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Summary of Contents for Universal Audio 4-710d
- Page 1 Model 4-710d Four-Channel Tone-Blending Mic Preamplifier Universal Audio Part Number 65-00051 Revision A Universal Audio, Inc. Customer Service & Tech Support: +1-877-MY-UAUDIO Business, Sales & Marketing: +1-866-UAD-1176 www.uaudio.com...
- Page 2 Universal Audio Model 4-710d. Disclaimer The information contained in this manual is subject to change without notice. Universal Audio, Inc. makes no warranties of any kind with regard to this manual, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose.
- Page 3 Notices Important Safety Information Before using this unit, be sure to carefully read the applicable items of these operating instructions and the safety suggestions. Afterwards, keep them handy for future reference. Take special care to follow the warnings indicated on the unit, as well as in the operating instructions. 1.
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Page 4: Table Of Contents
Connector Types .............................. 40 Mechanical and Power ............................ 40 Index ..............................41 Additional Resources ..........................43 Universal Audio Website ..........................43 Product Registration ............................43 Warranty ................................. 43 Service & Support ............................43... -
Page 5: Introduction
The A/D converters include LED metering, and an 8-channel soft limiter helps prevent digital overs. Most of us at Universal Audio are musicians and/or recording engineers. We love the recording process, and we really get inspired when tracks are beautifully recorded. Our design goal for the 4-710d was to build a hybrid mic preamp and A/D converter that we would be delighted to use ourselves—one that would induce that “a-ha”... -
Page 6: Overview
Introduction 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. -
Page 7: The Two Page, Two Minute Guide To Getting Started
It will tell you everything you need to know to get your Universal Audio 4-710d up and running, without bogging you down with details. Of course, even the most expert of us has to crack a manual every once in awhile. As the saying goes, “as a last resort, read the instructions.”... -
Page 8: Getting Started
Getting Started 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 connector. Step 11: Power on the 4-710d. The front-panel meters will light up. ... -
Page 9: Front Panel Descriptions
Front Panel Descriptions Analog Controls The controls for channels 1-4 are identical, so each control is only described once. (1) Hi-Z Inputs - Connect a high impedance signal from an instrument such as electric guitar or bass to these standard unbalanced 1/4" phone jack connectors. The 4-710d’s jack detection circuitry automatically switches from the selected rear panel MIC or LINE input to the channel’s front panel Hi–... -
Page 10: Front Panel
Front Panel (4) Level - This is the channel’s master volume control. It determines the amplitude of the signal sent to the rear panel LINE OUTPUT ( #8 on page 16) and INSERT SEND ( #11 on page 16) jacks. This control also sets the level sent to the A/D converter inputs. - Page 11 Front Panel (9) Meter Function - This three-position switch determines what the channel’s VU meter displays. In the up (OUTPUT) position, it shows the final output level in dB. "0" on the VU meter corresponds to +4 dBu at the analog outputs and -16 dBFS at the A/D converter inputs. In the down (DRIVE) position, it shows the input level to the tube stage after the front panel Gain control, but before the Blend and Level controls, thus giving an accurate gauge of how hard the tube and solid-state preamplifiers are being driven.
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Page 12: Digital Controls
Front Panel Digital Controls (14) Power - Turns the 4-710d power on or off. When powered on, the front panel meters light up. The 4-710d should be powered off when it is not being used for extended periods of time. (15) Bit Depth –... - Page 13 Front Panel (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-segment level indicator. The lower LED illuminates green when the incoming signal is between -37 dBFS and -6 dBFS. This LED displays the signal level continuously (it does not have peak/hold functionality).
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Page 14: Rear Panel Descriptions
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 format on this standard DB-25 connector. The 4-710d AES/EBU output supports “Single Wire” mode at all available 4-710d sample rates. The AES/EBU output does not support “Dual Wire” mode at sample rates above 96 kHz. -
Page 15: Analog Connectors
Rear Panel (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 master and the clock rate sent by this port is specified by the Sample Rate knob ( ... -
Page 16: Rear Panel
Rear Panel Two 4-710d units can combined using these inputs to obtain eight mic pre channels on one 8-channel digital stream. Simply connect the channel 1–4 line outputs of the first unit to the line inputs 5–8 of the second unit; the digital outputs of the second unit will now contain the combined mic pres of both units! Note: There are no analog outputs for line inputs 5–8. -
Page 17: Interconnection Diagrams
Interconnection Diagrams Analog-Only Setup This diagram illustrates a typical system using the 4-710d in an analog-only configuration, such as when using it as the front end to a public address system or analog recording device. In this setup, the digital features of the 4-710d are not used. The example shows a microphone connected to channel 1, a keyboard connected to the insert return of channel 2 (to use the ”... -
Page 18: Basic Digital Setup
Interconnections Basic Digital Setup This diagram illustrates a typical system using the 4-710d as the front end of a digital recording setup. A variety of input sources are used, with the 4-710d performing A/D conversion on the inputs. In this setup, the converted input signals are sent to the computer digitally via the ADAT lightpipe, and the software monitoring features of the DAW are used to monitor the 4-710d inputs. -
Page 19: Advanced Digital Setup
Interconnections Advanced Digital Setup This diagram illustrates a typical system using the 4-710d as the front end of a more complicated digital recording setup. A variety of input sources are used, with the 4-710d performing A/D conversion on the inputs while slaved to an external word clock. In this setup, the converted input signals are sent to the computer digitally via the AES/EBU output, and the software monitoring features of the DAW are used to monitor the 4-710d inputs. -
Page 20: Model 4-710D Overview
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/Hi-Z Preamplifier, combines our highly revered analog tube and solid state preamplification technology... but with a twist. Its unique phase-aligned Blend controls allow the user to literally dial in the desired sound, from precise ultra-clean solid-state tones to fat tube presence and overdriven crunch, or anywhere in between. - Page 21 Model 4-710d Overview Phantom Power Most modern condenser microphones require +48 volts of DC (Direct Current) power to operate. When delivered over a standard microphone cable (as opposed to coming from a dedicated power supply), this is known as “phantom” power. The 4-710d provides such power when the Phantom switch ( page 11) is engaged (placed in the +48V, up position), applying 48 volts to pins 2 and 3 of the rear panel output connector.
- Page 22 Model 4-710d Overview A/D Conversion The 4-710d conveniently provides eight channels of high-quality analog to digital (A/D) conversion with digital output via AES/EBU DB-25 and ADAT optical connectors. No matter what task you give it, the 4-710d can dramatically improve the quality of your audio environment. The 4-710d provides up to eight channels of sterling sound quality for tracking, monitoring and mastering, with full support for today’s higher sample rates of 88.2, 96, 176.4, and 192kHz.
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Page 23: Digital Clocking Primer
Digital Clocking Primer Digital clocking is a complicated issue, with a number of important aspects that are often not very well understood. First and foremost, a digital clock is used to maintain synchronization between different digital devices. There are two primary purposes for clock synchronization: 1. - Page 24 Digital Clocking Primer Clock jitter affects digital transmission and digital conversion differently, as follows: • Clock jitter in digital transmission can be caused by a bad source clock, inferior cabling or improper cable termination, and/or signal-induced noise (called “pattern-jitter” or “symbol-jitter.”) Digital signal formats like AES/EBU, S/PDIF, and ADAT all embed a clock in the digital signal so the receiving device can synchronize to the transmitted data bits correctly.
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Page 25: Insider's Secrets
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 age of digital recording): they impart a warmth and richness that makes most sounds larger than life. However, there is no denying that tube preamps also tend to color the incoming signal somewhat, albeit in a way which most listeners find pleasant and desirable. - Page 26 Insider’s Secrets 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 the contribution of the TRANS side). Electric Guitar and Bass There’s something very special about the mix of tube preamplification and electric guitar and bass, which is why tube amps are so prevalent in that world.
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Page 27: History Of The Model 4-710D
For these reasons, audio circuit designers such as Bill Putnam began creating pre- amplifiers using transistors instead of tubes. One of the first of these was the Universal Audio 1108. This was an exquisitely designed, widely used single-stage modular preamp made for modular re- cording consoles. - Page 28 The key is knowing which tools to reach for... and, in the case of preamplifiers, whether to opt for the “warmth” of tubes or the precision of solid-state. The Universal Audio 4-710d allows the recordist to literally enjoy the best of both worlds. Not only does it combine two preamplifiers per channel—one vacuum tube and one solid-state—in a single box, its unique Blend control allows the engineer to dial...
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Page 29: Glossary Of Terms
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 “Alesis Digital Audio Tape.” ADAT was the name given to the Alesis-branded products of the 1990s which recorded eight tracks of digital audio on a standard S-VHS video cassette. - Page 30 Glossary of Terms avoid signal degradation or undesirable audible artifacts, it is absolutely critical that all digital devices that are interconnected in a system be locked to the same clock. Clock Distribution – Refers to the process of routing a master clock signal (either from an internal clock or an external source) to multiple devices by means of multiple outputs, thus removing the need to cascade the clock through external devices, which can degrade the signal.
- Page 31 Glossary of Terms External Clock - A clock signal derived from an external source. (See “Clock”) FET - Short for “Field Effect Transistor” which is a type of transistor that relies on an electric field to control the shape, and hence the conductivity, of a “channel” in a semiconductor material. Front End - Refers to a device that provides analog and digital input/output (I/O) to a digital audio workstation (DAW).
- Page 32 Glossary of Terms Patch Bay - A passive, central routing station for audio signals. In most recording studios, the line-level inputs and outputs of all devices are connected to a patch bay, making it an easy matter to re-route signal with the use of patch cords. Patch Cord - A short audio cable with connectors on each end, typically used to interconnect components wired to a patch bay.
- Page 33 Glossary of Terms Transcoding - Converting one type of digital signal to another (i.e, from AES to SPDIF, or from ADAT to AES). Transformer - An electronic component consisting of two or more coils of wire wound on a common core of magnetically permeable material.
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Page 34: Maintenance
Maintenance The 4-710d contains no user-serviceable parts. Repair should be performed only by qualified service personnel. Contact Universal Audio for service information. Calibration The 4-710d is internally calibrated at the factory. Calibration should never be required and no user adjustments are available. -
Page 35: Session Recall Sheet
Session Recall Sheet... -
Page 36: Block Diagram
Block Diagram... -
Page 37: Specifications
Specifications Analog Section, Channels 1–4 Note: all specifications are typical performance unless otherwise noted. Unless otherwise noted, all specifications are 20 Hz-20 kHz, minimum gain, maximum level, 24 bits, all switches in neutral or off mode, 100% solid state, digital output = 0 dBFS. MICROPHONE PREAMPLIFIER TO LINE OUT Gain Range 56 dB... - Page 38 Specifications 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) -70 dB (0.03%) SNR (min gain, 1 kHz, A-wgt, 20 kHz BW) 110 dB SNR (max gain, 1 kHz, A-wgt, 20 kHz BW) 82 dB...
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Page 39: Analog-To-Digital Converter Section
Specifications Analog-To-Digital Converter Section Note: all specifications are typical performance unless otherwise noted. Unless otherwise noted, all specifications are 20 Hz-20 kHz, minimum gain, maximum level, 24 bits, all switches in neutral or off mode, 100% solid state, -1 dBFS output. Microphone Input THD+N (-1 dBFS) -100 dB (0.001%) -
Page 40: Digital Output Section
Specifications Digital Output Section Digital Output Formats AES/EBU 8 channels, 44.1-192kHz, single wire ADAT Optical 44.1-48kHz: Port 1 = channel 1-8 Port 2 = channel 1-8 (duplicate out) 88.2-96Khz (S/MUX™): Port 1 = channel 1-4 Port 2 = channel 5-8 176.4-192kHz (S/MUX™): Port 1 = channel 1-2 Port 2 = channel 3-4... -
Page 41: Index
Index 1176, 1, ii, 6, 27 Dynamic, 29, 30 610, ii, 27 EQ, 16, 27, 31 FCC Compliance, ii 75Ω Termination, 15 Features, 6 A/D Conversion, 22 FET, 27, 31 ADAT, 6, 15, 22, 24, 29, 31, 32, 33 Fuse, 34 ADAT Optical, 15, 22 Getting Started, 7 AES/EBU, 6, 14, 15, 22, 24, 29, 30, 32... - Page 42 Index Meter, 7, 8, 10, 11, 20, 40 slave, 15, 23 Metering, 25 S-MUX, 15, 22, 32 Microphone, 26, 40 Solid-State, 20, 40 Overview, 20 SPDIF, 32, 33 PAD, 7, 10 Support, 43 Polarity, 11, 16, 21 synchronization, 23, 24 Power, iii, 8, 12, 15, 21, 40 Trademarks, ii Rear Panel, 14...
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Page 43: Additional Resources
4. Click the “Submit” button to complete the registration process. Warranty The warranty for all Universal Audio hardware is one year from date of purchase, parts and labor. Service & Support Even gear as well designed and tested as ours will sometimes fail. In those rare instances, our goal here at UA is to get you up and running again as soon as possible.
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