4 Ohm per Speaker
Specifications
Power output: 105 watts per channel into 8Ω (stereo)
Frequency response: 20Hz to 50kHz
Total harmonic distortion: 0.2%
Damping factor: 100
Signal to noise ratio: 103dB
Speaker load impedance: 4Ω to 16Ω
Dimensions: 482 x 241 x 89mm
Weight: 7.7kg
Finish: steel chassis, anodized aluminium heat sink
Downloads
-
http://www.samsontech.com/site_media/legacy_docs/servo_170_260_550_man.pdf
https://www.allprosound.com/catalog/pdf/specpdf/Samson/servo_260.pdf
1: AC input
- Connect the supplied standard 3-pin
“
IEC
”
plug here.
2: Fuse holder
- In the Servo-260, insert a 6 amp, 250 volt fuse here for 115
volt operation, or a 3 amp, 250 volt fuse for 230 volt operation. In the Servo-170,
insert a 5 amp, 250 volt fuse here for 115 volt operation, or a 2.5 amp, 250 volt
fuse for 230 volt operation. In both models, we recommend the use of normal (as
opposed to slow-blow) fuses.
3: Push-Spring output connectors (left/right)
- Use these to connect the
Servo Amplifier to loudspeakers. Wiring is red hot, black ground
—
be sure to
observe these to maintain correct phase correlation.
4: 1/4" Unbalanced output connectors (left/right)
- Alternatively, these can be
used to connect the Servo Amplifier to loudspeakers. Wiring is tip hot, sleeve
ground
—
be sure to observe these to maintain correct phase correlation.
5: Heat sink
- Make sure this anodized aluminum heat sink is unobstructed
when the amplifier is powered on. In particular, when the Servo Amplifier is rack-
mounted, we recommend that you keep the rear of the rack open in order to
release heat. If your rack does not have a removable rear, space should be left
open on the front of the rack cabinet, especially immediately above the Servo
Amplifier
—
remember, heat rises!
6: Unbalanced input connectors (left/right)
- If you are using unbalanced
wiring and connectors, connect incoming signal to these unbalanced RCA-type
jacks (wiring is tip hot, sleeve ground). The Servo Amplifier accepts input levels
of any strength but needs at least 0 dBu to achieve maximum power.
7: Balanced input connectors (left/right)
- Connect incoming signal to these
electronically balanced 1/4" TRS (Tip/Ring/Sleeve) jacks, wired as follows: Tip
hot, Ring cold, and Sleeve ground. Use balanced three-conductor cabling and
TRS plugs wherever possible (unbalanced two-conductor plugs can also be
inserted into these inputs, but you
’
ll get better signal quality and less outside
noise and hum if you use balanced lines). The Servo Amplifier accepts input
levels of any strength but needs at least 0 dBu to achieve maximum power.
Setting Up and Using the Servo Amplifier
Setting up your Servo 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. 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).
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).
- Log in to post comments