Samson Servo 120a Users Manual
Safety Instructions/Consignes de sécurité/Sicherheitsvorkehrungen/Instrucciones de seguridad
ACHTUNG:
Sie dieses Gerät weder Regen noch Feuchtigkeit aussetzen.Um die Gefahr eines
Stromschlags zu verringern, sollten Sie weder Deckel noch Rückwand des Geräts ent-
fernen. Im Innern befinden sich keine Teile, die vom Anwender gewartet werden kön-
nen. Überlassen Sie die Wartung
qualifiziertem Fachpersonal.
gleichseitigen Dreieck soll den Anwender vor nichtisolierter “gefährlicher Spannung”
im Geräteinnern warnen. Diese Spannung kann so hoch sein, dass die Gefahr eines
Stromschlags besteht. Das Ausrufezeichen im gleichseitigen Dreieck soll den Anwender
auf wichtige Bedienungs- und Wartungsan leitungen aufmerksam machen, die im mit-
gelieferten Informationsmaterial näher beschrieben werden.
Wichtige Sicherheitsvorkehrungen
2. Bewahren Sie diese Anleitungen für den späteren Gebrauch gut auf.
3. Bitte treffen Sie alle beschriebenen Sicherheitsvorkehrungen.
4. Befolgen Sie die Anleitungen des Herstellers.
5. Benutzen Sie das Gerät nicht in der Nähe von Wasser oder Feuchtigkeit.
6. Verwenden Sie zur Reinigung des Geräts nur ein feuchtes Tuch.
7. Blockieren Sie keine Belüftungsöffnungen. Nehmen Sie den Einbau des Geräts nur
entsprechend den Anweisungen des Herstellers vor.
8. Bauen Sie das Gerät nicht in der Nähe von Wärmequellen wie Heizkörpern,
Wärmeklappen, Öfen oder anderen Geräten (inklusive Verstärkern) ein, die Hitze
erzeugen.
9. Setzen Sie die Sicherheitsfunktion des polarisierten oder geerdeten Steckers nicht
außer Kraft. Ein polarisierter Stecker hat zwei flache, unterschiedlich breite Pole. Ein
geerdeter Stecker hat zwei flache Pole und einen dritten Erdungsstift. Der breitere
zen.
es nicht geknickt werden kann. Achten Sie hierbei besonders auf Netzstecker,
Mehrfachsteckdosen und den Kabelanschluss am Gerät.
aus der Steckdose.
wendig, wenn das Gerät auf irgendeine Weise, beispielsweise am Kabel oder
gelangt sind, es Regen oder Feuchtigkeit ausgesetzt war, nicht mehr wie gewohnt
betrieben werden kann oder fallen gelassen wurde.
WARNING
: To reduce the risk of fire or electric shock, do not expose this unit to rain
or moisture. To reduce the hazard of electrical shock, do not remove cover or back.
alert the user to the presence of uninsulated "dangerous voltage" within the products
enclosure that may be of sufficient magnitude to constitute a risk of electric shock to
persons. The exclamation point within an equilateral triangle is intended to alert the
in the literature accompanying the product.
Important Safety Instructions
2. Keep these instructions for future reference.
3. Please heed all safety warnings.
4. Follow manufacturers instructions.
5. Do not use this unit near water or moisture.
6. Clean only with a damp cloth.
7. Do not block any of the ventilation openings. Install in accordance with the manu-
facturers instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or
other apparatus (including amplifiers) that produce heat.
9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polar-
ized plug has two blades with one wider than the other. A grounding type plug has
two blades and a third grounding prong. The wide blade or third prong is provided
for your safety. When the provided plug does not fit your outlet, consult an electri-
cian for replacement of the obsolete outlet.
convenience receptacles and at the point at which they exit from the unit.
by the manufacturer, or sold with the apparatus. When cart is
tion to avoid injury from tip-over.
when the unit has been damaged in any way, such as power supply cord or plug
damage, or if liquid has been spilled or objects have fallen into the unit, the unit
dropped.
PRECAUCION
: Para reducir el riesgo de incendios o descargas, no permita que este
aparato quede expuesto a la lluvia o la humedad. Para reducir el riesgo de descarga
eléctrica, nunca quite la tapa ni el chasis. Dentro del aparato no hay piezas susceptibles
de ser reparadas por el usuario. Dirija cualquier reparación al servicio técnico oficial. El
símbolo del relámpago dentro del triángulo equilátero pretende advertir al usuario de
pueden ser de la magnitud suficiente como para constituir un riesgo de descarga eléc-
trica a las personas. El símbolo de exclamación dentro del triángulo equilátero quiere
advertirle de la existencia de importantes instrucciones de manejo y mantenimiento
(reparaciones) en los documentos que se adjuntan con este aparato.
Instrucciones importantes de seguridad
2. Conserve estas instrucciones para cualquier consulta en el futuro.
3. Cumpla con todo lo indicado en las precauciones de seguridad.
4. Observe y siga todas las instrucciones del fabricante.
5. Nunca utilice este aparato cerca del agua o en lugares húmedos.
6. Limpie este aparato solo con un trapo suave y ligeramente humedecido.
7. No bloquee ninguna de las aberturas de ventilación. Instale este aparato de acu-
erdo a las instrucciones del fabricante.
8. No instale este aparato cerca de fuentes de calor como radiadores, calentadores,
9. No anule el sistema de seguridad del enchufe de tipo polarizado o con toma de
tierra. Un enchufe polarizado tiene dos bornes, uno más ancho que el otro. Uno
con toma de tierra tiene dos bornes normales y un tercero para la conexión a
tierra. El borne ancho o el tercero se incluyen como medida de seguridad. Cuando
el enchufe no encaje en su salida de corriente, llame a un electricista para que le
cambie su salida anticuada.
o aplastado, especialmente en los enchufes, receptáculos y en el punto en el que
salen de la unidad.
no lo vaya a usar durante un periodo de tiempo largo.
su aparato sea reparado cuando esté dañado de alguna forma, como si el cable de
corriente o el enchufe están dañados, o si se han derramado líquidos o se ha intro-
ducido algún objeto dentro de la unidad, si esta ha quedado expuesta a la lluvia o
ATTENTION:
Pour éviter tout risque d’électrocution ou d’incendie, ne pas exposer
cet appareil à la pluie ou à l’humidité.
Pour éviter tout risque d’électrocution, ne pas
ôter le couvercle ou le dos du boîtier.
Cet appareil ne contient aucune pièce rem-
plaçable par l'utilisateur. Confiez toutes les réparations à un personnel qualifié.
tension dangereuse et non isolée dans l’appareil. Cette tension constitue un risque
d’électrocution. Le signe avec un point d’exclamation dans un triangle prévient
produit.
Consignes de sécurité importantes
2. Conserver ces instructions pour toute lecture ultérieure.
3. Lisez avec attention toutes les consignes de sécurité.
4. Suivez les instructions du fabricant.
5. Ne pas utiliser cet appareil près d’une source liquide ou dans un lieu humide.
6. Nettoyez l’appareil uniquement avec un tissu humide.
7. Veillez à ne pas obstruer les fentes prévues pour la ventilation de l’appareil.
8. Ne pas installer près d’une source de chaleur (radiateurs, etc.) ou de tout équi-
pement susceptible de générer de la chaleur (amplificateurs de puissance par
exemple).
9. Ne pas retirer la terre du cordon secteur ou de la prise murale. Les fiches cana-
diennes avec polarisation (avec une lame plus large) ne doivent pas être modi-
fiées. Si votre prise murale ne correspond pas au modèle fourni, consultez votre
électricien.
tension, torsion,, etc.). Veillez à ce que le cordon secteur soit libre, en particulier à
sa sortie du boîtier.
d’inutilisation prolongées.
mage sur le cordon secteur, baisse de performances, exposition à la pluie, pro-
jection liquide dans l’appareil, introduction d’un objet dans le boîtier, etc.).
Copyright 2004, Samson Technologies Corp.
Samson Technologies Corp.
575 Underhill Blvd.
Syosset, NY 11791-9031
Table of Contents
Guided Tour 6
Front Panel
6
Rear Panel
The Servo 120a Protection Circuitry 9
Appendix A: Linearity vs. Frequency Sweep 11
Appendix B: Power Output vs. THD 12
4
Congratulations on purchasing the Samson Servo 120a Power 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 imple-
The Servo 120a is a single rack-space stereo power amplifier which is optimized for use in both professional and
channel input level controls, ten-segment LED meters, a Protection LED, and a convenient headphone jack and
speaker on/off switch for private cue monitoring. Suggested applications for the Servo120 include:
•
Amplification for nearfield monitors or cue headphones in both professional and project studios
-
superb audio specs and whisper-quiet performance (its convection cooling design means there is no fan),
along with its unique front-panel speaker on-off switch and dedicated headphone jack, make the Servo
•
-
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. For example, use
satel-
galore.
•
As an extension to a home hi-fi system
- The Servo 120a boasts professional specs which far exceed that
of most consumer products. For a real “studio” experience in your own home, try connecting your home
then connect your existing speakers to the Servo 120a’s outputs. If you fall in love with the sound (as we’re
sure you will), you might want to substitute a professional pre-amplifier for your existing hi-fi amp—and,
from there, you may well end up graduating to higher-level speakers. High quality sound is addicting—
don’t say we didn’t warn you!
- The Servo 120a can be used to effectively
drive PA speakers in installations such as classrooms and corporate conference rooms.
Onstage monitoring
- In small and medium-sized onstage areas (such as in clubs, lounges, etc.), the Servo
•
MIDI rack monitoring
- Taking only a single rack space, MIDI musicians can easily incorporate the Servo
typically output by devices such as synthesizers, samplers, and digital audio workstations.
well as a guided tour through its front and rear panels, step-by-step instructions for its setup and use, reference
appendices, and full specifications. You’ll also find a warranty card enclosed—please don’t forget to fill it out
and mail it in so that you can receive online technical support and so we can send you updated information
about these and other Samson products in the future.
SPECIAL NOTE: Should your unit ever require servicing, a
Return Authorization
number (RA) is
sary. Without this number, the unit will not be accepted. Please call Samson at 1-800-372-6766 for a Return
Authorization number prior to shipping your unit. Please retain the original packing materials and, if possible,
5
The Samson Servo 120a Power Amplifier utilizes the latest technology in professional power amplifier design.
• Power to spare - Each channel delivers 60 watts of power into 4 ohms (or, in Bridge mode, 120 watts into 8
ohms).
• Clean, crisp sound - Impressive audio specifications such as .01% THD, S/N of 105 dB, crosstalk of 75 dB,
and frequency response of 3 Hz to 65 kHz guarantee ultra-clean sound quality in any live or recording envi-
• Independent input level controls for each channel with 41-position detents.
• Ten-segment LED meters for each channel continuously display power output levels and allow you to cor-
• Front-panel Protection LED shows you at a glance overheating or faulty wiring conditions.
• Innovative front-panel Speaker on/off switch and dedicated headphone jack enables private cue monitor-
• Both electronically balanced 1/4" TRS and unbalanced RCA-type input connector jacks are provided along
with
5-way binding post output connectors
• Convection cooling (no fan) makes for whisper-quiet operation even in critical listening environments such
as recording studios.
• Unique bipolar circuit design that continuously keeps DC output during idling at or near 0 volts (thus keep-
the Servo 120a from applying power when unnecessary.
• 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.
• Toroidal transformer power supply.
• Rugged construction (an all-steel chassis with a titanium finish and a lightweight anodized aluminum heat
sink) makes the Servo 120a eminently roadworthy.
• Flexible design allows the Servo 120a to be used free-standing or, with the use of included rack ears,
• Three-year warranty.
• Last but certainly not least, value. The Samson Servo 120a has been designed from the ground up to deliver
excellent yet affordable sound quality.
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