Empirical Labs RX-PLUS

RX Plus 1x EL/Rx-H DocDerr 500 Series Multi-Purpose Tone Enhancement Module in 1RU EL500 Horizontal Rack

OUR PART #:  RX-PLUS Write the First Review.

Our Price: $1,299.00
List Price: $1,429.00
You save 9%!
One of the newer members of the Empirical Labs family is the DocDerr...
Learn More
Price-Matching Symbol. Low Price Guaranteed Free Shipping Available FREE Shipping
Usually ships in 6-10 business days.
Need it sooner? Call us!
Pro Buyer Card
Deferred Interest if paid in full within 6 months * Learn More

Related Products

One of the newer members of the Empirical Labs family is the DocDerr, a 500 series multi-purpose tone enhancement module that houses six different sections of digitally controlled analog processing. With over two years of meticulous development and testing behind it, the DocDerr provides an unprecedented combination of power and musicality in a compact, easy to use format. Empirical Labs' first compressor in the API 500 format.

The Empirical Labs EL500 rack eliminates obstacles such as noisy power supplies, XLR-only I/O, and protruding modules. At the heart of the unit is a super quiet power supply - over 30 dB quieter than some supplies we’ve seen - that will ensure optimal performance from any compatible device.

All 500 series modules will flush mount cleanly in the EL500, providing a much more professional look and feel. The EL500 offers both XLR and phone rear panel inputs and outputs to allow it to interface perfectly with any system.

In addition, a ¼” instrument preamp/direct box input is provided on the front panel, which will automatically switch the left 500 module’s input to this front phone jack once something is plugged into it – a feature we’re sure will prove to be extremely useful. In fact, it has become the first call bass DI for many engineers. Switches to link compressors and engage a 48V phantom supply are also provided.


  • DocDerr
    • Six digitally controlled sections of analog processing
    • Frequency response - 3 Hz to 180 kHz on eq section (-3dB points).
    • Dynamic range - 120 dB from maximum output (.5%THD soft clipping) to minimum output. Noise floor with Mix on 0 istypically – 91dBu.
    • Distortion range - between .0006% and 10% at 1KHz, depending on mode and settings.
    • Maximum Input before hard clipping - +22dBm, “ Line In”mode. Maximum Output (Mix at 0) - +28.5dBm
    • Compressor Dynamics Time Constants - Attack time is around 1mS. Release .2 sec, fixed internally. Stereo Linkable for stereo tracks. With the EL500 powered rack, the push of a button enables linking.
    • Input Impedance - 120k Ohm, Instrument In Mode, output impedance isless than 75 ohms. 20K input impedance in balanced Line in mode.
    • Guitar adaptor cable included

To be the first to review this item, click here.

Add to Cart

We're sorry, only of this item available

Call a Sales Pro at 800-356-5844 for more information