Z-Systems rdp-1 Pre-amp		The rdp-1 is the result of many years of research and development in digital audio technology, and when used properly, it will give you listening pleasure you may not have thought possible from your system. The simplest description of the rdp-1 is given by its name: it's a digital preamplifier. That is to say, it performs the functions of a conventional preamplifier, only on digital input signals instead of analog signals. This is shown schematically in the figure below.
The rdp-1's most significant feature is Transparent Tone ControlTM (TTC), a sophisticated digital-domain tone-correction system free of the sonic degradation or non-beneficial coloration associated with analog tone controls.
Z-Systems rdp-1 Equalizer -Dimensions 16.5" Wide x 3.25" Tall x 10.0" Deep -Weight 11 lbs. -Color available in black or silver -Inputs 1 AES/EBU (transformer-isolated, 110-ohm terminated) -1 S/PDIF (transformer-isolated, 75-ohm terminated) -Outputs 1 AES/EBU 1 S/PDIF -Input/output precision up to 24-bits Gain control from -12 dB to +12 dB -Gain resolution 0.2 dB increments from +12 dB to -12 dB -Filter types 4 parametric, 2 shelving -Center frequency resolution 1/6-th octave ISO from 28Hz to 18 KHz -Filter gain/cut from -12 dB to +12.0 dB -Filter bandwidths Q = 0.4, 0.8, 1.3, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0 -Shelf filter slopes 6 dB/octave		-Dither types 20-bit and 16-bit proprietary floating-point techniques -Digital filter architecture proprietary minimum roundoff-noise structure -Dynamic range better than 144 dB -Stereo modes Stereo-linked operation -Number of presets 99 including power up preset -THD+N better than -135 dB -Processor type TMS320C31 32-bit floating-point DSP -Processor performance 60 MFLOPS -Digital audio demodulator/modulator Crystal Semiconductor cCS8412(8414)/CS8402(8404) -Sample rates supported 32 kHz, 44.1 kHz, 48 kHz. 88.2 kHz/96 kHz cupgrade available from factory -Auxiliary-bit status handling unit is transparent to channel status, validity, and cauxiliary bits -Power supply 110/220VAC, 50/60Hz
Accuphase DG-28 Digital Equalizer - Voicing equalizer with fully digital signal processing - 64 filter cells connected in parallel - High-precision adjustment in 64 frequency bands, using 1/6-octave spacing - Large display panel shows graphical frequency response curve - Built-in analyzer and sound field compensation functions - Automatic measurement and adjustment - Option boards allow connection of analog equipment - Supplied remote commander		Z-Systems rdp-6 Equalizer

Z- Sysytems Equalizer rdp-1 reference digital pre-amplifier	$	5000.00
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Accuphase Digital Equalizer DG-38	$	8500.00