Ashly MX-508 Quick start guide

MX-508
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 stereo-balance 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 con-
figurable via circuit board jumper connections.
Each input channel shall have three-band equalization con-
trol with adjustable mid-band frequency sweep. The equaliza-
tion 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 40dB of available attenuation and a switch for mic/line
selection on the front panel, as well as a 20dB mic input pad on
the rear panel. 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 con-
nectors 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 avail-
able from Mic Input to Master Output shall be 84dB, 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 cov-
ered under a five year warranty. The mixer must be manufac-
tured in America, with a shipping weight of 20 pounds.
The mixer shall be the model MX-508, manufactured by Ashly
Audio, Inc. No other unit shall be acceptable unless data submit-
ted from an independent test laboratory verifies that the above
size/performance specifications are met.
Features:
• 3-Band Channel EQ w/ Sweepable
Mid Frequency Center
• +48V Phantom Power
• High gain (84dB Channel Input to
• Program Output) Ensures Full
Output with Low Level or Distant
Mics
• Transformer Isolated +24dBm 600
ohm
• Balanced XLR Stereo Program
Outputs w/Left and Right Master
Controls and Mute Switching
• Insert Jacks on Each Channel
• Optional Precision Input
Transformers
• Independent Mono Output w/Level
Control
• 2 Aux Sends per Channel
• 2 Master Aux Sends
• 2 Master Aux Returns
• (1-Stereo & 1-Mono, both Panable)
• Five Year Worry-Free Warranty
• Safety/Compliance: cTUVus/CE, RoHS
Technical Notes & Specifications
MX-508 Eight Input Stereo Mic/Line Mixer
Architects Specications

Ashly manufactures a complete and comprehensive line of Analog and Digital Signal Processors, Power Amplifiers, Mixers, and
Amplifier Input Options. Please call, write or visit our web site for information on any of these Ashly Products.
Specifications MX-508
TOTAL HARMONIC DISTORTION:
< 0.05 % @ +4 dBu, 20 Hz-20 KHz.
< 0.05 % @ +20 dBu, 30 Hz-10 KHz.
INTERMODULATION DISTORTION (SMPTE IM distortion):
< 0.05 % @ +20 dBu.
HUM & NOISE (20 Hz-20 KHz noise bandwidth):
< -127 dBu equivalent input hum and noise
< -100 dBu residual output noise; TRS outputs, all level controls at min.
< -80 dBu MASTER LEVEL and one CH. LEVEL at nom.
< -80 dBu AUX 1 or 2 OUT; AUX MASTER and one CH. AUX at nom.
MAXIMUM VOLTAGE GAIN:
MASTER
84 ± 2dB—MIC INPUT to MASTER OUTPUT, 600 ohm load.
42 ± 2dB—LINE INPUT to MASTER OUTPUT, 600 ohm load.
AUX SENDS
76 ± 2dB—MIC INPUT to AUX MASTER 1 OUT, pre ch. level.
92 ± 2dB—MIC INPUT to AUX MASTER 2 OUT, post ch. level.
SUB INS
12 ± 1dB—SUB INPUT to MASTER OUTPUT.
AUX RETURNS
30 ± 2dB—RETURN 1 or RETURN 2 to MASTER OUTPUT.
TAPE/CD IN
34 ± 2dB—TAPE/CD INPUT to MASTER OUTPUT.
FREQUENCY RESPONSE:
+0.5/-1.0 dB 20 Hz to 20 KHz.
EQUALIZATION:
LOW ± 12dB at 70 Hz, shelving.
MID ± 12dB peaking, 140 Hz-8KHz.
HIGH ± 12dB at 15 KHz, shelving.
CROSSTALK:
< -65 dB, adjacent inputs, 20 Hz-20 KHz.
< -65 dB, MIC INPUT to MASTER OUTPUT at 1 KHz.
VU METERS:
Two 10-segment LED meters, L/R MASTER or SEND 1/2 selectable. 0 VU = + 4 dBu.
PEAK INDICATORS:
Peak CLIP indicator on each input channel and left and right outputs,
illuminates 3 dB below clipping.
PHANTOM POWER:
+ 48 VDC applied to all MIC INPUTS, switchable on front panel.
80mA maximum total current draw
14ma maximum single channel current draw
Gradual power-up and down to eliminate “pops.”
DIMENSIONS:
19” wide x 5.25” high x 8.0” deep.
SHIPPING WEIGHT:
20 lbs.
POWER REQUIREMENTS:
100 - 240VAC, 50-60 Hz
Input Specifications:
INPUT BALANCED/ INPUT LEVEL LOAD FOR USE WITH SENSITIVITY MAX. INPUT LEVEL CONNECTOR
UNBALANCED & PAD IMPEDANCE NOMINAL BEFORE CLIP
MIC INPUTS Balanced, Input level @ -60, pad out > 1 K ohm 50 ohm to 600 ohm mics -80 dBu -42 dBu Female XLR
(1-8) transformer optional Input level @ -20, pad out -40 dBu 0 dBu
Input level @ -20, pad in -20 dBu +20 dBu
LINE INPUTS Balanced Input level @ -24 > 10 K ohm 600 ohm lines -38 dBu -2 dBu 1/4” TRS
(1-8) Input level @ +22 NA +24 dBu Phone Jack
AUX Unbalanced NA > 10 K ohm 600 ohm lines -26 dBu +24 dBu Ret 1 1/4”
RETURNS (1,2) +22 dBu Ret 2 Phone Jack
SUB INPUTS Unbalanced NA > 10 K ohm 600 ohm lines -8 dBu +24 dBu 1/4”
(L,R, AUX 1,2) Phone Jack
TAPE/CD IN Unbalanced NA > 10 K ohm 600 ohm lines -30 dBu +15 dBu RCA Jacks
Output Specifications:
OUTPUT BALANCED/ SOURCE IMPEDANCE FOR USE WITH OUTPUT LEVEL CONNECTOR
UNBALANCED NOMINAL NOMINAL MAX BEFORE CLIP
MASTER OUT (L,R) Transformer Balanced < 200 ohm > 600 ohm lines +4 dBu +24 dBu Male XLR
MASTER OUT(L,R) Servo-balanced < 200 ohm 10 K ohm lines +4 dBu +23 dBu 1/4” TRS Phone Jack
MONO OUT,
AUX OUT (1,2)
SUB OUT (L,R) Quasi-balanced < 200 ohm 10 K ohm lines +4 dBu +23 dBu 1/4” Phone Jack
SUB OUT (AUX 1,2) Unbalanced < 680 ohm 10 K ohm lines +4 dBu +23 dBu 1/4” TRS Phone Jack
TAPE OUT (L,R) Unbalanced < 680 ohm 10 K ohm lines +4 dBu +12 dBu RCA Phono Jack
Notes:1. 0 dBu = .775 Vrms. 2. Sensitivity is input signal level which will produce +4 dBu out with all levels maximum.
Unless otherwise noted, specification conditions are: 150 ohm source, INPUT LEVEL set at “-60”, all other controls set at nominal, XLR outputs into 600 ohms or greater.
Ashly Audio Inc., 847 Holt Road, Webster, NY 14580-9103
Toll Free [phone], Tel: [phone], Fax: [phone]
www.ashly.com, e-mail: [e-mail]