When using the PS 1230 power supply with either amplifier, connect one end of the DC power cord to one of the two pole, 3.5 mm captive screw connectors on the power supply. Connect the other end into the power socket on the rear panel of the amplifier, as shown in figure 4 below. The power cord connectors are already correctly wired when shipped.

CAUTION: When the PS 1230 power supply is connected to the MPA 401, it

 

must not be shared with any other devices.

MPA 401 series

PS 1230 Power Supply

 

Amplifier

 

AC Power Cord

POWER

Power Receptacle

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

12V

1.5 A MAX

DC Power Cord

Captive Screw Connector

Tie

Wrap

DC Power Outputs

Captive Screw

Connector

Power Supply

Output Cord

Figure 4. Connecting the PS 1230 Power Supply to an MPA 401 Amplifier

Audio Inputs

Use the rear panel connections (see figure at right) to connect audio inputs to the amplifier. Wire the connectors as shown below. The balloon numbers refer to figure 2.

INPUTS

(MONO)

L

R

b

c d

L (MONO) R

BRCA input connectors — These connectors accept unbalanced, line level audio signals. The input can be stereo (using two RCA jacks) or mono (using a single RCA jack plugged into the left/mono socket).

If unused, the connectors automatically terminate to lower the noise floor.

C3.5 mm stereo input — This input also accepts unbalanced, line level audio signals through a 3.5 mm tip ring sleeve (TRS) stereo jack. If unused, the connector automatically terminates to lower the noise floor.

Tip (+)

Sleeve ()

RCA Connector

Tip (L)

Ring (R)

Sleeve ()

3.5 mm TRS Connector

DBalanced or unbalanced audio input connector — This 5-pole 3.5 mm captive screw connector accepts line level, balanced or unbalanced, mono or stereo audio signals. See the notes on page 4 for important information about connecting wires to captive screw connectors.

Tip

L

Sleeve

(MONO)

Tip

R

Sleeve

 

Unbalanced Stereo Input

(high impedance)

Tip

L

Sleeve

R(MONO)

 

Unbalanced Mono Input

Tip

L

Ring

(MONO)

Sleeve (s)

 

Tip

R

Ring

 

Balanced Stereo Input

 

(high impedance)

Tip

L

Ring

R(MONO)

Sleeve

 

Balanced Mono Input

MPA 401-70V and MPA 401-100V • Rear Panel and Cabling

5

Page 11
Image 11
Extron electronic MPA 401-70V manual Audio Inputs, PS 1230 Power Supply

MPA 401-70V specifications

The Extron Electronics MPA 401-70V and MPA 401-100V are powerful, compact audio power amplifiers designed for efficient performance in a variety of professional audio applications. These amplifiers are specifically tailored for use in systems that require reliable, high-quality audio distribution in challenging environments, such as schools, corporate settings, and commercial spaces.

One of the standout features of the MPA 401 series is its versatility in supporting both 70V and 100V speaker systems. This functionality allows for easy integration into existing audio setups, accommodating different types of speakers and installation requirements. The MPA 401-70V and MPA 401-100V boast an output power rating of 40 watts per channel, providing ample power for driving multiple speakers while maintaining audio clarity and precision.

Another key technology employed in these amplifiers is their efficiency and thermal management, which are critical for long hours of operation. The MPA 401 series is designed with an advanced Class D output stage, ensuring high efficiency while minimizing heat generation. This not only leads to lower energy costs but also increases the reliability of the devices, ensuring consistent performance even in demanding conditions.

The MPA 401 amplifiers are equipped with comprehensive input options, including both balanced and unbalanced inputs to accommodate various audio sources. This flexibility makes it easy to connect microphones, mixers, and other audio sources, ensuring that users have the tools needed to create a seamless audio experience. Additionally, each amplifier includes a built-in high-pass filter, which can help optimize the sound when used with specific speaker types.

Including features such as fault protection, short circuit protection, and thermal protection, the MPA 401 amplifiers ensure both safety and longevity in operations. Their compact design makes them ideal for installation in tight spaces, while the rugged construction guarantees durability in any environment.

Furthermore, the amplifiers offer front-panel controls, providing users instant access for volume adjustments and signal monitoring. This simplicity of use enhances the overall user experience, allowing for quick adaptations and optimizations on the fly.

In summary, the Extron MPA 401-70V and MPA 401-100V are robust amplifiers designed to withstand various environmental challenges while delivering exceptional audio performance. Their combination of power, efficiency, and flexibility makes them an excellent choice for a broad range of professional audio applications.