PROFESSIONAL POWER AMPLIFIER
PTA3000
OPERATING GUIDE
SAFETY INSTRUCTIONS
Intended to alert the user to the presence of uninsulated “dangerous voltage”
within the product’s enclosure that may be sufficient magnitude to constitute
a risk of electric shock to persons.
Intended to alert the user of the presence of important operating and
maintenance (servicing) instructions in the literature accompanying the product.
CAUTION: To reduce the risk of electric shock, do not remove cover. No user serviceable
parts inside. Refer servicing to qualified service personnel.
WARNING: To prevent electrical shock or fire hazard, this apparatus should not be exposed
to rain or moisture, and objects filled with liquid, such as vases, should not be placed on this
apparatus. Before usin g this apparatus, read the operating guide for further warnings.
CAUTION: Risk of electrical shock DO NOT OPEN!
IMPORTANT SAFETY INSTRUCTIONS.
When using electrical products, caution should always be used. Please read
and keep these 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 a dry cloth.
7. Do not block any of the ventilation openings. Install in accordance with manufacture’s
instructions.
8. Do not install near any heat sources such as a radiator, heat register, stove or other
apparatus (including amplifiers) that produce heat.
9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has
two blades with one wider than the other. A grounding type plug has two blades with a third
grounding plug. The wide blade or thirds prong is 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 the point they exit from the apparatus.
11. Only use attachments/accessories provided by the manufacture.
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
6
4
3
2
1 1/2
1
1/2
1/4 or less
90
92
95
97
100
102
105
110
115
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.
2
2
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.
UNP ACKING
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-rackspace 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.