StudioMaster QX2-4000 2-Channel Power Amplifier

KEY FEATURES OF THE STUDIOMASTER QX2-4000 POWER AMPLIFIER

1. Introduction to the StudioMaster QX2-4000 Power Amplifier

The StudioMaster QX2-4000 is a two-channel power amplifier from the StudioMaster QX Series, designed for professional sound systems that require high output power and flexible operating configurations. With a rated output of 2 x 3400W at 4Ω Stereo and up to 9520W at 4Ω Bridge, according to the published specifications, it can be considered for full-range speakers, subwoofers and professional stage sound systems.

Its compact 1U rack design helps save installation space while making it suitable for stages, auditoriums, clubs and live sound applications.

2. Compact 1U Rack Design

The StudioMaster QX2-4000 features a standard 1U rack-mount design with dimensions of 483 x 44 x 370mm. Its slim profile makes it easy to install in professional equipment racks alongside mixers, signal processors and other audio equipment.

With a listed weight of approximately 9kg, the amplifier is also convenient to transport and deploy in mobile sound systems.

3. High-Power Amplification

The QX2-4000 provides several output ratings at different speaker impedances, allowing system designers to select a suitable configuration:

• 2 x 2000W at 8Ω Stereo.
• 2 x 3400W at 4Ω Stereo.
• 2 x 4760W at 2Ω Stereo.

The published 2Ω output rating offers additional flexibility for high-power speaker configurations. Always ensure that the connected speakers, cables and system wiring are compatible with the amplifier's operating requirements.

4. High-Power Bridge Mode

In addition to Stereo operation, the StudioMaster QX2-4000 supports Bridge mode, combining its two amplifier channels into a single higher-power output. The published Bridge ratings are:

• 1 x 4000W at 16Ω.
• 1 x 6800W at 8Ω.
• 1 x 9520W at 4Ω.

Bridge mode can be useful when a system requires concentrated amplifier power for a compatible speaker or speaker configuration. Check the supported minimum impedance and wiring instructions before operation.

5. 70V and 100V Hi-Z Support

The product page lists Hi-Z output ratings of 2 x 3400W at 100V and 2 x 2400W at 70V. These ratings may be relevant when considering the amplifier for high-voltage distributed speaker systems.

Before installation, confirm the output configuration and compatibility with the speakers, transformers and wiring against the manufacturer's official technical documentation.

6. Wide Frequency Response

The amplifier has a published frequency response of 20Hz to 20kHz. This range covers the operating bandwidth of many full-range sound systems. When paired with suitable loudspeakers and signal processing, the QX2-4000 can serve as a power amplification solution for live sound and fixed installations.

7. High Signal-to-Noise Ratio

The listed signal-to-noise ratio is greater than 112dB. This specification describes the relationship between the audio signal and the amplifier's background noise. In a properly configured sound system, a high signal-to-noise ratio helps support clear audio reproduction.

8. Selectable Input Sensitivity and Gain Options

The StudioMaster QX2-4000 lists four input sensitivity/gain options: 41dB, 38dB, 35dB and 32dB. These settings give system technicians more flexibility when matching the amplifier with mixers, signal processors and other audio equipment.

The appropriate setting should be selected according to the source output level, loudspeaker sensitivity and overall system configuration to avoid signal overload.

9. Multiple Operating Modes

The amplifier supports Stereo, Parallel and Bridge modes, offering flexibility for different sound system designs:

• Stereo: independently amplifies the left and right channels.
• Parallel: feeds the same input signal to both amplifier channels.
• Bridge: combines both channels into one higher-power output.

These operating modes allow the QX2-4000 to be configured for a variety of loudspeaker applications.

10. Class D Amplifier Technology

The product description identifies the StudioMaster QX2-4000 as a Class D amplifier, 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 switching power supply and Power Factor Correction (PFC) technology. These details should be checked against the manufacturer's official technical documentation when verifying the hardware configuration or planning a large-scale installation.

11. Professional Balanced Input Connectivity

According to the product description, the amplifier features balanced XLR inputs for connection to mixers, signal processors and other professional audio equipment. Balanced connections help reduce interference along the signal path, particularly in installations that require longer cable runs.

12. Limiter and Protection Features

The product description mentions an output limiter, variable-speed cooling fan and protection mechanisms against overheating, overload, low voltage and DC output. These features are intended to support stable operation and help reduce risks to the connected loudspeaker system.

Users should consult the product manual or confirm with the distributor to verify the protection features fitted to the actual unit.

13. Applications of the StudioMaster QX2-4000

With its two-channel architecture and multiple power ratings, the StudioMaster QX2-4000 can be considered for a range of professional sound applications, including:

• Live stages and event sound systems.
• High-power full-range loudspeakers.
• Subwoofer systems.
• Line array systems.
• Auditoriums and event venues.
• Professional bars, clubs and entertainment spaces.
• Fixed installations and mobile sound systems.

The final system performance depends on amplifier power matching, speaker impedance, wiring configuration and the operating requirements of the installation.

14. Why Choose the StudioMaster QX2-4000 Power Amplifier?

The StudioMaster QX2-4000 is worth considering for professional sound systems that need a high-output two-channel amplifier with multiple operating modes and a compact rack design. Key highlights include:

• Stereo output up to 2 x 3400W at 4Ω.
• Published support for 2Ω operation.
• Bridge output up to 9520W at 4Ω.
• Published 70V and 100V Hi-Z output ratings.
• Frequency response of 20Hz–20kHz.
• Selectable input sensitivity/gain options.
• Compact 1U rack design and approximately 9kg weight.

The StudioMaster QX2-4000 is a potential solution for sound system integrators, live sound technicians and users seeking high-power amplification. For the best results, match the amplifier with compatible loudspeakers, signal processors and wiring configurations.