Heritage Audio MOTORCITY EQualizer Manual de usuario
USER MANUAL
August/2022)Rev.)1.0.)
7 BAND PASSIVE EQ
AMERICAN HERITAGE
2
INTRODUCTION
CONTENTS
DESCRIPTION
COMPLETE FREQUENCY DESCRIPTIONS
INDIVIDUAL FREQUENCY DESCRIPTIONS
GETTING STARTED
APPLICATIONS!
SPECIFICATIONS!
SIGNAL FLOW!
TROUBLE SHOOTING
WARRANTY STATEMENT
REGISTRATION
RECALL SHEETS
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2
3
4
5
12
13
16
16
17
18
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INTRODUCTION
TABLE OF CONTENTS
Thank you for choosing the MOTORCITY EQualizer. Heritage Audio is dedicated to bringing you ´the sound of
yesterday for tomorrow´. We specialize in capturing that unique, enticing sound that everybody has fallen in love with.
For years engineers, producers and musicians have been yearning for that classic vibe. Usually the only option is to
search for old, used original equipment that is almost always in a questionable state of operation. This brings with it a
whole lot of other issues, making the experience less than desirable. Not to mention the very high prices asked for this
equipment, which makes them virtually unobtainable for the great majority. Now it´s possible to obtain that same sound
with a brand new piece that will give you all the problem-free, heavy-duty use you´ll need for years of music making
history.
Peter Rodriguez
CEO!
Heritage Audio - Madrid, Spain
© 2022 Heritage Audio S.L. is the sole owner of the copyright of all information and drawings contained in this manual which are not to be copied or
reproduced by any means or disclosed in part or whole to any third party without written permission.
Heritage Audio reserves the right to alter specifications without notice. The information in this manual has been carefully checked and is believed to
be accurate at the time of publication. However, no responsibility is taken by us for inaccuracies, errors or omissions nor any liability assumed for any
loss or damage resulting either directly or indirectly from use of the information contained within it.
MOTORCITY EQ
AC POWER CORD EU & US
POWER SUPPLY HA-PSU04
DESCRIPTION
Heritage Audio would like to congratulate you on being the lucky owner of our MOTORCITY EQualizer, the world’s first
reproduction of the “Holy Grail” of classic EQ’s. With its introduction the MOTORCITY EQualizer is the first member of
our ´American Heritage´ line of products as it´s a faithful reproduction of the actual EQs from Detroit´s very own
MOTOWN Studios. Originally designed by in-house engineers with the idea of producing the greatest possible impact
on the music they were creating that dominated the charts for over a decade. This was their secret weapon.Until now
we have mainly focused on designing and manufacturing equipment inspired by legendary vintage British console
modules, using the same hand-wired, transformer-coupled Class A circuitry, but also making sure they are compatible
with modern day studio environments.Now we wanted some of that American flavor.
After a long gruelling process of meticulously researching and engineering everything to the exact original specifications
of this iconic 1960s Motown design, we did it.We actually achieved that huge, classic, punchy, warm signature sound
that has blessed so many hit records all without a hint of harshness or distortion.It wasn´t easy, but it was definitely
worth it. Sadly, there were only about 2 dozens of these EQs produced so we were very lucky to get our hands on 2
original Motown units owned by eight-time Grammy winning producer, mixdown artist, and innovative engineering
genius Michael Brauer.With these two we were able to make a spec-to-spec copy to ensure we capture that
unmistakable sound. The unique passive equalization circuit we incorporated is identical to the original design. And with
the 10-gauge hand brushed aluminum face plate, historically accurate control layout including custom molded bakelite
knobs, the MOTORCITY EQualizer certainly looks the part."
The MOTORCITY EQualizer is a completely analog, passive EQ design with access to seven frequency points across
the tonal spectrum.Each frequency has a stepped rotary switch capable of a flat response at ´0´ and a cut or boost of up
to 8 db in 1 dB stepped increments. As these are stepped rotary switches it´s very easy to make precise settings and
quick recalls. Frequency points are at: 50 Hz, 130 Hz, 320 Hz, 800 Hz, 2000 Hz, 5000 Hz, and 12,500 Hz.It also
features a master gain control (±8 dB), again in 1 dB stepped increments.
Reproducing a vintage design supposes many challenges, but one of the biggest is that it is no longer possible to obtain
the original parts.Therefore, we at Heritage Audio had to have them custom built from scratch. We only used 100 %
period-correct materials, values and tolerances. That means this MOTORCITY EQualizer is the real deal, not just
something similar, a close copy or a ´new and improved´ version of the original. You might ask why we went through so
much trouble to recreate this all-time classic…Well, we couldn´t say it any better than Michael Brauer himself when
asked about the EQs - ´It simply got that sound!´.
The MOTORCITY EQualizer really is the genuine article made available to the general public for the first time
ever.Something to be celebrated for sure. For the first time in history you can incorporate this one-of-a-kind equalizer
into your own setup.Now we can´t guarantee you the massive string of hits that Motown had over six decades ago, but
we can provide you with a tool that´ll pump up your tracks with the sound that did."
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COMPLETE FREQUENCY DESCRIPTIONS
100
1000
10000
Hz
dBu
15!
10!
5!
0!
-5!
-10!
-15
50 Hz
130 Hz
320 Hz
800 Hz
2000 Hz
5000 Hz
12500 Hz
INDIVIDUAL FREQUENCY DESCRIPTIONS
5
50 Hz - Boost/Cut Curves
100
1000
10000
Hz
dBu
15!
10!
5!
0!
-5!
-10!
-15
50 Hz
Usually felt more than heard - Adds weight & a solid foundation and hits in the chest.
Can increase Low-end rumble(noise).
SUB-BASS
6
130 Hz - Boost/Cut Curves
100
1000
10000
Hz
dBu
15!
10!
5!
0!
-5!
-10!
-15
130 Hz
Add for warmth, deeper sound and more thump.
Too much makes things boomy, too little makes things too thin.
BASS
7
320 Hz - Boost/Cut Curves
100
1000
10000
Hz
dBu
15!
10!
5!
0!
-5!
-10!
-15
320 Hz
Used to add bass presence, definition and fullness.
Too much makes things muffled and muddy, too little makes things hollow.
LOW MIDRANGE
8
800 Hz - Boost/Cut Curves
100
1000
10000
Hz
dBu
15!
10!
5!
0!
-5!
-10!
-15
800 Hz
Helps to make things stand out in the mix.
Too much can produce honk and cause ear fatigue, so use carefully.
MIDRANGE
9
2 kHz - Boost/Cut Curves
100
1000
10000
Hz
dBu
15!
10!
5!
0!
-5!
-10!
-15
2 kHz
Used to add presence and definition of attacks of drums & percussion and add crunch &
whack.
Too much will cause ear fatigue, so use carefully.
UPPER MIDRANGE
10
5 kHz - Boost/Cut Curves
100
1000
10000
Hz
dBu
15!
10!
5!
0!
-5!
-10!
-15
5 kHz
Used to add clarity to signals and give them an edge.
Too much will make things harsh and irritating while reducing will distance the sound.
PRESENCE
Tabla de contenidos
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