Samson Servo 120A Owner's Manual
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Samson Servo 120A Owner's Manual

Servo 120a owner's manual
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  • Page 3: Table Of Contents

    Table of Contents Introduction Servo 120a Features Guided Tour Front Panel Rear Panel Setting Up and Using the Servo 120a Amplifier The Servo 120a Protection Circuitry Bridge Mode Appendix A: Linearity vs. Frequency Sweep Appendix B: Power Output vs.THD Specifications Copyright 2004, Samson Technologies Corp.

  • Page 4: Introduction

    120a the perfect complement to any recording studio. • Home Theatre applications - The power and flexibility offered by the Servo 120a (it can be used either as a 60 watt stereo amplifier, or, in bridge mode, as a 120 watt monophonic amp) makes it the perfect addition to any home theatre, in conjunction with any DVD player or other surround sound system.

  • Page 5: Servo 120A Features

    • 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.

  • Page 6: Guided Tour

    5: Power switch - Use this to power the Servo120 on or off. 6: Speaker on/off LED - Lights when the Speaker on/off switch (see #6 above) is pressed in and the Servo 120a is delivering signal to its rear panel output terminals (see #7 on the following page).

  • Page 7: Rear Panel

    Stereo signals should be con- nected to both the left and right input jacks; when operating the Servo 120a in Bridge mode, use the left input jack only (see page 10 in this manual for more information).

  • Page 8: Setting Up And Using The Servo 120A Amplifier

    Speaker LED (in the Speaker on/off switch) will light instead (you’ll hear a click when this occurs). 7. Apply an input signal to the Servo 120a at or about +4 dBu (if sending signal from a mixer, Protection LED drive the output meters at approximately 0 vu).

  • Page 9: The Servo 120A Protection Circuitry

    Servo 120a short to one another. • Output impedance drops below 2 ohms: This can occur if the Servo 120a is con- nected to inappropriate speaker systems (see the “Setting Up and Using the Servo 120a”...

  • Page 10: Bridge Mode

    RIGHT(+) OUTPUT The Servo 120a provides a rear-panel switch that allows it to be used in a Bridge mode. When this switch is placed in the “RIGHT” (Stereo) position, the Servo 120a functions as a true stereo amplifier, where both of the two independent amplifier channels (left and right) can receive different input signals and produce independent output signals.

  • Page 11: Appendix A: Linearity Vs. Frequency Sweep

    Appendix A: Linearity vs. Frequency Sweep AUDIO PRECISION Servo 120a LEVEL (dBr) vs FREQ (Hz) 0dB ref 5.0000 4.0000 3.0000 2.0000 1.0000 -1.000 -2.000 -3.000 -4.000 -5.000 Linearity (0 dB Ref) vs. frequency sweep 10 Hz - 50 kHz...

  • Page 12: Appendix B: Power Output Vs.thd

    Appendix B: Power Output vs. THD AUDIO PRECISION Servo 120a THD +N (%) & LEVEL (W) vs FREQ (Hz) Watts 80.000 73.000 61.000 56.000 48.000 40.000 32.000 21.000 15.000 8.000 200.0u Power output (60 W) vs. Total Harmonic Distortion 1.000 .9000...

  • Page 13: Specifications

    Rated Output Power, per channel (@ 1 kHz) Stereo mode 4 ohm, .<0.05% THD+N 4 ohm, 1% THD+N 8 ohm, <0.05% THD+N 8 ohm, 1% THD+N Bridge mode 8 ohm, .<0.05% THD+N 8 ohm, 1% THD+N Typical Distortion, per channel THD+N (80 kHz LPF @ 1 kHz, rated output power) IMD (SMPTE 4:1, 60 Hz &...
  • Page 14 Notes...
  • Page 16 Samson Technologies Corp. 575 Underhill Blvd. P.O. Box 9031 Syosset, NY 11791-9031 Phone: 1-800-3-SAMSON (1-800-372-6766) Fax: 516-364-3888 www.samsontech.com...

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