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Speaker
Installation
I / 4" jacks; you may use a TRFIo-TRS balanced phone cable, or an XLR-to-l/4 inch
phone TRS (tip-ring-sleeve) cable, as shown below. The advantage of using an XLR
on the speaker side is that it is a locking connector and cannotbe accidentally
dironnected.
NOTE: Use high quality input connectors which conform to industry standard sleeve
dimensions. Some off-brand corurectors, particularly cheap 1/4" TRS plugs, do not
provide reliable connections because of slight dimensional differences.
Seliling the lnput Leuel control
The goal is to set the input level of the Ml Actives for the desired listening level,
when all the rest of the system is at its norrrinal operating level. "Nominal" means its
nomral average level, expecting peaks frorr 8 to 15 dB above that on occasion. For
the best signal-to-noise ratio, everything befme theMl Active should be as loud as
possible. The MLA's INPUT LEVEL control, being last in the signal chain, is the
worst place to make up gain lost earlier in the system.
To set the lewl with a mixer:
1. Tum on all system components (the M1 Actives last) and tum the Ml Active's
INPUT LEVEL control all the way down.
2
PIay program through the mixer and raise the mixe/s fader levels until its meter
averages,uound "0 VU".
3. Raise the Control Room Output to its nonrinal position (usually "2 o'clock" or
3,/4 of the way up).
4
On one speaker, raise its INPUT LEVEL CONTROL for a comfortable level in the
engineer's seat (if you have a sound pressure meter, 85 dB SPL is a cornrnon
standard for listening).
5. Matdr the level for the other speaker. Note that the numbers on the back panel
are only a rough guide; for precise leftlright imaging, use pink nois€ or test
tones and a sotrnd pressure meter.
The Input Level control has a 28 dB range with a center detmt. The detent has no
particular meaning, but helps in adding a mental "reference position" when
attempting to set levels from in front of the speaker. With the control at a maximum
clockwise rotation,2.0 volt input will produce full amplifier output (L02 dB SPL "A"
weighted from two speakers at 1 meter).
A
il}I'ICrT,t
REEHCE
If,ATUAL
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