Related Manuals for Ingram Engineering MPA575
Summary of Contents for Ingram Engineering MPA575
- Page 1 NGRAM NGINEERING MPA575 Microphone Signal Processor Pre-amplifier, Equalizer, Compressor Owner’s Manual July 2014...
- Page 2 MPA575 Owner’s Manual 7/2014...
-
Page 3: Table Of Contents
Power does not turn on……………………………………………………………………….. …………………….25 Microphone Input Audio Sounds Distorted……………………………………………………………………….. 25 Compressor Internal Side Chain Equalizer Does Not Function………………………………………………… 26 Hum or Buzz is Audible……………………………………………………………………………………………... 26 CONTACT INFORMATION………………………………………………………………………….. 26 WARRANTY INFORMATION……………………………………………………………………….. .27 MPA575 MICROPHONE SIGNAL PROCESSOR RECALL SHEET……………………………. 30 7/2014... - Page 4 Figure 3: Edge Connector Pin Assignments………………………………………………………... 9 Figure 4: Attenuation or Gain vs. Stepped Switch Position……………………………………… 13 Figure 5: MPA575 with Internal Side Chain Filter………………………………………………..17 Figure 6: MPA575 with External Side Chain Filter………………………………………………... 17 Figure 7: Line Mode Slide Switch Location………………………………………………………... 19 Figure 8: Line Mode Slide Switch Close-Up……………………………………………………….
-
Page 5: Introduction
As the mic load impedance setting is changed or the EQ and compressor are switched in and out, the gain stages are automatically adjusted so that the MPA575 gain is constant, within just a few tenths of a dB. Therefore, A-B audio quality comparisons when changing settings is extremely easy and more informative. -
Page 6: Front Panel Features
MPA575 Owner’s Manual FRONT PANEL FEATURES Impedance Presented to Phantom Power Toggle Switch Phase Invert Overload LED Lights at 1% THD Gain in dB Signal LED Lights at -30 VU Input EQ In / Out Switch High Pass Filter Variable from 30 Hz to... -
Page 7: Quick Start Guide
Side Chain (SC) EQ. It is worth noting that extra effort has been made for the MPA575 design to automatically hold the total gain constant to within +/- 0.2 dB as the Mic Load switch is changed and as the EQ is switched in and out. -
Page 8: Block Diagram
MPA575 Owner’s Manual BLOCK DIAGRAM A block diagram of the MPA575 is shown below. Figure 2: Block Diagram 7/2014... -
Page 9: Edge Connector Pin Assignments
MPA575 Owner’s Manual EDGE CONNECTOR PIN ASSIGNMENTS Power, ground and audio signal interface to the MPA575 is through the edge card connector at the rear of the module. Assignments of the edge card connector pins follow: Pin 1 Chassis Ground... -
Page 10: Safety Instructions
MPA575 Owner’s Manual SAFETY INSTRUCTIONS 1. Read Instructions All the safety and operation instructions should be read before this product is operated. 2. Retain Instructions The safety and operating instructions should be kept for future reference. 3. Heed Warnings All warnings on the product and in these operating instructions should be followed. - Page 11 MPA575 Owner’s Manual 10. Servicing The user should not attempt to service this product beyond those means described in this operating manual. All other servicing should be referred to the Ingram Engineering Service Department. 11. Compatible Microphone Cables To prevent hazard or damage, ensure that only microphone cables and microphones designed to IEC 268-15A are connected.
-
Page 12: Instructions For Use
MPA685 impedance selector can also be used to guarantee that the microphone manufacturer’s requirements are met. The MPA575 is designed to provide the input transformer, and therefore the mic, with constant impedance load, independent of any pre-amp settings, therefore guaranteeing consistent and excellent transient, frequency and phase response, load impedance and noise matching. -
Page 13: Adjusting The Audio Input Level
Input knob by one step. This maximizes the dynamic range of the audio and also realizes good MPA575 audio quality. Minimum of 5dB headroom is realized by following this procedure. For maximum linearity, the Overload LED should never light. -
Page 14: Overload Leds
MPA575 Owner’s Manual 5. Overload LEDs The Overload LEDs (O/L) are triggered by fast responding peak detector circuits. The LEDs first begin to illuminate at ~1% THD and remain on for levels above the trigger point. The Overload detection circuitry accurately tracks the 1% THD threshold to frequencies higher than 20 kHz. -
Page 15: High Pass (Low Cut) Filter
An internal MPA575 low / high frequency EQ is dedicated to the compressor path and is used as a side chain filter. For more extreme side chain possibilities, the side chain path is also routed to the 500-series API "Option"... -
Page 16: Using The Compressor Side Chain Filter
A/B comparisons of the audio quality can made. 11. Using the Compressor Side Chain Filter An internal MPA575 low / high frequency EQ is dedicated to the compressor path and is used as a side chain filter. For more extreme side chain possibilities than are offered with the see-saw type filter internal to the MPA575, an external side chain filter can be used. -
Page 17: Figure 5: Mpa575 With Internal Side Chain Filter
MPA575 Owner’s Manual Figure 5: MPA575 with Internal Side Chain Filter Figure 6: MPA575 with External Side Chain Filter 7/2014... -
Page 18: Adjusting The Output Level
10, 16, 22 and 28. Because the attenuator is inactive in Line mode, the MPA575 gain is at its minimum and is constant for stepped switch positions 10, 16, 22, 28 and 34. -
Page 19: Figure 7: Line Mode Slide Switch Location
MPA575 Owner’s Manual increased above 34. Max MPA575 gain in Line Mode is 57dB, and is realized with the stepped switch at fully clockwise position. The following photographs show the location of the slide switch relative to the edge connector and show a Line mode switch close-up. -
Page 20: Mix Bus Settings
500-series module outputs. The MPA575 takes advantage of this usage. The MPA575 has a slide switch that is used for enabling or disabling the Mix Buss option. When disabled, the MPA575 output is disconnected from the Mix Bus on Pin 11. For most applications, it is acceptable to always leave the Mix Buss enabled and therefore connected to Pin 11. -
Page 21: Figure 9: Slide Switch Showing Mix Buss Switch Assignment
MPA575 Owner’s Manual Figure 9: Slide Switch Showing Mix Buss Switch Assignment 7/2014... -
Page 22: Figure 10: Standard Mix Bus Configuration
The mix bus can be configured as a typical low impedance (~10 Ohms) output for driving high impedance mix buss inputs. The MPA575 is configured in this mode when shipped from the factory. This configuration realizes the following equivalent block diagram:... -
Page 23: Audio Specifications
MPA575 Owner’s Manual AUDIO SPECIFICATIONS =+25°C unless otherwise noted) Parameter Unit Comments MPA575 Input Impedance Mic Mode Low Setting Ω Mic Mode High Setting 2.4k Ω Line Mode Low Setting 2.9k Ω Line Mode High Setting Ω Nominal Gain vs Input Stepped Switch... -
Page 24: Environmental Specifications
MPA575 Owner’s Manual Parameter Units Comments <10 Hz to 22 kHz BW, 150 Ohm Total Harmonic Distortion + Noise, Min Source, 2.4kHz Input Impedance, 1kHz +10 dBu Output 0.002 <10 Hz to 22 kHz BW, Noise, Input Referred No Weighting, 150 Ohm Source,... -
Page 25: Care And Maintenance
Red O/L LED is not illuminated. If the audio is still distorted, check the MPA575 input impedance and change it to the 2.4k Ohms position if it is not already in this position. Some microphones require a higher impedance load to operate without distortion at high levels. -
Page 26: Compressor Internal Side Chain Equalizer Does Not Function
MPA575 Owner’s Manual less compression, or change the side chain Equalizer from boost mode to flat response. If an external side chain equalizer is used, check the gain of the external equalizer and check the amount of frequency boost is being utilized. The external side chain equalizer could potentially distort for excessive boost, and this may cause artifacts with the MPA575 Compressor. -
Page 27: Warranty Information
Failure to register the product will not void the three year warranty. Service and repairs of Ingram Engineering products are to be performed only at the factory OR at an authorized Ingram Engineering Service Center. Unauthorized service, repairs, or modification will void this warranty. - Page 28 Ingram Engineering product is still covered by the Three Year Limited Warranty. Make sure the problem can be duplicated. If you bring your Ingram Engineering product to an Authorized Service Center and they can’t find anything wrong with it, you may be charged a service fee.
- Page 29 This is your sole warranty. Ingram Engineering does not authorize any third party including any dealer or sales representative, to assume any liability on behalf of Ingram Engineering or to make any warranty for Ingram Engineering.
-
Page 30: Mpa575 Microphone Signal Processor Recall Sheet
MPA575 Owner’s Manual MPA575 MICROPHONE SIGNAL PROCESSOR RECALL SHEET Notes _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________... - Page 31 Tel: +1 (678) 685-9838 Ingram Engineering makes no warranty of any kind with respect to the material in this document and shall not be liable for errors contained herein or for incidental or consequential damages related to the use of the material.
Need help?
Do you have a question about the MPA575 and is the answer not in the manual?
Questions and answers