Introduction

  • The LEQ-5 is a specialised five-band inductor EQ module crafted to enhance the 'sweet spots‘ across the bass spectrum.

  • The design uses custom-wound ‘tuned’ inductor coils to provide a wide sonic range and highly focused tone shaping with + / - 15dB of gain and attenuation on each band.

Features

  • Five band induction-coil EQ tailored for low / low-mid frequency signal processing.

  • Low and High frequency shelves.

Package Contents

  • LEQ-5 Bass Equaliser module.

  • 16-pin to 10-pin Euro-rack ribbon power cable.

Connecting the LEQ-5

  • Typically we would suggest inserting the LEQ-5 at the end of the audio signal path keeping the input signal level low enough to allow for the cumulative output signal gain possible.


Shelving EQ


  • Separate LF and HF shelving.


Inductive EQ

  • The use of inductors in equalisation circuitry has a rich history going back to the 1950s. Inductors can be found in the signal path of many high end vintage recording consoles, outboard EQ, bass and guitar amplification and effects pedals.

Specifications

  • Input Impedance - 100 kOhm

  • Output Impedance - 100 Ohm

  • Band 1 - 70Hz / Q = 1.75 + / - 15dB

  • Band 2 - 140 Hz / Q = 3 + / - 15dB

  • Band 3 - 280 Hz / Q = 3 + / - 15dB

  • Band 4 - 900Hz / Q = 5.5 + / - 15dB

  • Band 5 - 1.8kHz / Q = 8 + / - 15dB

  • LP Shelving - 100 Hz

  • HP Shelving - 2.2 kHz

  • DC current consumption = 20 mA

Dimensions

  • Panel Height - 128.5mm

  • Panel Width - 16HP

  • Module Depth - 75mm

  • Depth from Euro Rail Front - 53mm

Price

 
 
 
 

History

  • Innerclock Systems and Warren McAlister / Phase Engineering have had a working relationship in the music industry spanning more than 30 years.

Warren McAlister

  • 1975 thru 1980 - Control Data Corporation computer mainframe engineer working at various installations including :-

  • CSIRO Canberra / Australian Bureau of Statistics - Canberra and Sydney / Department of Taxation Canberra / University of NSW / Sydney University / Caltex / BHP

Phase Engineering

  • Established Phase Engineering in 1980 and secured Australasian warranty service arrangements with many premier audio hardware manufacturers including :-

  • ARP / Crumar / Fender / Roland / Emu Systems / Sequential Circuits / PPG / Oberheim / Moog / Alesis / Yamaha / Korg / Kawai / Akai / Marshall / Mesa Boogie

 
 

Design

  • Extensive custom hardware modifications and bespoke product design for many Australian and International artists including :-

  • Devo / Santana / Billy Joel / Eric Clapton / Joe Jackson / Ozzy Osbourne / Midnight Oil / The Angels / INXS / Divinyls / MiSex / Cold Chisel

Drums

  • Drum machine custom sampling / EPROM burning service

  • Audio originally sampled on an Apple II with customised Roland ADA-200 A > D convertor and self-engineered sample editing software and control

  • This system was replaced by an Oberheim Prommer during the mid 1980s

 
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