User Guide
Introduction EX66 Features Congratulations on your purchase of M-Audio’s EX66 reference monitor. Recording engineers and music producers around the world rely on M-Audio reference monitors to ensure their mixes are accurate. The EX series active monitors from M-Audio improve upon that reputation as a top-of-the-line solution for the most demanding applications. Engineered to the highest sonic standards, the new EX66 monitor addresses the needs of the most critical professional users.
What’s with the Two Silver Woofers? � The EX66 uses a midwoofer-tweeter-midwoofer (MTM) vertical array configuration to provide an extraordinarily versatile sound radiation pattern (degrees of arc for the sound wave, vertically and horizontally). Consider the following: conventional 2-way speakers in a stereo setup require that you listen to them in a fairly narrow “sweet spot” (where you position yourself at the apex of an isosceles triangle with the speakers).
Setting up your EX66 Monitors They’re only speakers, so how hard can it be... right? Depending on your experience with vertical array speakers, it may not be that simple. The following section can give you useful information on how to get the best acoustic response out of your EX66 monitoring setup. Important - The EX66 works best in the vertical position. If you place the speaker horizontally, you will lose many of the benefits of the MTM design and the sound image will deteriorate.
Finally, because of the EX66’s wide horizontal radiation pattern, you do not need to “toe in” the speakers. Having the speakers point straight, rather than turned in toward the listener, should provide the proper ratio of center-fill to soundstage width. The XLR and 1⁄4” TRS inputs are summed, so you can use both inputs at the same time. Important - If you’re using an XLR plug, make sure you feed it into the “XLR” � input in the “Analog” portion of the EX66 rear panel—and NOT the AES/EBU input.
If you’re using a digital source with a S/PDIF interface, you can feed it directly into the S/PDIF input � on the back of one of your EX66 monitors using a high-quality 75Ω S/PDIF cable. You must set the Input Select switch �� to either S/PDIF L or S/PDIF R depending on whether that speaker will be reproducing the left or right half of the digital bitstream.
Did You Know? 6 » EX66 User Guide
Protection Circuits In order to safeguard your EX66 from accidental damage, we’ve built in some protection mechanisms. Overload Protection The EX66 can react to two types of electrical issues: “over-current” and “over-voltage.” In the case of the former, when the system is driven so hard that it approaches the upper limit of the drivers’ piston range, the output waveform will soft clip (at 11 amps) in order to protect the drivers.
Appendix - Technical Specifications Type: MTM studio reference monitor LF Driver: two 6-inch woofers HF Driver: 1-inch titanium dome tweeter with wave guide Frequency Response: 37Hz to 22kHz, near-field acoustic response, (flatness of ±1dB from 50Hz to 19kHz) Crossover: 2.56kHz 4th-order Linkwitz-Riley maximally flat alignment LF Amplifier Power: 104 watts (IHF dynamic power into 4 Ω) HF Amplifier Power: 104 watts (IHF dynamic power into 4 Ω) THD+N: <0.
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