Crate Live Sound LS1-131 Скачать руководство пользователя

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User’s Guide

for the

Constant Q Graphic Equalizers

Crate Pro Audio’s Live Sound Graphic Equalizers feature constant Q circuits which, unlike inferior broad band EQs, let

you boost or cut only the frequencies you choose. Combined with a switchable equalization range, these EQs allow greater
system control and accuracy whether using them for house coloration, feedback control, or speaker correction.

In order to achieve the highest level of performance from your equalizer, please read this owners guide prior to its use.

“Thank You” from

LS1-131

LS3-231

LS2-215

Содержание Live Sound LS1-131

Страница 1: ...st or cut only the frequencies you choose Combined with a switchable equalization range these EQs allow greater system control and accuracy whether using them for house coloration feedback control or speaker correction In order to achieve the highest level of performance from your equalizer please read this owners guide prior to its use Thank You from LS1 131 LS3 231 LS2 215 ...

Страница 2: ...WER OUTLET WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE CAUTION NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL IT IS NECESSARY FOR THE USER TO REFER TO THE INSTRUCTION MANUAL REFERREZ VOUS AU MANUAL D UTILISATION UNBEDINGT IN DER BEDIENUNGSANLEITUNG NACHSCHLAGEN EXPLANATION OF GRAPHICAL SYMBOLS DANGEROUS VOLT...

Страница 3: ...lanced inputs and outputs Constant Q bandpass filter sets for precision control Two control ranges for greater accuracy Hardwire switchable bypass from input jacks to output jacks for total elimination of the equalizer from the system Peak LEDs to obtain optimal signal levels High signal to noise ratio greater than 94dB and a wide frequency response 20Hz to 20kHz Flat phase response for accurate r...

Страница 4: ...fect As your ear passes across the stereo plane of your system the comb filter effect sounds like peaks and nulls in the response which can change the imaging dramatically 4 LS1 131 LS2 215 LS3 231 Constant Q Graphic Equalizers Figure 2 Q vs Ringing 1kHz TONE BURST INPUT SIGNAL STOP INPUT SIGNAL START 1kHz TONE BURST INPUT SIGNAL STOP INPUT SIGNAL START Figure 3 Phase Response PHASE Degrees 180 15...

Страница 5: ...ntrol to 30Hz and add a 12dB octave roll off at that frequency This will result in a noticeably cleaner sound Figure 4a shows the rolloff curves for this control at the frequencies shown on the front panel The High Cut control can be used to reduce high frequency noise in your source material instruments recorded music etc and can help achieve a more natural sound when reproducing some acoustic in...

Страница 6: ...e filter is continuously variable from 3kHz to 40kHz with a rolloff of 12dB octave 8 LEVEL Use this control to adjust the input signal level For the best signal to noise ratio set this control so the PEAK LED 5 flashes on strong peak level signals The overall output signal level of the equalizer is determined by the setting of this control and the EQ sliders 2 9 BALANCED INPUTS The mixing board am...

Страница 7: ...S The mixing board amplifier or instrument source may be connected to the equalizer using either of these jacks However only one jack may be used at a time Different methods of connection are described and illustrated on pages 9 and 10 8 BALANCED UNBALANCED OUTPUTS The equalizer may be connected to the mixing board or amplifier using either of these jacks The 1 4 phone jack and the XLR jack are ba...

Страница 8: ... range at which the human ear is most sensitive Very small changes in this area can produce a dramatic effect This region is most commonly reduced in amplitude to produce a rich sound with more emphasis on low bass and upper high end regions When equalizing indi vidual instruments in a mix this range becomes very important to bring them to the front of the mix cutting through the rest of the instr...

Страница 9: ...ction figure 7 below or in line between a mixer and an amplifier figure 8 following page Your dealer can assist you in choosing the connection which is best suited for your particular needs 9 LS1 131 LS2 215 LS3 231 Constant Q Graphic Equalizers Figure 6 In Line with Signal Source SOURCE EQUALIZER Source connects to BALANCED INPUT jack of equalizer BALANCED OUTPUT jack of equalizer connects to INP...

Страница 10: ...will begin to feed back Pull down on the corresponding slider again Repeat this procedure three or four times only After that go to the sliders you have not yet moved and bring up their level until that frequency begins to feedback then pull the slider down until the feedback just stops Continue this procedure with each slider This method takes a lot of practice and patience but it will adjust the...

Страница 11: ...lables for greater clarity and distinction The vocal range is from about 150Hz up to 4kHz When speech intelligibility is your main concern this frequency range is critical Emphasis is typically greater around 4kHz particularly in a highly reverber ant environment Using your equalizer with a digital reverb gives you the ability to change the characteristics of the room or hall you ve selected offer...

Страница 12: ...2k 2 5k 3 15k 4k 5k 6 3k 8k 10k 12 5k 16k 20k LS2 215 25 40 63 100 160 250 400 630 1k 1 6k 2 5k 4k 6 3k 10k 16k Control Range 6dB or 12dB switchable Frequency Response 20Hz 20kHz 0 5dB flat settings Total Harmonic Distortion Less than 0 01 20Hz 40kHz 10dBu Signal to Noise Ratio 94dB 20kHz noise bandwidth Gain flat settings LS1 131 LS2 231 12dB LS3 231 to 12dB Maximum Input Level 22dBm Level contro...

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