Features & Applications
Features
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Applications
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Detailed Description Qu-SB
Qu-SB is a Allen & Heath Qu Classic digital mixer with 16 onboard microphone/line inputs and 32 mono processing channels. Its 48 kHz architecture combines recallable AnalogiQ preamps, channel processing and four stereo FX engines. The format provides remote mixing from Qu-Pad through an external Wi-Fi router.
Additional input capacity is available through compatible dSNAKE AudioRacks; the number of physical input sockets remains distinct from the mix-engine channel count. Input processing includes high-pass filtering, a gate, parametric EQ, compression and delay. Mix outputs add graphic EQ for system and monitor shaping. Scene memories, recall filters, DCA groups and automatic mic mixing support repeatable operation.
The USB-B interface handles computer multitrack recording and playback, while Qu-Drive captures eighteen tracks directly to compatible USB storage. dSNAKE connects remote I/O and Allen & Heath ME personal monitoring. This model has no onboard display or faders and requires an external wireless access point for tablet control.
Manufacturer documents: Technical Datasheet · Qu Classic Brochure
Technical Specifications Qu-SB
Architecture and control |
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|---|---|
| TYPE | 48 kHz digital mixer |
| MONO PROCESSING CHANNELS | 32 |
| LOCAL MIC/LINE INPUTS | 16 |
| STEREO LINE INPUTS | 1 |
| MIXES | 4 mono, 3 stereo, Main LR |
| STEREO GROUPS | 4 |
| STEREO MATRICES | 2 |
| LOCAL XLR MIX OUTPUTS | 12 |
| RACKFX | 4 stereo engines with dedicated stereo returns |
| DCA / MUTE GROUPS | 4 / 4 |
| SCENE MEMORIES | 100; safes and recall filters |
| AUTOMATIC MIC MIXING | Built-in AMM |
| CONTROLS | Qu-Pad app through an external Wi-Fi router; no onboard display or faders |
Analog inputs |
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| MIC/LINE INPUT TYPE | Balanced XLR and 1/4-inch TRS; fully recallable |
| INPUT SENSITIVITY, XLR / TRS | −60 to +5 dBu / −50 to +15 dBu |
| ANALOG GAIN | −5 to +60 dB, 1 dB steps |
| MAXIMUM INPUT, XLR / TRS | +19 dBu / +29 dBu |
| INPUT IMPEDANCE, XLR / TRS | >5 kΩ / >10 kΩ |
| THD+N AT UNITY GAIN | 0.0005%, −89 dBu; 20 Hz–20 kHz, Direct Out at 0 dBu, 1 kHz |
| THD+N AT +30 DB GAIN | 0.001%, −83 dBu; 20 Hz–20 kHz, Direct Out, 1 kHz |
| STEREO LINE CONNECTORS | Balanced TRS |
| STEREO INPUT SENSITIVITY | Nominal +4 dBu |
| STEREO TRIM | ±24 dB |
| MAXIMUM STEREO INPUT | +22 dBu |
| STEREO INPUT IMPEDANCE | >7 kΩ |
Outputs and system |
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| MIX OUTPUT CONNECTORS | Balanced XLR |
| OUTPUT IMPEDANCE | <75 Ω |
| NOMINAL / MAXIMUM OUTPUT | +4 dBu / +22 dBu |
| RESIDUAL OUTPUT NOISE | −90 dBu, muted, 20 Hz–20 kHz |
| DYNAMIC RANGE | 112 dB |
| FREQUENCY RESPONSE | 20 Hz–20 kHz, +0/−0.5 dB |
| HEADROOM | +18 dB |
| INTERNAL OPERATING LEVEL | 0 dBu |
| DBFS ALIGNMENT | +18 dBu = 0 dBFS; +22 dBu at XLR output |
| METER CALIBRATION | 0 dB meter = −18 dBFS; +4 dBu at XLR output |
| PEAK / SIGNAL INDICATION | −3 dBFS / −48 dBFS; multi-point sensing |
| METER RESPONSE | Fast, peak |
| SAMPLE RATE | 48 kHz ±100 ppm |
| CONVERTERS | 24-bit Delta-Sigma |
| LATENCY | 1.2 ms local XLR input to XLR output |
Input processing |
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| SOURCE SELECTION | Local, dSNAKE or USB; Qu-Drive / USB-B global USB-source selection |
| STEREO LINKING | Odd/even input pairs; selectable parameter links |
| POLARITY | Normal / reverse |
| HIGH-PASS FILTER | 12 dB/oct; 20 Hz–2 kHz |
| INSERT | Internal FX1–4 |
| INPUT DELAY | Up to 85 ms |
| GATE | Self-key sidechain; −72 to +18 dBu threshold; 0–60 dB depth |
| GATE ATTACK / HOLD / RELEASE | 50 µs–300 ms / 10 ms–5 s / 10 ms–1 s |
| PEQ | 4-band, fully parametric, 20 Hz–20 kHz; ±15 dB |
| PEQ BAND TYPES | LF / HF shelving or bell; middle bands bell |
| BELL WIDTH | Non-constant Q, 1.5 to 1/9 octave |
| COMPRESSOR THRESHOLD / RATIO | −46 to +18 dBu / 1:1 to infinity |
| COMPRESSOR ATTACK / RELEASE | 300 µs–300 ms / 100 ms–2 s |
| KNEE | Soft / hard |
| COMPRESSOR MODES | Peak Manual, RMS Manual, SlowOpto, PunchBag |
Mix processing and tools |
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| DIRECT OUT | Global source: Post-Preamp, Pre-EQ, Post-EQ or Post-Delay; follow fader / mute options |
| MIX DELAY | Up to 170 ms |
| MIX GEQ | 28 bands, 31 Hz–16 kHz; ±12 dB; constant 1/3 octave |
| MIX PEQ / COMPRESSOR | As input processing |
| FX ROUTING | Send / return or insert; dedicated stereo return channels with 4-band PEQ |
| PAFL | PFL or stereo in-place AFL; 0 to −24 dB trim; up to 85 ms delay |
| TALKBACK | Assignable to mixes; 12 dB/oct HPF |
| SIGNAL GENERATOR | Sine, white / pink / band-pass noise |
| RTA | 31-band, 1/3 octave, 20 Hz–20 kHz; follows PAFL |
Recording and connectivity |
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| QU-DRIVE STEREO RECORD | 2-channel WAV, 48 kHz, 24-bit; patchable source |
| QU-DRIVE STEREO PLAYBACK | 2-channel WAV, 44.1 / 48 kHz, 16 / 24-bit |
| QU-DRIVE MULTITRACK RECORD / PLAYBACK | 18 channels, WAV, 48 kHz, 24-bit |
| USB-B STREAMING | 24-bit, 48 kHz; 32 sends / 32 returns |
| DSNAKE | Remote audio with AR2412, AR84 and AB168; ME personal-monitor compatibility |
| CONTROL NETWORK | TCP/IP Ethernet for MIDI and remote apps; external Wi-Fi router required for wireless operation |
| USB DATA | Show, scene and library transfer |
Power and environment |
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| MAINS | 100–240 V AC, 50/60 Hz |
| MAXIMUM POWER CONSUMPTION | 55 W in A&E specification; technical table also prints 150 W — confirm the supplied hardware label |
| OPERATING TEMPERATURE | 0–35°C |
Dimensions and weight |
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| DIMENSIONS (W × D × H) | 435.5 × 174.5 × 161 mm |
| WEIGHT | 5.7 kg |
| PACKED DIMENSIONS (W × D × H) | 550 × 270 × 270 mm |
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