Heritage Audio ELITE Series User manual

USER MANUAL
MONO CHANNEL CLASS A
MICROPHONE PREAMP / 3 BAND EQ
ELITE SERIES
HA-73 EQ
August/2022)Rev.)1.0.)

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INTRODUCTION
CONTENTS
DESCRIPTION
GETTING STARTED
APPLICATIONS!
SPECIFICATIONS!
SIGNAL FLOW!
TROUBLE SHOOTING
WARRANTY STATEMENT!
REGISTRATION!
RECALL SHEETS
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TABLE OF CONTENTS
Thank you for choosing the Elite Series HA-73EQ. 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
INTRODUCTION
© 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.
HA-73EQ
AC POWER CORD EU & US
POWER SUPPLY HA-PSU04

DESCRIPTION
HA-73 EQ
The HA73EQ Elite is made to the same specifications as the acclaimed 73 JR II, 73EQ JR and DMA 73 Heritage Audio
models at a price never heard before.
Leveraging the expertise and reputation obtained with its popular hand wired, extremely time-consuming hand soldered
series, Heritage Audio is able to offer a zero compromise, high quality yet very affordable alternative to the growing
entry-level brands.
A combination of mass production, lean manufacturing and modern construction techniques, minimizes hand labor and
therefore its high associated costs when manufacturing takes place in Western Europe. By passing the savings straight
into the end users´ pockets, Heritage Audio releases the most affordable outboard preamps and equalizers in its class
up to date.
Key components to obtain a true vintage sound are indeed maintained, like the industry standard Carnhill transformers,
hand wound in St Ives, England.
Manufactured in the same Spanish facilities as the rest of the Heritage Audio line of products, the HA73EQ Elite rack
mountable mic preamp equalizer presents the complete classic recording channel that, for generations, has been
regarded for its rich, musical qualities and its ability to dramatically improve the sound of almost any source.
No 73 equalizer will present the correct equalization curves without high quality capacitors and, most importantly, correct
“Vinkor” type pot core inductors. More than often this type of products have these expensive inductors replaced with
generic ferrite core ones or, even worst, the mid band dual inductor replaced with a single one. Never in"Heritage Audio
products!!, as the impact of replacing these to the eq curves is dramatic, leading to incorrect curve´s shapes"and high
frequency phase distortion which in no way honor the design.
The HA-73 EQ Elite employs WIMA 5% capacitors in the EQ section as well as 3 correct vintage type “Vinkor“ pot core
inductors so the eq curves are virtually undistinguishable from the handmade equalizers in the Heritage Audio line.
Customers can expect the same sonic quality and feel they have come to appreciate from Heritage Audio.
The HA-73 EQ’s preamp section features gain, output trim, -20 db pad, polarity reverse, a high pass filter, and +48 V
phantom power."The HA-73 EQ’s EQ section features a high shelving EQ, midrange EQ, low shelving EQ, a variable
high pass filter, and EQ Bypass,."The HA-73 EQ comes housed in a rugged 1RU British steel and aluminum chassis
and utilizes an external power supply for low noise operation.
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GETTING STARTED
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FRONT
REAR
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4
3
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2
3
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POWER INPUT
To Be Connected to the HA PSU04
Power Supply
LINE OUTPUT
Male XLR Connector
LINE INPUT
Female XLR Connector
MIC INPUT
Female XLR Connector
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3
2
1
All XLRs are:
Pin 1: GND!
Pin 2: Hot!
Pin 3: Cold
1
2
3
3
2
1
GND!
Hot (+)!
Cold (-)
MALE XLR
FEMALE XLR
D.I. Jack:
Tip: Signal!
Sleeve: Ground!
Tip=Signal
Sleeve=Ground/Shield
Tip
Sleeve
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INPUT GAIN SWITCH
5 dB Steps From 30 to 80
HI SHELF at 12kHz
Boost or Cut up to 15 dB at 12
kHz
MID BAND BOOST/CUT
±15 dB of Boost or Cut
MID BAND FREQUENCIES
Selects frequencies from: 0.36,
0.7, 1.6, 3.2, 4.8 and 7.2 kHz.
An OFF position is also
provided to remove the band
from the signal path
LOW SHELF BOOST/CUT
±15 dB of Boost or Cut
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2
3
4
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D.I. INPUT
High Impedance Class A JFET
PHANTOM POWER SWITCH
Activates 48 V
MIC PAD BUTTON
20 dB Reduction Ahead of Input
Transformer
LINE BUTTON
Switches from MIC/D.I. to LINE
input
MIC INPUT IMPEDANCE
(LOZ)
1200 Ωor 300 Ωwhen pressed
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LOW SHELF FREQUENCIES
Selects frequency for the Low
Shelf: 35, 60, 110, 220 Hz
HIGH PASS FILTER
18dB/Octave 3-pole Filter at
selectable frequencies: 50, 80,
160, and 300 Hz. An OFF
position is also provided to
remove the filter from the signal
path
OUTPUT ATTENUATOR
Attenuates from 0 to Infinity
EQL
Turns Equalizer ON and OFF
PHASE BUTTON
Flips phase 180º
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POWER
Activates unit
PHASE PUSH BUTTON
Flips phase 180º
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MIC
APPLICATIONS
D.I.
LINE
ACTIVATE +48 V FOR CONDENSER MIC
OUTPUT
MIC INPUT
USB - COMPUTER
USB - COMPUTER
GUITAR FX PEDAL
OUTPUT
D.I. INPUT
USB - COMPUTER
LINE OUTPUT - KEYBOARD
LINE INPUT
ACTIVATE LINE SWITCH
OUTPUT
LINE INPUT - AUDIO INTERFACE
LINE INPUT - AUDIO INTERFACE
LINE INPUT - AUDIO INTERFACE
CONDENSER MIC

SPECIFICATIONS
•Microphone input impedance: High=1200 Ωminimum; Low= 300 Ωminimum. Higher gain positions gradually have
greater impedances, optimum for low gain ribbon mics. Input is transformer balanced and floating.
•Line input impedance: 10 kΩbridging, transformer balanced and floating.
•Output impedance: Less than 75 Ω, Carnhill transformer balanced and floating, to drive a load of 600 Ω(Factory
terminated).
•D.I. input impedance: Greater than 2 MΩ, unbalanced.
•Maximum output: Greater than +26,5 dBu into 600 Ω(internally terminated).
•THD: Less than 0,025 % at 1 kHz, Less than 0,05 % at 100 Hz.
•Frequency response: 20 Hz (+0,3 dB) to 20 kHz (-0,2 dB).
•Maximum Gain: Slightly greater than 80 dB.
•Output stage noise: Less than -125 dBu.
•Power consumption: Less than 260 mA @48 V DC.
• Dimensions (W x H x L): 482 mm x 44 mm (1 Rack unit) x 184 mm.
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SIGNAL FLOW
MIC/LINE INPUT
LINE OUTPUT
PAD
LOZ
PHASE
D.I.
INPUT AMP
EQUALIZER
HIGH PASS !
FILTER
OUTPUT AMP

TROUBLE SHOOTING
PROBLEMS
SOLUTIONS
There doesn´t appear to be any signal at all arriving at the
back XLR.
Make sure the GAIN knob is not in the ´Off´ position.
There still doesn´t appear to be any signal at all arriving at
the back XLR.
Check to see if a jack cable has been left plugged into the
front panel D.I.
Even at the lowest position on the GAIN knob I still have
too much gain.
When this happens you should activate the PAD button.
This will reduce the input by 20 dB ahead of the input
transformer.
Condenser microphones don´t seem to work with
HA73EQ.
Make sure the red +48 V button is pressed in to activate
the phantom power sent to the microphone.
There doesn´t seem to be any output at all from the unit.
Check to see if the OUTPUT knob is fully turned down as
this will attenuate the signal completely.
Sending a signal to the unit from a DAW overloads it
terrible.
It is necessary to press the LINE button when sending it a
line level source.
If not, it is expecting a Microphone signal with a very
different impedance.
No matter how I adjust the EQ there doesn´t seem to be
any tonal change.
Make sure you have activated the EQ with its
corresponding button.
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* For any further doubts or questions please get in contact with us at: [email protected]!

LIMITED 2 YEAR WARRANTY
Heritage Audio HA73EQ is warranted by Heritage Audio SL to be free from defects in materials and workmanship for the
period of 2 years to the original purchaser. In the event of such defects, the product will be repaired without charge or, at
our option, replaced with a new one if delivered to Heritage Audio prepaid, together with a copy of the sales slip or other
proof of purchase date. The warranty excludes problems due to normal wear, abuse, shipping damage or failure to use
the product in accordance with the specifications.
Heritage Audio shall not be liable for damages based upon inconvenience, loss of use of the product, loss of time,
interrupted operation or commercial loss or any other damages, whether incidental, consequential or otherwise.
This warranty is not transferable.
Heritage Audio and the Heritage Audio “H” logos are registered Trademarks owned and/or licensed by Heritage Audio.
REGISTRATION
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WARRANTY STATEMENT
Please visit our website:
https://heritageaudio.com/registration/

RECALL SHEETS
9
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www.heritageaudio.com
HERITAGE AUDIO. C/ Alfonso Gómez, 38, 3C. 28037 Madrid – Spain. Tel: [phone]
[email protected]