PYLE Audio Stereo Amplifier PTA3000 User Guide

PROFESSIONAL POWER AMPLIFIER  
PTA3000  
OPERATING GUIDE  
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12. Use only with a cart, stand, tripod, bracket, or table specified by the manufacture, 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. Never break off the ground pin. Write for our free booklet “Shock Hazard and Grounding”.  
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 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 US Government’s Occupational and Health Administration (OSHA) has specified the  
following permissible noise level exposures:  
Sound Level dBA, Slow Response  
Duration Per Day In Hours  
8
90  
92  
6
4
95  
3
97  
2
1 1/2  
1
100  
102  
105  
110  
115  
1/2  
1/4 or less  
According to OSHA, any exposure in excess of the above permissible limits could result in  
some hearing loss. Ear plugs or protectors to the ear canals or over the ears must be worn when  
operating this amplification system in order to prevent permanent hearing loss, if exposure is  
in excess of the limits as set forth 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 such as this amplification system be protected by  
hearing protectors while this unit is in operation.  
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SERIES PROFESSIONAL POWER AMPLIFIER  
Thanks for choose our series amplifier. The amplifier features a two-way crossover and  
sub-sonic (low-cut) filter for each channel. Crossover frequencies are fixed at 150 Hz, allowing  
subwoofers to be driven at extremely high sound pressure levels, and the filters cut at 40 Hz to  
prevent low-end rumble. Using proven technology gained through years of amplifier design, this  
unit takes advantage of rugged TO-3P output devices mounted on massive aluminum extrusions  
and dissipates heat via an extremely quiet and effective two-speed fan. The amplifiers employ  
mammoth toroidal power transformers and offer impressive specifications and features not found  
on similarly priced competitive units. This amp is designed to drive a 2-Ohm load per channel,  
thus achieving awesome performance levels into 4 Ohms in BRIDGE mode. The amplifiers are  
ruggedly constructed, rack-mountable pieces of gear with superb patching capability, allowing  
superior flexibility in application. Front panel features include calibrated, detented gain (dB)  
controls and LED indicators for power, signal presence (SIG), clip and fault, as well as a rocker  
mains POWER switch. The back panel contains an IEC connector for the mains power cord,  
a mains circuit breaker with reset, and 2 critical cooling fan opening. This opening should have an  
adequate supply of cool air and should never be blocked or restricted. Also on the back panel are  
the input and output sections, including an input barrier strip for permanent installation. Each  
channel inputs section includes a combo XLR/ 1/4"phone jack connector. THRU/LOW out and  
HIGH out 1/4" jacks, and activation switches for the LOW CUT filter and crossover  
(150Hz X OVER). Channel output sections feature dual shock-proof binding posts and four  
conductor Speakon connectors. An additional four-conductor Speakon connector allows BRIDGE  
mode output.  
UNPACKING  
Inspect the amplifier during unpacking. If any damage is found, notify your dealer immediately.  
Be sure to save the carton and all packing materials. Should you ever need to ship the unit back  
to Sixstar DJ, one of its service centers, or the dealer: use only the original factory packing.  
INSTALLATION  
The professional power amplifiers are design for durability in commercial installations and  
provide the quality performance required in studio and home applications. They are two-rack-  
space units of 16" (406mm) depth designed to mount in a standard 19" rack. Rear mounting  
ears are provided for additional support. The minimum rack depth required from the mounting  
surface is 17" (432mm) to allow adequate connector clearance.  
BASIC SETUP  
Rack mount the amplifier in the location where it is to be used, remembering to allow for  
adequate access and cooling space. Make all the connections to the proper INPUT connectors  
on the desired channel. Select the proper mode configuration (STEREO or BRIDGE). Connect  
speakers to the proper OUTPUT connectors, reviewing carefully the impedance and phase  
considerations. With the POWER switch OFF, connect the IEC cord (7) to the amplifier and then  
to a suitable electrical outlet to allow proper current draw. With both channel gain (dB) controls  
at their fully counterclockwise settings, turn the POWER switch to ON, and slowly raise the gain  
controls to desired settings. Please carefully review this manual. It covers all this information in  
greater detail.  
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FRONT PANEL FEATURES  
(1) INPUT GAIN (dB)  
These controls are used to adjust the input gain of each channel. They determine how loud each  
channel of the power amplifier will sound for a given input signal level. Maximum input gain is  
achieved at the fully clockwise setting, and this setting yields maximum mixer/system  
headroom. A setting of less than fully clockwise will yield lower system noise at the expense of  
mixer/system headroom. Turning the control fully counterclockwise is the off setting . It is  
always a good idea to power up any new installing at this setting to protect the system  
loudspeakers.  
(2) POWER LED (POWER)  
These indicators illuminate when the AC mains power is being supplied to the amp and both  
channels are operational. If either channel experiences fault conditions, exceeds safe operating  
temperature limits, or if the mains circuit breaker trips; both channel power LED will be dark,  
indicating shutdown. If the BRIDGE mode is selected, the indicator on channel B will remain  
dark as a positive indication of this mode selection.  
(3) SIGNAL ACTIVITY LEDS (SIGNAL)  
These indicators illuminate when the associated channel output signal level exceeds 1 V RMS.  
(4) OVERLOAD LEDS (CLIP)  
These indicators illuminate when the associated channel has been overloaded.  
(5) FAULT LEDS (FAULT)  
These indicators illuminate when the amplifier just turned on or if the amplifier is detected  
some problem inside such as overheat or circuit problem so that can protect the amplifier.  
(6) POWER SWITCH  
This heavy-duty, rocker-type switch turns on the mains power to the amplifier. When the mains  
power is applied, there is a three-second delay in activation of the unit. This reduces/eliminates  
the turn-on transients associated with the system equipment connected to the amplifier and  
protects loudspeakers.  
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BACK PANEL FEATURES  
(7) IEC MAINS CONNECTOR  
This is a standard IEC power connector. An AC mains cord having the appropriate AC plug and ratings for  
the intended operating voltage is included in the carton.  
U.S. DOMESTIC AC MAINS CORD  
The mains cord supplied with the unit is a heavy-duty, 3-conductor type with a conventional 120 VAC plug  
with ground pin. It should be connected to an independent circuit capable of continuously supporting at  
least 15 amps. This is particularly critical for sustained high-power applications. If the outlet used does not  
have a ground pin, a suitable grounding adapter should be used and the third wire grounded properly.  
Never break off the ground pin on any equipment. It is provided for your safety.  
The use of extension cords should be avoided but, if necessary, always use a 3-wire type with at least a  
#14 AWG wire size. The use of lighter wire will severely limit the power capability of this amplifiers.  
Always use a qualified electrician to install any new electrical equipment. To prevent the risk of shock or  
fire hazard, always be sure that the amplifier and all associated equipment is properly grounded.  
NOTE: FOR UK ONLY.  
If the colors of the wires in the mains lead of this unit do not correspond with the colored markings identifying  
the terminals in your plug, proceed as follows (1) The wire that is colored green and yellow must be  
connected to the terminal that is marked by the letter E, the earth symbol, colored green, or colored green  
and yellow. (2) The wire that is colored blue must be connected to the terminal that is marked with the  
letter N or the color black. (3) The wire that is colored brown must be connected to the terminal that is  
marked with the little L or the color red.  
(8) BINDING POST OUTPUTS  
Shockproof binding post speaker outputs are provided on the amplifier. For each channel, the outputs are in  
parallel and the speaker connection cables can be terminated with banana plugs or stripped wires for use in  
the binding post terminals, or can be connected using the Speakon outputs (9). For sustained high-power  
applications, either outputs can be used, however, exercise care to assure the correct speaker phasing.  
The red binding posts are the signal outputs from each channel, and the black binding posts are chassis  
ground. The red binding post should be connected to the positive inputs of the associated loudspeakers.  
For BRIDGE mode operation, only the red binding posts are used and the associated loudspeaker load is  
connected between the two red posts.  
WARNING: Regardless of what connections are used, the minimum parallel speaker load should always  
be limited to 2 ohms per channel or 4 ohms BRIDGE mode for any applications. Operation at loads of 4 ohms  
per channel, or 8 ohms BRIDGE mode, is more desirable for sustained operation applications because the  
amplifier will run much cooler at this loading. Operation above 4 ohms per channel and even open-circuit  
conditions can always be considered safe, but sustained operation at loads below 2 ohms could result in  
temporary amplifier shut down due to the thermal limit circuitry.  
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(9) SPEAKON OUTPUTS  
The amplifiers utilize three 4-conductor Speakon connectors, one for each channel and one for BRIDGE  
mode. Please refer to the BRIDGE MODE section of this manual before attempting to use this mode.  
For each channel Speakon, the same impedance rules apply as with the binding posts. Internally, all the  
Speakons are wired in what is called the “high current” mode with pins 1+ and 2+ in parallel, and pins 1-  
and 2- in parallel. For the CHANNEL A and CHANNEL B Speakons, the respective channel output  
appears on pins 1+ and 2+. Pins 1- and 2- are chassis ground. For the BRIDGE Speakon. CHANNEL A  
appears on pins 1+ and 2+, and CHANNEL B appears on pins 1- and 2-. Always check the Speakon  
connector wiring carefully before using.  
(10) MODE SWITCH  
This switch is used to select STEREO or BRIDGE mode operation. It is a conventional push-push type,  
requiring a small “tool” to activate. The IN position is BRIDGE mode, the OUT position is STEREO mode.  
Exercise care when selecting the BRIDGE mode. Accidental selection of this mode could damage  
loudspeakers, particularly in bi-amped systems. Amplifier BRIDGE mode theory will be covered later  
in this manual.  
(11) GROUND LIFT SWITCH  
Avoid background noise and hum.  
Turn switch right or left to cut electrical noise.  
Always turn power off before using this feature.  
(12) FAN GRILL  
Two 2-speed DC fans supplies cool air to the amplifier. THIS INTAKE SHOULD NEVER BE BLOCKED!  
The fans switches to high speed automatically when the unit requires additional cooling. At idle and cool,  
the fans should be in low speed. The fans should never stop unless the amplifier is switched off or the  
AC mains power source is interrupted.  
(13) COMBO INPUT CONNECTOR  
The combo connector offers both female XLR and 1/4" phone jack balanced inputs for each channel.  
The XLR is wired with pin 1 as ground, pin 2 positive input, and pin 3 negative input. The 1/4" phone jack  
is a tip/ring/sleeve (3-conductor) type, with the tip being positive input, the ring negative input, and the  
sleeve ground. It is important to realize that the XLR 1/4" jack, and barrier strip inputs are all in parallel,  
therefore a balanced input to the associated channel can be accomplished using a male XLR, a  
3-conductor phone jack, or bare wires connected to the barrier strip.  
As an alternative, the 1/4" input can also be used with a regular tip/sleeve (2-conductor) type plug  
commonly found on single-conductor shielded patch cord. In this case, the input becomes unbalanced  
with the tip as positive input, and the sleeve ground (the ring being grounded by the sleeve of the plug).  
An additional unique feature of this 1/4" input jack is something called a "quasi-balanced" input. The  
sleeve of this jack is connected to chassis ground through a relatively low-value resistance that is part of  
a ground loop elimination circuit. This circuitry will provide hum-free operation when relatively short 1/4"  
cable patches are made to this input from various outputs on this amplifier, or from other equipment that  
shares the same rack with this amplifier. The quasi-balanced circuitry is "automatic" and virtually  
"invisible" in normal usage. This feature can be defeated with a jumper on the barrier strip from the  
input terminal of that channel to the ground terminal.  
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(14) LOW CUT SWITCH  
This switch is used to activate the LOW CUT filter for the corresponding channel. It is again a push-push  
type switch, requiring a small "tool" to activate. The IN position routes the input signals through the 40  
Hz LOW CUT filter, while the OUT position bypasses the filter. This filter will cut extremely low  
frequencies, protecting speakers from the possibility of over-excursion. The filter low-frequency roll off is  
12 dB per octave. The LOW CUT filter for each channel will function independently of the crossover  
function to be discussed next.  
(15) CROSSOVER SWITCH (150 Hz X OVER)  
This switch is used to activate the 150 Hz crossover for the corresponding channel. It is also a  
push-push type switch and requires a small "tool" to activate. The offers two 150 Hz crossovers. These  
are specially designed features that enhance the response of most loudspeakers in a typical bi-amped  
application. Rather than just having a fiat output curve, these crossovers use special filters to tailor the  
response and provide a flat acoustical output. This type of crossover "sounds" more natural than  
conventional "state-variable" type crossovers.  
With the switch IN, the input signals are routed through the crossover, and the low frequencies are  
automatically sent to the corresponding channel. At the same time, the high frequencies are sent to  
the HIGH OUT (17) jack and must then be patched to INPUT of the other channel of this amplifier or to  
another amplifier input to complete the bi-amped system. Additionally, the low frequencies are sent to  
the THRU/LOW OUT (16) jack, and can be patched to other amplifier inputs to permit even larger  
systems. With the switch OUT the crossover is defeated, and input signal is routed directly to the  
respective power amp channel. The crossover frequency is fixed at 150 Hz and cannot be changed. The  
crossover configuration is a 4-pole Linkwitz-Riley approximation.  
(16) THRU/LOW OUT JACKS  
As per previous crossover discussion, this 1/4" jack supplies low-frequency out signals from the  
activated crossover for patching to additional power amplifier inputs, providing added flexibility in larger  
bi-amped systems. When the crossover function is not activated, this jack converts to a THRU function,  
where the output of the electronically balanced input circuitry is supplied to this jack. The THRU function  
provides the means to patch a full range input signal to the other input of this amplifier (parallel  
mode), or to other amp inputs in the same rack. This function allows one balanced mixer feed to be  
connected to the amp via the desired balanced input connector (XLR, 1/4", Barrier), and then further  
distributed locally. Regardless of the crossover switch position, this 1/4" jack provides an unbalanced  
(tips/sleeve) output to be patched with single conductor shielded cables.  
(17) HIGH OUT JACKS  
Again, as per previous crossover discussion, this 1/4" jack supplies high frequency out signals from the  
activated crossover for patching to this amplifier and/or additional power amplifier inputs. Unlike the  
low-frequency crossover output, that is automatically routed to the associated channel, the high-frequency  
output signal must be patched to some suitable input in order to complete the bi-amped system. This  
1/4" jack also provides an unbalanced (tip/sleeve) output to be patched with signle-conductor shielded  
cables.  
INDUSTRIAL AND COMMERCIAL INSTALLATIONS  
For commercial and other installation where sustained high-power operation is required, the amplifiers  
should be mounted in a standard 19" rack. It is not necessary to leave a rack space between each  
amplifier in the stack since each fan pulls air in from the rear and exhausts the hot air our the front.  
However, an adequate cool air supply must be provided for the amplifier when rack mounted. The  
internal fan must have a source of air that is not preheated by other equipment. The amplifier will start up  
in low speed fan operation and will normally stay at low speed unless sustained high-power operation  
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levels occur Then, as temperatures in the amplifier heat sinks increase, the automatic thermal-sensing  
circuitry will cause high-speed operation to occur. Depending upon signal conditions and amp loading,  
high-speed fan operation may continue or the fan may cycle continuously between high and low. This  
situation is quite normal. If cooling is inadequate, however, the amplifier thermal-sensing system may  
cause temporary shut down of the unit, indicated by the LEDs on both channels going dark. Inadequate  
cooling may be due to preheated air, reduces air flow resulting from blockage of inlet/outlet ports, severe  
amplifier overload, or short circuit conditions. Depending upon the available cooling air, operation should  
be restored relatively quickly, and the power LED on both channels will again be illuminated. In any  
event, action should be taken to correct the cause of the thermal shutdown. If the amplifier is not severely  
overloaded or shorted and air flow is normal in and out of the amplifier, then steps should be taken to  
provide a cooler environment for all the amplifiers. As a general rule, the cooler electronic equipment  
is operated, the longer its useful service life.  
In most low to medium-power applications, the amplifier can be mounted in any configuration. It is  
desirable that, if at all possible, the power amplifier be located at the top of an equipment stack. This will  
prevent possible overheating of sensitive equipment by the hot air rising from the power amplifier. As a  
general rule, most home and studio requirements will never cause high-speed fan operation. High-speed  
operation may indicate that you have not taken the necessary steps to provide adequate cooling. Fully  
closed up in a cabinet, a power amplifier will have severe cooling problems, even at low power levels.  
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AMPLIFIER CONFIGURATIONS  
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SPECIFICATIONS  
RATED OUTPUT POWER:  
Stereo mode  
(EIA both channels driven)  
4 Ohms EIA, 1 kHz, 1% THD  
8 Ohms EIA, 1 kHz, 1% THD  
Bridge mode, mono  
300W RMS/chan 400W RMS/chan 500W RMS/chan 600W RMS/chan 700W RMS/chan 800W RMS/chan 900W RMS/chan 1000W RMS/chan  
150W RMS/chan 200W RMS/chan 250W RMS/chan 300W RMS/chan 350W RMS/chan 400W RMS/chan 450W RMS/chan 550W RMS/chan  
8 Ohms EIA, 1 kHz, 1% THD  
600W RMS  
800W RMS  
1000W RMS  
1200W RMS  
1400W RMS  
1600W RMS  
1800W RMS  
2000W RMS  
HUM & NOISE:  
Stereo mode, below rated  
output power, 4 ohms  
100dB, unweighted 100dB, unweighted 100dB, unweighted 100dB, unweighted 100dB, unweighted 100dB, unweighted 100dB, unweighted 100dB, unweighted  
less than 0.01% less than 0.01% less than 0.01% less than 0.01% less than 0.01% less than 0.01% less than 0.01% less than 0.01%  
DISTORTION:  
SMPTE-IM  
INPUT SENSITIVITY & IMPEDANCE:  
@ rated output power, 4 ohms  
Balanced, TRS 1/4" phone jack  
Balanced, XLR (pin 2 positive)  
Overall system gain per channel  
0.87V RMS (-1.2dBV) 1V RMS (0dBV)  
1.12V RMS (+1dBV) 1.23V RMS (+1.79dBV) 1.32V RMS (+2.4dBV) 1.4V RMS (+2.9dBV) 1.5V RMS (+3.5dBV) 1.58V RMS (+3.97dBV)  
10K Ohms per leg 10K Ohms per leg 10K Ohms per leg 10K Ohms per leg 10K Ohms per leg 10K Ohms per leg 10K Ohms per leg 10K Ohms per leg  
10K Ohms per leg 10K Ohms per leg 10K Ohms per leg 10K Ohms per leg 10K Ohms per leg 10K Ohms per leg 10K Ohms per leg 10K Ohms per leg  
40X(+32dB)  
40X(+32dB)  
40X(+32dB)  
40X(+32dB)  
40X(+32dB)  
40X(+32dB)  
40X(+32dB)  
40X(+32dB)  
DISTORTION: (THD, typical value)  
Stereo mode, both channels driven, 4 Ohms  
20 Hz to 20 kHz, 10dB below rated power  
20 Hz to 2 kHz, at full rated power  
less than 0.03%  
less than 0.03%  
less than 0.03%  
less than 0.03%  
less than 0.03% less than 0.03% less than 0.03%  
less than 0.03% less than 0.03% less than 0.03%  
less than 0.03% less than 0.03%  
less than 0.03% less than 0.03%  
less than 0.03%  
less than 0.03%  
FREQUENCY RESPONSE:  
Stereo mode, both channels driven  
+0, -1 dB @1 W RMS, 4 ohms  
+0, -3 dB @rated output, 4 ohms  
20Hz to 20 kHz  
5Hz to 50 kHz  
20Hz to 20 kHz  
5Hz to 50 kHz  
20Hz to 20 kHz  
5Hz to 50 kHz  
20Hz to 20 kHz  
5Hz to 50 kHz  
20Hz to 20 kHz  
5Hz to 50 kHz  
20Hz to 20 kHz  
5Hz to 50 kHz  
20Hz to 20 kHz  
5Hz to 50 kHz  
20Hz to 20 kHz  
5Hz to 50 kHz  
DAMPING FACTOR: (Typical value)  
Stereo mode, both channels driven  
8 Ohms, 1 kHz  
Greater than 300 Greater than 300  
Greater than 300 Greater than 300 Greater than 300 Greater than 300  
Greater than 300  
Greater than 300  
FEATURE SET: ALL Models (++indicates each channel)  
COOLING SYSTEM: Two-speed DC fan, air flow back to front  
LOW CUT FILTER ++: -3dB @ 40 Hz, 12dB per octave  
CROSSOVER ++: 150Hz, 4-pole Linkwitz-Riley approximation  
INPUT++: Electronic balanced; Barrier Strip, XLR, TRS 1/4" (6.3mm)  
CROSSOVER OUTPUTS ++: Low/Thru and High, TS 1/4" (6.3mm)  
AMPLIFIER OUTPUTS: Speakons for Chan A, Chan B and Bridge; Binding, Posts  
LED INDICATORS ++: Red, DDT/clipping; Green signal; Blue, power  
AMP PROTECTION: Full short circuit, open circuit; over-temp thermal; RF; stable into any load  
LOAD PROTECTION: Turn on/off muting, DC (triac crowbar), low-cut filter  
MAINS VOLTAGES AVAILABLE 100, 120, 230, 240 VAC, 50-60 Hz  
DIMENSIONS: Height: 3.5" (8.9cm), Width: 19" (48.3cm), Depth: 17.3" (44.1cm)  
Specifications subject to change without notice  
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PyleAudio.com  
718.535.1800 718.236.2400 (fax)  
1600 63rd Street, Brooklyn NY 11204  
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