Universal Audio 4-710d Operations Instructions Page 1

Model 4-710d Four-Channel Tone-Blending Mic Preamplifier Universal Audio Part Number 65-00051 Revision A Universal Audio, Inc. Cust

Front Panel 10 (4) Level - This is the channel’s master volume control. It determines the amplitude of the signal sent to the rear panel LINE OUTPUT

Front Panel 11 (9) Meter Function - This three-position switch determines what the channel’s VU meter displays. In the up (OUTPUT) position, it shows

Front Panel 12 Digital Controls (14) Power - Turns the 4-710d power on or off. When powered on, the front panel meters light up. (15) Bit Depth –

Front Panel 13 (18) Digital Out Level - These LEDs indicate the signal level of the A/D converters. Each of the eight A/D channels has its own two-s

14 Rear Panel Descriptions Digital Connectors (1) AES/EBU Out – All eight channels of the 4-710d’s A/D converters are output in AES/EBU digital f

Rear Panel 15 (3) Word Clock Out – This BNC connector transmits a standard (1x) word clock. For all settings except W/C, the 4-710d is the clock mast

Rear Panel 16 Two 4-710d units can combined using these inputs to obtain eight mic pre channels on one 8-channel digital stream. Simply connect the ch

17 Interconnection Diagrams Analog-Only Setup This diagram illustrates a typical system using the 4-710d in an analog-only configuration, such as wh

Interconnections 18 Basic Digital Setup This diagram illustrates a typical system using the 4-710d as the front end of a digital recording setup. A va

Interconnections 19 Advanced Digital Setup This diagram illustrates a typical system using the 4-710d as the front end of a more complicated digital r

ii Notices This manual provides general information, preparation for use, installation and operating instructions for the Universal Audio Model 4-710d

20 Model 4-710d Overview The Universal Audio 4-710d, with its four mic preamps derived from our TEC award-winning UA Model 710 Twin-Finity Mic/Line/H

Model 4-710d Overview 21 Phantom Power Most modern condenser microphones require +48 volts of DC (Direct Current) power to operate. When delivered ove

Model 4-710d Overview 22 A/D Conversion The 4-710d conveniently provides eight channels of high-quality analog to digital (A/D) conversion with digita

23 Digital Clocking Primer Digital clocking is a complicated issue, with a number of important aspects that are often not very well understood. Firs

Digital Clocking Primer 24 Clock jitter affects digital transmission and digital conversion differently, as follows: • Clock jitter in digital transm

25 Insider’s Secrets The Best of Both Worlds There’s a reason why tube preamplifiers have long been favored by audio engineers (especially in this ag

Insider’s Secrets 26 complementing it with the 4-710d’s solid-state preamp (or use the Blend control to dial in a combination of the two that favors t

27 History of the Model 4-710d Like the microphone, preamplifiers come in all shapes, sizes and colors. And, like a microphone, the preamp is one of

History of the Model 4-710d 28 Throughout the years, solid-state preamplifiers have evolved into ever more sophisticated designs (such as the Precisio

29 Glossary of Terms A/D - An acronym for “Analog to Digital,” which refers to the conversion of analog signal to digital. ADAT - An acronym for “Ale

Notices iii Important Safety Information Before using this unit, be sure to carefully read the applicable items of these operating instructions and th

Glossary of Terms 30 avoid signal degradation or undesirable audible artifacts, it is absolutely critical that all digital devices that are interconne

Glossary of Terms 31 External Clock - A clock signal derived from an external source. (See “Clock”) FET - Short for “Field Effect Transistor” which is

Glossary of Terms 32 Patch Bay - A passive, central routing station for audio signals. In most recording studios, the line-level inputs and outp

Glossary of Terms 33 Transcoding - Converting one type of digital signal to another (i.e, from AES to SPDIF, or from ADAT to AES). Transformer - An e

34 Maintenance Calibration The 4-710d is internally calibrated at the factory. Calibration should never be required and no user adjustments are avai

35 Session Recall Sheet 4-710d TONE-BLENDING MIC PREAMPLIFIERSession Recall Sheet

36 Block Diagram

37 Specifications Analog Section, Channels 1–4 Note: all specifications are typical performance unless otherwise noted. Unless otherwise noted, all s

Specifications 38 Solid State @ 100% – LINE IN TO LINE OUT THD+N (min gain, 1 kHz, 20 kHz BW) -101 dB (0.0009%) THD+N (max gain, 1 kHz, 20 kHz BW) -7

Specifications 39 Analog-To-Digital Converter Section Note: all specifications are typical performance unless otherwise noted. Unless otherwise noted,

Table Of Contents iv Notices ...

Specifications 40 Digital Output Section Digital Output Formats AES/EBU 8 channels, 44.1-192kHz, single wire ADAT Optical 44.1-48kHz: Port 1 = chan

41 Index 1176, 1, ii, 6, 27 610, ii, 27 75Ω Termination, 15 A/D Conversion, 22 ADAT, 6, 15, 22, 24, 29, 31, 32, 33 ADAT Optical, 15, 22 AES/EBU, 6,

Index 42 Meter, 7, 8, 10, 11, 20, 40 Metering, 25 Microphone, 26, 40 Overview, 20 PAD, 7, 10 Polarity, 11, 16, 21 Power, iii, 8, 12, 15, 21, 40 Rear P

43 Additional Resources Universal Audio Website We’ve got a pretty cool website, if we may say so ourselves. Check us out at http://www.uaudio.com.

5 Introduction A Letter from Bill Putnam Jr. Thank you for purchasing the Model 4-710d Four-Channel Tone Blending Mic Preamplifer — Universal Audio&a

Introduction 6 Overview The Universal Audio 4-710d is a four-channel microphone/line preamplifier with tube and solid-state tone blending, offering fo

7 The Two Page, Two Minute Guide to Getting Started No one likes to read owner’s manuals. We know that. We also know that you know what you’re doing

Getting Started 8 Step 10: Make sure the Power switch is off (down position) and then connect the supplied IEC power cable to the rear panel AC power

9 Front Panel Descriptions Analog Controls (1) Hi-Z Inputs - Connect a high impedance signal from an instrument such as electric guita