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Samson 120a manual

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Table of contents for the manual

  • Page 1

    1 2 0 W A TT S T E R E O P O W E R A M P L I F I E R[...]

  • Page 2

    Safety Instructions/Consignes de sécurité/Sicherheitsvork ehrungen/Instrucciones de seguridad ACHTUNG: Um die Gefahr eines Brandes oder Stromschlags zu verringern, sollten Sie dieses Gerät weder Regen noch F euchtigkeit aussetzen.Um die Gefahr eines Stromschlags zu verringern, sollten Sie weder Deckel noch Rückwand des Geräts ent- fernen. Im I[...]

  • Page 3

    Copyright 2004, Samson T echnologies Corp. Printed December , 2004 Samson T echnologies C orp. 575 Underhill Blvd. P .O . Box 9031 Syosset, NY 11791-9031 Phone: 1-800-3-SAMSON (1-800-372-6766) F ax: 516-364-3888 T able of C on tents Introduction 4 Ser vo 120a F eatures 5 Guided T our 6 F ront Panel 6 Rear Panel 7 Setting Up and Using the Ser vo 120[...]

  • Page 4

    4 Congra tulations on purchasing the Samson Ser vo 120a P ower Amplifier! Although designed for easy operation, we suggest you first take some time t o go through these pages so you can fully understand how we ’ve imple- mented a number of unique fea tures. The Servo 120a is a single rack-space stereo po wer amplifier which is optimized for use i[...]

  • Page 5

    5 Ser vo 120a F ea tures The Samson Servo 120a Pow er Amplifier utilizes the latest technology in prof essional power amplifier design. Here are some of its main f eatures: • Po wer to spare - Each channel delivers 60 wa tts of power into 4 ohms (or , in Bridge mode, 120 wa tts into 8 ohms). • Clean, crisp sound - Impressive audio specification[...]

  • Page 6

    Guided T our - F ront P anel 1: Channel input level c ontrols - These 41-position detented knobs allow you to adjust the input lev el of the signal arriving at the rear-panel input jacks (see #4 and #5 on the f ollowing page). At their fully counterclock - wise position, the signal is attenuat ed by 70 dB (essentially completely off ). At their ful[...]

  • Page 7

    7 Guided T our - Rear P anel 1: A C Input - Connect the supplied standard 3-pin “IEC ” plug here. 2: F use Holder - Inser t a 2.5 amp, SL O -BL O 125 volt fuse here f or 115 volt operation, or a 1.5 amp, SL O -BL O 250 volt fuse for 230 v olt operation. W ARNING: F uses should only be replaced with the power cor d disconnected. 3: 5-way Binding[...]

  • Page 8

    8 8 Setting Up and Using the Ser v o 120a P ow er Amplifier Bridge switch Output connectors Input connectors Protection LED Headphone jack and Speaker on/off switch Channel Input control T en-segment LED meters Setting up your Ser vo 120a is a simple proc edure which takes only a few minutes: 1. Remove all packing materials (save them in case of ne[...]

  • Page 9

    9 The Ser v o 120a Prot ec tion Circuitry As noted in the “Guided T our ” sec tion of this manual, the Servo 120a's front panel Pr otec tion LED indicates the activity of the relay speaker connection circuitry . When the Pr otec tion LED is lit, this circuitry is inactive, and all connected speakers are muted (provided with 0 v olts DC ), [...]

  • Page 10

    10 Bridge Mode The Servo 120a provides a rear-panel switch tha t allows it to be used in a Bridge mode. When this switch is placed in the “RIGHT ” (Stereo) position, the Ser vo 120a functions as a true stereo amplifier , where both of the two independent amplifier channels (left and right) can receive diff erent input signals and produce indepe[...]

  • Page 11

    Appendix A: Linearit y v s. F requenc y S weep 11 Linearity (0 dB Ref ) vs. frequency sweep 10 Hz - 50 kHz 5.0000 4.0000 3.0000 2.0000 1.0000 0.0 -1.000 -2.000 -3.000 -4.000 -5.000 10 100 1k 10k 50k Ap AUDIO PRECISION Servo 120a LEVEL (dBr) vs FREQ (Hz) 0dB ref[...]

  • Page 12

    12 Appendix B: P ower Output v s. THD Po wer output (60 W ) vs. T otal Harmonic Distor tion 80.000 73.000 61.000 56.000 48.000 40.000 32.000 21.000 15.000 8.000 200.0u 0.000 .1000 .2000 .3000 .4000 .5000 .6000 .7000 .8000 .9000 1.000 20 100 1k 10k 50k Ap AUDIO PRECISION Servo 120a THD +N (%) & LEVEL (W) vs FREQ (Hz) THD W atts[...]

  • Page 13

    13 Specifications Rated Output P ower , 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 T ypical Distor tion, per channel THD+N (80 kHz LPF @ 1 kHz, rated output power) .01% IMD (SMPTE 4:1, 60 Hz &[...]

  • Page 14

    14 Notes[...]

  • Page 15

    [...]

  • Page 16

    Samson T echnologies Corp . 575 Underhill Blvd. P .O . Box 9031 Syosset, N Y 11791-9031 Phone: 1-800-3-SAMSON (1-800-372-6766) F ax: 516-364-3888 ww w .samsontech.com[...]