MX-508 Stereo Microphone/Line Mixer Operating Manual ASHLY AUDIO INC. 847 Holt Road Webster, NY 14580-9103 Phone: (716) 872-0010 Toll-Free: (800) 828-6308 Fax: (716) 872-0739 Internet: http://www.ashly.
Operating Manual -MX-508 Stereo Microphone/Line Mixer Table Of Contents 1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 UNPACKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3 AC POWER REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 4 CONTROLS . . . . . . . . . . . . . . . . . . . . . . . .
Operating Manual - MX-508 Stereo Microphone/Line Mixer 1. INTRODUCTION 2. UNPACKING Congratulations on your purchase of an Ashly MX-508 stereo mixer. In one compact rack-mount package we have combined features, reliability, and sonic performance previously found only in larger and more expensive mixing consoles. This second generation mixer is similar to the MM-508, with the addition of output mute switches on stereo outputs and double or single jack insert points on all input channels.
Operating Manual -MX-508 Stereo Microphone/Line Mixer 4. CONTROLS -40 0 - -30 Input Level -50 +22 -20 -60 -24 dB Ch.1 M L Clip 4.2 Mic-Line Switch This switch selects between the XLR microphone input or the 1/4" line input jack as the signal source. It can also serve as a "channel mute" switch when selected to the unused input. High EQ -12 630 Mid EQ Frequency -12 +12 1.2K 2.5K 5K +12 Low EQ -12 4.
Operating Manual - MX-508 Stereo Microphone/Line Mixer 4.10 Output Meters A pair of peak reading 10 segment LED meters are used to indicate output level. Green LED's are used below 0 VU, yellow above 0 VU and red LED's indicate clipping. 0 VU is equivalent to +4 dBu (1.228Vrms). This meter pair is switchable (with the headphone output) to either the Main Left and Right outputs or the Aux 1 and 2 outputs.
Operating Manual -MX-508 Stereo Microphone/Line Mixer 5. CONNECTIONS AND CABLES The MX-508 mixer is fitted with four types of audio connectors: 3-pin XLR type male (stereo outputs), 3-pin XLR type female (mic inputs), tip-ring-sleeve (TRS) phone jack, and RCA jack. Certain 1/4" jack connections use an unbalanced mono plug, which is also shown. Tip (+) Stereo Phone Plug used for balanced Tip (+) Sleeve (Ground) Mono Phone Plug used for unbalanced XLR pins are numbered in the connector insert.
Operating Manual - MX-508 Stereo Microphone/Line Mixer 5.5 Aux Send Outputs The Aux Outputs are used to drive monitors, effects processors, recording devices, or any function which requires isolated level control from the main outputs. They are pseudo-balanced 1/4" tip-ring-sleeve. Transformer Balanced -R- Output -LAux 1 Send 5.6 Aux Return Inputs The return inputs are 1/4" unbalanced. Return 1 is stereo with a left and right input, while Return 2 is mono.
Operating Manual -MX-508 Stereo Microphone/Line Mixer 6. TYPICAL APPLICATIONS: 6.1 Small Sound Reinforcement System: In the setup shown here, the MX-508 is used to mix typical sound sources that might be found in a small club, school theater or similar environment. Six of the input channels are used for microphones for live vocal or instrumental pickup.
Operating Manual - MX-508 Stereo Microphone/Line Mixer 6.3 Location Recording or Broadcast Mixing: In this setup the MX-508 is used to mix sources typically found in location recording or broadcast situations (mostly microphones). In this case, two of the microphones are wireless types, so the channel input actually comes from the microphone receivers. Since the output from the mic receivers is at line level, the input selectivity of the respective channels must be set accordingly.
Operating Manual -MX-508 Stereo Microphone/Line Mixer 7.2 Installation of Input Transformers The MX-508 is designed to accept optional plugin input isolation transformers with a minimum of tools and no soldering. Instructions for installation are included with the kit when you purchase an Ashly MX-508 ITCKit (no. 40A5902) 8. TROUBLESHOOTING TIPS 8.1 No Sound Check the AC power. Is the power switch on and illuminated? Check the level meters.
Operating Manual - MX-508 Stereo Microphone/Line Mixer 10. SPECIFICATIONS DISTORTION 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 . . . . . . . . . . . . . . . . . <-129dBu equivalent input hum and noise with input transformer option . . . . . . . . . . . . .
Operating Manual -MX-508 Stereo Microphone/Line Mixer MX-508 Power Supply Card Schematic 12.
MX-508 Left and Right Output Card Schematics Operating Manual - MX-508 Stereo Microphone/Line Mixer 13
MX-508 Send/Return Card Schematic Operating Manual -MX-508 Stereo Microphone/Line Mixer 14
MX-508 Input Channel Card Schematic Operating Manual - MX-508 Stereo Microphone/Line Mixer 15
Operating Manual - MX-508 Stereo Microphone/Line Mixer ASHLY AUDIO INC. 847 Holt Road Webster, NY 14580-9103 Phone: (716) 872-0010 Fax: (716) 872-0739 Toll Free (800) 828-6308 Internet: http://www.ashly.com/ 1997 by Ashly Audio Corporation. All rights reserved worldwide.