Introduction
6
Overview
The Universal Audio 4-710d is a four-channel microphone/line preamplifier with tube and solid-state
tone blending, offering four additional line inputs, dynamics control, and eight channels of pristine
analog-to-digital conversion. The 4-710d combines UA’s classic design approach with several modern
innovations, creating a unique studio device suited to a wide range of applications.
At the core of the 4-710d are four channels of tone-blending “Twin-Finity” mic preamps with true-
bypass 1176-style compression. Each of the four mic preamp channels allows for continuously
variable phase-aligned tone between 100% tube and 100% solid-state. Send and return jacks are
available for external processing or signal access.
The eight analog inputs are digitized via high-quality 24-bit A/D converters at selectable sample rates
up to 192 kHz. Digital output is available via dual ADAT “lightpipe” or AES/EBU DB-25 connectors,
facilitating integration with most popular audio interfaces.
Features
Preamplifiers
• Four TEC Award-winning 710 Twin-Finity™ microphone/line preamps, each featuring:
• 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 w/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
• 75 Hz low cut filter
• Polarity switch
• Monolithic balanced output stage
Analog-to-Digital Conversion
• Eight channels of high quality 24-bit A/D conversion:
• Selectable sample rates up to 192 kHz
• 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
• One year warranty including parts and labor
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