SERVO 120A
FEATURES
> Power to spare - Each channel delivers 60 watts of power
into 4 Ohms (or, in Bridge mode, 120 watts into 8 Ohms).
> Clean, crisp sound - Impressive audio specifications such as
.01% THD, S/N of 105 dB, crosstalk of 75 dB, and frequency
response of 3 Hz to 65 kHz guarantee ultra-clean sound
quality in any live or recording environment.
> Independent input level controls for each channel with
41-position detents.
> Ten-segment LED meters for each channel continuously
display power output levels and allow you to correct for
overloading (clipping) conditions.
> Front-panel Protection LED shows you at a glance
overheating or faulty wiring conditions.
> Innovative front-panel Speaker on/off switch and
dedicated headphone jack enables private cue monitoring
of the input signal.
> Both electronically balanced 1/4˝ TRS and unbalanced
RCA-type input connector jacks are provided along with
5-way binding post output connectors.
> Convection cooling (no fan) makes for whisper-quiet
operation even in critical listening environments such as
recording studios.
> Unique bipolar circuit design that continuously keeps DC
output during idling at or near 0 volts (thus keeping idle
speakers at their zero point). This serves to minimize heat
overload problems by effectively preventing the Servo 120a
from applying power when unnecessary.
> Protection relay circuitry (linked to the DC offset circuitry)
that prevents “thumps” when powering on or off. This means
that you can use the Servo 120a with a single power strip
into which a mixer or other audio devices are connected,
without danger of damage to connected speakers.
> Toroidal transformer power supply.
> Rugged construction (an all-steel chassis with a titanium
finish and a lightweight anodized aluminum heat sink)
makes the Servo 120a eminently roadworthy.
> Flexible design allows the Servo 120a to be used free-standing
or, with the use of included rack ears, mounted in any
standard 19˝ rack (taking just a single rack space).
> Three-year warranty.
ARCHITECT’S & ENGINEER’S SPECIFICATIONS
The Samson Servo 120a shall be a single space rackmount
stereo power amplifier. It shall deliver 60 watts per channel at
4 Ohms or 120 watts into 8 Ohms in bridge mono mode. It
shall have 1/4˝ balanced inputs and RCA unbalanced inputs.
It shall be a bi-polar design and use a toroidal transformer.
The front panel shall have volume controls and LED metering
for each channel. The front panel shall also have a headphone
output jack and an associated speaker mute switch. The rear
panel shall also have binding posts for the amplifier outputs.
SERVO 120A SPECIFICATIONS
Rated Output Power, per channel (@ 1 kHz)
Stereo mode
4 Ohm, <0.05% THD+N ..... 60 W
4 Ohm, 1% THD+N ............ 80 W
8 Ohm, <0.05% THD+N ..... 50 W
8 Ohm, 1% THD+N ............ 55 W
Bridge mode
8 Ohm, <0.05% THD+N ..... 120 W
8 Ohm, 1% THD+N ............ 150 W
Typical Distortion, per channel
THD+N (80 kHz LPF @
1 kHz rated output power) .... 0.01%
IMD (SMPTE 4:1, 60 Hz &
7 kHz @ rated output power) ...0.03%
Signal To Noise Ratio
(22Hz - 22kHz
bandwidth@1dB below
rated output power) ............. 105 dB
Frequency Response ......................... 10 Hz - 20 kHz +0, -0.5 dB
3 Hz - 65 kHz, +0, -3.0 dB
Input Sensitivity ............................... -10dBv on the RCA inputs,
+4 dBu on the 1/4" inputs to
achieve rated power. (Level
control set to maximum)
Crosstalk (adjacent channels) ...........-75 dB, 1 kHz
Output DC Offset Voltage ................... ± 50 mV, DC Servo Controlled
Headphone Output Level .................... 400 mW (into 100Ω @
1% THD+N)
Dimensions (W x D x H) .................... 19˝ x 11.5˝ x 1.75˝
483mm x 292mm x 44mm
Weight ............................................ 15.4 lbs (7 kg)
PRODUCT SPECIFICATION SHEET
SERIES DESCRIPTION CATEGORY
SERVO 120A POWER AMPLIFIER AMPLIFIERS
