The Empirical Labs EL/Rx-H DocDerr is an extremely low-noise preamp capable of working with line level or instrument level signals
The Empirical Labs EL/Rx-H DocDerr is 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 EL/Rx-H DocDerr is an extremely low-noise preamp capable of working with line level or instrument level signals, is followed by four sections of EQ combining a two position high pass filter with three parametric bands, each with its own set of carefully tuned frequency presets. An internal jumper can turn the DocDerr into an unparralled instrument preamp with 16dB of gain, ideal for acoustic guitar, bass, synths, exotic plucked instruments, etc.
The versatile EQ is followed by a unique dynamics section which offers renowned Empirical Labs compression at an unprecedented price, and an extremely musical tape emulation circuit that softens and tames high frequencies and transient spikes. We believe it’s the best single knob “knee” compression available in this format.
One of the pivotal features of the DocDerr is the “Mix” knob which allows the user to blend the uncompressed EQ’s signal with the compressed and saturated signal. This parallel compression technique, used by top recording and mixing engineers for many years unlocks a whole world of sonic possibilities.
Like all ELI 500 series modules, the EL-Rx is available with either horizontal or vertically oriented front panel configurations, and is “Linkable” for using our famous compression on stereo sources.
The DocDerr is ideal for tracking, for fine-tuning tracks during mixing, or as a killer solution for the gigging "acoustic" musician in search of studio quality tone control. It is indeed a Tone Doctor…err… DocDerr.
As far as value, it’s hard to beat 500 Series compatible modules. Their smaller physical size let you get a lot of performance out of a smaller space, they tend to cost less than their larger counterparts, and – the best part – you can customize your own combinations of them.
When ELI started making our own 500 series products, we looked at the power supplies on the market and couldn’t help but notice a need for a better single height dual module rack unit. On other single height rack units, the modules protrude from the front panel, and don’t look sturdy or attractive. Power supplies were often noisy, frequently reducing the performance of any module mounted in them. Also, only XLR ins and outs were provided to the user, limiting the device’s applications.
The Empirical Labs EL500 rack eliminates these obstacles. 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.
Whether you’re already invested in 500 series modules or they’re something you’re thinking about adding to your arsenal, the EL500 rack will make any 500 series compatible module perform ideally and interface effortlessly into just about any audio application.
Don’t forget to check out RSPE’s Rack Revolution, a virtual 500-series rack builder that lets you custom-configure the perfect 500-series lunchbox for your studio, DAW, or mobile recording rig. RSPE carries every 500-series module imaginable, including mic preamps, compressor-limiters, equalizers, and 500 power racks.
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