Phonos Duo (Silver)

High-end RIAA phono preamp for turntables with MM (Moving Magnet) and MC (Moving Coil) cartridge systems

Balanced (XLR) and unbalanced (RCA) inputs/outputs for versatile connectivity

Six selectable capacitance values for MM: 12 pF, 47 pF, 100 pF, 150 pF, 220 pF, 330 pF

Six selectable impedance values for MC: 20 ohm, 50 ohm, 100 ohm, 220 ohm, 500 ohm, 1000 ohm

VOLTAiR Technology (120V) for unparalleled dynamic range and ultra-low noise

Douglas Self RIAA filter design for precision and linear frequency response

Three gain settings for MM: 30 dB, 40 dB, 50 dB

Three gain settings for MC: 50 dB, 60 dB, 70 dB

Subsonic filter to eliminate low-frequency rumble from turntable mechanisms

Ground lift switch for eliminating ground loops

Mono switch for mono playback of stereo records

Mute switch for instant output silencing

Gold-plated RCA connections for optimized signal transfer

Ground connection with banana plug socket for secure grounding

Internal Linear Power Supply with shielded toroidal transformer

Frequency Range: 10 Hz - 100 kHz, Crosstalk: -80 dBu

General Specifications

Model Name: Phonos duo

Color: Red

SKU: 2454

Model #: 2454

Category: Professional Fidelity

Type: RIAA Phono Preamplifier

Cartridge Compatibility: Moving Magnet (MM) and Moving Coil (MC)

Inputs: 2 pairs of stereo inputs (1 x Balanced XLR, 1 x Unbalanced RCA)

Outputs: 2 pairs of stereo outputs (1 x Balanced XLR, 1 x Unbalanced RCA)

Technology: SPL VOLTAiR technology with RIAA filter in Douglas-Self design

Adjustment Options

MM Capacitance: 12 pF, 47 pF, 100 pF, 150 pF, 220 pF, 330 pF

MC Impedance: 20 ohm, 50 ohm, 100 ohm, 220 ohm, 500 ohm, 1 kohm

Amplification Settings

MM Preamplifier Gain: Low +30 dB, Medium +40 dB, High +50 dB

MC Preamplifier Gain: Low +50 dB, Medium +60 dB, High +70 dB

Audio Performance

Frequency Range: 10 Hz " 100 kHz

Crosstalk: -80 dBu

Output Impedance: 75 ohm

MM Noise (A-weighted, 50 dB amplification): -82 dBu

MM Dynamic Range (50 dB amplification): 132 dB

MC Noise (A-weighted, 70 dB amplification): -62 dBu

MC Dynamic Range (70 dB amplification): 129 dB

Power Supply

Internal Linear Power Supply with Shielded Toroidal Transformer

Operating Voltage for Analog Audio: +/- 60 V

Operating Voltage for Relays and LEDs: +12 V

Mains Voltage: Selectable 230 V AC / 50 Hz or 115 V AC / 60 Hz

Power Consumption: Maximum 30 VA

Standby Power Consumption: Less than 0.3 W

Physical Specifications

Dimensions: 11 in (W) x 2.24 in (H) x 11.81 in (D)

Unit Weight: 7.27 lbs

Shipping Weight (with packaging): 9.81 lbs

Box Dimensions: 21.26 in (W) x 4.72 in (H) x 14.96 in (D)

Identification

GTIN: 4260149320544

Additional Features

Switchable Mono Mode for playback of mono records

Mute Switch for instantly muting all outputs

Subsonic Filter to remove turntable rumble

Ground Lift Switch to eliminate ground loops

Gold-Plated RCA Sockets for optimal signal transmission