6.As a rule of thumb, use 18 gauge speaker wire for speaker runs up to 30' (9m), 16 gauge up to 70' (21m), and 14 gauge up to 150' (39m). The 4-terminal connectors accept wire sizes up to 12 gauge max.

7.Strip the insulation back about 1/4" (6mm) and twist the strands on each lead to prevent fraying.

CAUTION: After lead ends are inserted and the screws tightened down, be sure there are no free strands that could cause shorting!

Speaker Phasing

To obtain stable imaging and full bass response, it is imperative that stereo speakers be connected "in phase" with each other. You can verify this as follows:

a)If the "+" (positive) and "–" (negative) terminals on your speakers are correctly marked, and visible, and you have wired the system as shown in Figs. 6 and 7, then the system will be "in phase". No further action is required.

Most manufacturers identify the positive terminal with a red binding post, a "+" sign, or a red dot.

b) If you are unsure of the markings, you can verify the

phasing. Using a mono sound source, such as AM

radio, alternately reverse the leads to one of the

speakers. Pick the connection that delivers a solid

center image between the speakers as well as best

 

Preamp Outputs

VIDEO

ZPR68, etc.

bass response.

Bridged Mode Connections

In general, it is recommended that the BRIDGED mode not be used in multi-room applications where several speakers are driven through room volume controls and the like.

For such applications, use the STEREO mode.

Use the BRIDGED mode for single speaker, higher power applications, such as in surround sound systems. Use speakers with an impedance rating of 8-Ohms minimum.

To make connections for the BRIDGED mode, follow the steps given before for stereo connections, but with the following differences:

1. You may connect the RCA-type patch cables from the

OUTPUT jacks of the driving preamp or other source

to either the LEFT or the RIGHT input jacks of the

bridged pair, as shown in Fig. 7.

Do this for just the amplifier pairs you wish to run in the

bridged mode.

CAUTION: Be sure Power is OFF when connecting

L

AUDIO

R

PA1235

Rear Panel

COMMON BUS

LEFT

LOCAL

RIGHT

 

 

1

 

 

STEREO

MODE

 

MONO

 

BRIDGED

CI

GROUND

STATUS

IR IN

+

BRIDGED --

SPEAKER

LEFT RIGHT

+ -- -- +

 

RCA Type

 

Patch Cords

 

Set MODE

1

Switches to

BRIDGED position

COMMON BUS

LEFT

LOCAL

RIGHT

 

 

2

 

WARNING

STEREO

MODE

 

MONO

TURN POWER

BRIDGED

OFF BEFORE

 

 

 

CHANGING

GROUND

STATUS

INIR

CI

MODES

 

 

 

+

BRIDGED --

SPEAKER

LEFT RIGHT

+ -- -- +

Amplifiers &

or switching the amp for BRIDGED operation.

2. Slide the MODE switch to the BRIDGED position.

NOTE: Do this only on the amplifier pairs you wish to

run in the bridged mode!

3. Connect one speaker wire pair between the 4-terminal

"SPEAKER" connectors on the PA1235 and the speak-

ers as shown in Fig. 7. Be sure to use only the two

outer terminals marked "+" and "–" on the 4-terminal

connector as shown on the panel for BRIDGED con-

nections.

Be sure speakers are connected with correct polarity as shown.

+

–

+

–

Speaker Systems

Left

Right

Fig. 7 BRIDGED Mode Connections

Preamplifiers

 

 

 

®

 

 

 

 

PA1235

 

 

9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Image 9
Xantech PA1235 installation instructions Speaker Phasing, Bridged Mode Connections
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PA1235 specifications

The Xantech PA1235 is a cutting-edge multi-zone power amplifier designed for both residential and commercial audio applications. Renowned for its impressive performance and reliability, the PA1235 offers robust amplification for distributed audio systems, fulfilling various audio needs in different environments.

One of the main features of the PA1235 is its power handling capabilities. It delivers 35 watts per channel across six channels, ensuring that every zone in a multi-room setup receives adequate power for optimal sound quality. This makes it suitable for powering a variety of speaker types, from in-ceiling speakers to outdoor sound systems. Its architecture allows flexibility in system configuration, making it easy to distribute audio throughout a home or business.

The PA1235 employs advanced Class D amplification technology, which maximizes efficiency while reducing power consumption and heat generation. This not only makes the amplifier more environmentally friendly but also enhances longevity and reliability. The lightweight design of Class D amplifiers allows for easier installation, especially in complex multi-zone environments.

Another characteristic of the PA1235 is its multi-zone functionality. Users can easily assign audio sources to different zones, allowing for personalized control of audio in various spaces. This feature is particularly valuable in commercial settings, where different areas may require distinct audio content or volume levels. It offers seamless integration with existing automation systems, thanks to its compatibility with various control protocols, facilitating a user-friendly experience.

The amplifier also features adjustable gain controls for each channel, allowing users to fine-tune the audio output for different speaker types or acoustic environments. Additionally, the built-in protection circuitry ensures that both the amplifier and attached speakers are safeguarded from overload or short-circuit situations, thereby enhancing overall system durability.

With its combination of power, efficiency, and versatility, the Xantech PA1235 is an ideal choice for integrators and audiophiles alike. Whether used in home theaters, restaurant sound systems, or corporate audio solutions, it provides high-quality audio performance that meets the demands of modern audio requirements, making it a prominent player in the audio amplification market.
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