Allen & Heath SQ-5 Review 2026 Digital Mixer Channels Recording and Networking

 

QUICK VERDICT

The Allen & Heath SQ-5 is a compact professional digital mixer built around XCVI FPGA processing, 48 input channels and 36 buses. Its surface provides 17 motorised faders across six layers, a seven-inch touchscreen, dedicated processing controls, scene memories and configurable SoftKeys. The console also includes 16 local microphone preamps, SLink expansion, an optional audio-networking card slot and a 32×32 USB audio interface.

The SQ-5's appeal comes from the amount of processing and routing contained in a relatively compact surface. A production with substantial channel, monitor and effects requirements does not automatically need a large-format desk. The physical surface remains smaller than the internal mixer architecture, so layer organisation becomes a normal part of daily operation.

The console supports operation at 96kHz and provides a low-latency processing path suited to live monitoring applications. Its recording, remote I/O, networking and scene-management functions give it a role well beyond a basic digital mixer. The original SQ-5 should still be assessed against the actual system requirements, firmware, installed options and condition of the individual unit.

What a Digital Mixer Does in Live Production

A digital mixer takes several separate audio tasks and places them inside one controllable environment. A microphone channel can receive gain, high-pass filtering, EQ, dynamics processing and routing before reaching the main PA. That same source can feed monitor mixes, effects, recording outputs and matrix destinations from the same channel path.

Scene recall adds repeatability. Once a production has established its patching, levels, processing and routing, those settings can be stored within the show structure. Theatre productions benefit from cue-based operation, corporate shows benefit from repeatable room configurations, and touring engineers benefit from carrying a known console setup between venues.

Digital consoles also make remote I/O practical. Analogue microphone connections do not have to remain physically beside the FOH desk. Stageboxes can receive the signals closer to the stage, then transport digital audio to the console over an appropriate connection.

This makes the mixer part of a wider production system. The console, stagebox, network card, computer, personal-monitoring equipment and control software all affect the final workflow. A console that looks suitable from its channel count alone may still require a different I/O or network arrangement for a particular show.

SQ-5 Architecture and Operating Workflow

The SQ-5 uses Allen & Heath's XCVI FPGA engine and provides a low-latency signal path suited to live production and monitor work. The processing environment provides substantial channel treatment without relying on a rack of external processors for routine live mixing.

The surface has 17 motorised faders arranged across six layers. Sixteen assignable strips plus the master section provide access to input channels, mixes, effects returns, DCAs and other mixer functions. The active layer determines which channels appear under direct fader control.

That arrangement rewards careful show-file preparation. A band may place drums and percussion together, then move guitars, bass, playback and vocals onto dedicated layers. A theatre engineer can group channels around performers or sections of the production. A corporate event can put speech microphones and presentation sources in the most accessible positions.

The seven-inch touchscreen handles routing, setup and detailed processing. Dedicated controls remain available for frequent tasks including gain, high-pass filtering, gate threshold, compressor threshold, pan and EQ. The combination gives the SQ-5 a physical operating surface without requiring every function to sit behind touchscreen menus.

Eight assignable SoftKeys extend the surface further by providing shortcuts for tasks that need quick access during a performance. Scene memories, recall filters and channel safes add control over which parameters change during recall.

Digital Mixer Features and Specifications

The SQ-5 combines a 48-input architecture with 36 buses, giving the console enough internal capacity for sizable live productions. The mixer provides 12 stereo mixes plus the main LR bus, along with three stereo matrix buses. That arrangement creates a substantial routing structure for monitor mixes, side fills, distributed speaker systems, broadcast feeds and other outputs.

Processing operates through the XCVI FPGA architecture at 96kHz. The console is designed around a low-latency signal path, which matters in live monitoring because the engineer and performers need the audio system to respond quickly. Each input receives high-pass filtering, gate processing, four-band parametric EQ and compressor functions, giving the engineer the basic tools required to shape microphones and instruments without relying on a large external processor rack.

The SQ-5 has 17 motorised faders spread over six layers, supported by 16 channel displays, metering and a seven-inch capacitive touchscreen. The physical surface also includes eight assignable SoftKeys. This arrangement allows the engineer to organise the controls around the needs of the production instead of being restricted to a fixed channel order.

The console contains 16 local XLR microphone inputs, two stereo TRS line inputs and a stereo 3.5mm input. Output connectivity includes 12 XLR outputs, two TRS outputs and AES digital output. The local connections therefore handle a useful amount of analogue I/O, but the larger 48-channel architecture depends on remote or digital input sources once a production exceeds the local preamp count.

Recording is handled through a 32×32 USB audio interface and SQ-Drive direct USB capture. The SQ-5 also provides SLink connectivity for remote I/O, plus a 64×64 I/O port for optional audio-networking cards. DEEP Processing add-ons can extend the processing environment, and the console includes DCA and mute-group functions for larger show structures.

Scene management forms a major part of the SQ workflow. The console supports up to 300 scenes per show, with recall filters and channel safes providing control over which settings move during recall. That matters in theatre and repeat-event production because the engineer can store a known system state and alter only the parameters required for a particular cue.

The SQ-5 also supports automatic microphone mixing through two independent 24-channel AMM systems, which can operate together as a 48-channel automatic microphone mixer. This gives the console a useful role in conferences, panel sessions, speech-heavy theatre productions and similar applications.

Understanding the 48-Channel Rating

The Allen & Heath SQ-5 provides 48 input channels. This is an internal mixer capacity figure, not a count of local microphone sockets.

The desk itself has 16 local XLR microphone inputs. Additional sources reach the remaining internal channels through remote I/O or other compatible digital connections. This structure lets the console serve productions with substantially larger stage input counts than the rear panel alone suggests.

A smaller band may use only the local connections. A theatre or festival production can place microphone preamps on stage and send them through SLink to FOH. The internal mixer then treats those remote inputs as part of the same channel environment.

The Allen & Heath DX168 digital stagebox illustrates this approach with remote microphone and output connections that extend the SQ system beyond the console's built-in analogue I/O.

The distinction between channel capacity and physical I/O matters for production planning because the stagebox, cabling and digital transport become part of the system once the local inputs are exceeded.

Faders, Layers and Physical Control

The SQ-5's 17 motorised faders cannot display all 48 input channels simultaneously. Six layers provide access to the wider mixer, and the operator decides how those strips are arranged.

That arrangement suits custom show files. Channels used frequently can remain together, DCAs can occupy convenient positions and monitor mixes can receive dedicated assignments. When a scene is recalled, the motorised faders move to their stored positions.

The Allen & Heath SQ-6 uses the same SQ family architecture but provides a larger physical surface. The Allen & Heath SQ-7 expands the physical control concept again with a still larger surface.

These differences matter to engineers who rely heavily on direct physical access. The SQ-5 favours a compact control position, but the trade-off is greater reliance on layer management.

For touring work, the smaller footprint also affects transport and FOH placement. A compact console takes less physical space in a flight case and at a control position, which becomes useful when production vehicles and venue booths impose tight dimensions.

Processing, Buses and Effects

The SQ-5 provides input processing that includes high-pass filtering, gate, four-band parametric EQ and compressor functions. Mix outputs receive additional graphic EQ, parametric EQ, compression and delay. These functions keep a large amount of routine signal processing inside the console.

The 12 stereo mixes plus LR create a substantial monitor environment. Stereo IEM feeds can be assigned independently, and the buses can serve wedges, side fills and auxiliary destinations. Three stereo matrix buses create another routing stage for distributed speaker feeds, broadcast outputs and other derived mixes.

Eight stereo FX engines provide dedicated returns for reverbs, delays and modulation effects. Those returns do not use the main 48 input-channel allocation, leaving the input structure available for microphones, instruments and playback sources.

DEEP Processing adds optional processing models to the SQ platform. The presence of specific add-ons depends on the individual console, so a used SQ-5 should be assessed from its actual software and licence configuration.

Multitrack Recording and Virtual Soundcheck

The SQ-5 supports multitrack recording through its integrated 32×32 USB audio interface. A computer can receive multiple channels from the console and return audio for playback, recording, streaming and virtual soundcheck.

SQ-Drive provides a second recording route by writing audio directly to USB storage. It supports up to 16 channels at 96kHz or up to 32 channels at 48kHz, alongside stereo recording.

The two methods suit different production arrangements. A DAW-based setup provides a flexible environment for editing and long-form recording, whereas direct USB capture removes the computer from the recording path at the console.

Later SQ firmware introduced simultaneous recording through SQ-Drive and the USB interface. That gives productions another way to maintain a local recording alongside computer-based capture.

Virtual soundcheck is especially useful for touring and repeat venue work. A multitrack performance recording can be routed back through the console so an engineer can adjust EQ, compression, routing and monitor mixes without requiring the complete band setup on stage.

The Yamaha TF5 digital mixer provides another professional route into multichannel recording and networked audio. The Tascam Sonicview 16 also combines mixing, USB recording and network expansion in a compact production format.

Stage I/O, SLink and Network Expansion

SLink is central to the SQ platform because it extends the system beyond the console's local analogue connections. Remote stageboxes can place microphone preamps and outputs close to the stage, then send digital audio back to the SQ-5.

This arrangement becomes increasingly useful as a production grows. A small setup may remain within the console's built-in I/O, but a theatre, concert or festival system with larger stage input counts gains a cleaner cabling arrangement from remote stage I/O.

The console also has a 64×64 I/O port for optional networking cards. Dante, Waves and MADI options give the SQ-5 access to several professional network environments. The correct expansion hardware depends on the audio-networking system used by the production.

The DiGiCo S21 system with stageboxes and network cards shows how networked audio systems combine console hardware, remote I/O and protocol-specific expansion.

The Allen & Heath Avantis production workflow provides context for the wider Allen & Heath ecosystem, particularly for production teams working across several console families.

Personal monitoring also forms part of the SQ ecosystem through compatible ME systems. This allows performers to receive dedicated monitor control from the same wider audio environment.

Live Production Workflow

The value of a digital mixer becomes particularly clear during repeat performances. Once the channels, buses, routing and processing have been configured, the show structure provides a consistent starting point for rehearsals and performances.

The SQ-5 supports this through scene memories, recall filters, channel safes, DCAs, mute groups, custom fader layers and motorised controls. These functions reduce the amount of repetitive setup required during a run of shows.

The show file should still be treated as part of the technical system. A file created for one stagebox arrangement may not match another venue. Output routing, external network hardware and firmware versions all need to remain consistent with the system in use.

Remote software adds another control layer. SQ MixPad provides remote mixing access, SQ4You supports personal monitoring and SQ Control provides a custom control interface. Software versions need to match the console's firmware environment during production preparation.

The Yamaha DM3 digital mixer takes a smaller touch-oriented approach, whereas the Yamaha QL1 combines a compact surface with Dante and a broader installed-production feature set.

The operating difference between consoles becomes important once an engineer has to work quickly during a live show. Processing capability may look similar on a specification sheet, yet physical control, routing layout and software workflow can produce a very different working experience.

Corporate, Theatre and Speech Applications

The SQ-5 includes two independent 24-channel automatic microphone mixers, with the option to operate them together as a 48-channel AMM. This function suits conferences, panel discussions, broadcast-style speech work and other events with several open microphones.

Corporate productions often combine speech microphones with playback, presentation feeds, video-call audio and distributed room outputs. A digital mixer with scene recall and multiple buses gives the operator a structured way to manage those sources throughout a long event.

Theatre work places emphasis on repeatability. Cue-based scenes may alter levels, processing and routing as the production moves through different sections. The SQ-5's scene system, monitor buses and matrix outputs provide the internal architecture for that kind of workflow.

Houses of worship can use similar functions for speech, playback, musicians and monitor mixes. The compact surface also suits booths and control positions with limited physical space.

The same architecture suits smaller live music productions because input processing, effects, monitor routing and recording remain within one console environment.

Limitations of the SQ-5

The compact surface is the first obvious limitation. Seventeen motorised faders do not place all 48 channels under direct physical control at the same time. Layer management therefore becomes part of normal operation.

The 16 local microphone inputs create another boundary. A production with a high stage input count needs compatible remote I/O, adding stagebox hardware and digital transport to the system.

The touchscreen also carries a large share of the detailed setup workflow. Engineers who prefer large numbers of dedicated physical controls may feel the difference during rapid parameter changes.

Digital routing introduces another form of complexity. A flexible signal path creates many possible destinations, but it also requires disciplined patching, labelling and documentation.

Optional networking cards expand system capability but add further configuration requirements. Dante, Waves and MADI environments each bring their own equipment and network considerations.

Firmware changes also deserve controlled handling. A show file created on one software version should not be moved into a critical production without checking compatibility across the console, remote I/O and control applications.

The SQ-5 is a compact production console rather than a large-format touring desk. Its capabilities are substantial, but its physical control area should be assessed against the way the engineer actually works.

Used SQ-5 Assessment

The current SQ-5 digital mixer listing is identified as used equipment. The model specification describes the SQ-5 itself; it does not describe the physical condition of every used unit.

For a used console, motorised fader movement is one of the first areas to inspect because faders receive repeated physical use during production. Encoders, buttons, channel displays and the touchscreen also deserve functional checks.

The rear connections need attention because the SQ-5 may serve as the centre of a wider production system. XLR sockets, TRS connections, AES output, USB, SLink and the networking interface all support different workflows.

The touchscreen should respond consistently across its active area. Routing, processing and configuration depend heavily on the display, so an issue there has a direct operational effect.

Firmware version should be recorded before the console enters a production system. Installed DEEP Processing licences should also be documented because individual used consoles may carry different options.

Transport condition matters in rental and touring environments. Flightcase protection, connector security, surface condition and safe storage all affect the practical service life of a used production console.

Firmware and 2026 Relevance

The original SQ-5 remains part of the supported SQ platform. Firmware development has expanded the operating environment over time, including improvements related to recording, scene control and connected I/O.

The original SQ-5 and SQ5+ are separate hardware generations. Firmware branches and hardware capabilities should remain matched to the exact model, especially when show files and connected expanders are involved.

Software also forms part of the working environment. SQ MixPad, SQ4You, SQ Control, computer audio drivers and MIDI-control tools all need suitable version alignment with the console.

For rental fleets and venues already using SQ stageboxes, personal-monitoring systems or show files, continuing platform support has practical value. The useful service life of a console depends on hardware conditions as well as the software ecosystem surrounding it.

Production-System Fit

The SQ-5 fits systems that need substantial routing and processing from a compact control surface. Touring bands, theatres, corporate AV teams, houses of worship and regional production companies all have applications for this format.

A production already using Allen & Heath remote I/O gains a straightforward path into the SQ environment because SLink provides the connection between the console and compatible stage hardware.

The Yamaha LS9-32 digital mixer represents an earlier compact-console approach. Its hardware generation differs significantly, but it illustrates the same system questions around physical controls, input capacity, transport and expansion.

The Midas M32R digital mixing console is another compact professional workflow with motorised control, remote I/O and expansion options. The installed hardware matters when assessing a used configuration because networking and recording capabilities vary by fitted cards.

At the larger end, the Allen & Heath dLive C2500 with CDM48 represents a different production architecture with a separate control surface and MixRack. It addresses projects that require a substantially larger system than the SQ-5 format.

The SQ-5 therefore sits between small digital desks and large touring systems. Its physical size remains compact, but its internal processing, bus structure and expansion options support complex production work.

Who the SQ-5 Suits

The SQ-5 suits production teams that need a flexible digital mixer with a substantial internal channel and bus structure but do not require a large-format control surface. Its combination of routing, processing, recording, remote I/O and monitor facilities covers a broad professional workload.

It also fits teams already familiar with Allen & Heath equipment because show-file structures, SLink systems, ME personal monitoring and shared software concepts carry across the ecosystem.

A very small event with only a few inputs may not require 48 channels and this level of routing. A large touring production with extensive physical control demands may need a larger surface. A networked system built around Dante, Waves or MADI also requires the correct expansion hardware.

System requirements should therefore drive the decision: source count, local and remote I/O, monitor mixes, networking, recording, FOH footprint, transport and crew workflow all matter.