Aural HiFi

Z-Systems rdp-1 // Preowned / Digital Preamplifier / EQ

The Z-Systems RDP-1 is one of those sleeper studio legends that found a cult following among audiophiles who know what real digital control sounds like. Designed by Z-Systems, this is a reference-grade digital processor built for mastering engineers, not marketing departments—and you can hear it instantly. The RDP-1 delivers ultra-precise digital volume control, input switching, and processing without smearing, flattening, or bleaching the music. The presentation is clean, dynamic, and shockingly transparent, with rock-solid imaging and zero digital nasties. It’s not flashy, it’s not trendy, and it doesn’t try to sound “analog”—it just gets out of the way and lets the source speak. For digital purists and system builders chasing absolute control with zero compromise, the RDP-1 is a serious, no-nonsense weapon.
*Includes original box, manual, and remote

Verified all inputs and outputs
RCA
XLR
Optical
Verified operation of controls
Verified remote control operation
Unit has original box and packing materials

S/N: 04372
FACTORY SPECS
Digital inputs: 2 AES/EBU, 3 S/PDIF (RCA), 1 optical (TosLink with ST-type glass optional)
Digital outputs: 1 AES/EBU, 1 S/PDIF (RCA), 1 optical (TosLink with ST-type glass optional). 24-bit input/output. 32-bit DSP with internal 40-bit floating-point arithmetic, used for all gain and equalization
Dynamic range: >144dB
THD+N: better than -135dB
Number of memories/presets: 99
Gain control: from -95dB to +12dB.
Dimensions: 17" W by 4.5" H by 10" D
Weight: 14 lbs

$1200

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-Systems