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Designed and built by musicians. Made in the USA.

Will from Sound on Sound magazine interviews Eric Ingram.

Ingram Engineering specializes in the design and production of the highest quality and most versatile studio tools available. Classic circuit design topologies and techniques are used as a basis for original designs and feature sets that provide great sound and unparalleled consistency under all usage conditions.

Products for the modern studio

From the MPA685 PREAMP:

"This is the kind of preamplifier I want to see more of in our world. It does what it’s supposed to do and it doesn’t add much else to the sound. ...built with care... to last several lifetimes." - Scott Dorsey Recording Magazine

To the EQ50 500 Series Equalizer:

"...even at the maximum spec'd input level of 20dBu, the THD (total harmonic distortion) is quoted as being a mere .002%. That is insane! It quickly became apparent they weren't kidding when they said these units were clean. Actually, clean is an understatement. They are invisible, yet beautiful at the same time." - Michael Frasinelli APN Magazine

500-Series Buffer and Impedance Controller

Two Channel Buffer

  • Input Impedance: 10 MΩ
  • Output Impedance Selectable: 50, 150 or 600 Ω
  • Selectable Channel Mode
  • True Left/Right Stereo
  • L/R Summed to Mono
  • Left Split to Both Outputs
  • Stereo Output Level Control
  • Transformer Coupled Inputs and Outputs
  • 1/4” Balanced Input and Output on Front Panel
  • Left Channel Input and Output Also Accessible Via 500-Rack XLR on Back Panel

500-Series Equalizer

Mastering Quality Filter Module

  • Low Cut Filter
  • See-Saw Filter
  • High Cut Filter
  • Extremely Wide Adjustment Range Low and High Cut Filters
  • Switchable See-Saw Filter Pivot Frequency
  • High Headroom
  • Low Distortion
  • Balanced I / O
  • Unity Gain
  • Hardwire Bypass

500-Series Microphone Pre-amplifier, Compressor and Equalizer

A complete and cost effective mic signal processor

  • Mic Pre-amp
  • Compressor
  • Equalizer
  • All the beautiful sound shaping capabilities of the rack mount line squeezed into a 500-series chassis
  • Program dependent compressor with side chain EQ
  • Combined Low-High frequency equalizer for broad frequency response shaping
  • Variable frequency low cut filter
  • Transformer coupling and two-stage gain provided by natural sounding JFET amplifiers
  • Variable mic input impedance with ultra wide frequency range for shaping tones
  • Very high headroom

Microphone Pre-amplifier, Direct Box and Re-amplifier

The most versatile studio tool available in a single chassis

  • Direct Box
  • Re-amplifer
  • The MPA685 combines the best features of the MPA681 and the MPA201
  • Variable mic input impedance with ultra wide range for shaping tones
  • Transformer coupling and JFET amplifiers with excellent sound and the best transient response
  • Very high headroom
  • Extremely tight gain matching between channels for stereo mic or make-up gain applications
  • Two-stage gain structure

Microphone Pre-amplifier and Direct Box

  • Mic Pre-amp and Direct Box integrated in a single chassis
  • Variable mic input impedance geared to the low impedance range
  • Extremely tight gain matching between channels for stereo mic or make-up gain applications
  • Transformer coupling and JFET amplifiers with excellent sound quality
  • Currently out of production, but the excellent features and sound quality of the MPA681 have been included in the MPA685
Davis Causey with MPA681 at Last House Studio
Bakos with MPA201
Jeff Bakos with MPA201 at Bakos Amp Works

Microphone Preamplifier

  • The legendary high voltage discrete design that started it all
  • Currently out of production but still producing great sounds in studios everyday

Our Dealers


Ordering our products is easy. Contact our dealers or complete the contact form. Indicate which item you want or have questions about and press the Send Message button. We will be in touch with you. We accept payment through PayPal. Money back guarantee. Like us on FaceBook.


PO Box 5870
Atlanta, GA 31107

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