To obtain best results from
this Furman Sound electronic product, please
be sure to read this manual carefully before
using it. Please fi ll out and return the Warranty
Registration Card immediately to obtain full
protection under the terms of the Limited
Warranty, in case your ownership documents
are lost. Please verify that the serial number
shown on the Warranty Card matches the
serial number on your unit.
20 watts per channel in stereo mode
May be bridged for 40 watt mono
operation (requires load of 8 or more
Front panel headphone jack with
Ideal for small speakers or headphone
Overload and signal-present LED’s for
Provision for remotely located
headphone volume controls (Using
the Furman HR-2 Remote headphone
Congratulations on your purchase of a
Furman Model SP-20AB you have cho sen an
extremely versatile general purpose power
amplifi er. The SP-20AB is a compact 20 watt
per channel stereo amplifi er capable of normal
stereo, two channel mono, or single channel
(bridged) mono operation. It is intended to pow-
er speakers or headphones with equal ease.
The SP-20AB is fully protected against thermal
overload and can withstand a short circuit on
either or both out puts for an indefi nite time
without damage. Additionally, the SP-20AB’s
advanced toroid al transformer assures reduced
electrical hum and mechanical noise from the
unit itself. This minimizes leakage into other
nearby sensitive equipment, such as mic
preamps, video monitors, etc.
The SP-20AB is expected to fi nd application
in recording studios (for driving small near
fi eld monitors and/or headphone systems), in
distributed commercial sound installations, for
powering high-frequency drivers in bi-amped
or tri-amped PA systems, and wherever a
requirement exists for compact, high quality,
moder ate power audio amplifi cation.
The SP-20AB Stereo Power Amplifi er is a
unique and economical 20 watt per channel
stereo amplifi er. It 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
The SP-20AB is housed in a half single-space
rackmount chassis. The SP-20AB can be
mounted in a 19” rack by using the Furman
HRKIT-1 rack mounting kit or side by side
with another SP-20AB using the HRKIT-2 rack
