Product Description Nearfield Studio Monitors with USB Audio I/O Amazon.com Designed for professional studio use combined with a stereo USB audio interface, the M1Active 520 USB studio monitor covers nearly all frequencies audible to human ears--from 20,000 Hz all the way down to 56 Hz

And with its USB capabilities, you can take USB digital signal out of your computer and input it to M1Active 520 USB for low-noise, low-distortion performance

This package includes a pair of M1Active 520 USB monitors

The pair of M1Active 520 USB studio monitor (also see a larger schematic of the rear connections and controls)

The M1Active 520USB around a 5-inch polypropylene low-frequency driver for full, smooth response in the low end and a 1-inch silk dome high-frequency driver for absolute clarity in the highs

Alesis' custom crossover avoids the crucial vocal midrange, ensuring that your mixes sound the way you recorded them

The low-resonance bass reflex cabinet features radiussed edges to reduce edge diffraction and a tuned port for bass extension

A bass boost switch offers low-frequency enhancement to further accommodate for room conditions requiring a little more output in the low end

The M1Active 520 USB feature a large, front-panel, bi-color indicator that indicates presence of signal in blue and clipping in red for instant feedback on system status

The front-panel stereo 1/4-inch headphone output mutes the loudspeakers when connected

Key Features Two-way, active, bi-amplified pair of reference studio-monitor loudspeakers Wide, 56 - 20,000 Hz frequency response 60W system with 30W per speaker Five-inch lightweight polypropylene woofer One-inch silk-dome tweeter Integrated USB audio interface with 16-bit, 44.1/48 kHz recording and playback Two balanced-1/4-inch inputs Stereo, 1/4-inch headphone output Magnetically shielded for placement near TV and computer monitors Low-resonance cabinet with tuned bass port Bi-color signal/clip indicator Switchable power supply ensures worldwide operation USB Digital Audio Interface In addition to their capabilities as traditional monitor loudspeakers, M1Active 520 USB monitors contain a USB audio interface

Connected audio sources such as mic preamps and instruments can be recorded directly into your computer at 16-bit, 44.1 or 48 kHz

Simply plug the USB cable into your computer--no special drivers required

And when it's time to listen back to your mixes, that same USB cable sends 16-bit, 44.1 or 48 kHz, stereo audio from computer to your M1Active 520 USBs

What's in the Box Two M1Active 520 USB loudspeakers, XLR connection cable (6-foot), USB cable (6-foot), power cable, quick start guide Specifications Low-frequency driver: 5-inch lightweight, magnetically-shielded, ultra-stiff polypropylene cone with rubber surround and high power handling voice coil High-frequency driver: 1-inch silk dome with magnetic shielding Frequency Response: 56 - 20,000 Hz Power: 30W per channel RMS Signal-to-Noise Ratio: >90dB weighted Digital Conversion: 16-bit delta sigma, 44.1kHz or 48kHz sampling rate Inputs: Two balanced-1/4-inch Polarity: Positive signal on "+" pin creates forward cone displacement Input Impedance: 10k ohms Input Level: -10dBV nominal, balanced Dynamic Range: >80dB