Spectral DMC-30ss

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S

pectral’s DMC-30SS is a tour de force in preamplifier design, with its ultra-fast circuits, heroic volume control, innovative power supply, and meticulous attention to detail. Putting it into a system is like washing months of winter off a picture window. Timbres are richly saturated, soundstages huge and defined, and resolution of transient detail is superb (provided that these qualities exist in the recording). Moreover, the DMC-30SS has absolutely spectacular soundstaging, with tremendous depth, width, layering along a continuum, and sense of air among instruments. The DMC-30SS is extremely “fast”-sounding with lightning-quick reproduction of transient detail, yet it never sounds analytical. A world-class preamp that is underpriced relative to its performance. spectralaudio.com

DMC-30SS Reference Preamplifier

Front Panel Controls

• Output Level 
• Balance left/right 
• Input selectors 
• Monitor switch 
• Stereo/Mono switch 
• Absolute Phase switch 
• Mute Switch 
• Surround LED indicator 
• Protection LED indicator 

Front Panel Display

• Output Level display - 50 step LED 
• Output Balance display - 50 step LED 

Rear Panel

• 5 RCA Input connector sets (gold) 
• Balanced Input Neutrik XLR connectors (gold) 
• Tape input and output RCA connector set (gold) 
• Main Output RCA connectors (gold) 
• Balanced Output Neutrik XLR (gold) 
• AC Power input connector, switch and line fuse 

DMC-30R Remote Control

Control Buttons

• Output Level 
• Channel Balance 
• Mute 
• Input selectors 
• Stereo/mono 
• Phase Invert 
• Tape Monitor 
• Display Brightness 
• Control Rate 
• Control Reset 

DMC-30SS Preamplifier Technical Data

Input Compliment: 

7 inputs - 5 normal, 1 balanced , tape monitor 

Output Compliment: 

3 outputs - normal, balanced, tape 

Control Compliment:

    Output Attenuation 

Motorized fader conductive plastic, modified log taper 

    Output Balance 

Relay attenuator system with center position bypass 

    Mute Switch 

0, -20 dB attenuation 

    High Level Trim 

0 and -12dB attenuation for all high level inputs 

Mode Switches: 

Stereo/Mono, Absolute Phase 

Input Select: 

6 position and  Tape Monitor 

Output Level Display              

50 step LED

Output Balance Display

50 step LED

Input Impedance

15K ohms

Output Impedance

100 ohms

Recording Amplifiers:

    Input Impedance 

11K ohms, 100 ohms minimum 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 deg. Celsius @ 25 deg. room temp 

Frequency Response: 

DC to 1.5 MHz -3dB
DC to 2.5 MHz -10dB
Any level to 36 V RMS 

Slew Rate: 

1000 V/us or greater 

Rise Time: 

70 ns 

Distortion: 

Less than .01% THD and IM 

Crosstalk: 

Greater than 90dB 

Noise: 

105dB A Weighted, ref 100 mV @ 1 KHz 

Output Voltage: 

1.6 VRMS, 100 V peak to peak maximum 

Output Current: 

1 Amp maximum per channel, balanced out 

Gain Options: 

15 dB, 21 dB 

Remote Control:  

Operates all front panel functions, level and balance rates,
display brightness and system reset 

DMC-30SS Mechanical Specifications

Dimensions: 

48.3 cm (19") W, 10.4 cm (4.1") H, 31.1 cm (12.25") D 

Weight: 

11.8 KG. (26 lbs) net.