Speaker Phasing

Page 10

Model PA4100X

3.The PA4100X is 4-Ohm safe in Stereo Mode. Make sure the impedance presented to the speaker terminals by the speakers (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 PA4100X to the corresponding "+" and "–" terminals on each speaker. This will ensure correct "phasing" - see Fig. 5 and Speaker Phasing below. Since the connectors are removable, you may unplug them for ease of lead assembly.

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!

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. 5, 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 bass response.

Connecting the REMOTE MASTER ON/OFF MUTE CONTROL

As mentioned under "PA4100X PANEL AND FEATURE DESCRIPTIONS", the REMOTE MASTER ON/OFF CONTROL inputs (CI1 & CI2) will allow the power to the PA4100X to be turned ON, OFF, and MUTED by remotely applied DC Voltages. Fig. 7 illustrates how a PA4100X can be switched ON and OFF via the MRC88 Zone 7 & 8 Control Outputs (CO1 and CO2) or other control source.

NOTE: To enable this feature, be sure the CI Switch (Item #14) is in the ON (UP) position.

On/Off Standby Control:

Whenever a 5 to 30v dc voltage is applied to the TIP of the 3.5mm Stereo jack, the associated Amplifier channel will be activated (Powered ON). When the signal applied to the TIP approaches GND, it will put the associated Amplifier channel in STANDBY Mode. If both Amplifier channels are in STANDBY MODE the Amplifier will enter a “low power” STANDBY mode (Illuminated LOGO will remain ON).

Mute Control:

Whenever a 5 to 30v dc voltage is applied to the RING of the 3.5mm Stereo jack, the associated Amplifier channels signal output will be MUTED. When the signal applied to the RING approaches GND it will UN-MUTE the associated Amplifier channel and the audio signal will be returned to its previous level.

Ring:12v DC = AMP MUTED

Tip:12vDC = AMP ON

Sleeve=GND

Insulators

3.5mm Mini Plug

(3-Conductor)

Figure 6: CI Control Jack Pin Out Config

PA4100X, FOUR CHANNEL HI-POWER AMPLIFIER specifications

The Xantech PA4100X Four Channel Hi-Power Amplifier stands out as a robust solution for those seeking high-fidelity audio performance across multiple channels. This amplifier is engineered to deliver superior sound quality and reliable performance, making it an ideal choice for both residential and commercial audio applications.

One of the main features of the PA4100X is its impressive power output. With a total of 100 watts per channel at 4 ohms and 70 watts at 8 ohms, this amplifier is capable of driving a variety of speakers, ensuring that users can enjoy rich, immersive audio without distortion, even at higher volume levels. This makes it particularly suitable for environments where sound clarity and volume are paramount, such as in restaurants, retail spaces, or home theaters.

The PA4100X employs sophisticated technologies that enhance audio performance. It includes built-in protection circuitry that safeguards the amplifier from overheating and short-circuiting, ensuring longevity and reliability. The unit features a comprehensive array of inputs and outputs, allowing seamless integration with other audio components. It supports both unbalanced and balanced connections, providing versatility for different setup configurations.

Another key characteristic of the PA4100X is its compact and sturdy design. The unit is housed in a durable chassis that not only withstands the rigors of daily use but also integrates well with existing audio setups. Its straightforward controls and indicators make it user-friendly, allowing for easy adjustments and monitoring of performance.

Additionally, the amplifier offers efficient cooling solutions, including a fan that operates quietly, ensuring that the unit remains at optimal operating temperatures without adding noise to the listening experience. The PA4100X is equipped with advanced features like adjustable gain controls for each channel, facilitating precise audio balancing and customization based on the listener's preferences.

Overall, the Xantech PA4100X Four Channel Hi-Power Amplifier is a versatile and powerful audio solution designed for those who demand high-quality sound performance across multiple channels. Its combination of features, advanced technologies, and user-friendly design makes it an excellent choice for a wide range of audio applications, where clarity, power, and reliability are essential.