® American Audio User Instructions GX-300 American Audio™ Professional Stereo Amplifier Power Bridge Stereo Signal Ch A Clip Min Max Signal Ch B Clip Min Max Professional Power Amplifier Power ON GX-300 Revised 5/01 American Audio® 4295 Charter Street Los Angeles Ca.
CONTENTS 7. Turn the mixer or other audio components up and adjust the amplifier levels. The green signal LED's on the face of the unit will indicate signal is being received. 6. Turn on all audio components except the amplifier. Be sure both Channel A and Channel B volume controls are turned all the way down (full counter-clockwise), and turn on main power. 5. Connect the amplifier to a power outlet with a matching power supply.
CAUTION Do not open Risk of electric shock CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE THE COVER. THERE ARE NO USER SERVICEABLE PARTS INSIDE. REFER ALL SERVICE TO YOUR AUTHORIZED AMERICAN AUDIO® DEALER. The lightning flash with an arrow triangular symbol is intended to alert the user to the presence of non insulated “dangerous voltage” within the products enclosure, and may be of sufficient magnitude to constitute a risk of electric shock.
Features 1. Bridge-Mono/Stereo mode switch. This switch allow the amplifier operating mode to toggle between stereo and bride-mono mode. 2. Built-in protection circuitry: DC output protection, Overload protection (clip limiting), and Short circuit protection. 3. Variable speed cooling fan for optimal performance and cooling. 4. 19" (48.3 cm) rackmountable case design. 5. 9" (220 cm) shallow case design, allowing this amp to be installed in a shallow rack, stacked on top of each other, or stacked on a cart.
FRONT PANEL Power 1 ON Professional Stereo Amplifier American Audio™ GX-300 1. POWER BUTTON This is used to activate the amplifier's main power. When main power is activated it will indicated the Power LED (2). 2. POWER LED This green LED will glow when the amplifier is turned on, indicating main power is traveling through the unit. Power 2 4 Bridge Stereo 3 Signal Ch A Clip 5 6 Min 7 Max 9 Signal Ch B Clip 8 Min 10 Max mode the output signal to the speakers will terminated.
REAR PANEL 11 12 13 14 15 16 11. Channel B XLR Input Connect a mixer's balanced channel "B" or channel two output signal to this balanced XLR input jack. Pin two is negative, Pin one is ground, Pin three is ground. 12. Channel A XLR Input Connect a mixer's balanced channel "A" or channel one output signal to this balanced XLR input jack. Pin two is negative, Pin one is ground, Pin three is ground. 13. Channel B 1/4" Input This jack is a balanced or unbalanced 1/4" phono plug input jack.
INPUTS BALANCED - GND = = = Pin 1 Pin 3 Pin 2 0 UNBALANCED GND + XLR Pin Configuration: US ITT Standard PIN 1: Ground / Return / 0v PIN 2: Negative data complement (-, Inverted) PIN 3: Positive data (+, Inverted) Diagram 4 The GX-300™ allows for three types of input connector per a channel, a XLR jacks for balanced connections and unbalanced 1/4” and RCA jacks. Use these connection to connect the output signal from a mixer, cross-over or EQ to your GX-300 amplifier.
OUTPUTS: Connect your speakers to the binding post outputs in the rear of the amp. The speaker wire may be connect by bare wire (directly connected usually for permanent connections), banana plug, or spade connector. Connections are made to Channel one and Channel two output for stereo mode or across the red terminals of Channels one and two for Mono Bridge Mode.
SPEAKERS 4 OHM MINIMUM TYPICAL MONO BRIDGE SET-UP Diagram 8 Typical Stereo Output Connections Diagram 7 or GX-300™ Power Amplifier Instructions page 9 SPEAKERS 4 OHM MINIMUM SPEAKERS 8 OHM MINIMUM
Typical Stereo Set-Up Diagram 9 GX-300™ (Rear View) Typical Speaker Connect to GX-300™ Channel One Output Typical DJ Mixer GX-300™ Power Amplifier Instructions page 10 Typical Speaker Connect to GX-300™ Channel Two Output
NORMAL OPERATION: Page 10/Diagram 9 show you an example of a typical stereo set-up. Connect your inputs into channels one and two of the amplifier. Connect your speakers to the outputs on the rear of the amplifier. Be sure that your front gain controls are turned down to their lowest level (full counter-clockwise). Turn your amp on. Turn your input level up. Use your front gain controls to regulate the output volume.
SPECIFICATIONS MODEL NO: Output Power: 2 ohms, 1 khz 1% THD 4 ohms, 1khz, 1%THD 8 ohms, 1khz 1% THD (Bridge Mode, mono) 4 ohms, 1khz, 1% THD 8 ohms, 1khz, 1% THD N/A N/A 150W 280W RMS RMS PER PER CH. CH. 100W 200W RMS RMS PER PER CH. CH. Less than 0.1% 1050 WATTS RMS 820 WATTS RMS 540W RMS PER CH. 400W RMS PER CH. 280W RMS PER CH. 1.0v RMS (0 dBv) Less than 0.1% 1500 WATTS RMS 1100 WATTS RMS 800W RMS PER CH. 600W RMS PER CH. 360W RMS PER CH. 5.25” (13.3cm) 19 ” (48.3cm) 15.9” (40.5cm) 61.7 lbs.
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