Furman SP-20AB - Power/Headphone Amplifier

Furman SP-20AB - Half-Rack Stereo Power Amplifier - 20W per Channel into 8 Ohms (Balanced Connectors)

Furman SP-20AB - Half-Rack Stereo Power Amplifier - 20W per Channel into 8 Ohms (Balanced Connectors)

No Longer Available
  • 1Description

The SP-20A is a stereo power amplifier housed in a half-rack chassis that delivers 20 watt per channel into either 4 ohms or 8 ohms. It is ideal for recording studio applications, where it can be used to drive small reference speakers, or as a headphone driver for the HR-2 headphone remote stations, while doubling as the tape playback amplifier in the tracking room.

The SP-20A may be operated in any of three modes as selected by a rear-panel switch: normal stereo, two channel mono, or single channel (bridged) mono. The latter mode allows a power output of 40 watts provided the load is 8 or more ohms. Output is available through either of two connectors. Standard banana jack binding posts for speakers, or through a male XLR connector. The latter allows the unit to become the headphone driver.

The amplifier has an input level control on the left side of the front panel. A pair of yellow LED's, one for each channel -- light up whenever signal is present. Another pair of red LED's warns of any overload condition present in either channel. The SP-20A is fully protected against thermal overload, and it can withstand a short circuit on any or all outputs for an indefinite time without damage.

Stereo power amplifier ideal for small speakers or headphone system
Toroidal transformer provides for ultra-quiet performance
Overload and signal-present LED's for each channel
Bridged mono, two channel mono and stereo operation
Speaker on-off switch
Front panel headphone jack with volume control
Convection cooling system dissipates heat through the heat sinks and chassis for optimal cooling and maintenance-free operation
In the Box
Furman SP-20AB - Half-Rack Stereo Power Amplifier - 20W per Channel into 8 Ohms (Balanced Connectors)
  • Three Year Warranty
  • Table of Contents
    • 1Description
    Power Rating Stereo @ 4 ohms: 20 watts per channel
    Stereo @ 8 ohms: 20 watts per channel
    Bridged @ 8 ohms: 40 watts
    Damping Factor 120 at 1kHz
    Input Sensitivity -1.9dBu (625 mV) required for full output into 8 ohms
    Input Impedance 20k ohm
    Gain Not specified by manufacturer
    Frequency Response 20Hz to 20kHz, 1 watt output, +0, -1dB
    Signal-to-Noise Ratio Not specified by manufacturer
    Total Harmonic Distortion (THD) 0.01% THD at full rated power at 1kHz; 0.05% THD 20Hz to 20kHz
    Input Connections 1 x XLR female per channel
    Output Connectors Dual banana/binding post terminals
    1 x XLR male satelite/remote
    1 x Headphone
    Controls Front Panel 1 x Rotary input level control
    1 x Rotary headphone volume control
    1 x Speaker on/off switch
    Controls (Rear) Ground lift switch
    Indicators 1 x Signal, 1 x Overload LED indicators per channel
    Cooling Convection
    Power Consumption 130 watts
    Dimensions 8 7/16" x 8 1/4" x 1 3/4"
    Weight 6 lbs
    Specialties Ground lift switch
    Packaging Info
    Box Dimensions (LxWxH) 11.2 x 10.8 x 2.7"
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