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The internal signal is disconnected when a plug is inserted into this jack. 33. FOOTSWITCH: Connect a dual footswitch to this jack for remote Mute and FX On/Off control. On the stereo 1/4" plug, the tip controls Mute and the ring controls FX On/Off. The Mute function is available from either the front panel or the footswitch. NOTE: A footswitch may be purchased at your local Ampeg Dealer or ordered directly from LOUD Technologies Inc. Be sure to ask for model #AFP2. PF-350 / PF-500 Bass Guitar AmplifierPF-350 / PF-500 Bass Guitar Amplifier PF-500 Block Diagram PF-350 / PF-500 Bass Guitar Amplifier PF-500 Block Diagram SPEAKER OUTPUT(SPEAKON) SPEAKER OUTPUT(1/4” TS) 16-15 dB POWERAMPLIFIER 2-STAGEFETPREAMP PEAKDETECTOR LIMITER EFFECTSSEND EFFECTSRETURN FXMIX DRYWET PRE-EQPOST-EQMASTER -40 dB GND LIFT PRE-OUT AMP-IN FOOT CONTROL XLR BALANCEDLINE OUTPUT BASS MIDRANGEMIDRANGEFREQUENCYULTRALO ULTRAHI TREBLE INPUT1M GAIN TONE CONTROLCIRCUITRYTONE CONTROL CIRCUITRY AUDIO INPUT(STEREO) PHONESOUTPUT RIGHTLEFT PEAK / MUTE LEDPEAK / MUTE LEDTUNE OUTTUNE OUT MUTEMUTE THRESH LEDTHRESH LEDCOMPRESSIONCOMPRESSIONCOMPRESSORCOMPRESSOR PF-350 / PF-500 Bass Guitar Amplifier PF-500 TECHNICAL SPECIFICATIONS Output Power Rating 300 watts rms @ 8 ohms, 3% THD 500 watts rms @ 4 ohms, 3% THD Signal to Noise Ratio 72 dB (20 Hz–20 kHz, unweighted) Maximum Gain 69 dB, tone controls centered Tone Controls Bass: +12/–12 dB @ 40 Hz Midrange: +10/–20 dB @ 220 Hz, 450 Hz, 800 Hz, 1.6 kHz or 3 kHz Treble: +15/–20 dB @ 4 kHz Power Requirements ~100–120 VAC, 50–60 Hz, 125W ~200–240 VAC, 50–60 Hz, 125W Size (H x W x D) 3.1 in/80 mm x 14.0 in/355 mm x 10.8 in/272 mm Weight 11.0 lb/5.0 kg (approximately) The PF-500 is covered with sheet metal, so be sure to clean with a dry lint-free cloth. Never spray cleaning agents on the PF-500. Avoid abrasive cleansers which would damage the finish. Ampeg continually develops new products and improves upon existing ones. For this reason, the specifications and information in this manual are subject to change without notice. “Ampeg” is a registered trademark of LOUD Technologies Inc. All other brand names mentioned are trademarks or registered trademarks of their respective holders and are hereby acknowledged. Service Information If you are having a problem with your PF-500, you can go to our website (and click on Support for service information, or call Technical Support at 1-800-898-3211 Monday-Friday during normal business hours, PST, to receive assistance. If you are outside of the U.S., contact your local distributor for technical support and service. PF-350 / PF-500 Bass Guitar Amplifier Fault/Thermal Considerations: As an amplifier works, it produces heat. The higher the signal level, the louder and hotter it gets. It is important to dissipate the heat as quickly as possible. This results in increased reliability and longevity for the amplifier. The amplifier module is mounted on a large heatsink, which is cooled by convection where cool air is drawn through its fins, carrying the heat away. In order for this convection cooling to work efficiently, it is important to provide adequate airspace behind and to the side or above the amplifier. When positioning the Portaflex, we recommend leaving at least six inches of air space behind it. In the unlikely event of the amplifier overheating, a built-in fault switch will activate, muting the signal and lighting the thermal LED. When the amplifier has cooled down to a safe operating temperature, the fault switch resets itself, and the Portaflex resumes normal operation. If the fault switch activates frequently, try turning down the volume control a notch or two to avoid overheating the amplifier. Be aware that direct sunlight and/or hot stage lights may be the culprit of an amplifier overheating. Flip-Top Instructions: So you’ve made it this far and you are now ready to flip your lid...or at least the amp. We will instruct you on how to do the latter, as we are not in the business of lid-flipping! It is accomplished in five simple steps: Step 1: loosen the latches on each side of the cabinet. There are two latches on each side, four total. Step 2: using the handle, lift the top of the cabinet (amplifier is attached underneath) and rotate it 180. clockwise (as indicated in the middle drawing below). Step 3: set the cabinet top handle-side down on the top of the cabinet. The amplifier should now be on the top, right- side up, with the front of the amp and the front of the cabinet facing the same direction. Step 4: line up and lock all four latches. Step 5: rock out like there is no tomorrow! ©2011 LOUD Technologies Inc. 16220 Wood-Red Road NE • Woodinville, WA 98072 Part No. SW0855 Rev. E 01/11 Owner’s Manual PF-350 & PF-500 Bass Guitar Amplifiers 250W rms @8 350W rms @4 speaker outputs XLR line out fx loop return send power PF 350 XLR line out pre-EQ post-EQ 300 W @ 8. 500W @ 4. MIN LOAD send return pwr amp in pre amp out tuner out p...

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