Summary of Contents for Preference Audio P-500Xb
- Page 1 P-500Xb 500W (Bridged) High-Current Class-D Stereo Amplifier O W N E R ’ S M A N U A L A M P L I F I E R...
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Page 2: Table Of Contents
The other half are internal to the powered subwoofer and are preset by the manufacturer. With the incorporation of these controls in the P-500Xb, the amplifier can be optimized for driving the widest possible variety of subwoofers. -
Page 3: P R E C A U T I O N S
(servicing) instructions in the enclosure that may be of sufficient magnitude literature accompanying the product. to constitute a risk of electric shock to persons. P-500Xb AMPLIFIER O W N E R ’ S M A N U A L... -
Page 4: F E A T U R E S
ƒ ƒ Summed buffered Subwoofer Inputs: Combines the left and right incoming signals so that a mono signal is delivered to the subwoofer(s). P-500Xb shown with included rack ears attached P-500Xb AMPLIFIER O W N E R ’ S M A N U A L... -
Page 5: T I P S , H I N T S , A N D S U G G E S T I O N
Power Input Receptacle and Fuse Holder – IEC 3-conductor receptacle accepts supplied IEC power cord Input Voltage Selector – Selects input voltage range for 115V or 230V P-500Xb AMPLIFIER O W N E R ’ S M A N U A L... -
Page 6: G E T T I N G S T A R T E D
AC Power Mode Selection The P-500Xb can be turned on and off in one of three different ways; Manual On, Auto Signal Sensing, or Trigger Voltage. Which mode is operative is determined by the POWER MODE switch (item 12 on Page 5). Only one method at a time can be used to activate the amplifier. - Page 7 SINGLE-CHANNEL (BRIDGE MODE) OPERATION ***HIGH POWER*** The P-500Xb amplifier can be configured to operate as a single channel amplifier. This is commonly known as “bridge Mode.” This increases the maximum output power of the amplifier significantly. bridge mode is useful for many high-power applications, such as, 2-channel stereo (using two amplifiers, one per channel) and for driving large subwoofers or multiple subwoofers.
- Page 8 C O N N E C T I O N & S E T T I N G S (continued) Input Connection The P-500Xb has two sets of inputs, “FULL RANgE” and “LINE IN SUb.” For Full-Range operation, use the “FULL RANgE” inputs located in the middle of the rear panel. This bypasses the Precision-Calibrated Control Panel.
- Page 9 Degrees. What do these scales represent? dB (decibel), as used on the P-500Xb, is a unit used to describe relative volume. The most important thing to know here is that a 1db difference in sound level is just barely noticeable and that 3db is only a modest change in perceived sound level.
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Page 10: P R E C I S I O N - C A L I B R A T E D C O N T R O L P A N E
For reference, different scales are shown below the plot. These include phase, distance, and time. GETTING TO THE BUSINESS OF SETTING THE CONTROLS If you know the manufacturer’s recommended settings for your subwoofers then you may apply these now. Otherwise, follow the instructions below for setting the P-500Xb controls. Master Volume Control •... - Page 11 Vented systems often don’t require boost, except in small amounts dictated by room acoustics or with specific designs. Check with the subwoofer’s manufacturer for system requirements. FREQ. (Hz) P-500Xb AMPLIFIER O W N E R ’ S M A N U A L...
- Page 12 More information on the operation of this control may be found in the “Degrees” section on page 10. P-500Xb AMPLIFIER O W N E R ’ S M A N U A L...
- Page 13 The diagram below shows the effect of setting the Power Range to -3db. The power levels shown at the right are approximate for stereo and mono (bridged) operation. FREQ. (Hz) P-500Xb AMPLIFIER O W N E R ’ S M A N U A L...
- Page 14 Alternatively, if the receiver or processor uses a 12db per octave roll-off, then the LFE Switch may be set to the left so that the crossover is engaged. This cascades the P-500Xb crossover with that of the receiver for a steeper 24db per octave roll-off. For this application, the crossover frequency of the P-500Xb should be set at or a little above the frequency of the receiver or processor.
- Page 15 A Short Primer on Low Frequency Acoustics The P-500Xb controls will allow you to make the best of virtually any installation. If you feel uncomfortable with setting up your P-500Xb after reading through this manual then you should consider enlisting the help of an experienced person or contacting your dealer.
- Page 16 S P E C I F I C A T I O N S Replacing the fuse The fuse can only be replaced by removing the power cord from the AC input receptacle on the back of the amplifier. This is a safety feature that reduces the risk of electrical shock. Remove the power cord from the AC input receptacle on the back of the amplifier.
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