Allen & Heath Qu-SB Portable Digital Mixer Review: Specs, Pros and Cons

What stands out

• 32 x 32 USB Audio Interface for multitrack recording
• 16 mono inputs plus 1 stereo input
• Up to 11 monitor mixes available
• 4 FX engines with ilive FX library

Who it fits

Key specs explained for Qu-SB

Mixer Type: Digital

This unit processes audio signals using internal software rather than purely analog circuits. You control parameters like EQ and dynamics through the interface or remote app. This allows for precise recall of settings and complex routing. It suits users who need flexible signal management without physical knobs for every function, a common feature in modern DJ controllers.

USB Audio Interface: 32 x 32

The mixer acts as a 32-input and 32-output audio interface for your computer. You can send individual channel tracks to a DAW for recording and receive playback tracks back into the mixer. This high channel count supports multi-track recording and complex live setups. It matches the connectivity standards found in professional DJ gear and studio interfaces.

Built-In Effects: 4 FX engines

The mixer includes four separate effect processors that you can apply to inputs or mixes. These engines likely include reverb, delay, and modulation effects from the ilive library. You can route these effects via dedicated sends and returns. This provides real-time sound shaping without external hardware, similar to the effect sections integrated into many contemporary DJ controller units.

Dimensions: 21.7 x 10.6 x 10.6 inches

The physical footprint is compact, measuring just over one and a half feet wide. This size allows it to fit on standard tables or stands in tight spaces. The height suggests a flat profile for easy transport. For DJs comparing gear, this size indicates a portable design that balances control surface area with travel convenience, fitting into smaller venues or mobile setups.

Weight: 12 pounds

At twelve pounds, the unit is lightweight enough for frequent transport by a single person. It is heavy enough to remain stable during operation but light enough for gigging musicians. This weight class aligns with portable digital mixers and mid-sized DJ controllers. It ensures durability without becoming a burden during setup and teardown at different performance locations.

Design and build specs

The Allen & Heath Qu-SB is a portable digital mixer with a compact footprint. According to the listing, the unit measures 21.7 inches in width, 10.6 inches in length, and 10.6 inches in height. These dimensions allow it to fit into tight spaces on stage or in a studio setup. You can carry it with ease because it weighs 12 pounds. This weight balances durability with portability for touring musicians.

The chassis houses a Qu-32 core, which provides the processing power for 32 mono and three stereo input channels. You get 16 mono inputs using TRS and XLR connectors, plus one stereo input via TRS. This layout supports flexible connectivity for various sources. The rear panel includes 12 onboard mix outputs, covering left-right, four mono mixes, and three stereo mixes. A stereo matrix output adds further routing options for complex productions.

As a digital mixer, it relies on software for control rather than physical knobs for every function. You manage parameters like EQ and dynamics through the interface or a remote app. This approach allows for precise recall of settings and complex routing without cluttering the surface. The design prioritizes a clean, functional layout that supports quick setup. You benefit from a professional build that remains manageable for travel. The compact size does not sacrifice the number of inputs or outputs available for your signal chain.

Setup and everyday use

This mixer is designed for iPad control, which defines how you set it up and operate it daily. The unit features a Qu-32 core inside, giving you access to 32 mono and 3 stereo input channels. You connect up to 16 mono inputs using TRS or XLR cables, plus one stereo input. This provides flexible connectivity for live sound or studio work. The device also acts as a 32 x 32 USB audio interface. You can route signals directly to your computer for recording or playback. For monitoring, the mixer offers up to 11 monitor mixes. These include four mono and seven stereo options. You have twelve onboard mix outputs and one stereo matrix output. This allows you to send specific mixes to different areas or performers. The unit includes four FX engines from the ilive FX library. You can use four FX sends and returns to apply effects to your channels. The analogiq preamps are recallable, meaning you can save and load your settings quickly. You can also record multitrack audio directly to USB drives. For larger venues, the dsnake remote audio port allows expansion up to 38 inputs. This setup supports complex routing without needing extra hardware. The portable form factor and compact size make it easy to transport. You can set it up quickly for gigs or studio sessions. The iPad interface simplifies control, allowing you to adjust levels and EQ remotely. This workflow reduces the need for physical faders for every channel. The mixer handles both live and studio tasks efficiently. You get professional features in a package that fits in a small space. The USB connectivity ensures seamless integration with your digital audio workstation. You can record multiple tracks simultaneously while controlling the mix in real time. This makes the Qu-SB a versatile tool for various audio applications.

Before You Buy The Qu-SB

You need an iPad to operate this mixer. The listing confirms it is designed for iPad control. You must check your device compatibility before purchasing. Ensure your tablet runs the required software. You also need USB drives for direct multitrack recording. The mixer supports Qu-drive playback on these drives. Keep spare drives for backup sessions. This unit sits alongside other portable options on this page. It offers a Qu-32 core in a smaller form. Compare its 18 inputs and 14 outputs with other 1 choices. Consider if you need dSnake expansion for larger venues. The 32 x 32 USB interface connects to computers. Verify your computer’s USB ports match this requirement. Upkeep involves keeping the firmware updated. The ilive FX library provides effects without extra gear. Check if your existing audio gear fits the TRS and XLR inputs. This mixer suits users who prioritize compact size and digital routing. It is not a traditional DJ controller. It serves live sound and studio applications better.

Check before you buy

• Verify iPad compatibility for full control
• Check USB drive format for recording
• Confirm computer USB ports for interface
• Review input connections for your gear
• Compare size with other 1 mixers

The product at a glance

1

Allen & Heath Qu-SB Portable Digital Mixer

Best for: mobile live sound engineers needing extensive routing

Mixer Type

Digital

USB Audio Interface

32 x 32 USB Audio Interface

Built-In Effects

4 FX engines, ilive FX library

Form Factor

Portable

Dimensions

10.6 × 21.7 × 10.6 inches

Weight

12 pounds

View on Amazon: Allen & Heath Qu-SB Portable Digital Mixer Affiliate link

The Allen & Heath QU-SB is a portable digital mixer built around the Qu-32 core. It offers 18 inputs and 14 outputs, including 12 on-board mix outputs and one stereo Matrix out. You get a 32x32 USB audio interface and direct multitrack recording via Qu-drive. It weighs 12 pounds and measures 21.7 inches wide. This unit suits live sound engineers needing robust routing and iPad control.

Pros

• Qu-32 core with 32 mono and 3 stereo input channels
• 18 total inputs: 16 mono and 1 stereo
• 14 outputs including 12 on-board and 1 stereo Matrix
• Up to 11 monitor mixes available
• 32x32 USB audio interface for computer integration

Cons

• Weighs 12 pounds, adding bulk to transport
• Width of 21.7 inches requires significant rack or table space
• Requires iPad for primary control interface

Good fit if

• You need a high channel count in a portable form factor
• You require extensive monitor mixing options for live performances
• You want direct multitrack recording capabilities via USB

Skip if

• You prefer a compact unit under 10 pounds
• You need a mixer with a built-in display screen
• You only require a simple stereo mixing solution

Verdict: The Allen & Heath QU-SB Portable Digital Mixer delivers professional-grade routing and recording for mobile engineers. It fits users who prioritize channel count and monitor flexibility over minimal weight.

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