Clarity SMB-200 User manual

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CSP SMB-200
Issue 2
[phone]
SMB-200
200 WATT 2-CHANNEL POWER AMPLIFIER
INTRODUCTION
These instructions contain the specifications and
information necessary to install, operate, and maintain
the SMB-200, 200 Watt 2-Channel power amplifier
manufactured by Clarity, 1111 Industry Avenue,
Roanoke, VA 24013.
"WARNING: To reduce the risk of fire or
electric shock, do not expose this appliance
to rain or moisture."
"WARNING: Shock Hazard - Do Not Open."
"AVIS: Risque de Choc Electrique ne pas
Ouvrir."
SPECIFICATIONS
Purpose
The SMB-200 2-Channel Power Amplifier provides
up to 100 watts of audio power per channel in the
2-channel mode and 200 watts of audio power in
bridge mode for voice paging or background music
systems.
Applications
•Clarity Paging and Sound Reinforcement
Systems
•Clarity Stand Alone Background Music Systems
Refer to Figure 1 for a block diagram of a typical
installation.
Features
- 100 watts per channel
- Shelf or rack mount (optional rack kit SMA-RMK)
- Volume control for each channel
- ON/OFF switch
- Circuit breaker protection
- Overload limiting circuit protection
- Phono jacks for input connections
- Screw terminals for output connections
- Power "ON" indicator per channel
- Clipping indicator per channel
- 2 ohm output 2-channel, 4 ohm output bridge
Dimensions and Weight
•17.1" W x 14.75" D x 3.9" H
(43.43 cm W x 37.38 cm D x 9.9 cm H)
•24 lbs (10.8 kg)
Accessories
•SMB-101 Wall or shelf mount 100 watt
2-channel transformer unit (25,70,100 volt)
•SMB-102 Wall or shelf mount 200 watt
1-channel transformer unit (70,100 volt)
•SMB-201 Rack mount 100 watt 2-channel
transformer unit (25,70,100 volt)
•SMB-202 Rack mount 200 watt 1-channel
transformer unit (70,100 volt)
•SMA-RMK Rack mount kit
Nominal Specifications
Wattage Output 100 Watts RMS per channel
200 Watts RMS Bridge
Type Outputs 2- channel mode, 2 Ohms
Bridge mode, 4 Ohms
Frequency Response 50-25 kHz + 2 dBm
Distortion <.5% @ 1 kHz Rated Output
S/N <80 dBm
Input Impedance 10 K Ohms
Sensitivity 500 mVRMS
Contour roll off 300 Hz 6dBm per octave
Mounting Wall or Rack
Power Requirements
Voltage 120 Vac
Current 5.0 Amps
947443

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SMB-200 2-CHANNEL POWER AMPLIFIER
5-CHANNEL MIXER 4-CHANNEL POWER-
MIXER-AMPLIFIER
Booster
Output
FIGURE 1
Clarity
Audio
Output
Environment
Temperature 0 to 50°C
Humidity 0 to 85% non-precipitating
DESIGN
The SMB-200 100 Watt 2-Channel Amplifier is
designed to provide 100 watts of audio power in the
2-channel mode or 200 watts in the bridge mode.
The SMB-200 amplifier can be used to operate 2
Ohm speaker loads in the 2-channel mode or a 4
Ohm load in the 200 watt bridge mode.
The amplifier has an input volume control for each
channel located on the back of the unit.
Circuit breakers are provided on the back of these
units and will operate in the event of a catastrophic
overload. The 2-channel amplifier contains limiting
circuits for protection against short circuits or
impedance mismatches. The units will shut down in
the event of a trouble condition and reactivate
automatically when the condition is corrected.
The amplifiers can be either shelf or rack mounted
(rack mount kit is optional).
INSTALLATION
General
Figure 2 shows volume control locations. Figure 3
shows output terminal strips and switches on the back
of the amplifier as well as typical connections to a
mixer-amplifier.
Mounting
The SMB-200 is designed for shelf or rack mounting.
Make certain the unit is not mounted near heat
sources or strong magnetic fields. Verify control and
terminal strip accessibility. The unit may be rack
mounted. Order the associated rack mount kit
SMA-RMK.
Input Connections
High impedance auxiliary devices such as mixers,
equalizers, mixing boards, etc. can be connected to
channel A or B. Phono jacks are provided at the rear
of the amplifier for each channel input.
Speaker Cabling
Standard two conductor speaker wire can be used
(14-20 AWG determined by the load).
Amplifier Setup
During initial system set up, it is recommended that
the channel A and B input gain controls be set 1/4
turn clockwise.

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All connections should be made to the
amplifier and double-checked before the ac
power cord is plugged in.
The power indicators will illuminate when the ac
power cord is plugged in and the power switch is in
the "ON" position.
OPERATION
General
The SMB-200 provides two modes of operation,
2-channel (100 watts per channel) or 1-channel mono
(200 watts bridged).
When the amplifier is in the 2 channel mode signals
are applied to both the channel A and B inputs.
Channel A and B outputs are connected to their
respective speaker loads. The output levels are
controlled by the channel input volume controls. In
the event that low frequency content is not required to
the speaker load, i.e. paging horns, the contour switch
may be operated to the ON position and frequencies
below 300 Hz will be reduced at a rate of 6 dBm per
octave.
When the amplifier is used in the bridge mode the
switch located on the back of the amplifier is
operated to the bridge mode position. The input
signal is applied to Channel A. The speaker load is
connected between the Channel A and Channel B 2
ohm output terminals. Channel A volume control is
used to adjust the volume level; of the speakers. In
the event that low frequency content is not required to
the speaker load, i.e. paging horns, the contour switch
may be operated to the ON position and frequencies
below 300 Hz will be reduced at a rate of 6 dBm per
octave.
Clipping lights are provided on the front of the unit.
These lights will illuminate when the output signal
exceeds the power rating of the amplifier.
There are 2 power lights located on the front of the
unit that will illuminate when the unit is connected to
a 120 Vac power source and the power switch is in
the ON position.
TECHNICAL ASSISTANCE
When trouble is reported, verify that AC power is
being supplied to the unit and there are no shorts or
grounds on speaker cabling. Assistance in trouble-
shooting is available from the factory. When calling,
you should have a VOM and a telephone test set
available and be calling from the job site. Call (540)
427-3505 and ask for Technical Support. Visit our
website at http://www.clarity-com.com.
CLARITY maintains service facilities in Roanoke,
VA. Should repairs be necessary, attach a tag to the
unit clearly stating company name, address, phone
number, contact person and the nature of the problem.
Send the unit to:
Repair and Return Dept.
Clarity
5614 Hollins Road
Roanoke, VA 24019-5056
TROUBLESHOOTING CHART
PROBLEM POSSIBLE SOLUTION
No output. 1. Verify AC power is being supplied to the unit and the power switch
is in the "ON" position and both power lights are illuminated.
2. Verify that input signal is present at amplifier connection.
3. If speaker controller or equalizer is not being used, make sure that
effects switch is in the "OFF" position.
4. Verify all speaker wiring (no opens, shorts or grounds).
Distorted output. 1. Check input wiring for proper polarity connections.
2. Verify that speaker load does not exceed amplifier rating.
3. Verify input signal does not exceed input voltage rating.
4. Verify all speaker wiring (no opens, shorts or grounds).

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LIMITED WARRANTY
Clarity warrants its products to be free from defects in materials and workmanship under conditions of normal use and service
for a period of one year from the date of shipment. The obligation under this warranty shall be limited to the replacement, repair
or refund of any such defective device within the warranty period, provided that:
1. Inspection by Clarity indicates the validity of the claim;
2. The defect is not the result of damage, misuse, or negligence after the original shipment;
3. The product has not been in any way repaired by others and that factory sealed units are unopened (A service charge
plus parts and labor will be applied to units defaced or physically damaged);
4. Freight charges for the return of products to Clarity are prepaid;
5. All units 'out of warranty' are subject to a service charge. The service charge will cover minor repairs (major repairs
will be subject to additional charges for parts and labor).
This warranty is in lieu of and excludes all other warranties expressed or implied, and in no event shall Clarity be liable
for any anticipated profits, consequential damages, loss of time or other losses incurred by the buyer in connection
with the purchase, operation or use of the product.
This warrantyspecifically excludes damage incurred in shipment. In the event a product is received in damaged condition, the
carrier should be notified immediately. Claims for such damage should be filed with the carrier involved in accordance with the
F.O.B. point.
FIGURE 2 - LOCATION OF POWER SWITCH/VOLUME CONTROLS
Clarity
Clarity
or
200W
100W 100W
Equalizer
5-Channel Mixer
4 Channel
Power Mixer
Amplifier Booster
Output
FIGURE 3 - CONNECTIONS
Aux Out
CLARITY MODEL NO. SMB-200
CHANNEL A
CIRCUIT
BREAKER
CHANNEL B
CIRCUIT
BREAKER
CHANNEL B CHANNEL A