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The MX-508 is an eight-input stereo rackmountable mixer. Designed for a multitude of applications, the MX-508 has an extensive mix of features for a small unit combined with excellent sound and quiet performance.
The MX-508 features 84 dB of gain to ensure full output with low-level or distant microphones. Several years of research went into the microphone preamp and the result is a discrete circuit with better than -129 dBu Equivalent Input Noise (EIN) and very low distortion. Low and High Shelving EQ combined with mid-band peaking EQ tunable from 140Hz and 8 kHz make for a very flexible tone control. Phantom power of +48 VDC is provided for condenser microphones via a switch on the front panel. Precision input transformers are easily field-installable, and each input has its own 20dB pad switch. Variable gain trim and Mic/Line selection switches are also found on each input channel. Rounding out the list of standard input features are a Peak Clip indicator, two Aux Sends (factory-set with one pre-EQ and level and the other post-EQ and level, these sends may be modified by a qualified technician), In/Out channel patching, Level and Pan controls, and both balanced XLR Microphone and TRS Line inputs.
Transformer-balanced Left and Right XLR outputs are standard, as are balanced Left and Right TRS 1/4" outs. There is also an independent Mono output with its own front panel level control, as well as a selectable Headphone output with Level Control. There are Pre-Master Sub In/Out patch points for linking other mixers, such as the Ashly MX-206 six-input microphone mixer. Peak Clip indicators are also provided for the Outputs, and the 10-Segment LED Meters may be selected to monitor either Program Left and Right or Aux 1 and 2. Maximum output level is +24dB into 600 ohms.
The MX-508 also has two Master Aux Sends and two panable Master Aux Returns (one stereo and the other mono). There is an additional stereo RCA Tape/CD Input< with level control to the Mains or Aux 1. Stereo RCA Tape Outputs are also provided. The MX-508 combines traditional Ashly quality with internally modular construction in a package offering outstanding value and reliability. As with all Ashly products, the MX-508 is backed by the Company's exclusive Five Year Worry-Free Warranty.
Universal switching power supply; operates from 100 - 240VAC, 50/60Hz.
Outputs are now servo-balanced.
Power switch moved to the rear panel.
Panel color has changed from gray to charcoal.
Inside rack depth is eight inches.
Power LED is blue.
THD at +4 dBu, 20Hz-20KHz <0.05%
THD at +20dBu, 30Hz-10KHz <0.05%
IMD (SMPTE) at +20dBu <0.05%
HUM & NOISE (20Hz-20KHz at max preamp gain)
Equivalent input hum and noise <-127dBu
Residual output noise, all levels at minimum <-100dBu
Master Level and one Ch. Level at nom <-80dBu
Aux 1 or 2 Out, Aux Master and one Ch. Aux at nom . <-80dBu
MAXIMUM VOLTAGE GAIN (+/-2dB)
Mic Input to Master Output, 600 ohm load 84dB
Line Input to Master Output, 600 ohm load 42dB
Mic Input to Aux Master Output, pre ch. level 76dB
Mic Input to Aux Master 2 Output, post ch. level 92dB
SUB Input to Master Output 12dB
AUX RETURNS 1 or 2 to Master Output 30dB
TAPE/CD In to Master Output 34dB
Low +/-12dB at 70Hz, shelving
Mid +/-12dB peaking, 140Hz-8KHz
High . +/-12dB at 15KHz, shelving
Adjacent inputs, 20Hz-20KHz <-65dB
Mic Input to Master Output, 1KHz <-65dB
Mic Input to Master Output, 20KHz <-55dB
VU METERS (Selectable to Main or Aux Outputs) 0VU = +4dBu
PEAK INDICATORS Indicator on Inputs, L & R outputs, lights 3dB below clipping
(+48 VDC applied to all Mic Inputs, switchable on front panel)
Maximum total current draw = 80mA.
Maximum single channel current draw = 14mA.
Gradual power-up and down to eliminate "pops".
SHIPPING WEIGHT 20 lbs. maximum with 8 input transformer options installed
POWER REQUIREMENTS 100-240 VAC, 50-60 Hz, 35 watts
19" wide x 5.25" high x 8.0" deep.
The unit shall be an eight input stereo mixer having separate transformer- isolated balanced outputs for both left and right channels. There shall be an electronically balanced mono-summed output with separate front panel level control.
Each input channel shall have level and stereobalance controls on one concentric pot. Two aux sends on each channel must be provided with one internally wired pre-fader EQ and the other post fader/EQ. The Pre/Post determination of the Aux sends shall be configurable via circuit board jumper connections. Each input channel shall have three-band equalization control with adjustable mid-band frequency sweep. The equalization shall consist of high and low shelving points being fixed at 70Hz and 15kHz, and the mid-band peaking EQ control must be adjustable between 140Hz and 8kHz.
Each input channel shall have 40 dB of available attenuation and a switch for mic/line selection on the front panel, as well as a 20 dB microphone input pad on the back of the unit. Each input channel shall have in/out insert points on separate 1/4. phone connections, 1/4. phone connectors for balanced line input sources, and XLR electronically-balanced connectors for microphones (each input channel shall additionally have the option of internal plug-in transformers).
Phantom power of +48VDC on each input must be available via a front panel switch. There shall be two Master Aux Sends provided and two panable Master Aux Returns (one stereo and one mono). There shall be an additional stereo CD/Tape input on RCA jacks with level control to the Mains or Aux 1. Separate stereo RCA tape outputs must also be provided. There shall be Pre-Master Sub In/Out patch points for left and right and Aux Sub outputs on 1/4. phone jacks for linking other mixers. A selectable Headphone output with level control to monitor either Left and Right or Aux 1 and 2 must be provided on the front panel.
Overall gain available from Mic Input to Master Output shall be 84 dB, and the Output level shall be +24dBm into 600 ohms. The mixer unit shall be no higher than three rack spaces and must be fully covered under a five year warranty. The mixer must be manufactured in America, with a shipping weight of 15 pounds.
The mixer shall be the model MX-508, manufactured by Ashly Audio, Inc. No other unit shall be acceptable unless data submitted from an independent test laboratory verifies that the above size/performance specifications are met.
With over a thirty year history, Ashly Audio Inc. is recognized as a world leader in the design and manufacturing of quality signal processing equipment and power amplification for use in the commercial sound contracting and professional audio markets. Our philosophy established from the very beginning is to offer only the highest quality audio products to the professional user.
Ashly warrants its products to be free from defects for 1 year from the date of purchase.
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