Samson servo 4120 brochure

Page 1

SERVO 4120-

SAMSON AUDIO

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The Servo 4120 power amplifier is designed for use
in recording studios, live performance, distributed sound
and other permanent installations. This Zspace rack-

mount quad power amplifier delivers 120 watts per chan-

nel into a 4 ohm load (in mono bridge mode, 240 watts
into 8 ohms per pair), over a bandwidth of 20 Hz to 50
kHz. The four 120 watt amplifiers can be bridged sepa-
rately to provide two 240 watt amps or one 240 watt

amp and two 120 watt amps. The 4120 features highcur-

rent output power transistors and a unique bipolar cir-
cuit design that continuously keeps DC output during
idling at or near 0 volts. It also includes balanced 1/4
and RCA inputs and binding post outputs, 2 frontpanel
protection LEDs, four separate volume controls with LED
indicators and thermal and overcurrent protection circuit-
ry The amp is also equipped with special insulated caps

and a protective covering over the output connectors con-

sistent with the new UL standard. The Servo 4120 is con-
vection cooled for silent operation, without fan noise or
need for filter maintenance.

Contact:

- Rackmount quad power amplifier (Zspace).

- 120 watts per channel into 4 ohms (quad).

- 240 watts into 8 ohms (mono bridge per pair).
- 20 Hz to 50 kHz frequency response.

- Balanced 1/4 and unbalanced RCA inputs.

- Binding post outputs.

- Turnon muting to prevent speaker "thumps."

- Smart servo circuitry protection against overheating
and overcurrent.

- Highcurrent output power transistors.

- Unique bipolar circuit design continuously keeps DC
output during idling at or near 0V (thus keeping idle
speakers at their 0 point).

- Two frontpanel protection LEDs, with LED indicators.
' Four independent volume controls with LED meters.

- New UL standard insulated caps and protective cover
over output connectors.

- Convection cooled (No Fan).

- All-steel chassis with lightweight anodized aluminum
heat sink.

- 3-Year warranty

Samson TechnologiesCorp., P.O. Box 9031, Syosset, NY 117919031 - Phone: (516) 364-2244 - Fax: (516) 364-3888 - wwwsamsontechcom

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ARCHITECTS AND ENGINEERS
SPECIFICATION

The power amplifier, being of four channels, shall
deliver a minimum of 120 watts into loads of 4 ohms, or
240 watts into loads of 8 ohms when in the bridged
mode, or 240 watts + 120 watts + 120 watts (one side
bridged). It shall be passively cooled, and shall have inter-
nal shortcircuit and thermal protection circuitry. A pro-

tection LED indicator shall activate and the power amplifi-

er shall disconnect the amp loads to protect against short
circuits, overheating, severe overcurrent conditions or DC
offset present at the outputs. The power amplifier shall
have slow startup and muted inputs on turnon. lnputs
shall be on 1/4 TRS balanced phone connectors and
unbalanced RCA gold-plated connectors. Outputs shall be
on insulated binding post connectors.The front panel
shall have 4 independent level controls, each with a level
indicator, a master power switch and amplifier protection
LED.

The power amplifier shall have a frequency response
of less than 10 Hz to 88 kHz (-3 dB), signal-tonoise equal
to or greater than 103 dB and THD less than 0.07% Total
power consumed at full audio power shall be 820 W (120
Vac/60 Hz) and 850 W (220 Vac/50 Hz)). The dimensions
shall allow for standard 19" HA rack mounting or 17.5
(444 mm) wide without rack ears. It shall be 3.25 (82.5
mm; 2 rack spaces) high and 10.75 (273 mm) deep.
Weight shall be 29.5 lb. (13.4 kg). The power amplifier
shall carry a three-year warranty.

The Power amp shall be SAMSON SERVO 4120.

SERVO 4120 SPECIFICATIONS

Output Power (typical all channels driven):

4 Q, 1 kHz, 1%TH D, 86 W
4 (2, 1 kHz, .0072% TH D, 60 W
8 Q, 1 kHz, 1%THD, 57 W
89, 1 kHz, .0046% TH D, 47 W
89 bridged, 1 kHz, 1% TH D, 171 W
8 (2 bridged, 1 kHz, < 013% TH D, 142 W
Frequency Response (-3 dB): <10 Hzto 85 kHz
Frequency Response (1 watt): 20 Hz to 20 kHz, 0/-.2
Crosstalk (adj. channels): 82 dB, 1 kHz @ rated output

Distortion (THD+N, 20 Hz to 20 kHz) (80 kHz LPF):

at rated power: < 08%

at 1 watt: < 05%

Sensitivity (level control at maximum): +4 dBu

Damping Factor (8 9): >180

Dynamic Range: 80 dB below rated output

(20 Hzto 22 kHz B.P.F.)

Input Impedance: >10 k (2 balancedl> 10 k 9 unbalanced

Power Consumption: 360 W @ 120 V/60 Hz

395 W @220 V/50 Hz

Dimensions: 17.5" (w) x 3.25" (h) x 10.75" (d)

444 mm (w) x 82.5 mm (h) x 273 mm (d)

Weight: 25 lb/ 11.3 kg
FREQUENCY RESPONSE

AUDIO PRECISION servo 4060/4120 THD +N (%) £1 LEVEL (W) Vs FREQ (Hz)
OdB rel THD
5.0000 1.000

Ap

4.0000 .9000

3.0000 .8000
2.0000 .7000
.6000

.5000

1 .0000
0.0

-1 .000 .4000
-2.000 .3000
-3.000 .2000

4.000 .1 000

-5.000 0.0

10 100 1k 10k 50k

Specifications subject to change without notice. ©1998 Samson