PRO 200 Series
Amplifier Owner’s Manual
Intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.
Intended to alert the user of the presence of important operating and maintenance (servicing) instruc- 
tions in the literature accompanying the product.
CAUTION: Risk of electrical shock — DO NOT OPEN!
CAUTION: To reduce the risk of electric shock, do not remove cover. No user serviceable parts inside. Refer servicing to qualified service personnel.
WARNING: To prevent electrical shock or fire hazard, do not expose this appliance to rain or moisture. Before using this appliance, read the operating guide for further warnings.
Este símbolo tiene el propósito, de alertar al usuario de la presencia de “(voltaje) peligroso” sin ais-
lamiento dentro de la caja del producto y que puede tener una magnitud suficiente como para constituir riesgo de descarga eléctrica.
Este símbolo tiene el propósito de alertar al usario de la presencia de instruccones importantes 
sobre la operación y mantenimiento en la información que viene con el producto.
PRECAUCION: Riesgo de descarga eléctrica ¡NO ABRIR!
PRECAUCION: Para disminuír el riesgo de descarga eléctrica, no abra la cubierta. No hay piezas útiles dentro. Deje todo mantenimiento en manos del personal técnico cualificado.
ADVERTENCIA: Para evitar descargas eléctricas o peligro de incendio, no deje expuesto a la lluvia o humedad este aparato Antes de usar este aparato, Iea más advertencias en la guía de operación.
Ce symbole est utilisé dans ce manuel pour indiquer à l’utilisateur la présence d’une tension dangereuse pouvant être d’amplitude suffisante pour constituer un risque de choc électrique.
Ce symbole est utilisé dans ce manuel pour indiquer à l’utilisateur qu’il ou qu’elle trouvera d’impor- 
tantes instructions concernant l’utilisation et l’entretien de l’appareil dans le paragraphe signalé.
ATTENTION: Risques de choc électrique — NE PAS OUVRIR!
ATTENTION: Afin de réduire le risque de choc électrique, ne pas enlever le couvercle. Il ne se trouve à l’intérieur aucune pièce pouvant être reparée par l’utilisateur. Confiez I’entretien et la réparation de l’appareil à un réparateur agréé.
AVERTISSEMENT: Afin de prévenir les risques de décharge électrique ou de feu, n’exposez pas cet appareil à la pluie ou à l’humidité. Avant d’utiliser cet appareil, lisez attentivement les avertissements supplémentaires de ce manuel.
Dieses Symbol soll den Anwender vor unisolierten gefährlichen Spannungen innerhalb des Gehäuses warnen, die von Ausreichender Stärke sind, um einen elektrischen Schlag verursachen zu können.
Dieses Symbol soll den Benutzer auf wichtige Instruktionen in der Bedienungsanleitung aufmerksam 
machen, die Handhabung und Wartung des Produkts betreffen.
VORSICHT: Risiko — Elektrischer Schlag! Nicht öffnen!
VORSICHT: Um das Risiko eines elektrischen Schlages zu vermeiden, nicht die Abdeckung enfernen. Es befinden sich keine Teile darin, die vom Anwender repariert werden könnten. Reparaturen nur von qualifiziertem Fachpersonal durchführen lassen.
ACHTUNG: Um einen elektrischen Schlag oder Feuergefahr zu vermeiden, sollte dieses Gerät nicht dem Regen oder Feuchtigkeit ausgesetzt werden. Vor Inbetriebnahme unbedingt die Bedienungsanleitung lesen.
Important Safety Instructions
WARNING: When using electrical products, basic cautions should always be followed, including the following:
1.Read all instructions.
2.Keep all instructions.
3.Heed all warnings.
4.Follow all instructions.
5.Do not use this device near water.
6.Clean only with a dry cloth.
7.Do not block any of the ventilation openings. Install in accordance with manufacturer’s instructions.
8.Do not install near any heat sources such as radiators, heat registers, stoves or other apparatus that produce heat.
9.Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding plug. The wide blade or third prong is provided for your safety. If the provided plug does not fit into your outlet, consult an electrician.
10.Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point they exit from the apparatus.
11.Only use attachments/accessories provided by the manufacturer.
12.Use only with a cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tipover.
13.Unplug this device during lightning storms or when unused for long periods of time.
14.Refer all servicing to qualified service personnel. Servicing is required when the device is damaged in any way, such as liquid has been spilled or objects have fallen into the device, the unit has been exposed to rain or moisture, does not operate normally, or has been dropped.
15.Never break off the ground pin. Connect only to a power supply of the type marked on the unit adjacent to the power supply cord.
16.If this product is to be mounted in an equipment rack, rear support should be provided.
17.Exposure to extremely high noise levels may cause a permanent hearing loss. Individuals vary considerably in susceptibility to noise-induced hearing loss, but nearly everyone will lose some hearing if exposed to sufficiently intense noise for a sufficient time.
The U.S. Government’s Occupational and Health Administration (OSHA) has specified the following permissible noise level exposures:
Sound Duration Per Day In Hours |
Sound Level dBA, Slow Response |
8 |
90 |
6 |
92 |
4 |
95 |
3 |
97 |
2 |
100 |
1 1/2 |
102 |
1 |
105 |
1/2 |
110 |
1/4 or less |
115 |
According to OSHA, any exposure in excess of the above permissible limits could result in some hearing loss. Ear plugs or protectors inserted into the ear canals or over the ears must be worn when operating this amplification system in order to prevent a permanent hearing loss, if exposure is in excess of the limits listed above.To ensure against potentially dangerous exposure to high sound pressure levels, it is recommended that all persons exposed to equipment capable of producing high sound pressure levels be protected by hearing protectors.
SAVETHESE INSTRUCTIONS!
Table Of Contents
1 How To Use This Manual p.2
Introduction
Terms & Conventions
2 InstallationUnpacking p.3
Mounting
Cooling Requirements
Additional Guidelines
Maintenance
3 Features Overview p.7
Front Panel
Rear Panel
4 OperationStereo Modes p.13
Parallel
Bridged
5 ConnectionsPower p.15
Input
Output
6 SafetyUser Responsibilityp.19
Speaker Protection
Protection Circuitry
7 Service,Support Support & Warranty p.23
Contact Crest
Warranty
aSpecifications p.25
Wire Gauge Chart p.27
Contents
Appendices
p. 1
1How to use this manual
Introduction
Congratulations on your purchase of a Crest Audio Pro 200 Series power amplifier. Designed for years of reliable operation under rigorous use, these power amplifiers offer the sonic superiority and unsurpassed reliability for which Crest Audio is famous. Advanced technology and extensive protection circuitry allow more efficient operation, especially when working with difficult loads and power conditions.The Automatic Clip Limiting (ACL) circuit protects drivers, maintains sonic integrity and ensures trouble-free operation into loads as low as 2 Ohms.
Crest Audio’s high efficiency design uses tunnel-cooled heat sinks and variable-speed DC fans to maintain a lower overall operating temperature, resulting in longer output transistor life. Pro 200 Series models 8200, 7200 and 5200 use Crest Audio’s innovative Power Density circuitry and packaging.
Although these amplifiers are simple to operate and housed in ultra-strong steel chassis, improper use can be dangerous.These are very high-powered amplifiers that can put out high voltages and sizable currents at frequencies up to 30 kHz. Always use safe operating techniques with these amplifiers.
FORYOUR SAFETY, READTHE IMPORTANT PRECAUTIONS SECTION AS WELL ASTHE INPUT, OUTPUT AND POWER CONNECTION SECTIONS OF THIS MANUAL.
Conventions
Warnings
Procedures not to attempt.
a
What to look for on |
® |
the equipment display. |
Alerts, indicators, or prompts that may appear.
Feature insights.
of the manual containing
on the current topic or a related issue
information
p. 2
Installation 2
/ What to do with the shipping carton |
Unpacking |
/ Proper rack-mounting technique |
|
/ Keeping the amplifier cooled |
Mounting |
/ Tips for trouble free operation |
|
/ Routine maintenance practices |
Cooling |
|
Requirements |
Additional
Guidelines
Maintenance
p. 3
2Installation
Pro 200 Series Owner’s Manual
Unpacking
Upon unpacking, be sure to inspect the amplifier. If you find any damage, notify your supplier immediately. Only the consignee may institute a claim with the carrier for damage incurred during shipping. Be sure to save the carton and all packing materials. Should you ever need to ship the unit,use only the original factory packing.If the shipping carton is unavailable, contact Crest to obtain a replacement.
Mounting
Pro 200 Series amplifiers will mount in standard 19" racks. Rear mounting ears are also provided for additional support,which is recommended in non-permanent installations like mobile or touring sound systems. Because of the cables and connectors on the rear panel,a right-angle or offset screwdriver or hex key will make it easier to fasten the rear mounting ears to the rails.
Front Panel (8200 shown - 7200 & 5200 have the same dimensions)
Front
Height 3.47"/ 89 mm
Front Width 19"/483mm
Rear Panel
Rear Width 17"/432mm
Front
Height
3.47"/
88mm
For replacement |
+ |
packaging, call Crest |
Audio’s Customer Service Department directly.
see—service and support
Side Panel
Depth13.75"/349 mm (including rear support ears) 
p. 4
Installation 2
Cooling Requirements
Pro 200 Series amplifiers use a forced-air cooling system to maintain a low, even operating temperature. Air is drawn into the amplifier by fans on the rear panel, which passes over the cooling fins of the heat sinks and exhausts through the front grille. If either heat sink gets too hot, its sensing circuit will open the output relay, disconnecting the load from that particular channel. It is important to have an adequate air supply at the back of the amplifier, and enough space around the front of the amplifier to allow the cooling air to escape. If the unit is rack mounted, do not use doors or covers on the front of the rack; the exhaust air must flow without restriction. If you are using racks with closed backs, use fans on the rear rack panel to pressurize the rack to ensure an ample air supply. Also make sure there is one standard rack space opening for every three mounted power amplifiers.
a
Make certain that there is enough space around the front and rear of the amplifier to allow the heated air to escape. When mounting in a rack, try to avoid using doors or covers on the front and rear of the enclosure; the exhaust air must not be impeded
suggestion
In racks with closed backs allow at least one stan- dard-rack-space opening for every four amps.
Additional Guidelines
Make sure the mains voltage is correct and the same as that printed on the rear of the amplifier. Damage caused by connecting the amplifier to improper AC voltage is not covered by any warranty. See the Connecting Power section in Chapter 5 for more information on voltage.
Note — Always turn off and disconnect the amplifier from mains voltage before making audio connections. As an extra precaution, have the attenuators turned down during power-up.
Although Pro 200 Series amplifiers have AutoRamp circuitry, which raises the signal level gradually after the output relay closes, it is always a good idea to have the gain controls turned down during power-up. This will prevent speaker damage if there is a high signal level at the inputs. Whether you buy or make them, use high quality connections,input cables and speaker cables,along with a good soldering technique. Most intermittent problems are caused by faulty cables.
Consult the theWire Gauge Charts in Appendix C to determine proper gauges for different load impedances and cable lengths. Cable resistance robs amplifier power in two ways: power lost directly to resistance (I2R loss) and by lowering the total load impedance. Also make sure the mode switch is set correctly for the desired application. See Chapter 4 for more information on modes.
Maintenance
Pro 200 Series amplifiers require little routine maintenance.
When used in an extremely dusty or smoky environment , it should be periodically blown free (using compressed air) of any foreign matter that may have built up inside.
When used in an environment where residue from smoke/fog machines is regularly present, the amplifier(s) should be periodically checked (by authorized Crest service personnel) for build-up of that residue
Users will not need to make any adjustments to the amplifier during its lifetime. There are no user-serviceable parts or adjustments that require opening the unit.
p. 5
Loading...