Earthquake Sound PA-600 operation manual Signal Indicator Leds

PA-600 AMPLIFIER FRONT & REAR PANELS FUNCTIONS/CONNECTION.

6. SIGNAL INDICATOR LEDS:

These LED's illuminate when signal is detected at the amplifier's output terminals, providing accurate visual confirmation of signal presence, which is helpful in hookup, and troubleshooting. The output signal must be at least 5% of the amplifier's full rated output to make the LED's illuminate.

7. COOLING FAN EXHAUST VENT:

The PA 600 employs a pair of variable-speed internal cooling fans to draw air through the unit and keep it running cool even under extreme operating conditions. The air is drawn in through the unit's side and rear intake vents and is forced out through the front panel exhaust vent. This method of cooling draws air out from the interior of the rack and provides more efficient cooling methods, which bring air in from the front and exhaust it through the back. Keep these vents clear and free from obstruction at all times to insure proper cooling.

These jacks accept line level signal sources by means of cables fitted with standard ¼” phone plugs. Low or medium impedance balanced or unbalanced sources are acceptable for these inputs. Balanced inputs are wired as follows: Tip = Signal (+), Ring = Signal (-), Sleeve

=Ground. Unbalanced inputs may be wired: Tip = Signal, Sleeve = Ground, using a “mono” plug.

NOTE: The input channel circuitry requires a line level signal of 1.1V RMS or greater to drive the amplifier to full output.

13. BINDING POST OUTPUT:

These output connectors offer an excellent method of connecting the amplifier to your speakers using cables terminated with spade lugs, banana plugs, or bare wire. When using the amplifier in the Mono Mode, you must use either the two red binding posts or the BIAMP/MONO (middle) Phone jack (#13). The Binding Posts are wired in parallel with the Phone Jacks.

8. STEREO / MONO SWITCH:

This switch connects the channels to work together for more power output. In the “STEREO” position the amplifier is in the STEREO MODE; with the switch in “MONO” MODE the amplifier is in the Bridge MONO MODE. In the Bridge Mono Mode, connect input to Channel 1(Channel 2's inputs are disconnected.) Both amp channels are internally bridged together to create a single-channel amplifier of increased output power. Use the two red BINDING POSTS (labeled ”Mono/Biamp”) or pins 1+/2+ of the BIAMP/MONO (middle) Phone jack.

9.NEW AUTO ON / OFF:

The new auto sensing circuitry immediately senses signal as it reaches the amplifier, when the music stops it will automatically fall asleep. While in sleep mode the PA-600 consumes less energy than commonly sold Pro Amps.

10. LIMIT SWITCH:

Switch to “ON” position to activate the limit circuit to prevent the amplifier from clipping. Signal indicator LED's will all be illuminated whenever the input signal attempts to overdrive the amplifier's output section. Not only does clipping produce harsh sounding distortion, it is also capable of damaging speaker components-particularly high frequency drivers.

11. XLR BALANCED INPUT JACKS:

These jacks will accept any balanced or unbalanced low or medium impedence line level source by means of a three-pin XLR plug. The wiring for the plug is as follows: Pin#1=Ground,

Pin#2=Signal (+),

Pin#3= Signal (-).

12. ¼” PHONE JACK INPUTS:

14. SPEAKER OUT JACKS:

These heavy-duty output jacks are to be used to connect the amplifier to your speakers using cables terminated with Phone type plugs. These jacks are wired in parallel with the BINDING POSTS: channel 1 and 2 Phone Jacks are wired with pin#1(+) positive or “in phase”, and pin#1(-) ground or “out of phase" (wired 1+ 1-). The MONO /BIAMP jack has channel 1 wired to 1+ and 2+, with 1+ "in phase”.

15. VOLTAGE SELECTOR:

Selection of AC 115V/60Hz or AC 230V/50Hz voltage source. Before connecting the power plug to the wall AC outlet, make sure your local power line AC voltage matches the voltage setting of amplifier.

16.FUSE: Use only the type of fuse specified on the back of amplifier.

17.POWER CORD:

This heavy duty power cord must be connected to a grounded Ac outlet of the proper voltage for the amplifier to operate. TO REDUCE THE RISK OF ELECTREC SHOCK, DO NOT REMOVE OR BYPASS THE GROUND PRONG OF THE POWER CORD.

18.RCA INPUT: this is the simplest / most common way to drive an audio signal into the PA-600 amplifier.

NEW:

Ultra sensitive input pre-amp stage circuitry. Some products on the market can produce enough voltage to drive an amp but most don't. Earthquake increased sensitivity by giving you more output with less input signal. This new circuitry will allow you to drive the amp to full stage with as little as 60milivolt.

Specifications & features are subject to change without notice. -5- www.earthquakesound.com