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The Alesis M1 Active 520 is a newly designed, affordable, high-precision active reference monitor with Bass Density control and EQ. The M1 Active series offers incredible definition and flat frequency response from the high-precision drivers and a professionally crafted crossover.

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5 in. low frequency woofer for clear bass and midrange
1 in. silk dome tweeter for clear highs without ear-fatiguing harshness
High-precision drivers offer lower distortion and smoother frequency response
Acoustical waveguide for superior imaging with minimal diffraction
1 in. thick front baffle virtually eliminates speaker resonance
Magnetically shielded for close placement to video monitors in computer based music production studios
1/4 in. TRS connector with volume control
Low Frequency Density Switch for acoustic space adjustment of the monitors
Rear port design provides deep bass extension and increased SPL
Hi, Mid, and Low Frequency EQ switches to accommodate user preference and sub-woofers
Top mounted, integrated Power Switch/Clip Light Bar


Bi-amplified Design / Tweeter - 25W, woofer - 50W
Woofer. 5" lightweight, magnetically-shielded, ultra-stiff polypropylene cone with rubber surround and high power handling voice coil.
Tweeter. 3/4" silk dome with magnetic shielding.
Frequency Response. 56 Hz - 20 kHz
Crossover Frequency. 2.8 kHz
Signal-to-Noise Ratio. >100 dB below full output, unweighted.
Inputs. XLR and 1/4" supporting both balanced and unbalanced cabling.
Polarity. Positive signal on "+" pin creates forward cone displacement.
Input Impedance. 20k ohms balanced or 10k ohms unbalanced.
Input Sensitivity. 85 mV noise (pink) produces 90 dB(A) output SPL at 1 meter. Gain knob turned fully clockwise (maximum).
Dimensions (W x H x D). 6.5" x 10.5" x 7.75" 
Net Weight (each speaker). 13.0 lbs

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