Samson MPL 1502 Specifikace stáhnout pdf (Strana 17)

Setting the Correct Gain Structure

j. The procedure for setting optimum microphone levels is virtually identical; sing

or speak into the mic at the level you expect to use in performance while slowly

raising the gain control for that channel to its center detented “0” position. Then

carefully adjust the input trim control for that channel while watching the meter,

until the “0” segment lights frequently and the “+2” segment lights only occasion-

ally. You should expect that microphone inputs will require rather more in the

way of input trim boost than line inputs.

k. If you have any outboard signal processors connected to the Aux send and

return jacks on the rear panel, follow this step. Because outboard effects

processors can sometimes be quite noisy, it’s particularly important to maximize

the amount of signal being sent to them via the MPL 1502 Aux sends. The idea

is to drive these devices as hot as possible (short of overloading them) and then

to use the corresponding Aux return level to carefully adjust the amount of

processed signal being blended with the dry signal. To set optimum Aux send

levels, use a channel that has already had its gain structure adjusted in step (g)

or (j) above. Turn both Aux send knobs for that channel to their “0” (unity gain)

position and then play the instrument (or sing into the microphone) connected to

that channel. Adjust the input levels of connected outboard effects processors

so that their meter shows incoming signal normally in the 0 vu range (with only

occasional higher excursions). Then it’s time to optimize the Aux return levels.

While continuing to play your instrument (or continuing to sing into the micro-

phone), slowly raise each Aux return level control until you hear the desired

amount of processed signal added to the dry signal. For more information, see

the “Using the Aux Sends and Returns” section on page 20.

l. The gain structure is now correctly set—you’ve optimized the level of all

signals coming into and out of the MPL 1502, and the end result will be minimum

noise and distortion and maximum clean sound. You’ll now find that the majority

of your mixes can be accomplished with most channel gain controls at or near

their center detented “0” (unity gain) position and that the channel peak LEDs

rarely if ever light (remember, if they do light, it means that something is

distorting!). If you need to make adjustments to the overall level, use the level

control of your power amplifier.

If you encounter difficulty with any aspect of setting up or using your MPL 1502,

you can call Samson Technical Support (516-932-1062) between 9 AM and 5

PM EST.

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Samson MPL 1502 Specifikace Strana 17