SERVO 4060/4120 Q U A D AMPLIFIER OWNERS MANUAL ®
Introduction 3 Servo Quad Amplifier Features 4 Guided Tour 5 Front Panel 5 Rear Panel 6 Setting Up and Using the Servo Quad Amplifier 7 The Servo Quad Amplifier Protection Circuitry 8 Bridge Stereo Mode 9 Bi-amplification Applications 10 Appendix A: Linearity vs. Frequency Sweep 11 Appendix B: Power Output vs.
Introduction Congratulations on purchasing the Samson Servo Quad Amplifier! Although designed for easy operation, we suggest you first take some time to go through these pages so you can fully understand how we’ve implemented a number of unique features. The Servo Quad Amplifier is actually four discrete power amplifiers in a single chassis, optimized for use in live performance, recording studios, and permanent installations.
Servo Quad Amplifier Features The Samson Servo Quad Amplifier utilizes the latest technology in professional power amplifier design. Here are some of its main features: • Power to spare - Each channel of the Servo 4060 delivers 60 watts into 4 ohms (or, in bridge stereo mode, 120 watts into 8 ohms). Each channel of the Servo 4120 delivers 120 watts of power into 4 ohms (or, in bridge stereo mode, 240 watts into 8 ohms). • Clean, crisp sound - Impressive audio specifications such as 0.
Guided Tour - Front Panel 1 3 0 dB CLIP 70 100% -15 3 -16 -2 -27 -33 -40 4 -2 -27 -33 -40 4 LEVEL CHANNEL 3 -4 3 -2 -27 -33 -40 POWER 50 -19 -3 .5 4 CH3/4 PROTECTION SERVO 4120 - 120 WATT X 4 AMPLIFIER 30 -5 SAMSON 10 -9 0dB ∞ -0 .
Guided Tour - Rear Panel 1 3 CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN + + 3 - - + + SERVO 4120 - QUAD AMPLIFIER ! USE CLASS 2 WIRING - emc + 4Ω 120W MAX. LOAD CH4 - EUR . USA . JPN + - AVIS; RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. BRIDGE OFF AC INLET CH3 + MONO 8Ω ATTENTION: DISCONNECT SUPPLY CORD BEFORE CHANGING FUSE. FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE OF FUSE.
Setting Up and Using the Servo Quad Amplifier Setting up your Servo Quad Amplifier is a simple procedure which takes only a few minutes: 1. Remove all packing materials (save them in case of need for future service) and decide where the amplifier is to be physically placed—it can be used free-standing or mounted in a standard 19" rack, requiring only two rack spaces.
The Servo Quad Amplifier Protection Circuitry As noted in the “Guided Tour” section of this manual, the Servo Amplifier's front panel Protection lights indicate the activity of the relay speaker connection circuitry. When the Protection lights are lit, this circuitry is inactive, and all connected speakers are muted (provided with 0 volts DC), thus protecting them and preventing any audible “thump” from occurring.
Bridge Stereo Mode BRIDGE OFF ON The Servo Quad Amplifier provides two rear-panel switches that allow it to be used in a unique bridge stereo mode. When these switches are in their “Off” (left) position, the Servo Quad Amplifier functions as a true quad amplifier, where each of the four independent amplifier channels can receive different input signal and produce independent output signal.
Bi-amplification Applications Because the Samson Servo Quad Amplifier actually contains four discrete power amplifiers in a single chassis, it is particularly well-suited for use with bi-amped speaker systems. These systems utilize active crossover networks (sometimes called electronic crossovers) that are specially designed to handle low-wattage line-level signals. As shown in the illustration on the right, the crossover in such a system is placed just prior to the power amplifier in the signal chain.
Appendix A: Linearity vs. Frequency Sweep AUDIO PRECISION servo 4060/4120 THD +N (%) & LEVEL (W) vs FREQ (Hz) 0dB ref THD 1.000 5.0000 Ap .9000 4.0000 3.0000 .8000 2.0000 .7000 1.0000 .6000 0.0 .5000 -1.000 .4000 -2.000 .3000 -3.000 .2000 -4.000 .1000 0.0 -5.000 10 100 1k 10k Linearity (0 dB Ref) vs.
Appendix B: Power Output vs. THD AUDIO PRECISION servo 4060/4120 THD +N (%) & LEVEL (W) vs FREQ (Hz) THD Watts .50000 80.000 / 160.000 Ap .45000 73.333 / 146.666 66.667 / 133.333 .40000 60.000 / 120.000 .35000 53.333 / 106.666 .30000 46.667 / 93.333 .25000 40.000 / 80.000 33.333 / 66.666 .20000 26.667 / 53.333 .15000 20.000 / 40.000 .10000 13.333 / 26.666 .05000 6.666 / 13.333 0.0 0.000 / 0.000 10 1k 100 10k 20k Power output (Servo 4060 @ 60 W, Servo 4120 @ 120 W) vs.
Specifications 1. Rated Output Power, per channel At 1 kHz, 4 ohm, .<0.05% THD+N Model 4120 Model 4060 At 1 kHz, 4 ohm, 1% THD+N Model 4120 Model 4060 At 1 kHz, 8 ohm, <0.05% THD+N Model 4120 Model 4060 At 1 kHz, 8 ohm, 1% THD+N Model 4120 Model 4060 120 W 60 W 150 W 80 W 120 W 60 W 130W 64 W 2. Typical Distortion, per channel THD+N (80 kHz LPF @ 1 kHz, rated output power) IMD (SMPTE 4:1, 60 Hz & 7 kHz @ rated output power) .005% .015% 3.
Produced by On The Right Wavelength for Samson Technologies Corp. Copyright 1997, Samson Technologies Corp. Printed April, 1997 Samson Technologies Corp. 575 Underhill Blvd. P.O.
