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I purchased the unit from a private party and the original owners manual was not available. Having the ability to download it was extremely helpful and clarified operating the equipment immensely. This is a complicated unit and without the manual I would not have been able to maximize it's potential. Thank you.
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Being a user of older radios of many kinds, preferring them over more modern rigs, this manual was invaluable in the programming of my two. I now know for certain what the assorted buttons functions are, and am very grateful to have found this excellent site. Many thanks for your assistance, Tony.
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Clear and easy to read. All details as expected. Price acceptable , and quick delivery.
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Quick response and exactly what I was looking for and at a great fair price!
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5 star quality on these downloadable manuals. Easy to read and all the information is there. A must when doing a custom install or needing to service your precious old school electronics.
Setting Up and Using the Servo Amplifier
Setting up your Servo Amplifier is a simple procedure which takes only a few minutes:
STEREO
BRIDGED MONO
Servo-550 Bridged Mono / Stereo switch
GROUND
+RIGHT
LEFT +
GROUND RIGHT LEFT
Servo-550 output connectors
RIGHT LEFT
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 freestanding or mounted in a standard 19" rack, requiring only two rack spaces. Be careful when handling the Servo Amplifier�the rear heat sink fins have sharp edges. When installed, make sure that the rear heat sink fins are unobstructed and that there is good ventilation around the entire unit. Before rack-mounting, use a Philips screwdriver to remove the bottom panel rubber feet. If your rack contains multiple amplifiers, we recommend that you avoid potential overheating problems by using spacer panels to ensure that the amps are not directly on top of one another. If you are using a Servo-550, set the Bridged Mono / Stereo switch on the rear panel as desired (see Appendix E for more information). 2. Begin by making the speaker connections, using either the binding post, push-spring or 1/4" output connectors on the rear panel. It is never a good idea to power up any amplifier that is not connected to loudspeakers. Any loudspeakers with a minimum impedance load of 4 ohms (that is, 4 ohms or greater) can be used. See Appendix A for a partial listing of compatible nearfield monitors. 3. Next, make the signal input connections, using the electronically balanced 1/4" input connectors on the rear panel (or, in the Servo-260 and Servo-170, the unbalanced RCA-type connectors). On the front panel, turn both the left and right Channel input controls fully counterclockwise (to their ��� setting). 4. Finally, connect the supplied 3-pin �IEC� plug to the rear panel AC connector and plug the other end into any grounded AC socket. Because of the relay protection circuitry built into the Servo Amplifier, you can even plug it into the same power strip that other audio devices (such as a mixing console) are connected to. You can then turn on all devices at once with the single power strip on-off switch, with no danger of damaging connected speakers by generating �thumps.� 5. Press the front panel Power switch in order to turn on the Servo Amplifier. The Protection light will go on for approximately five seconds, and then switch off (you�ll hear a click when it does).
+RIGHT
GROUND OUTPUT 120W/4�
LEFT+
Servo-260 and 170 output connectors
R L
(UNBALANCED 10K�/0dBM) RIGHT LEFT
LEFT
RIGHT
INPUTS
(BALANCED 10K�/0dBM)
INPUTS (BALANCED 10K�/0dBm0)
Servo-260 and 170 input connectors
Servo-550 input connectors
PROTECTION
POWER
CLIP
IDLE
6. Apply an input signal to the amplifier at or about +4 dBu (if sending signal from a mixer, drive the output meters at approximately 0 vu). While the input signal is present, slowly raise the Channel input controls until the desired sound level is achieved. For best signal-to-noise ratio, the Servo Amplifier should normally be run with the Channel input controls at or near maximum (fully clockwise, at the �MAX� position); if you are using a mixer that has a master output level control (sometimes called �control room level�), use it to attenuate the signal as necessary to achieve the desired speaker level. In normal operation, the Clip lights should not light at all; if they do, lower the level of the incoming signal so that they do not light at all (clipping not only sounds awful, it can also damage speakers). In normal operation, the Idle lights will flash occasionally (they go on whenever incoming signal is present). If you encounter difficulty with any aspect of setting up or using your Servo Amplifier, you can call Samson Technical Support (1-800-372-6766) between 9 AM and 5 PM EST. IMPORTANT NOTE: Only the Servo-550 is designed to permit mono bridging; any attempt to do so with the Servo-260 or Servo-170 models may cause damage to the unit and will void your warranty. 9
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