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Universal Audio 4-710d Twin-Finity

The Universal- Audio 4-710d four-channel microphone pre-amplifier is a new generation product, ideal for a wide selection of microphones and instruments. UA has given this hybrid pre-amp a 310V Class A single-ended triode tube pre-amp and a separate Class A FET solid state pre-amp circuit. Giving it the ability to blend the two parallel signals in each channel directly from their source. The 4-710d builds on the legacy of the UA 1176, one of the most used compressors of all time, by offering selectable true bypass and 1176-type circuitry on each of its four channels. There is also ADAT Optical, feeding eight more channels of A/D conversion using ultra high-quality 24 bit analog to digital converters at sample rates up to 192 kHz.

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Category: Recording:Hardware:Pre-Amps


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At the heart of the UA4-710d are the four channels of Twin-Finity mic pre-amps, making it unique in its ability to change the balance and blend between two completely separate (completely transistor-based or completely tube-based) mic pre-paths in the same package. This results in continuous variable blending range from all transistor to all tube or anywhere between the two. Since the two paths of each of the four mic channels are completely phase aligned, they can be blended and balanced to suit any musical endeavor. The 1176-style compressor of each mic pre-amp has a fixed compression ratio of 4:1, but offers attack time controls giving the ability to change the settings from a fast attack time of about 0.2 milliseconds to a slow attack time of about 200 milliseconds.

Eight digital outputs caneasily integrate with most audio interfaces through either dual ADAT lightpipe optical interfaces with S/MUX capabilities or via AES/EBU DB-25 connectors making it an ideal front end box for use with a Digital Audio Workshop or for a live performance application.

Product Features & Specifications: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 2.2M 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 power75 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
  • 75 BNC work clock I/O
  • Digital outputs anti-pop protection on power-up

  • Universal voltage internal power supply
  • Heavy-duty metal construction, two-space rack unit
  • One year warranty including parts and labor