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Ingram Engineering EQ52 Owner's Manual

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I
E
NGRAM
NGINEERING
EQ52
Equalizer
Owner's Manual
May 2021

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Summary of Contents for Ingram Engineering EQ52

  • Page 1 NGRAM NGINEERING EQ52 Equalizer Owner’s Manual May 2021...
  • Page 2 EQ52 Owner’s Manual 5/2021...

  • Page 3: Table Of Contents

    Table of Contents INTRODUCTION FRONT PANEL FEATURES EDGE CONNECTOR PIN ASSIGNMENTS SAFETY INSTRUCTIONS INSTRUCTIONS FOR USE Installing the EQ52 in a Rack Module Warm Up EQ In (Bypass Switch) Setting Audio Levels Low Cut Filter See-Saw Filter High Cut Filter...
  • Page 4 EQ52 Owner’s Manual Table of Figures Figure 1: Front Panel Features Figure 2: Edge Connector Pin Assignments Figure 3: Low Cut Filter Example Responses Figure 4: See-Saw Filter Example Responses, 1 kHz Pivot Frequency Figure 5: See-Saw Filter Example Responses, Range 1 Pivot Frequencies...

  • Page 5: Introduction

    EQ52 Owner’s Manual INTRODUCTION Welcome, and congratulations on your interest in the EQ52 Equalizer! It has been crafted to provide extremely high quality audio and a simple user interface that requires minimal effort to optimize. The EQ52 contains extremely versatile and musical sounding high pass, low pass and see- saw filters with a simple and intuitive user interface.

  • Page 6: Front Panel Features

    EQ52 Owner’s Manual FRONT PANEL FEATURES Hardwire Bypass Around the Entire EQ Low Cut Filter Sweepable from 50 Hz to 5 kHz in Two Ranges See-Saw Filter Adjusting the Knob Simultaneously Adjusts Clockwise Boosts Highs / High / Low Frequencies...

  • Page 7: Edge Connector Pin Assignments

    EQ52 Owner’s Manual EDGE CONNECTOR PIN ASSIGNMENTS Power, ground and audio signal interface to the EQ52 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 8: Safety Instructions

    EQ52 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 9 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. Warning – To reduce the risk of fire or electric shock, do not expose this appliance to rain or moisture.

  • Page 10: Instructions For Use

    EQ is engaged. 4. Setting Audio Levels Ideal levels for the EQ52 are 0 dBu nominal at mid frequencies. While the EQ52 can accept audio levels up to +20 dBu when the EQ settings are flat, the see-saw filter has as much as +8 dB gain when adjusted to its extremes, so it is good practice to set the EQ52 input levels to 0 dBu for maximum headroom.

  • Page 11: See-Saw Filter

    EQ52 Owner’s Manual kHz, significant attenuation of lowest frequencies can be achieved. The plot below filter responses over both ranges. Low Cut Off Low Cut Low Cut Range 1 Range 2 Figure 3: Low Cut Filter Example Responses 6. See-Saw Filter The See-Saw Filter provides simultaneous cut of one frequency band while boosting another band.

  • Page 12: Figure 4: See-Saw Filter Example Responses, 1 Khz Pivot Frequency

    EQ52 Owner’s Manual Figure 4: See-Saw Filter Example Responses, 1 kHz Pivot Frequency Figure 5: See-Saw Filter Example Responses, Range 1 Pivot Frequencies 5/2021...

  • Page 13: High Cut Filter

    EQ52 Owner’s Manual Figure 6: See-Saw Filter Example Responses, Range 2 Pivot Frequencies 7. High Cut Filter The High Cut Filter is a passive first order filter that provides gentle -6dB / octave cut to frequencies above that indicated on the knob. The cutoff frequency adjustment range is very wide, and extends from 3 kHz to >200 kHz.

  • Page 14: Figure 7: High Cut Filter Example Responses

    EQ52 Owner’s Manual Figure 7: High Cut Filter Example Responses 5/2021...

  • Page 15: Using Filters In Combination

    EQ52 Owner’s Manual 8. Using Filters in Combination The following plots show examples applications of the three filters, used in combination. Smooth a stereo mix using the Low Cut and See-Saw filters. Figure 8: Filter Plot, Settings for Smoothing a Stereo Mix Subtle presence boost using the See-Saw, some band limiting using the High Cut filter.

  • Page 16: Figure 10: Filter Plot With Settings That Mute Guitar Pick Noise

    EQ52 Owner’s Manual Using combinations of the See-Saw and High Cut filters as shown below can turn bright guitar tracks played with a pick into tracks that sounds like they were played using only fingers. Figure 10: Filter Plot with Settings That Mute Guitar Pick Noise The filters can also be used to clean a muddy guitar track by using the See-Saw and Low Cut filters.

  • Page 17: Figure 12: Filter Plot For Compressor Sidechain Filter, Mid-High Trigger Frequency

    EQ52 Owner’s Manual The EQ52 can be used as a compressor sidechain filter. An example setting shown below would realize compression that is triggered on mid-highs. This plot uses a combination of the Low and High Cut filters. Figure 12: Filter Plot for Compressor Sidechain Filter, Mid-High Trigger Frequency The sidechain filter example below would realize compression triggered on mid-low frequencies.

  • Page 18: Figure 14: Filter Plot With Presence Boost Settings

    EQ52 Owner’s Manual Slight low-end boost and high frequency reduction using the See-Saw and High Cut filters. Figure 14: Filter Plot with Presence Boost Settings High frequency shelving using the See-Saw filter. Figure 15: Filter Plot with High Frequency Shelf...

  • Page 19: Electrical Specifications

    EQ52 Owner’s Manual ELECTRICAL SPECIFICATIONS =+25°C unless otherwise noted) Parameter Unit Comments k Ω Input Impedance Differential Ω Output Impedance Differential Gain EQ Engaged, Diff Input Max Input Level With <0.5% THD ±3.0 dB, Equalizer On with Flat Frequency Response <10...

  • Page 20: Care And Maintenance

    Check the level being applied to the EQ52. 0dBu (-4VU) is the best nominal audio level to use with the EQ52. The See-Saw filter can realize 8 dB gain when adjusted to its extremes. If EQ52 input levels exceed 12 dBu, it is possible that the audio is being distorted if extreme See-Saw filter settings are being used.

  • Page 21: Contact 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 22 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 23 Ingram Engineering to any location within the boundaries of the USA. Ingram Engineering warrants all repairs performed for 90 days or for the remainder of the warranty period. This warranty does not extend to damage resulting from improper installation, misuse, neglect or abuse, or to exterior appearance.

  • Page 24: Eq52 Equalizer Recall Sheet

    EQ52 Owner’s Manual EQ52 EQUALIZER RECALL SHEET Notes _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________...
  • Page 25 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.

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