Universal Audio 4-710D

Tone Blending Twin-Finity Microphone Preamp and DI

The 4-710d from Universal Audio is a high-end, 4-channel microphone/line preamplifier with tube and solid-state tone blending capabilities. The dual signal path is perfect for a wide range of microphone and instrument sources, with each channel offering selectable 1176-style compression circuitry. Four additional line inputs feed 8-channels of pristine analog-to-digital conversion.

The 1176-style compression include specially tuned “fast” and “slow” settings, and can be completely switched out of the signal chain. Each of the microphone preamp channels allows for continuously variable phase-aligned tone, between a 100% tube and 100% solid-state signal path. Send and return jacks are available for external processing or signal access.

The 8 analog inputs are digitized via ultra high-quality 24-bit analog to digital converters at selectable sample rates up to 192kHz. Digital output is available via dual ADAT Lightpipe connectors (SMUX supported), or via a 25-pin D-sub connector for 8-channels of AES/EBU, allowing for easy integration with most popular audio interfaces.

Preamplifiers

• Four TEC Award-winning 710 Twin-Finity microphone/line preamps
• Dual-path 285-volt Class-A tube and transimpedance solid-state preamps
• Phase-aligned tone-blending of tube and solid state circuits, creamy to crunchy
• Newly designed 1176-style compression circuit per preamp channel
• JFET Direct Input with 2.2MΩ ultra Hi-Z impedance with auto input override
• Large backlit VU meters for flexible metering of input drive, gain level and gain reduction
• Balanced send/return inserts (half-normalled)
• 48V phantom power individually switchable
• 75Hz low-cut filter
• Polarity switch
• Monolithic balanced output stage

Analog-to-Digital Conversion

• Eight channels of high quality 24-bit analog to digital conversion
• Selectable sample rates up to 192kHz
• Digital output via dual ADAT optical and AES/EBU DB-25 connectors
• 8-channel soft limiter (switchable for all channels)
• Ultra-low jitter clock subsystem
• LED metering array with clip/hold indicators
• 75Ω BNC work clock I/O
• Digital outputs anti-pop protection on power-up

Other

• Universal voltage internal power supply
• Heavy-duty metal construction, two-space rack unit

FEATURES

• 4 Channel
• Dual-Path
• 1176-Style Compressor per Channel
• Send/Return Inserts
• Discrete JFET DI
• 8-Channel 24-bit AD Conversion
• Phantom Power
• Low-Cut Filter, Pad and Phase Inverse
• Internal Universal Power Supply