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TABLE OF CONTENTS
Section Title
SAFETY INSTRUCTIONS ....................................................................................................................................2
GENERAL INFORMATION...................................................................................................................................3
PA1235X PANEL AND FEATURE DESCRIPTIONS .............................................................................................4
INSTALLATION
Connecting The PA1235X........................................................................................................................8
Stereo Mode Connections........................................................................................................................8
Speaker Phasing......................................................................................................................................9
Bridged Mode Connections ......................................................................................................................9
Connecting The Remote On/Off Jack .....................................................................................................10
A Typical Multi-Zone System Diagram Using A PA1235X .......................................................................11
TROUBLE SHOOTING ......................................................................................................................................12
SPECIFICATIONS .............................................................................................................................................13
INSTALLATION INSTRUCTIONS
MODEL PA1235X
12 CHANNEL POWER AMPLIFIER
Page
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Summary of Contents for Xantech PA1235X
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Page 1: Table Of Contents
Connecting The PA1235X...8 Stereo Mode Connections...8 Speaker Phasing...9 Bridged Mode Connections ...9 Connecting The Remote On/Off Jack ...10 A Typical Multi-Zone System Diagram Using A PA1235X ...11 TROUBLE SHOOTING ...12 SPECIFICATIONS ...13 INSTALLATION INSTRUCTIONS MODEL PA1235X 12 CHANNEL POWER AMPLIFIER... -
Page 2: Safety Instructions
18. Servicing – The user should not attempt to service the appliance beyond that described in the operating instructions. All other servicing should be referred to qualified service personnel. DO NOT REMOVE COVER (OR BACK) NO USER-SERVICEABLE PARTS INSIDE © 2002 Xantech Corporation. Model PA1235X... -
Page 3: General Information
This means, for instance, that you can drive two pairs of 8-Ohm speakers in stereo mode in each zone with ease. Auto Protection Circuit. Protects the PA1235X if a short circuit or very low impedance is detected at the speaker terminals. Each amplifier pair is protected separately, with an LED indicator showing which pair is in protection. -
Page 4: Pa1235X Panel And Feature Descriptions
NOTE: The PA1235X may also be powered ON/OFF with an external AC line switch into which the power cord of the PA1235X is plugged (such as the switched AC outlet of a preamp, timer, etc. with a 15 Amp rating). For this type of operation, leave the POWER switch depressed to the MANUAL ON position. - Page 5 -- -- -- -- Figure 3 – PA1235X Rear Panel – Features and Functions 5. Line Inputs. These RCA-type jacks are the audio inputs for each of the amplifier pairs. Connect them to the OUTPUT jacks of the driving preamp with good quality RCA-type patch cables. Note that the inputs are marked LEFT-1-RIGHT, LEFT-2-RIGHT, etc., signifying the stereo channel pairs.
- Page 6 For instance, the 12 volt common CO (Control Output) of the Xantech ZPR68 preamp will power the PA1235X ON and OFF automatically with the first zone ON and last zone OFF commands. The DC Voltage must be applied continuously to retain the ON condition and drop to less than 0.5 Volt to switch to the OFF condition.
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Page 7: Installation - Physical Location And Mounting
Model PA1235X INSTALLATION - PHYSICAL LOCATION AND MOUNTING When you mount the PA1235X, you should plan its location carefully. Pay close attention to each of the following factors: 1. The amplifier is convection cooled. That is, it depends on the natural free flow of air up through the slot perforations in the bottom plate, over the internal heat dissipating fins, then out the top cover, for adequate cooling. -
Page 8: Connecting The Pa1235X
(or any combination of speakers) is 4-Ohms minimum. 5. Be sure to observe correct polarity by connecting the "+" and "–" terminal from each channel on the PA1235X to the corresponding "+" and "–" terminals on each speaker. This will ensure correct "phasing". See Figure 5 and Speaker Phasing, following. -
Page 9: Speaker Phasing
Connecting the REMOTE ON/OFF Jack As mentioned under "PA1235X PANEL AND FEATURE DESCRIPTIONS", the REMOTE ON/OFF jack allows the power to the PA1235X to be turned ON and OFF by a remotely applied DC Voltage. Fig. 7 illustrates how a © 2002 Xantech Corporation. - Page 10 Page 10 PA1235X can be switched ON and OFF via the switched AC outlet on the rear of a preamplifier. When the preamplifier Power Switch is switched ON, power is applied to the DC adapter, which in turn applies 5V to 30V DC to the PA1235X, switching it ON.
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Page 11: A Typical Multi-Zone System Diagram Using A Pa1235X
In this case, the common +12V CO (control output) from the ZPR68-10 is used to remotely turn the PA1235X On and Off. When any one of the zones is turned on, the common +12V CO goes high, turning the PA1235X On. -
Page 12: Trouble Shooting
No sound from CH2, CH4 or CH6 when stereo operation is desired. Sound cuts in and out every 3 to 5 seconds. PA1235X does not turn OFF when REMOTE input voltage goes to 0 Volts. PA1235X becomes very warm, shuts OFF, but does not come back ON automatically. -
Page 13: Specifications
240 V version: 5 A Time-Lag 250 VAC 19” W x 5.25” H x 15.5” D (483 mm W x 133 mm H x 394 mm D) 36.85 lbs (16.7 kg) © 2002 Xantech Corporation. Page 13... - Page 14 Page 14 Model PA1235X © 2002 Xantech Corporation.
- Page 15 Model PA1235X Page 15 © 2002 Xantech Corporation.
- Page 16 XANTECH CORPORATION 12950 Bradley Avenue, Sylmar CA 91342-3829 phone 818.362.0353 • fax 818.362.9506 www.xantech.com Part No. 08901240 Rev B 03-18-2002...
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