StudioMaster QX4-4000 4-Channel Power Amplifier

KEY FEATURES OF THE STUDIOMASTER QX4-4000 POWER AMPLIFIER

1. Introduction to the StudioMaster QX4-4000 Power Amplifier

The StudioMaster QX4-4000 is a four-channel power amplifier from the StudioMaster QX Series, designed for professional sound systems that require high output power and flexible speaker configurations. With a rated output of 4 × 1700W at 4Ω Stereo, it can be considered for full-range loudspeakers, subwoofers and professional line array systems.

The product is described as featuring Class D amplification, a compact 1U rack design and Stereo, Parallel and Bridge operating modes. It is suitable for consideration in live stages, auditoriums, event sound systems and professional fixed installations.

2. Professional Four-Channel Design in a Compact Rack Format

The StudioMaster QX4-4000 features a four-channel amplifier architecture, allowing multiple speaker groups to be powered by a single unit. Its 1U rack design helps save equipment space and makes installation alongside mixers, processors and other audio equipment more convenient.

With a published weight of approximately 9kg, the QX4-4000 is designed to be relatively easy to transport, install and deploy in mobile sound systems.

3. Powerful Four-Channel Amplification

The StudioMaster QX4-4000 provides the following published Stereo output ratings at different speaker impedances:

• 4 × 1000W at 8Ω Stereo.
• 4 × 1700W at 4Ω Stereo.
• 4 × 2890W at 2Ω Stereo.

Its four-channel configuration allows technicians to distribute amplification across multiple speaker groups. The published 2Ω operating rating provides additional system design flexibility, provided that the loudspeakers and wiring meet the amplifier's impedance requirements.

4. High-Power Bridge Operation

In addition to Stereo mode, the QX4-4000 supports Bridge operation, combining pairs of amplifier channels to provide higher-power outputs. The published Bridge ratings are:

• 2 × 2000W at 16Ω.
• 2 × 3400W at 8Ω.
• 2 × 5780W at 4Ω.

Bridge mode can be useful for speaker configurations that require greater power from each amplifier output. Always follow the manufacturer's wiring instructions and minimum impedance requirements.

5. 70V Hi-Z Support

The product specifications list a 70V Hi-Z output rating of 4 × 1700W. This may be relevant when considering the QX4-4000 for high-voltage distributed speaker systems.

Before installation, check compatibility between the amplifier, speaker transformers and line configuration. The product page currently lists a 70V Hi-Z rating but does not specify a 100V output rating.

6. Wide Frequency Response

The StudioMaster QX4-4000 has a published frequency response of 20Hz to 20kHz. This range covers the common operating bandwidth of full-range sound systems and allows the amplifier to be paired with a variety of loudspeaker types.

When combined with suitable signal processing and loudspeakers, the amplifier can serve in live stages, auditoriums and fixed sound installations.

7. High Signal-to-Noise Ratio

The product specification section lists a signal-to-noise ratio greater than 109dB. This measurement describes the relationship between the audio signal and the amplifier's background noise.

In a properly designed and calibrated sound system, a good signal-to-noise ratio helps support clear audio reproduction and reduce the effect of background noise.

8. Selectable Input Sensitivity and Gain

The QX4-4000 offers selectable input sensitivity/gain options of 41dB, 38dB, 35dB and 32dB. These settings give technicians flexibility when matching the amplifier with mixers, processors and other signal sources.

The appropriate gain setting should be selected according to the source output level and loudspeaker configuration to help prevent signal overload during operation.

9. Stereo, Parallel and Bridge Operating Modes

The StudioMaster QX4-4000 supports three common operating modes:

• Stereo: amplifier channels operate independently, suitable for multi-channel sound systems.
• Parallel: the input signal is distributed in parallel to the amplifier channels according to the selected configuration.
• Bridge: pairs of amplifier channels are combined to provide higher-power outputs.

These modes allow the QX4-4000 to adapt to different loudspeaker layouts and professional sound system designs.

10. Class D Amplification and Switching Power Supply

According to the product description, the StudioMaster QX4-4000 uses Class D amplifier technology with a stated operating efficiency of over 95%. This design aims to deliver high output power in a compact 1U rack enclosure.

The product page also mentions a soft-switching power supply and Power Factor Correction (PFC) technology. These are manufacturer or seller description details and should be checked against official technical documentation when confirming the hardware configuration.

11. Balanced XLR Input Connectivity

The product description states that the QX4-4000 features balanced XLR inputs for connection to mixers, signal processors and other professional audio equipment.

Balanced connections help reduce interference along the signal path, which is particularly useful in installations with long cable runs or multiple electronic devices.

12. Limiter and Protection Features

According to the product description, the StudioMaster QX4-4000 includes an output limiter to help control signal levels and protect connected loudspeakers when the system operates at high output levels.

The product is also described as having variable-speed cooling fans and protection mechanisms against overheating, overload, low voltage and DC output. These features are intended to support stable operation during extended use.

13. Applications of the StudioMaster QX4-4000

With its four-channel architecture, high output ratings and flexible operating modes, the StudioMaster QX4-4000 can be considered for a variety of professional sound applications:

• Live stage sound systems.
• Event and touring sound reinforcement.
• High-power full-range loudspeakers.
• Subwoofer systems.
• Line array systems.
• Auditoriums and conference venues.
• Professional bars, clubs and entertainment spaces.
• Fixed sound installations.

The final configuration should be selected according to loudspeaker power handling, impedance, channel requirements and the intended wiring arrangement.

14. Why Choose the StudioMaster QX4-4000 Power Amplifier?

The StudioMaster QX4-4000 is worth considering for professional sound systems that require a high-power four-channel amplifier with a compact design and flexible operating configurations. Its published highlights include:

• Professional four-channel amplifier architecture.
• 4 × 1700W output at 4Ω Stereo.
• Published support for 2Ω operation.
• Bridge output up to 2 × 5780W at 4Ω.
• 70V Hi-Z output rating of 4 × 1700W.
• Stereo, Parallel and Bridge operating modes.
• Selectable input sensitivity/gain options.
• Compact 1U rack design and approximately 9kg published weight.

These features make the QX4-4000 a potential option for stage sound, auditoriums, line array systems and professional live sound applications. For reliable operation, match the amplifier with compatible loudspeakers and signal processing equipment.