StudioMaster EX4-1800 4-Channel Power Amplifier

KEY FEATURES OF THE STUDIOMASTER EX4-1800 POWER AMPLIFIER

1. Overview of the StudioMaster EX4-1800

The StudioMaster EX4-1800 is a 4-channel power amplifier designed for professional audio systems that require multi-channel amplification in a single unit. Its four-channel configuration allows users to power multiple speaker groups in applications such as auditoriums, live performance stages, commercial karaoke venues and installed sound systems.

The amplifier features a specified frequency response of 20Hz–20kHz, supporting audio reproduction across a wide frequency range for speech, background music and live performances.

2. Four-Channel Power Amplifier Design

The StudioMaster EX4-1800 is presented as a four-channel amplifier, allowing users to build sound systems with multiple speaker groups without necessarily requiring separate amplifiers for every channel.

This multi-channel configuration is particularly useful for systems that need to distribute amplification between main speakers, stage monitors or different audio zones.

3. Amplifier Power for Professional Audio Systems

According to the detailed EX4-1800 description on the product page, the amplifier is specified with the following power ratings:

• 4 × 450W at 8Ω Stereo.
• 4 × 675W at 4Ω Stereo.
• 2 × 1350W at 8Ω Bridge.

These power ratings provide different configuration options depending on speaker impedance and operating mode. Users should select the appropriate configuration and speaker load according to the manufacturer's technical instructions.

4. Wide Frequency Response from 20Hz to 20kHz

The EX4-1800 has a specified frequency response of 20Hz–20kHz, covering the commonly used audible frequency range.

This makes the amplifier suitable for various audio content, including vocals, speech, background music and live performances. Actual sound quality also depends on the speakers, signal processing equipment and overall system configuration.

5. Stereo and Bridge Operating Modes

According to the detailed product specifications, the EX4-1800 supports Stereo and Bridge configurations.

• Stereo: operates the amplifier channels independently to power their respective speaker groups.
• Bridge: combines two amplifier channels in bridge mode to provide a suitable power configuration for compatible speaker loads.

The operating mode must be selected according to the manufacturer's instructions, with speaker impedance and wiring checked before powering on the system.

6. 0.775Vrms Input Sensitivity

The StudioMaster EX4-1800 has a specified input sensitivity of 0.775Vrms. This is an important parameter when matching the amplifier with mixers and signal processors in a professional audio system.

Setting an appropriate output level from the preceding equipment helps the system make effective use of the amplifier while avoiding input signals that are excessively low or high.

7. Selectable 26dB Amplifier Gain

The product page specifies a selectable amplifier gain of 26dB, measured under rated output power conditions at 1kHz.

This specification helps users calculate and match the amplifier with other system components, particularly when synchronizing signal levels between mixers, processors and power amplifiers.

8. Crosstalk Suppression

The EX4-1800 is specified with crosstalk suppression of 75dB or greater under the published measurement conditions: below rated power, across 20Hz–1kHz and with an 8Ω load.

Crosstalk suppression helps maintain signal separation between amplifier channels, supporting the operation of multi-channel audio systems.

9. 100–240VAC Power Supply

The detailed EX4-1800 description specifies an operating voltage of 100–240VAC (±10%), at 50/60Hz.

This voltage range allows the amplifier to operate with different power supply conditions. Proper installation still requires a suitable power source and compliance with electrical safety requirements.

10. Suitable for Installed Audio Systems

A multi-channel amplifier such as the EX4-1800 can be integrated into fixed sound installations or professional equipment racks. Its four-channel configuration makes it convenient to distribute amplification across multiple speaker groups.

For practical installation, users should calculate amplifier power, speaker impedance, speaker cable requirements and the specifications of each speaker group to ensure correct system operation.

11. Flexible Integration with Audio Equipment

With an input sensitivity of 0.775Vrms and selectable 26dB gain, the EX4-1800 can be integrated into an audio signal chain comprising mixers, signal processors and compatible loudspeakers.

Correct system matching helps optimize signal levels, reduce overload-related distortion and make effective use of the amplifier's output capability.

12. Dimensions and Weight Listed in the Product Description

The detailed EX4-1800 description lists a weight of 5.2kg and dimensions of 483 × 45 × 299mm (W × H × D).

These figures should be verified against the official manufacturer's technical documentation before being used for rack installation drawings, equipment rack design or shipping information, as the main specification section displays different figures.

13. Applications of the StudioMaster EX4-1800

With its four-channel amplification configuration and published power modes, the StudioMaster EX4-1800 may be considered for applications such as:

• Auditorium sound systems.
• Live performance stages.
• Commercial karaoke sound systems.
• Restaurant and entertainment venue audio.
• Stage monitor systems.
• Audio installations requiring multiple amplifier channels.

The final amplifier selection should be based on actual power requirements, speaker impedance and the operating needs of the complete system.

14. Why Consider the StudioMaster EX4-1800?

The StudioMaster EX4-1800 is presented as a four-channel power amplifier for audio systems that require amplification across multiple speaker groups. Its listed specifications, including 4 × 450W at 8Ω Stereo, 4 × 675W at 4Ω Stereo, 2 × 1350W at 8Ω Bridge, a 20Hz–20kHz frequency response and 0.775Vrms input sensitivity, provide useful reference points for system planning.

Before purchasing or installing the amplifier, users should check the official manufacturer's datasheet to confirm the exact model identity, power ratings, dimensions and weight.