Stereo Power Amplifier with Front Panel Headphone Jack & Volume - 20 Watts Per Channel @ 8 ohm
Half Rack Power Amplifier
The SP-20AB Stereo Power Amplifier is a unique and economical 20 watt per channel stereo amplifier. Its toroidal transformer delivers ultra-quiet performance, making it ideal for recording studio applications. The SP-20AB 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. It’s housed in a compact, half rack chassis, allowing it to be mounted either alone or side by side with other SP-20AB's in a 19" rack. The SP-20AB's small size makes it ideal for modular use in large commercial installations with multiple small speakers.
The SP-20AB's 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 a headphone driver, linking any number of Furman HR-2 Headphone Remote Stations together via standard microphone cables. Each HR-2 station conveniently clips to a mic stand and provides individual volume controls for two sets of headphones.
The SP-20AB has a convenient 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 (threshold -28 dBu). Another pair of red LED's show an overload condition in either channel. The SP-20AB is fully protected against thermal overload, and it can withstand a short circuit on any or all outputs for an indefinite time without damage.
Furman SP-20AB Features :
- 20 watts per channel in stereo mode
- Toroidal transformer for ultra-quiet performance
- May be bridged for 40 watt mono operation (requires load of 8 or more ohms)
- Front panel headphone jack with volume control
- Ideal for small speakers or headphone system
- Speaker on-off switch
- Overload and signal-present LED's for each channel
- Power-on indicator
- Ground lift switch
- Provision for remotely located headphone volume controls
- 3-year limited warranty
Model SP-20AB: Provides balanced inputs with XLR connectors in place of 1/4" phone inputs.
Rack Mounting Kits: Adaptor kits for mounting one SP-20A centered in a 19" rack (HRKIT-1), or two SP-20AB's side by side in a 19" rack (HRKIT-2).
Model HR-2 Headphone Remote Station: A compact, unobtrusive box that clamps to a mike stand or belt, providing two headphone jacks, each with its own volume control. Any number of HR-2 stations may be connected to an SP-20AB using standard microphone cables. Comes with snap-on, snap-off mike stand clamp. Click here for a picture and description of the HR-2 Headphone Remote Station.
Furman SP-20AB Specifications :
Power: 20 watts per channel, stereo, into 8 ohms, or 30 watts mono into 16 ohms, 20 Hz to 20 KHz.
Connectors: Speakers: 5-way binding posts (accommodates dual banana plugs, spade lugs, bare wires, etc.)
Remote Headphone: XLR, balanced
Input Impedance: 20K ohms.
Sensitivity: -1.9 dBu (625 mV) required for full output into 8 ohms.
Distortion: .01% THD at full rated power at 1 KHz; .05% THD 20 Hz to 20 KHz.
Dynamic Range: Greater than 99 dB
Frequency Response: +0, -1 dB from 20 Hz to 20 KHz, 1 watt output.
Dynamic Headroom: 2 dB, stereo, measured with 10 ms toneburst at 1 KHz, 1% duty cycle.
Power Requirements: 120 VAC, 60 Hz, 130 watts
Dimensions: 1.75” H x 8.45” W x 8.25” D
Weight: 9 lbs.