Yorkville CR670 Owner's Manual
COMMERCIAL
70V
AUDIO
AMPLIFIER
COMMERCIAL 70V AUDIO AMPLIFIER
OWNER’S MANUAL
MANUEL DE L’UTILISTEUR
PO
WER
PO
WER
CLIP
/
PROTE
C
T
COMMERCIAL
70V
AUDIO
AMPLIFIER
COMMERCIAL 70V AUDIO AMPLIFIER
TYPE: YS1009
Manual-Owners-CR670-1v1.pdf
INSTRUCTIONS PERTAINING TO A RISK
OF FIRE, ELECTRIC SHOCK,
OR INJURY TO PERSONS.
CAUTION:
TO REDUCE THE RISK OF ELECTRIC SHOCK, DO
NOT REMOVE COVER (OR BACK).
NO USER SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.
Read Instructions:
The
Owner’s Manual
should be read and understood
before operation of your unit. Please, save these
instructions for future reference.
Packaging:
Keep the box and packaging materials, in case the unit
needs to be returned for service.
Warning:
When using electric products, basic precautions should
always be followed, including the following:
Power Sources:
Your unit should be connected to a power source only of the
voltage specified in the owners manual or as marked on the unit.
This unit has a polarized plug. Do not use with an extension cord or
receptacle unless the plug can be fully inserted. Precautions should
be taken so that the grounding scheme on the unit is not defeated.
Hazards:
Do not place this product on an unstable cart, stand, tripod, bracket or
table. The product may fall, causing serious personal injury and serious
damage to the product. Use only with cart, stand, tripod, bracket, or table
recommended by the manufacturer or sold with the product. Follow the
manufacturer’s instructions when installing the product and use mounting
accessories recommended by the manufacturer.
The apparatus should not be exposed to dripping or splashing
water; no objects filled with liquids should be placed on the
apparatus.
Terminals marked with the “lightning bolt” are hazardous live;
the external wiring connected to these terminals require installation
by an instructed person or the use of ready made leads or cords.
No naked flame sources, such as lighted candles, should be
placed on the apparatus.
Power Cord:
The AC supply cord should be routed so that it is unlikely that it will
be damaged. If the AC supply cord is damaged
DO NOT
OPERATE THE UNIT
.
Service:
The unit should be serviced only by qualified service personnel.
INSTRUCTIONS RELATIVES AU RISQUE
DE FEU, CHOC ÉLECTRIQUE, OU
BLESSURES AUX PERSONNES.
AVIS:
AFIN DE REDUIRE LES RISQUE DE CHOC ELECTRIQUE,
N’ENLEVEZ PAS LE COUVERT (OU LE PANNEAU
ARRIERE). NE CONTIENT AUCUNE PIECE REPARABLE
PAR L’UTILISATEUR.
CONSULTEZ UN TECHNICIEN QUALIFIE
POUR L’ENTRETIENT.
Veuillez lire le manuel:
Il contient des informations qui devraient êtres comprises avant
l’opération de votre appareil. Conservez S.V.P. ces instructions
pour consultations ultérieures
Emballage:
Conservez la boite au cas ou l’appareil devait être
retourner pour réparation.
Warning:
Attention: Lors de l’utilisation de produits électrique,
assurez-vous d’adhérer à des précautions de bases
incluant celle qui suivent:
Alimentation:
L’appareil ne doit être branché qu’à une source d’alimentation
correspondant au voltage spécifié dans le manuel ou tel qu’indiqué
sur l’appareil. Cet appareil est équipé d’une prise d’alimentation
polarisée. Ne pas utiliser cet appareil avec un cordon de
raccordement à moins qu’il soit possible d’insérer complètement les
trois lames. Des précautions doivent êtres prises afin d’eviter que le
système de mise à la terre de l’appareil ne soit désengagé.
Hazard:
Ne pas placer cet appareil sur un chariot, un support, un trépied ou une
table instables. L’appareil pourrait tomber et blesser quelqu’un ou subir des
dommages importants. Utiliser seulement un chariot, un support, un trépied
ou une table recommandés par le fabricant ou vendus avec le produit.
Suivre les instructions du fabricant pour installer l’appareil et utiliser les
accessoires recommandés par le fabricant.
Il convient de ne pas placer sur l’appareil de sources de flammes
nues, telles que des bougies allumées.
L’appeil ne doit pas être exposé à des égouttements d’eau ou des
éclaboussures et qu’aucun objet rempli de liquide tel que des vases
ne doit être placé sur l’appareil.
Les dispositifs marqués d’une symbole “d’éclair” sont des parties
dangereuses au toucher et que les câblages extérieurs connectés à
ces dispositifs de connection extérieure doivent être effectivés par un
opérateur formé ou en utilisant des cordons déjà préparés.
Cordon d’alimentation:
Évitez d’endommager le cordon d’alimentation.
N’UTILISEZ PAS
L’APPAREIL
si le cordon d’alimentation est endommagé.
Service:
Consultez un technicien qualifié pour l’entretien de votre appareil.
IMPORTANT SAFETY INSTRUCTIONS
SAFE_V4.doc Version 4.0 02/11/99 11:54 AM
TYPE: YS1009
1v5
Volume
Inputs
A B
Limiter
Output
Power Amp
AP
M
-18
-9 -3
-6
0 0
-6
-9 -3
-1.5
-
0
0
-
0
0
dBdB
LIMITER
PEAK
AVERAGE
Whe n ope ra tin g thi s pro du ct, e nsu re th at th er e i s ade qu ate
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* CL IP /
PRO TEC T LE
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Flas hin g = C LI PPI NG
or LIM IT ING
On = PR OT ECT M ODE *
*se e O wn er' s Man ua l
CHACH
B
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B
GND
AM P I NP UTS
IN PU T T ER MIN AL ST RI P W IR ING
MIN 8-OHMS
Bal an ced
GND
Unb al anc ed
GND
GAIN CONTROLS
CH
B
CH
A
70V SP EAK ER O UTP UT
OUTPUTS ARE IN PARALLEL
70V SP EAK ER O UTP UT
DES IGN ED AN D M ANU FACT UR ED BY YO RKV IL LE SOU ND • TO RON TO, CAN ADA
-1.5 -18
120VAC
60Hz
4.5A
CIRCUIT
BREAKER
PUSH TO RESET
A P
M
AUDIO PROCESSING
MODULE
PROFESSIONAL AU DIO AMPLIFIER
COMME RCIAL
70V
AUDIO
AMPLI FIER
Designed & Manufactured by Yorkville Sound • Toronto, Canada
-
12
0
dB
+12
-
12
0
dB
+120
dB
+550
dB
+55
TrebleBass
Mic 2
Gain
Mic 1
Gain
Mic 1 Mic 2
Clip
PROFESSIONAL AUDIO AMPLIFI ER
2
A P
M
AUDIO PROCESSING
MODULE
INTRODUCTION
Your new CR670 power amplifier is designed and built to provide years of trouble free performance. The CR670
is capable of powering large distributive loudspeaker systems as well as sound reinforcement loudspeakers
(plenty of headroom under the hood). Like all Yorkville Sound amplifiers, it is designed to be rugged and reliable
in all applications. The limiter has two modes of operation, which maintains the clarity of midrange signals, but
can also provide thumping bass notes. Generous output current capability along with low distortion and high
headroom performance guarantee the sonic integrity of the CR670 power amplifier.
Since the CR670 has been designed and manufactured by Yorkville Sound, each unit undergoes rigorous Quality
Assurance tests. Each circuit is tested by sophisticated computer controlled equipment (which is capable of identifying any deviation from the design center parameters). The final tests include a temperature cycled burn-in period.
INPUTS
The two input channels have independent gain controls that sum into one signal, which is amplified by the
power amplifier section.
Unbalanced Inputs
The Combi-jack and terminal strip can be used
to connect an unbalanced signal to the CR670.
Follow the directions in figure 3 through 5 for
the various unbalanced connections. If possible,
always use balanced cables, as they will reduce
the possibility of noise entering the sound system.
If unbalanced cables must be used, keep the
length of the cable as short as possible to mini-
Figure 1
Figure 2
mize the amount of noise picked up by the cable.
Balanced Inputs
The CR670 has high quality balanced inputs with
hum rejection. Three types of balanced input connectors are available. The Combi-jack input will
accept a standard 1/4-inch TRS (stereo) phone plug
or an XLR plug for balanced operation. The tip of
the 1/4-inch TRS (stereo) phone plug and pin 2 of
the XLR plug are the positive (hot) connections. A
terminal strip input allows for a direct-wired connection for installation applications. Use a forked lug for
a #6 screw to connect the input wires to the barrier
strip. Follow the directions in figures 1 & 2 (on the
sidebar) for the various balanced connections. We
recommend using balanced connections wherever
possible to ensure that the system is noise free.
Mono Operation
The CR670 is a mono amplifier. The loudspeaker
load is connected across the red and white binding posts with the positive lead of the loudspeaker
wire connected to the red channel binding post.
Optional* M2 Input Microphone
Mixer Module
Adding the optional M2 Input Microphone Mixer
Module can increase the versatility of a CR670. The
M2 module is a two-channel microphone mixer
complete with bass and treble controls. The module provides independent gain control of the two
microphone inputs, allows bass and treble control
of the music signal, then mixes its signal with the
summed signal from input channels A and B before
entering the limiter circuit.
*The M2 module can be ordered through any Yorkville dealer. A certified service technician MUST install the M2 module.
Figure 3
Figure 4
Figure 5
Figure 6
3
Volume
Input
s
A B
Limiter
Output
Power Amp
A P
M
Outputs
Two types of output connectors are on the output of the CR670. Heavy duty binding posts accept a banana plug,
or bare wire connection. A terminal strip output allows for a direct-wired connection for installation applications.
Use a forked lug for a #6 screw to connect the loudspeaker wires to the barrier strip.
The CR670 delivers up to 600 watts into an 8 ohm loudspeaker. Don't put anything less than an 8 ohm loudspeaker load across the speaker terminals or the amplifier may go into protection. Please read the section on
Designing and Installing 70 volt Audio Systems in your manual.
Gain Controls
The CR670's gain controls are located on the back of the amplifier. This prevents tampering with the gain controls when the amplifier is rack mounted. The
gain controls are calibrated in dB (decibels), corresponding to the audio voltage
present at the speaker output jacks. Where many amplifiers are used in an installation, the gain controls scaled in dB allow the user to precisely set the audio
output level of one CR670 amplifier relative to the other CR670 amplifier. This
only works if the amplifiers are receiving the same amplitude of input audio signal. The 0db or "full" position of the gain control refers to 70 volts RMS (which
equals 600 watts into 8 ohms) on the output of the amplifier when a 1.4 volt
RMS voltage is present at the input jacks. Placing the gain control in the -3dB position with 1.4 volt RMS voltage present
at the input jacks will result in a 49 volt signal (which equals 300 watts into 8 ohms) at the speaker output.
Limiter
The limiter switch located on the back panel of the amplifier changes the mode of the limiter. When the limiter
switch is in the "peak" position, the limiter acts as a peak limiter with a short decay
time. This allows the bass thumps in music to drive the output of the amplifier into
clipping for the duration of the thump, but will not heavily clip a continuous signal
like someone screaming into a microphone. When the limiter switch is in the "average" position the release time of the limiter is extended and the limiter acts more like
a leveler. This mode is useful for public address applications where the full headroom of the amplifier is utilized and the quality of the voice is maintained by using
the soft clipping feature of the limiter.
Short Circuit Protection
The CR670 is fully protected against all possible passive loudspeaker load conditions. It can operate with a "dead"
short continuously without damage (however, we don't recommend that you short your CR670 "just for fun").
Shorts create a lot of stress on the output devices. If a short is present on the output of the amplifier with a signal
passing through the amplifier then the protect LED will illuminate continuously and the amplifier will go into
"sleep mode" turning off the audio signal passing through the amplifier. After 8 seconds, the amplifier will allow
the signal to pass through the amplifier and check to see if the short has been removed. If the short is still present
the amplifier will go through the sleep mode cycle again. If the short has been removed, the amplifier will continue to drive the speaker.
Cooling & Thermal Protection
Passive cooling (this means that there isn't any fan in the amplifier) was chosen for this design to provide years
of maintenance free operation. In dusty locations dirt may settle on the heatsinks. If the amplifier is permanently
installed in a dusty location the heatsinks must be cleaned on a regular schedule.
When operating the CR670, care should be taken to allow adequate cooling around the heatsink fins along the
sides of the chassis and not to block the ventilation holes in the top and bottom covers of the chassis. The CR670
was designed to run cool under normal operating conditions, but restricting the airflow around or through the
amplifier could cause the amplifier to thermally shutdown.
If the temperature on the heatsinks of the CR670 exceeds the safe operation temperature, then the amplifier will
shutdown illuminating both protection LED's and turn off the audio signal to the speaker output jacks until the
heatsink temperature drops to a safe level.
Rack Mounting
The CR670 was designed to mount into a standard 19-inch rack. Care must be taken to provide adequate ventilation
around the amplifier. Here are some tips to ensure that the CR670 will have adequate cooling when mounted into a rack:
• Leave a blank rack space above and below the amplifier when stacking equipment into the rack.
• If several CR670s are stacked in a rack, in addition to the tip above, provide fan forced cooling from the bottom of the rack up through the amplifier stack.
The rack itself should have adequate ventilation to the outside air. Leave the front and back of the rack as open
as possible. If fans are used, draw the air in through the bottom front of the rack; drive the air up through the
amplifiers, allowing the air to vent out through the top back section of the rack.
Clip / Protection LED's
The clip/protection LEDs on the front panel will blink to visibly indicate any signal excursion beyond the dynamic
headroom of the amplifier. The clip/protection LEDs will remain on when the amplifier goes into its protection
mode. The CR670 will go into protection for one of three reasons:
• The power switch of the amplifier has just been turned on or off.
• The amplifier has a shorted speaker load on the output of the amplifier.
• The temperature on the heatsinks of the CR670 exceeds the safe operation temperature.
4
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