Radio Shack Stereo Amplifier PT4000 User Guide

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INSTALLATION GUIDELINES  
Stereo or Mono Inputs  
Connecting to standard AC power  
MONO OPERATION  
Your Pyle Pro amplifier can be operated in Stereo, Mono or  
Bridged mode, depending on the input source. If the input  
signal is mono, slide the Stereo/Mono/Bridged selector  
switch to MONO and the signal will be routed through both  
channels. If you wish to run the amplifier in bridged output  
mode, slide the switch to Bridged.  
After making all other connections, set the POWER switch  
to OFF position. Then connect the power cord to a standard  
AC outlet.  
Connecting the GND (Ground) screw terminal  
Connecting a mixer or preamplifier may cause excessive  
noise or hum in the amplifier output. To prevent this,  
connect one end of a low-capacitance shielded wire to the  
amplifier’s ground screw (on the rear panel). Then connect  
the other end of this wire to the ground terminal on the  
mixer or preamplifier enclosure.  
SWITCH IN “MONO” POSITION  
MONO  
CH A  
STEREO BRIDGE  
CH B  
Mounting the amplifier  
This amplifier is designed to accept standard rack mounting  
installations. Two slots on each end of the front panel make  
it suitable for such an installation.  
Speaker connections  
CH B  
CH A  
PREAMP OR MIXER  
OUTPUT  
You can connect 4 Ohm, 8 Ohm or 16 Ohm speakers to  
Channel A and/or Channel B of the amplifier. If you connect  
two pairs of speakers, be sure to follow these guidelines:  
CH  
B
CH  
A
+
+
CIRCUIT  
BREAKER  
INPUTS  
CH  
+
CH  
B
A
BRIDGE  
AC POWER IN  
Tightly secure four mounting screws (not supplied) through  
these fours slots and into your standard electronics equipment  
rack.  
CH  
B
CH  
A
MONO  
S
T
E
R
E
O
B
R
I
D
G
E
GND  
GROUND LIFT  
LIFT  
GROUND  
OUTPUT  
CH  
B
CH A  
+
+
• Speakers which are connected to the same channel are  
part of a pair, and must be of the same impedance.  
CIRCUIT  
BREAKER  
INPUTS  
CH A  
GROUND  
SCREW  
LOW CAPACITANCE SHIELDED WIRE  
+
CH  
B
BRIDGE  
AC POWER IN  
CH  
B
CH  
A
MONO  
STEREO BRIDGE  
GND  
GROUND LIFT  
LIFT  
Turning the amplifier on  
1. Turn on the audio input source equipment which is  
connected to the amplifier INPUT jacks.  
• Speakers connected to different channels are NOT part  
of a pair, and can be of different impedances.  
Input connections  
GROUND  
These amplifiers accept a broad range of input sources,  
including Compact Disc (CD) players; Cassette, Reel-to-Reel  
or other tape players; Radio Tuners; Equalizers; Signal  
Processors.  
1. Prepare the speaker wire by removing about 1 inch of  
insulation from the end of the speaker wire you intend to  
connect to the amplifier. Then twist the exposed wire to  
secure all the wire strands.  
2. Set the amplifier’s Channel A and Channel B output level  
gain controls to the minimum level settings.  
MONO SIGNAL SOURCE  
USE  
CHANNEL A  
INPUT ONLY  
Connecting a CD or tape player or tuner  
In a normal installation, one would use the RCA JACKS for  
connecting a CD player, tape player or tuner.  
3. Push in the power switch to turn the amplifier on.  
NOTE: Use 16-gauge speaker wire for lengths up to25  
feet; 14-gauge wire for lengths over 25 feet. It is  
recommended that you use the shortest length of wire  
possible.  
CAUTION! Do not use  
balanced and unbalanced  
inputs simultaneously!!  
Using the power meters  
OUTPUT  
CH  
B
CH  
A
+
+
The meter pointer position indicates the amplifier output  
power. For ease of reading in dark environments, the meter  
is illuminated.  
CIRCUIT  
BREAKER  
INPUTS  
CH  
Bridged Mode Operation  
This amplifier can operate in a mono bridged output mode, if  
your speakers can handle the following power output levels:  
+
CH  
B
A
BRIDGE  
AC POWER IN  
2. Connect the speaker wires to the speaker's positive and  
negative terminals.  
CH  
B
CH  
A
MONO  
STEREO BRIDGE  
GND  
GROUND LIFT  
LIFT  
GROUND  
NOTE: Most speaker terminals are either color-coded  
or have a mark that indicates the terminal's polarity.  
Usually positive terminals are red or have a plus symbol  
(+), and negative terminals are black or have a minus  
symbol (-).  
PT-3200: 600 watts  
PT-4000: 800 watts  
use RCA jacks  
Using the Left and Right Output Level controls  
Rotate output level gain clockwise to increase, or counter-  
clockwise to decrease the output power. To get the best  
performance with the least sound distortion, always adjust  
the output level gain so the meter's pointer does not  
continuously exceed the extreme right of the meter's scale.  
As shown in the diagram below, connect the speaker's positive  
(+) to the amplifier's red speakers left (A/B) terminals and  
negative (-) to red speakers right (A/B) terminals.  
CD PLAYER, TAPE PLAYER  
OR TUNER  
3. Connect the speaker wires to the amplifier's left and  
right speaker terminals according to the terminal color  
polarity.  
The speaker right (+) on the amplifier is used as a negative (-)  
terminal for a bridged connection.  
CAUTION: It is possible to overdrive the amplifier by  
setting output level gain too high, which may cause  
damage or failure.  
Connecting an equalizer or external signal processor  
Connect the processor’s OUT to the amplifier’s INPUT  
connectors.  
NOTE: The extra amplifier output of 6.35mm phone  
jacks can not be used for the bridged connection. It can only  
be used in normal (non-bridged) operation as a stereo speaker  
output.  
STEREO OPERATION  
OUTPUT  
+
CH  
B
CH  
A
+
CIRCUIT  
BREAKER  
SWITCH IN “STEREO” POSITION  
About the internal clip circuitry  
INPUTS  
CH A  
+
CH  
B
MONO  
BRIDGE  
CH B  
CH A  
Special clip circuitry incorporated into your Pyle Pro  
amplifier’s design protects the amplifier and speaker system  
from being damaged from overdriving power.  
AC POWER IN  
STEREO  
BRIDGE  
MONO BRIDGED OPERATION  
SWITCH IN “BRIDGED” POSITION  
CH  
B
CH  
A
MONO  
STEREO BRIDGE  
GND  
GROUND LIFT  
LIFT  
GROUND  
MONO  
CH B  
CH A  
STEREO  
BRIDGE  
Under normal conditions, the amplifier’s clip indicator will  
flicker as the output power momentarily exceeds the level  
as set by the output level gain selector.  
EQ OR MIXER  
CH B  
CH A  
However, under excessive output conditions, the clip  
indicator lights remain on continuously, alerting you that  
the special clip circuitry has become active. When this  
occurs, you should simply reduce the output power level  
by rotating the Master Volume control counterclockwise.  
OUTPUT  
CH  
B
CH A  
+
+
CIRCUIT  
DO NOT USE  
-OR–  
BREAKER  
INPUTS  
CH A  
BLACK TERMINALS  
+
CH  
B
BRIDGE  
AC POWER IN  
CH  
B
CH  
A
MONO  
STEREO BRIDGE  
OUTPUT  
GND  
OUTPUT  
GROUND LIFT  
LIFT  
CH  
B
CH A  
+
+
CH  
B
CH  
A
+
+
GROUND  
CIRCUIT  
CIRCUIT  
BREAKER  
BREAKER  
INPUTS  
CH A  
INPUTS  
CH A  
+
CH  
B
BRIDGE  
+
CH  
B
AC POWER IN  
BRIDGE  
AC POWER IN  
CH  
B
CH  
A
MONO  
STEREO BRIDGE  
GND  
GROUND LIFT  
LIFT  
CH  
B
CH  
A
MONO  
GROUND  
STEREO BRIDGE  
GND  
GROUND LIFT  
LIFT  
GROUND  
STEREO SIGNAL SOURCE  
EQ OR MIXER  
use XLR/6.35 mm  
combo jacks  
MONO SIGNAL SOURCE  
USE  
CHANNEL A  
INPUT ONLY  
CAUTION! Do not use  
balanced and unbalanced  
inputs simultaneously!!  
CAUTION! Do not use  
balanced and unbalanced  
inputs simultaneously!!  
2 – PYLE PRO PT3200/4000 Amplifier Owner’s Manual  
PYLE PRO PT3200/4000 Amplifier Owner’s Manual - 3  
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Caring for your Pyle Pro Amplifier  
Limited Warranty  
Your Pyle Pro Amplifier is an example of superior design  
and craftsmanship. The following suggestions will help you  
care for your amplifier so you can enjoy years of use:  
All PYLE PRO products are carefully constructed and tested before shipment.  
Units purchased in the USA are warranted to be free of defects in material  
and workmanship for two (2) years from the date of purchase. This warranty  
is limited to the original retail purchaser of the amplifier.  
• Keep the amplifier dry. If it gets wet, wipe immediately.  
• Use the amplifier only in well-ventilated installations.  
• Handle the amplifier gently and carefully - do not drop!  
• Keep the amplifier away from dust and dirt.  
• Wipe occasionally with a damp cloth to keep it looking  
new. Do not use harsh chemicals, solvents or  
detergents!  
Should the unit fail due to factory defects in material or workmanship, your  
unit will be repaired or replaced at the sole discretion of PYLE.  
To obtain warranty service, you must first call our Consumer Return Hotline  
at (718) 236-6948 to obtain a Return Authorization Number. This R.A. # must  
appear on the outside of your package and on all paperwork relating to your  
return.  
When returning the unit to us for warranty service, it must be carefully packed  
and shipped, prepaid, to:  
Resetting the circuit breaker  
This amplifier employs a circuit breaker for protection from  
power surges and short circuits. If the amplifier suddenly  
turns off or will not turn on, check the circuit breaker. If  
it is tripped, check and correct for a short or overload  
condition. Wait for the amplifier to cool, then press the  
circuit breaker RESET button on the back of the amplifier.  
R.A.#: _____________  
PYLE PRO Service Center  
1600 63rd Street  
Brooklyn, NY 11204  
You must also include the following items with your return:  
A copy of your sales receipt or other proof of purchase  
A brief letter, indicating the problem you are experiencing with the  
product  
Include in your letter your return address, daytime phone number and  
R.A. number  
Also include a check or money order for $15.00 for return shipping,  
handling and insurance, or provide your Visa/MC number with  
expiration date.  
Resetting the circuit breaker  
This amplifier employs a circuit breaker for protection from  
power surges and short circuits. If the amplifier suddenly  
turns off or will not turn on, check the circuit breaker. If  
it is tripped, check and correct for a short or overload  
condition. Wait for the amplifier to cool, then press the  
circuit breaker RESET button on the back of the amplifier.  
Our obligation under this warranty is limited to the repair or replacement of  
the defective unit when it is returned to us prepaid. This warranty will be  
considered void if the unit was tampered with, improperly serviced or subject  
to misuse, neglect or accidental damage.  
Amplifier Specifications  
PT3200  
PT4000  
Input Impedance, balanced (unbalanced)  
Continuous Output Power  
20 k-Ohms (10 k-Ohms)  
20 k-Ohms (10 k-Ohms)  
Stereo Mode  
20 Hz to 20 kHz, 8 Ohms  
1 kHz, 4 Ohms  
200W x 2  
300W x 2  
230W x 2  
350W x 2  
1600W x 2  
260W x 2  
400W x 2  
300W x 2  
450W x 2  
2000W x 2  
Maximum Power, 8 Ohms  
Maximum Power, 4 Ohms  
Peak Power, 8 Ohms  
Bridged Mode  
20 Hz to 20 kHz, 8 Ohms  
1 kHz, 8 Ohms  
500W x 1  
600W x 1  
3200W x 1  
700W x 1  
800W x 1  
4000W x 1  
Peak Power  
THD at rated output power  
0.1%  
10 Hz to 50 kHz  
1.0V  
0.1%  
10 Hz to 50 kHz  
1.0V  
Frequency Response +/– 3 dB  
Input Sensitivity for rated output power  
Signal-to-Noise Ratio A-Weighted  
100 dB  
100 dB  
Speaker Impedance  
Stereo  
Bridged  
4-16 Ohms  
8-16 Ohms  
4-16 Ohms  
8-16 Ohms  
Power Requirement  
120 VAC, 60 Hz  
120 VAC, 60 Hz  
Dimensions H x W x D, inches  
(mm)  
3 15/32 x 19 x 14  
(88 x 482 x 355)  
3 15/32 x 19 x 14  
(88 x 482 x 355)  
Weight, lbs (kg)  
30.6 (13.96)  
33.0 (15.1)  
4 – PYLE PRO PT3200/4000 Amplifier Owner’s Manual  
PYLE PRO PT3200/4000 Amplifier Owner’s Manual - 5  
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