Pro Audio SourceBook 2007 by B & H Foto & Electronics

More catalogs by B & H Foto & Electronics | Pro Audio SourceBook 2007 | 1519 pages | 2013-06-20

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Page 318 of Pro Audio SourceBook 2007

symetrix 422 stereo agc-leveler processors 323 audio comes in all shapes and sizes there s loud audio there s quiet audio there s pretty audio there s ugly audio there s music there s speech there are cd s mastered at drastically different levels there are movie sound tracks where the effects are too loud and the dialog so soft you can t understand the words have you ever been on an airplane trying to watch the movie and found yourself repeatedly turning the volume up and down up and down well if you need to free yourself from unpredictable audio program levels then you need the 422 stereo agc/leveler with simple and intuitive controls the 422 converts all over the map signal levels into smooth intelligible constant level audio unlike a compressor/limiter which only does half a job it pushes down from the top preventing overload and distortion in subsequent stages but does nothing from the bottom the low level signals that contribute so much to the intelligibility of speech and the enjoyment of music the 422 stereo agc-leveler does it all it makes the loud sounds quieter and the quiet sounds louder and it does it with finesse the 422 works without the side effects of compressors and limiters no noise pumping and modulation features easy to use there are basically only four controls the 422 is a remarkably sophisticated volume controller that is amazingly easy to use ­ the first and most important is the target level control this sets the volume where you want it the 422 s input over output parallel vu meters simultaneously show you the unmodified input signal on top and the result of your target level setting just below it ­ the detector control increases the sensitivity of the agc as you turn it counterclockwise the 422 gently reaches down for the lower volume audio and brings it up ­ set the target level and detector then use the ratio control to increase or decrease the amount of leveling at high ratios the program density increase results in a more present or up front sound at low ratios the 422 performs subtle yet effective automatic gain riding ­ last adjust the peak limit control to create an absolute ceiling level this is very handy for protecting amps and speakers in discos where dj s often succumb to a disease known as volume creep as the night wears on remote bypass port why not just use a compressor/limiter when it comes to maintaining constant output levels a compressor limiter can only do half the job at best sure when things get too loud the comp/limiter kicks in but what about when things get too soft a comp/limiter is a top down device ­pushes down from the top preventing overload and distortion in subsequent stages.but what about the bottom up part of the deal what about the low level signals that contribute so much to the intelligibility of speech and the enjoyment of music the 422 brings the volume to where you want it and keeps it there it can be used in virtually any type of sound system for processing just about any kind of audio insert the 422 at a convenient patch point where you have line level audio there are no annoying -10 +4dbu level matching switches ­ just give the 422 a basic line not mic level signal and you re ready to go input/output inputs outputs polarity input output max input level 1/4 trs and xlr stereo balanced bridging or unbalanced 1/4 trs and xlr stereo balanced or unbalanced tip is high ring is low sleeve is ground tip is high ring is low sleeve is ground +24 dbu thd+noise performance frequency response dynamic range agc detector range ratio target level range limiter threshold limiter ratio 20 hz 20 khz 05 >110 db -40 dbu to +24 dbu 1:1 to 5:1 30 db -15 dbu to +25 dbu >15:1 crosstalk -60 db +20 dbu in 20hz 20khz max output level +22 dbu into 600 ohms order info 212 444-5088 · fax 212 239-7770 800 947-7008 1-800-875-6951 · www.bhphotovideo.com photo video pro audio