Solid State Logic E Series User manual

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E Series EQ Module
for 500 Series Racks
User Guide

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Safety and Installation Considerations
This page contains denitions, warnings, and practical information to ensure a safe
working environment. Please take time to read this page before installing or using this
apparatus.
General Safety
• Read these instructions.
• Keep these instructions.
• Heed all warnings.
• Follow all instructions.
• Do not use this apparatus near water.
• Do not expose this apparatus to rain or moisture.
• Clean only with dry cloth.
• Do not block any ventilation openings.
• Install in accordance with the rack manufacturer’s instructions.
• There are no user-adjustments, or user-servicable items, on this apparatus.
• Adjustments or alterations to this apparatus may affect the performance such
that safety and/or international compliance standards may no longer be met.
• This apparatus is not to be used in safety critical applications
Caution
• This apparatus should not be used outside of the scope of API 500 series
compatible racks.
• Do not operate this apparatus with any covers removed.
• To reduce the risk of electric shock, do not perform any servicing other than that
contained in these Installation Instructions unless you are qualied to do so. Refer
all servicing to qualied service personnel.
Installation
• Ensure power is removed from the rack before tting or removing this apparatus to
or from the rack.
• Use the panel xing screws supplied with the rack to secure this apparatus into the
rack.

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Standards Compliance
This apparatus is designed to be installed and used in API
500 series compatible racks which are CE marked. The CE
mark on a rack is indicative that the manufacturer conrms
that it meets both EMC and the Low Voltage Directive
(2006/95/EC).
Instructions for Disposal of WEEE by Users in the
European Union
The symbol shown here is on the product or on its
packaging, which indicates that this product must not
be disposed of with other waste. Instead, it is the user’s
responsibility to dispose of their waste equipment by
handing it over to a designated collection point for
recycling of waste electrical and electronic equipment. The separate
collection and recycling of your waste equipment at the time of
disposal will help to conserve natural resources and ensure that
it is recycled in a manner that protects human health and the
environment. For more information about where you can drop
off your waste equipment for recycling, please contact your local
city ofce, your household waste disposal service or where you
purchased the product.
Limited Warranty
Please refer any warranty claim to the supplier of this equipment in
the rst instance. Full warranty information for equipment supplied
directly by Solid State Logic can be found on our website:
www.solidstatelogic.com

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Introduction
Congratulations on your purchase of this API 500 series compatible
SSL E Series EQ module.
This module has been specically designed to operate in an
API 500 series rack such as the API lunchbox® or equivalent. In
common with many such modules, the nominal input/output level is
+4dBu.
Your new E Series EQ module is a re-implementation of two of the
classic SSL EQ circuits, dating back to the original E Series con-
soles. The module defaults to the original ‘Brown Knob’ circuit that
was standard on all early production E Series consoles but can be
switched to emulate the later ‘Black Knob’ circuit.
Operation
Please refer to the illustration on page opposite.
The IN button switches the entire module in and out of circuit.
The BLK button switches the module from the default ‘Brown
Knob’ EQ to ‘Black Knob’ EQ.
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‘Brown Knob’ EQ
With the BLK button out, the two parametric mid-band sections
feature SSL’s classic logarithmically symmetric design ensuring that
the ±3dB up/down points retain the same musical interval from the
centre frequency regardless of frequency and amplitude settings.
The two shelving sections are traditional 6dB/octave designs with
an option for a xed Q parametric response (by way of the BELL
button).
The ‘02’ EQ, to give it its correct name, was used on countless
recordings and mixes in the early eighties.
‘Black Knob’ EQ
In the mid-eighties a new ‘242’ EQ circuit was developed in con-
junction with the legendary George Martin for the rst SSL console
to be installed in AIR studios. The ‘Black Knob’ EQ, as it became
known, featured enhanced cut and boost ranges (±18dB instead of
±15dB) together with a different control law for tighter control of low
frequencies.
It is this design which is retained today as the ‘E Series’ EQ option
of the Origin, AWS 924, AWS 948 and Duality consoles.

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Visit SSL at:
www.solidstatelogic.com
© Solid State Logic
All rights reserved under International and Pan-American Copyright Conventions
SSL® and Solid State Logic® are ® registered trademarks of Solid State Logic.
ORIGIN™, SuperAnalogue™, VHD™ and PureDrive™ are trademarks of Solid State Logic.
All other product names and trademarks are the property of their respective owners and are
hereby acknowledged.
No part of this publication may be reproduced in any form or by any means, whether me-
chanical or electronic, without the written permission of Solid State Logic, Oxford, OX5 1RU,
England.
As research and development is a continual process, Solid State Logic reserves the right to
change the features and specications described herein without notice or obligation.
Solid State Logic cannot be held responsible for any loss or damage arising directly or
indirectly from any error or omission in this manual.
PLEASE READ ALL INSTRUCTIONS, PAY SPECIAL HEED TO SAFETY WARNINGS.
E&OE
July 2020
Revision History
Revision V2.0, June 2020 - Revised Layout Release for Module Update