Model 4110/8110 Four and Eight Channel Precision Microphone Preamplifiers Universal Audio Manual Number 65-1001 Revision 1.
The 4110 and 8110 Preamps Thank you for choosing the Universal Audio Precision Microphone Preamplifier The X110 series is based on the discrete class A analog technology from Universal Audio’s award winning 2192 converters. Fidelity The X110 series preamps offer totally transparent, crystal clear natural fidelity as well as flexible control over the input impedance and transformer saturation resulting in increased flexibility making it a great choice for a wide variety of applications.
• Dual impedance input transformer • Separate Gain and Level controls for maximum signal to noise control and flexibility • Multi-segment LED bar graph output metering on each channel • Separate 3 stage input status LED on each channel • Pad, Phase, Low Cut and +48 V all with separate backlit switches • Line level inputs on every channel • Rugged 3U rack mount chassis In addition to the 4110 & 8110 Preamps, Universal Audio has released reproductions of the classic Teletronix LA-2A Leveling Amp
IMPORTANT SAFETY INSTRUCTIONS 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. 2. 3. 4. 5. 6. 7. 8. Water and Moisture – Do not use the unit near any source of water or in excessively moist environments.
Notice This manual provides general information, preparation for use, installation and operating instructions for the Universal Audio 4110 and 8110 preamps. 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. Universal Audio, Inc.
Table Of Contents Specifications..................................................................................................................... 1 Operating Instructions........................................................................................................ 3 Front Panel ............................................................................................................... 3 Rotary Controls .........................................................................................
4110 / 8110 Performance Specifications Mic Input Impedance………………………………………………………………....500 ohms, 2k ohms Balanced Line Input Impedance……………………………………………………………….6.5k ohms Instrument Input Impedance………………………………………………………..47k ohms, 2.2M ohms Max Mic Input Level, No Pad………………………………………………..…+3 dBu, 0.1% THD+N Ratio Max Mic Input Level With Pad………………………………………...………+14 dBu, 0.1% THD+N Ratio Max Instrument Input Level…………………………………………………..+25 dBu, 0.1% THD+N Ratio Max Output Level into 600 ohms……………………………………………..
Output Meter Reference Levels Red…………………………………………….…………………………...………..+10 dBu Yellow………………………………………………………………………...……….+4 dBu Green (upper)……………………………………………………………….…………..-2 dBu Green (lower)…………………………………………………………………………..-10 dBu Input Meter Reference Levels Red………………………………………………………..………1.0% THD+N Ratio (40V pk-pk at JP1) Orange………………………………………………………………2% THD+N Ratio (20V pk-pk at JP1) Green…………………………………………………………….0.07% THD+N Ratio (12V pk-pk at JP1) General Power Requirements…………………………………………………………..
Preamp Operating Instructions The 4110 and the 8110 have exactly the same circuits. The front panel controls are the same and the following operating instructions apply to either product with one exception; the 4110 provides Hi-Z instrument inputs on all four channels. The 8110 does not provide Hi-Z instrument inputs. 4110 Front Panel 1 5 4 HI-Z INPUTS 2 6 3 1 1 LEVEL 2 1 4 SHAPE INPUT 2 5 OFF 6 3 7 1 7 1 10 LINE 500 2.0M 6 1 500 MIC 2.0K 2.
4110 & 8110 Front Panel Channel Blocks 4 5 4 8 6 3 7 2 8 1 7 1 9 8 10 0 LEVEL 10 LEVEL OUTPUT SHAPE OFF 4 1 OFF 6 3 4 7 2 8 1 500 6 7 1 9 8 10 LINE INPUT 2 5 3 0 GAIN MIC 2.0K 1 2 9 0 OUTPUT SHAPE INPUT 2 5 6 3 2 9 0 5 4 10 GAIN HI-Z 47K MIC 2.0K 2.
mic preamps, keyboards, sound modules and drum machines or any device with a line level output. The 4110/8110 may be used as a “tone box” in this configuration, offering a variety of sonic colors based on the front panel control settings. • Hi-Z: Selects the signal from the front panel (4110 only), unbalanced Hi-Z 1/4”connector. This input can have an input impedance of 47K Ω or 2.2MΩ and is intended for bass, guitar or any instrument with a magnetic or acoustic transducer pickup.
Function Switches (backlit push buttons) Polarity The Polarity switch is the top switch in the column of four round push buttons located on the lower right side of the channel block. The polarity switch will light up when enabled and is labeled with the symbol: “∅”. When off, pin 2 of the LINE OUTPUT is hot (positive). When the switch is enabled, pin 3 is hot (positive). Normally the switch should be off and only enabled when it is desirable to reverse the polarity of the Line Output signal.
SHAPE Control Switch The SHAPE control is a three position mini toggle switch located just below the top rotary knob on the left side of the channel block. NOTE: Only SHAPE position 2 has effect on the 4110 Instrument Input as the input transformer is only used for Mic & Line inputs. Position OFF This position selects the purest signal path, and is called the Modern position; Clean, clear, full bandwidth that is distortion free.
4110 / 8110 Rear Panels On the left, AC Power input receptacle. On the right, the MIC INPUT, LINE INPUT, and LINE OUTPUT XLR connectors. These connectors are discussed in the following sections. 4 3 2 1 MIC IN MIC IN LINE IN LINE IN POWER IN: 100-240V 50/60Hz FUSE RATING: T 4A 250V REPLACE FUSE WITH SAME RATING AND TYPE ONLY! LINE OUT LINE OUT 4 3 2 UNIVERSAL AUDIO, INC SANTA CRUZ, CALIF. - U.S.A.
Voltage Select The 4110 / 8110 contains a universal auto-sensing, filtered, multi-stage regulated power supply, which supports 100-240VAC and 50-60Hz power for trouble-free operation worldwide. No switch setting is required when changing from 115 to 230 volt use or vice versa.
Historical Notes Bill Putnam was awarded the 2000 Technical Grammy for his multiple contributions to the recording industry. He was highly regarded as a recording engineer, studio designer/operator and inventor. Putnam was considered a favorite of musical icons including Frank Sinatra, Nat King Cole, Ray Charles, Duke Ellington, Ella Fitzgerald and many, many more.
Legendary engineer Wally Heider, manager of remote recording at United, used his 610 console to record many live recordings including Peter, Paul and Mary “In Concert” (1964), Wes Montgomery’s “Full House” (1962), and all of the Smothers Brothers Live albums. Heider’s console was later acquired by Paul McManus in 1987, who spent a decade restoring it. [We thank Paul for his efforts and his contribution to our efforts to trace the history of the 610.] At least one 610 module is still in use at Ocean Way.
The output stage of the 1176 is a carefully crafted class A line level amplifier, designed to work with the (then) standard load of 600Ω. The heart of this stage is the output transformer, whose design and performance is critical. Its primary function is to convert the unbalanced nature of the 1176 circuit to a balanced line output, and to provide the proper impedance matching to drive the line impedance of 600Ω.
