Goodwin's High End

Spectral Preamps

Goodwin's High End is the oldest and most experienced Spectral dealer in the US. We recently celebrated the 25th anniversary of our long association with Spectral and Spectral has become our #1 selling line here in the store. When you hear the sonic purity and sheer naturalness of the current generation of Spectral componentry you will immediately understand why so many people end up choosing to base their system around their components.

Spectral DMC-20 Stereo Preamplifier

(Discontinued)

 

 


SPECIFICATIONS
 

DMC-20 Reference Preamplifier
Front Panel Controls

  • Input Selector switch
  • Balance Control
  • Output Attenuation Control
  • Mute switch
  • Absolute Phase switch
  • Tape Monitor switch
  • Protection Circuit LED indicator
  • Power LED indicator
Internal Controls
  • Input Trim 20 dB range for tuner, disc, aux 1, aux 2, tape
  • Input Trim Bypass Switches
  • Phono Input Impedance selector (opt.)
  • Protection System bypass switch
  • Balanced Input Level 20 dB range
  • Tape output level
  • Balanced High Level operation switch
Rear Panel Connectors
  • Signal Ground post (gold)
  • 5 RCA Input connector sets (gold)
  • Balanced Input Neutrik XLR connectors for aux 3 (gold)
  • Tape input and output RCA connector set (gold)
  • Balanced output RCA connectors for non-inverting, inverting
  • Balanced output Neutrik XLR connectors (gold)
  • DC Power Hi-Rel input connector
DMC-20 Preamplifier Technical Data
Input Compliment:
    7 Inputs - tuner, disc, aux 1, aux 2, aux 3, (balanced, phono) optional
     
Output Compliment:
    4 ouputs - normal, inverted, balanced, tape
     

 

Control Compliment
Output Attenuation:

    32 step conductive plastic, modified log taper
     
Output Balance:
    15 step attenuator switch with center position bypass
     
Mute Switch:
    0 - 20 dB attenuation
     
High Level Trim:
    0 to 10 dB attenuation for each channel all high level inputs, with attenuation bypass switches.
     
Mode Switches:
    Stereo/mono, absolute phase
     
Input Selections:
    6 plus tape monitor
     

 

Recording Amplifiers
Input Impedance:

    11K ohms, 100 ohm min. load
     
Output Impedance:
    2K ohms
     

 

Protection Circuit
Protection Mode:

    DC Offset, oscillation
     
Method:
    Crowbar output relays
     
Sensitivity:
    20 mV continuous DC
     
Recovery:
    Approx. 10 seconds
     
Chassis Temperature:
    Internal 48° C @ 25° room temp.
     

 

DMS-20 Power Supply Technical Data
Output Voltages:

    1) Dual ± 40 VDC @ 0.6A
    2) Dual ± 40 VDC @ 0.6A
    3) Single ± 5 VDC @ 1A
    4) Single ± 10 VDC @ 1A
     
Noise and Ripple:
    Less than 200 mV peak to peak
     
Reserve Capacity:
    180 Joules per supply (±40 VAC)
     
Input Mains Voltage:
    100VAC, 120 VAC, 220 VAC ±10% @ 47.5 Hz to 440 Hz (factory set)
     
Power Consumption:
    80 watts normal, 175 watts max.
     
Protection:
    Short circuit, over voltage, line transient protected
     

 

Model 201 Balanced Output Module
Fully Balanced Operation:

    All D.C. coupled
     
Frequency Response:
    DC to 4 MHz, -3 dB DC to 2.5 MHz, -0.10 dB any level to 36 V RMS
     
Slew Rate:
    1000 V/us or greater
     
Rise Time:
    70 nanoseconds
     
Distortion:
    Less than 0.01% THD and IM
     
Crosstalk:
    Greater than 90 dB
     
Noise:
    105 dB A Weighted, ref 100 mV @ 1 KHz
     
Output Voltage:
    1.6 VRMS, 100V P-P max.
     
Output Current:
    1 Amp max. per channel, balanced out
     
Gain:
    40 dB unbalanced, 34 dB balanced
     

 

Model 202 Phono Module (optional)
Servo-Controlled:

    All DC coupled
     
Gain:
    Selectable 30 dB, 38 dB, 45 dB
     
Phono Equalization:
    0.25 dB, 20 Hz thru 20 KHz
     
Distortion:
    Less than 0.01% THD and IM
     
Noise:
    95 dB A Weighted, ref 100 mV @ 1 KHz
     
Input Impedance:
    Selectable 10, 20, 100, 800, 47K
     
Load Capacitance:
    100pf
     
Output Voltage:
    17.7 VRMS, 50 V P-P max.
     
Servo Time Constant:
    0.2 Hz
     

 

Model 203 Balanced Input Module (optional)
Fully Balanced Operation:

    All DC coupled
     
Frequency Response:
    DC to 15 MHz, 3 dB DC to 10 MHz, -0.10 dB
     
Slew Rate:
    500 V/us or greater
     
Distortion:
    Less than 0.01% THD and IM
     
Input Impedance:
    10K ohms
     
Gain:
    Unity or -10 dB attenuation continuously variable
     

 

DMC-20 Preamplifier Mechanical
Weight:

    12 lbs (5 1/4 KG)
     
Dimensions:
    2 1/2" (6.35cm)H x 19" (48.26cm)W x 12 1/2" (31.75cm)D
     

 

DMS-20 Power Supply Mechanical
Weight:

    22 lbs (49 KG)
     
Dimensions:
    2 1/2" (6.35cm)H x 19" (48.26cm)W x 12 1/2" (31.75cm)D
     

 

 
All information and specifications provided herein are subject to change owing to the evolutionary nature of Spectral designs and technology. All Spectral products are covered by a three-year limited warranty for parts and labor. Please see warranty for complete details of coverage.
 
   
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