EMPIRICAL LABS DocDerr ELRX-H - 500 Series - Multi-Purpose Tone Module (Horizontal Version)
SKU: 78697978297

EMPIRICAL LABS DocDerr ELRX-H - 500 Series - Multi-Purpose Tone Module (Horizontal Version)

Sale price$64734.75 Regular price$71927.50
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Description

EMPIRICAL LABS DocDerr ELRX-H - 500 Series - Multi-Purpose Tone Module (Horizontal Version)Six Sections of Processing 3x Parametric Bands of EQ 1x High Pass Filter Aggressive Compressor Circuit Mix Knob Blends Compressor w Dry Signal Musically Saturates Like Analog Tape EL500 Rack w Super Quiet 16V Supply Stereo Link Switch Built In Instrument Input D. I. Hand Built and Calibrated in the USA The DocDerr ELRX H from Empirical Labs is a horizontal multi purpose tone enhancement module that houses six different sections of digitally controlled

  • Six Sections of Processing
  • 3x Parametric Bands of EQ
  • 1x High Pass Filter
  • Aggressive Compressor Circuit
  • Mix Knob Blends Compressor w/ Dry Signal
  • Musically Saturates Like Analog Tape
  • EL500 Rack w/ Super Quiet 16V Supply
  • Stereo Link Switch
  • Built-In Instrument Input D.I.
  • Hand-Built and Calibrated in the USA

The DocDerr ELRX-H from Empirical Labs is a horizontal multi-purpose tone enhancement module that houses six different sections of digitally controlled analog processing�and designed for any API 500- Series enclosure. The DocDerr features a low-noise preamp capable of working with line level or instrument level signals, 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 unparalleled instrument preamp with 16 dB of gain, great for acoustic guitar, bass, synths, exotic plucked instruments, and more.

The EQ is followed by a dynamics section which offers compression and a musical tape emulation circuit that softens and tames high frequencies and transient spikes. The DocDerr features the Mix knob, which allows the user to blend the uncompressed EQ's signal with the compressed and saturated signal. The DocDerr is great for tracking, fine-tuning tracks during mixing, and studio quality tone control.

DocDerr Module

Low noise line input, or instrument preamp, with compression and six digitally controlled analog sections of processing
Four sections of equalization including one high pass and three parametric bands
Complex compressor envelope generator that is fast, yet musically saturates at high gain reduction and features a program dependent release
Saturation circuitry that scrunches the highs, allows hotter levels, and uses filtering combined with germanium clip circuitry to soften loud high frequencies
Mix control to allow user to blend an uncompressed equalized signal back in with the compressed saturated signal (when on 0, only the equalized signal is put out)
DC coupled input and outputs
Selectable single ended or differential output (adds 6 dB gain)
Traditional and digitally controlled analog
Hard clip indicator lights illuminate when the sound level is within 1 dB of hard clipping and monitors many sections for internal clipping
All metal film and Roederstein resistors in the audio path
UPC: 854682006115
In the Box
EMPIRICAL LABS DocDerr ELRX-H - 500 Series - Multi-Purpose Tone Module (Horizontal Version)
  • Limited 3-Year Warranty
Frequency Response 3 Hz to 180 kHz on EQ section (-3 dB points)
Dynamic Range -120 dB from maximum output (0.5% THD soft clipping) to minimum output, noise floor typically -91 dBu
Distortion Range 0.0006 and 12% at 1 kHz
Outputs DC coupled
Input Impedance 120 kOhms in instrument mode, 20 kOhms in balanced line in mode
Output Impedance 75 ohms
Maximum Output +28 dBm
Maximum Input Before Clipping +22 dBm, line in mode
Attack Time 1 mS
Release Time 0.2 seconds, program dependent, fixed internally
Power Consumption Typical: 2 W
Maximum: 4 W
Power Supplies 16 V
All product and company names are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 78697978297

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★★★★★ 5
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Great seeds, good germination.
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Reviewed in the United States on May 23, 2026
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Excellent Dahlia Seeds — Huge Difference in Quality
Size: 1-Pack, Style: Zinnia Dahlia, Size: 1-Pack, Style: Zinnia Dahlia
Excellent germination rate and very fast growth! I planted these seeds side-by-side with another Dahlia seed packet from a different seller on the exact same day under identical conditions, and the difference has been amazing. By day 23, these seedlings were already thriving — healthy, vibrant, and growing quickly with a very high germination rate. The plants look strong and vigorous, and I’m extremely impressed with the quality of the seeds. If you’re looking for Dahlia seeds that actually perform well and establish quickly, I would absolutely recommend these. I’m excited to see them continue growing and blooming
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Lillian DuBois
Phoenix, US
★★★★★ 5
Zinnia flower seeds are great
Size: 1-Pack, Style: Zinnia Dahlia
I love the seeds there sprouting so well we got some for me and my daughter to try out and we love them. We will be buying more seeds soon or we would love to test seeds out if you ever decide to choose us.
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Amazon Customer
Port Orchard, US
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customer
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This package had more than the pkg that was supposed to have 4000, but they are coming up slowly. It is dry here, I have been watering , just enough to get the ground wet and they are scattered, but some are coming up. I also watered the space supposedly where i spread seeds from the supposedly 4000 seeds pkg. They are not coming up as much!
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josh
Natrona Heights, US
★★★★★ 4
Didn’t get a review on the garlic powder
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The seeds were okay but the garlic powder that I ordered was smaller than usual is a case of bait and switch
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