George Massenburg Labs GML 8200 User Manual

G e o r g e M a s s e n b u r g L a b s
GML 8200 Parametric Equalizer Series II
The GML 8200 Parametric Equalizer is the reference standard parametric equalizer,
from the engineer who invented the concept. Its revolutionary circuitry was first
envisioned by George Massenburg and is now embodied in this fifth-generation
progressive design.
Owner's Manual
Version 1.0
April, 2001
All materials herein © GML, LLC.
GML,LLC
P.O. Box 1366
Franklin, TN 37065
615.790.1016 (ph)
615.794.4802 (fax)
gmlinc@ix.netcom.com

George Massenburg Labs GML 8200 Specifications

General

Brand	George Massenburg Labs
Model	GML 8200
Category	Stereo Equalizer
Language	English

Summary

GML 8200 Parametric Equalizer Series II Introduction

Owner's Manual Details

Provides the version number and publication date of the owner's manual.

GML, LLC Contact Information

Lists the address, phone, fax, and email for GML, LLC.

Product Introduction and Features

Introduction to the GML 8200

Describes the GML 8200 as a reference standard parametric equalizer with a rich history.

Key Features of the GML 8200

Lists the distinguishing technical characteristics and design elements of the GML 8200.

Operation of the GML 8200

Parametric Equalization Principles

Explains the fundamental concepts of parametric equalization, including gain, frequency, and Q.

Front Panel Control Functions

Details the functionality of amplitude, frequency, and Q potentiometers on the front panel.

Front Panel Description

Cut/Boost and Frequency Control Potentiometers

Explains the function of potentiometers controlling gain, attenuation, and center frequency.

Q Control, Power, and EQ IN Switches

Describes the Q potentiometer, power indication LED, and EQ IN/OUT switch.

Back Panel Description

Input, Output, and Power Connectors

Details the XLR connectors for I/O and the 5-pin DC power supply input.

Grounding and Identification Features

Explains chassis ground, electronics ground, and the serial number tag.

Design Philosophy and Engineering

Circuit Design and Component Quality

Discusses the exemplary input/output buffering, discrete circuitry, and component selection.

Dynamic Range and Bandwidth Advantages

Highlights the benefits of discrete design for dynamic range and extended frequency response.

Power Supply and Noise Considerations

Importance of the External Power Supply

Emphasizes the role of the GML 8355 for clean, quiet power delivery.

Understanding Noise Performance

Explains how noise performance is affected by operational settings and design.

Technical Specifications

Input and Throughput Specifications

Details impedance, rejection ratios, distortion, and slew rate.

Output, Power, and Mechanical Specifications

Covers output clipping, offset, power consumption, and physical dimensions.

Specification Notes and Clarifications

Troubleshooting and Service

Unit Sensitivity and Non-Serviceability

Warns about the unit's complexity and lack of user-serviceable parts.

Procedures for Reporting Failures

Guides users on contacting the GML repair department for operational failures.

Contact and Ordering Information

General and Technical Support Contacts

Provides contact details for GML, LLC, including general inquiries and technical information.

Repair and Pricing/Ordering Contacts

Lists specific contacts for unit repairs and product pricing or ordering.

Copyright and Ownership Notice

Intellectual Property and Usage Restrictions

States GML's sole ownership of intellectual property and prohibits unauthorized use.

Credits and Technical Contributions

Acknowledges the individuals who contributed to the manual's concept, writing, and editing.

Additional GML Peripherals

List of Other GML Products

Enumerate other professional audio peripherals manufactured by GML.

Ordering Information and Website

Provides contact details for ordering additional products and the company's web address.