PUBLIC ADDRESS
AMPLIFIER
INSTRUCTION
MANUAL
PL-60 SA
PL-120 SA
RISK OF ELECTRIC
SHOCK, DO NOT OPEN!
CAUTION: TO REDUCE THE RISK
OF ELECTRIC SHOCK, DO NOT
OPEN COVER. NO USER
SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.
PRECAUTIONS
30 WATT RMS X 2
60 WATT RMS X 2
WARNING: TO PREVENT FIRE
OR SHOCK HAZARD, DO NOT
EXPOSE UNITS NOT
SPECIFICALLY DESIGNED FOR
OUTDOOR USE TO RAIN OR
MOISTURE.
WAR NI NG: REMOVAL OF THE
COVER SHOULD ONLY BE PERFORMED BY QUALIFIED SERVICE
PERSONNEL - NOT USER SERVICEABLE. THE UNIT SHOULD
ALWAYS BE UNPLUGGED BEFORE
REMOVING THE COVER, AND
REMAIN UNPLUGGED WHILE THE
COVER IS REMOVED.
1.Unpacking
After removing the amplifier from the carton, inspect for any exterior damage to
the unit. If damage is noted, notify the carrier at once so that a claim can be
justified. Save all packing material. This is important when the claim is
processed.
2.Ventilation
To offset heat generated by the unit, it is necessary to provide ample ventilation
around the unit. Avoid blocking or impeding the ventilation holes on the unit. To
prevent unnecessary problems, install the unit in a place free from any
vibrations, direct sunlight, humidity or dust circulation.
3.Avoid spilling liquids or allowing materials to enter the cabinet
If the unit gets wet or any foreign material enters the cabinet, immediately
disconnect the A.C. line cord and consult your dealer or qualified technician.
200 NEW HIGHWAY, AMITYVILLE, NY11701
PHONE : 1-800-645-5516, 631-957-8700 IN METRO NY
http://www.specotech.com
IMPORTANT SAFETY INSTRUCTIONS
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with dry cloth.
7. Do not block any ventilation openings. Install in accordance with the
manufacturer’s 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 purpose of the polarized or grounding-type plug. A polarized
plug has two blades with one wider that the other. A grounding type plug has two
blades and a third grounding prong. The wide blade or the third prong are
provided for your safety. If the provided plug does not fit into your outlet, consult
an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched, particularly at plugs,
convenience receptacles and where connected to the apparatus.
11. Only use the attachments/accessories specified by the manufacturer.
12. Use only with the 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 tip-over.
13. Unplug this apparatus during lightning storms or when unused
for long periods of time.
14. Refer all servicing to qualified service personnel. Servicing is
required when the apparatus has been damaged in any way
such as power supply cord or plug is damaged, liquid has
been spilled or objects have fallen into the apparatus, the apparatus has been
exposed to rain or moisture, does not operate normally, or has been dropped.
15. Apparatus shall not be exposed to dripping or splashing and no objects filled with
liquids, such as vases, shall be placed on the apparatus.
16. Warning – To reduce the risk of fire or electric shock, do not expose this apparatus
to rain or moisture.
17. Caution – Use of any controls or adjustments or performance of procedures other
than those specified herein may result in hazardous radiation exposure.
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Controls and Connections
FRONT PANEL
REAR PANEL
FRONT PANEL
1) MIC L Volume control
2) MIC R Volume control
3) AUX-1 L Volume control
4) AUX-1 R Volume control
5) AUX-2 L Volume control
6) AUX-2 R Volume control
REAR PANEL
1) AC accessory outlet ( unswitched )
2) AC fuse holder
3) MOH output terminals
4) MOH output level control*
5) Manual muting terminals
6) TEL/PAGING input terminals (Balanced)**
7) TEL/PAGING output select switch ( L, L+R, R )
8) TEL/PAGING output level control
9) MIC VOX on/off switch
7) Bass Control
8) Treble Control
9) Balance control
10) MASTER Volume
11) Power on/off switch with Lamp indicator
12) Output level indicator
10) MIC output select switch ( L, L+R, R )
11) MIC (XLR connector) input
12) AUX-2 output select switch ( L, STEREO, R )
13) AUX-2 input RCA jacks
14) AUX-1 input RCA jacks
15) AUX-1 output select switch ( L, STEREO, R )
16) AUX output RCA jack
17) Speaker
18) AC power cord
output terminal*
*MOH = Music on hold
**TEL/PAGING=
general or emergency paging.
Connection input terminals for
**TEL/PAGING is not to be connected directly to a
telephone circuit or TNV circuit.
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FRONT PANEL
MIC L Volume control. Adjusts audio level of MIC L.
1)
2) MIC R Volume control. Adjusts audio level of MIC R.
3) AUX-1 L Volume control. Adjusts audio level of AUX-1 L.
4) AUX-1 R Volume control. Adjusts audio level of AUX-1 R.
5) AUX-2 L Volume control. Adjusts audio level of AUX-2 L.
6) AUX-2 R Volume control. Adjusts audio level of AUX-2 R.
7)
Bass Control. Low frequency tone control.
Treble Control. High frequency tone control.
8)
Balance control. Controls R CH and L CH volume levels balance.
9)
10)
Master Volume control. Controls all volume levels simultaneously.
11) Power on/off switch with LED indicator. Illuminates when power is on.
12) Output level indicator. Indicates power output. Do not overload amp.
REAR PANEL
1) AC accessory outlet (Unswitched). Unswitched AC Auxiliary outlet for a 120VAC
50/60Hz power source.
2) AC fuse holder.
3) MOH output terminals. Provided two MOH outputs 600 Ohm, 1 Volt
4) MOH output level control. Controls volume of MOH output. (Music on hold)
5) Manual muting terminals. Provides contact closure muting of the AUX-1~2 input during
paging.
6) TEL / PAGING balanced input terminals. Accepts a balanced telephone paging signal.
7) TEL / PAGING output select switch ( L , L+R, R ). Select output signal mode of
TEL/PAGING.
8) TEL / PAGING input level control. Controls audio level of telephone input.
9) MIC VOX on/off switch. MIC inputs include VOX muting switch during paging.
10) MIC output select switch ( L , L+R, R ). Select output signal mode of MIC.
11) MIC balanced input terminals. Accepts a balanced low impedance microphone signal.
12) AUX-2 output select switch ( L , STEREO, R ). Select output signal mode of AUX-2.
13) AUX-2 input RCA jacks. Accepts a high impedance input stereo audio signal.
14) AUX-1 input RCA jacks. Accepts a high impedance input stereo audio signal.
15) AUX-1 output select switch ( L , STEREO, R ). Select output signal mode of AUX-1.
16) AUX output RCA jacks. Provides connection for a booster amplifier . The booster input
impedance should be more than 600 ohms.
17) Speaker outputs. Speaker lines must be connected to “COM” and one (and only one) of
the remaining screw terminals.
18) AC power cord. AC power cord with three pin plug for a 120VAC 50/60 Hz, power source.
Do not use without the ground pin.
and 8 Ohm, 1 Watt.
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Note: MOH output features an internal selector jumper (factory set on AUX-1) AUX-1~2 when
background music is provided at the AUX inputs. MOH output function depends on the jumper
location or locations that are selected, see illustration on page 7.
Screw terminal designations: G-GND, HOT-Signal positive, COM-Signal negative/common.
Overcoming Ground Loop Problems
If the amplifier is mounted in a rack unit (Use rack mount part # PBM-RK2), or is used with
equipment having its own ground, it is necessary to ensure that ground loops and the associated
problems of hum on the output signal are not introduced by the ground wiring. (see warning)
Warning
To overcome this problem if it occurs, the electrical and the mechanical ground on the amplifier
may be separated by completely removing the wire connecting the power source to ground.
CONSULT AN ELECTRONICS TECHNICIAN TO ACCOMPLISH THIS TO AVOID POTENTIAL
PERSONAL INJURY OR A HAZARDOUS CONDITION.
SPEAKER CONNECTION
The rear panel of the amplifier contains a 4 screw terminal strip for R and L speaker connection.
BE SURE TO CONNECT SPEAKERS PROPERLY, see line voltage instructions below.
The speaker lines are to be connected directly between the appropriate COM terminal on the 4 screw
terminal strip and the terminal corresponding to the impedance of the R and L speaker(s) .
(refer to figure 3).
Connect the cables to the terminals on the 4 screw terminal strip provided. Use the screw terminals
which correspond to the R and L speaker(s). One lead must always be connected to the COM.
This is just an example. If in doubt consult a qualified technician.
FIGURE 3
IMPORTANT NOTICE: When the 70V constant line voltages are used, a line
matching transformer must be used with each speaker. All
transformers must be connected in parallel.
HOW TO CONNECT LINE MATCHING TRANSFORMERS IN PARALLEL
ALWAYS CONNECT LINE TRANSFORMERS IN PARALLEL
NEVER CONNECT LINE TRANSFORMERS IN SERIES
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SPEAKER IMPEDANCES:
Speaker terminal taps for 70V constant line voltage are provided on the rear panel of the unit. To
connect the power output directly to a speaker or PA horn or a combination of speakers and/or PA
horns, connect to the COM and L and R tap on the terminal strip. Be sure the speaker(s) or PA
horn(s) is capable of handling a reasonable power output from the amplifier or permanent damage to
the speaker(s) or PA horn(s) may result. Also, be careful not to overload the amplifier with too many
speakers or PA horns. If it is desired to use a number and variety of speakers, the speakers must be
arranged in various series or parallel arrays to provide proper impedance matching. 70V constant line
voltage must be used (parallel connection only). If you are not familiar with impedance matching,
consult a professional installer or technician for advice. If 70V constant line voltages are used, a line
matching transformer must be used with each speaker. Again do not overload or use incompatible
speakers. Line transformers
are the preferred method for multi-speaker installation.
CABLE REQUIREMENTS
Output cabling need not be shielded in most cases and should be of sufficient gauge to minimize
losses due to the resistance of the wire over long runs (insertion loss). Cable thinner than 18
gauge is not recommended. Long runs require 16 gauge or heavier.
In some cases, where the output cable
is run in close proximity to unshielded intercom cables,
electrical cables, radio transmission antennas or other sources of interference, or when the
amplifier is being used for paging from a telephone system, the amplifier may require shielded
output cabling to prevent audio feedback or interference.
PRIORITY PAGE: THE AMPLIFIER FEATURES A VOICE ACTIVATED PRIORITY PAGE CIRCUIT
AND AUTOMATICALLY MUTES ALL PROGRAM MATERIAL (TUNER/TAPE/CD,ETC.) FROM THE
AMPLIFIERS OUTPUT, AND PERMITS MIC 1 AND THE TELEPHONE INPUT TO
OVERRIDE FOR PAGING ANNOUNCEMENTS.
TELEPHONE LINE: A TELEPHONE LINE INPUT OF 600 OHM IS PROVIDED.
THERE ARE MANY OTHER FEATURES OFFERED. PLEASE READ MANUAL COMPLETELY.
WHENEVER IN DOUBT ABOUT INSTALLATION, CONSULT WITH A PROFESSIONAL
INSTALLER OR TECHNICIAN OR PERSONAL INJURY, DAMAGE TO THIS AMPLIFIER
AND/OR SPEAKERS MAY RESULT AND YOUR WARRANTY MAY BE VOIDED.
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MUSIC ON HOLD AND PHANTOM POWER JUMPER POSITIONING
These adjustments are to be made by qualified technical personnel – Be certain unit is
disconnected from A/C power source prior to removing unit’s cover or electrical shock or injury
may result. The unit provides a Phantom Power DC 15V for condenser microphone .
Jumper location is to enable (ON) or disable (OFF) Phantom Power feature.
Note: Units come with Phantom Power enable (ON).
Jumper location to select AUX input for music on hold output.(MOH on above
diagram)
Note: Units come with jumper set on AUX-1.
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SPECIFICATIONS
Type Public Address Mixer Power Amplifier
Model No. PL-60SA PL-120SA
Power supply AC 117V, 50/60Hz AC 117V, 50/60Hz
Rated output power
Frequency response
Total harmonic
distortion
Input
sensitivity and
impedance
S/N Ratio
Speaker outputs
30W RMS X 2 60W RMS X 2
50~15 KHz ±3dB 50~15 KHz ±3dB
1% or less at 1 KHz at rated output 1% or less at 1KHz at rated output
TEL :200mV/600 Ohm, Balanced
MIC: 1.0mV/600 Ohm, Balanced
AUX-1~2 : 200mV/50K Ohm, Unbalanced
EQ/MIX IN : 1V/50K Ohm, Unbalanced
MIC Better than 60 dB
TEL Better than 60 dB
AUX-1~2 Better than 70 dB
70V Stereo line outputs 70V Stereo line outputs
TEL :200mV/600 Ohm, Balanced
MIC : 1.0mV/600 Ohm, Balanced
AUX-1~2 : 200mV/50K Ohm, Unbalanced
EQ/MIX IN : 1V/50K Ohm, Unbalanced
MIC Better than 60 dB
TEL Better than 60 dB
AUX-1~2 Better than 70 dB
AUX output
*MOH output
Mute level
350mV/600 Ohm
600 Ohm @ 1V and
8 Ohm - 1Watt
AUX-1~2≧ 40 dB AUX-1~2≧ 40 dB
Phantom Power
MIC
Tone control
Dimensions
16 V DC 16 V DC
Bass: ± 10 dB at 100Hz
Treble: ±10 dB at 10KHz
430mm(W)x88mm(H)x300mm(D)
16.9”(W)x3.5”(H)x11.8”(D)
Weight Approx 18.7 lbs (8.5 kgs) Approx 22 lbs (10.0 kgs)
Finish
Mounting
Table top or 19” rack mountable
options
*MOH = Music on hold **Factory set : -40dB
(Use # PBM – RK2 rack mount bracket)
350mV/600 Ohm
600 Ohm @ 1V and
8 Ohm - 1Watt
Bass: ± 10 dB at 100Hz
Treble: ±10 dB at 10KHz
430mm(W)x88mm(H)x300mm(D)
16.9”(W)x3.5”(H)x11.8”(D)
Table top or 19” rack mountable
(Use # PBM – RK2 rack mount bracket)
200 NEW HIGHWAY, AMITYVILLE, NY11701
PHONE : 1-800-645-5516, 631-957-8700 IN METRO NY
http://www.specotech.com
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