SP-20AB Rear View
Three Year Warranty
The Furman SP-20A is protected by a three year limited
warranty covering defects in materials and workmanship.
LEFT
RIGHT
SPEAKERS
MONO
STEREO
BRIDGED
USE FOR BRIDGED
SATELLITE / REMOTE
LEFT / MONO INPUT
RIGHT INPUT
120 VAC
60 Hz
130 Watts
ON
OFF
LIFT
GND
Architects and Engineers Specifications
The Stereo Power Amplifier shall mount in a standard 19"
rack, and shall occupy no more than half of one rack unit (1
3
/
4
")
of rack space. It shall conform to the HR specification, allowing it
to be mounted side by side with other HR units. It shall be of
stereo design but shall be capable of being bridged for mono
operation. There shall be LED indicators for Signal Present and
Overload conditions in each stereo channel. A headphone output
shall be provided and have its own volume control. Provision
shall be made for extending the number of headphones
accommodated by means of accessory Remote Stations, which
shall connect to the unit in daisy-chain fashion using standard
microphone cords.
Connections to speakers shall be via dual banana/binding
post terminals. An XLR connector shall be provided for
connection to Remote Stations. Power output shall be at least 20
watts per channel, into either 4 or 8 ohms, from 20 Hz to 20 KHz.
Distortion shall be .01% THD or less at full rated power at 1KHz,
and not more than .05% from 20 Hz to 20 KHz. The noise level
shall be at least 99 dB below full rated output. The unit shall be
protected against thermal overload, and shall be able to
withstand a short circuit on either or both outputs for an indefinite
time without damage. A switch shall be provided to select mono
(left input routed to both channels), normal stereo, or bridged
(left input drives a single load of 8 or more ohms to at least 40
watts) operation. The unit shall be internally fused, and shall
have a Ground Lift switch capable of isolating the signal ground
from the chassis. There shall also be an on/off switch with a
power-on indicator. Inputs shall be equipped with
1
/
4
" phone
jacks, and XLR balanced inputs shall be optionally available.
Versions shall be available for 120 VAC, 60 Hz or 230 VAC, 50/60
Hz power.
The unit shall be the Furman SP-20A Stereo Power
Amplifier.
HR-2 Headphone Remote Box
AVAILABLE FROM:
SP-20A SPECIFICATIONS
OUTPUTS:
Power:
20 watts per channel, stereo, into either 4 ohms or 8 ohms, or 40 watts mono into 8 ohms, 20 Hz to 20 KHz.
Connectors:
Speakers: 5-way binding posts (accommodates dual banana plugs, spade lugs, bare wires, etc.) Remote
Headphone: XLR.
INPUTS:
Input Impedance:
20K ohms.
Sensitivity:
-1.9 dBu (625 mV) required for full output into 8 ohms.
Connectors:
SP-20A, 1/4" phone, unbalanced; SP-20AB, XLR, balanced.
GENERAL:
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.
Damping Factor:
120 at 1KHz.
Slew Rate:
20 V/
µ
Sec.
Power Requirement:
120 VAC, 60 Hz, 130 watts
Mechanical:
Dimensions: 1.75" H x 8.45" W x 8.25" D. Weight: 6 lbs (2.7 kg).
NOTE:
0 dBu equals .775 Vrms.
The SP-20A is manufactured in the United States of America.
2-9733
