Universal-audio LA-610 Channel Strip User Manual

Model LA-610Channel StripUniversal Audio Manual Number 65-0901Revision 1.1Universal Audio, Inc.www.uaudio.com(866) 823-1176 Toll Free(877) 698-2834 To

5T4 Optical Compressor Front Panel (right side)This panel has the Peak Reduction, Gain, Meter Function and Compressor Modecontrols. Each control is di

6Meter CalibrationThe 0dB gain reduction reading may need to be calibrated using the GR Zero Set pot.The GR Zero Set pot is located through a small ho

7Voltage SelectThe LA-610 can operate at 115 V or 230 V. To change the mode, wait 5 minutes afterpower down, unplug the AC power cord from the rear ch

8 -30 -20 -10 0 +10-30 -20 -10 0 +10Input Level (dBB) Output Level (dBB) Compression Expansion Perfect amplifier Figure 4- Input/output characteristic

9As mentioned previously, the compression ratio is defined as the ratio of the increase ofthe level of the input signal to the increase in the level o

10electro-luminescent panel. This signal controls the gain of the compressor. After thegain reduction circuit, the signal is sent through an Output

11photo-cell resistance can not go completely to zero and hence there will always be somesignal present.The T4 electro-optical device is the heart of

12does not control the input level, but rather controls the amountof side chain gain applied to the input signal.Side-Chain CircuitThe previously desc

13console was dismantled. Putnam’s solution was to build a mic-pre with gain control, echosend and adjustable EQ on one modular chassis using a printe

14in response to the input signal level. A compressor/limiter "rides gain" like a recordingengineer does by hand with the fader of a conso

iiThe LA-610 Channel StripThank you for purchasing the LA-610 Channel Strip. This unit combines a modifiedchannel of our 2-610 Mic Pre with an LA2A st

15The LA-2AThe LA-2A leveling amplifier, a tube unit with hand wired components and three simplecontrols, was introduced in the mid 1960s. It utilized

iiiIMPORTANT SAFETY INSTRUCTIONSBefore using this unit, be sure to carefully read the applicable items of these operating instructions and thesafety s

ivNoticeThis manual provides general information, preparation for use, installation and operatinginstructions for the Universal Audio LA-610 Channel S

vTable Of ContentsLA-610 Specifications...1LA-610 Operating Instructi

1LA-610 SpecificationsMicrophone Input Impedance Selectable, 500  or 2k Balanced Line Input Impedance 20k Hi-Z Input Impedance Selectable, 2.2M  o

2LA-610 Operating InstructionsThe LA-610 is a vacuum-tube microphone/instrument/line preamplifier with basic EQand an optical program dependent compre

3level output, such as keyboards, sound modules and drum machines. The LA-610may be used as a “tone box” in this configuration, offering a variety of

4• Frequency: This toggle switch selects the corner frequency (Hz). High: 4.5K, 7K,10K; Low: 70, 100, 200• Boost/Cut: This rotary switch selects the