hold gain reduction when required. These were popular in American broadcast setups and many sat in racks for ten years or more controlling levels to the transmitter

Compellor controls are not like those on an ordinary compressor. The Drive and Output controls are detented and offer a way to alter the amount of processing whilst keeping the output at the same level. Process Balance moves the system between Levelling and Compression and there’s a slow / fast rate switch to alter the time constants. The two processes can be stereo linked. There’s a stereo enhancer and predictably, from a broadcast-oriented company like Aphex, it has perfect mono compatibility and there are no odd phase changes going on

In a studio setting the Compellor is confusing at first – it’s often difficult to hear it in operation but a quick flick of the process in/out switches makes you realise what it’s doing. It’s not a “grabby” unit that imposes its own sound on the signal, it’s more of a “glue” compressor, better suited to buss compression than drum tracks. On a bluesy song with a very sparse intro, I found the Compellor would pull things together nicely without killing everything when the drums kicked in. So it’s not an instant attitude box like a Valley People Dynamite, nor punchy like an SSL buss compressor, but it’s a tool to glue things together. I’d like to try it in series with an SSL compressor

Inputs and outputs are balanced on XLRs. There is a rotary switch per-channel to set the operating level (-10, +4 and +8), an RJ11 connector for remote switching and a switchable 600 Ohm terminator. Mains is switchable 110 / 220 Volts and uses a standard IEC mains plug. I can supply a mains lead if required

Standard 19" 1U device suitable for all 19" racks. 220-240 Volt & standard IEC power socket

Product info


Owner's manual





Power supply missing. Four control knobs & two knob caps missing. Two bent pot shafts. Cosmetically OK. Electronics not tested. Good for parts only

Photos do not show the Compellor for sale - they show a unit sold previously

Serial AXC3208

B Stock items are sold as-seen with no returns. They have been tested, and a brief description of the faults or damage is given, but they may have other faults and may not test the same in future