Heritage Audio 73 EQ JR 3 Band EQ Equalizer User Manual
- June 15, 2024
- Heritage Audio
Table of Contents
Heritage Audio 73 EQ JR 3 Band EQ Equalizer
73 EQ JR
Specifications
- Model: 73 EQ JR
- Type: 3 Band EQ 500 Series Module
- Manufacturer: Heritage Audio
- CEO: Peter Rodriguez
- Location: Madrid, Spain
- User Manual Revision: 1.0
- Date: August/2022
Product Description
The 73 EQ JR is a versatile 3-band EQ module that provides all the EQ
functionality you should ever need. It is designed and manufactured by
Heritage Audio, led by CEO Peter Rodriguez in Madrid, Spain.
Getting Started
Front Panel
- Line Input Gain: Adjust the input gain from +6 to -20 dB.
- High Shelf Frequency Selector: Choose between 10, 12, 16, or 20 kHz.
- Mid Peak Band Frequency Selector: Select from 0.36, 0.7, 1.6, 3.2, 4.8, or 7.2 kHz.
- Low Shelf Frequency Selector : Set the frequency to 30, 60, 110, or 220 Hz.
- EQL Button: Activates the equalizer.
Rear Panel
- 500 Series Connector Slot: Gold-plated slot connector for the 500 series rack.
- Output + (Level): Not used.
- Output – (Level) : Not used.
- Input – (Level) : Not used.
- Input + (Level): Not used.
- GND: Not used.
Applications
The 73 EQ JR can be used in various applications
- MIC – EQ: Connect a condenser microphone and activate +48V if required.
- USB – COMPUTER: Connect to an audio interface or computer via input 1 and output 2. Activate the link switch for slot 1 and install the 73 EQ JR in slot 2.
- INSERT SETUP: Recommended setup for inserting EQ processing on individual tracks. Connect line inputs and outputs to an audio interface, with monitor speakers connected as well.
- LINE INPUT – AUDIO INTERFACE: Connect the line input to an audio interface for direct processing of audio signals.
Specifications
The signal flow of the 73 EQ JR is as follows
- Line Input -> Input Amp -> Equalizer -> Line Output -> Output Amp
Troubleshooting
Problems
- Even at the lowest position on the LINE GAIN knob, I still have too much gain.
- There seems to be a very high output from the unit.
- There seems to be a very low output from the unit.
Solutions
- You will have to reduce the signal level being sent to the 73 EQ JR.
- Adjust the LINE GAIN knob to compensate for any tonal adjustments that raise the signal too much.
- Adjust the LINE GAIN knob to compensate for any tonal adjustments that lower the signal too much.
Warranty Statement
Please visit our website for warranty registration:
https://heritageaudio.com/registration/
Recall Sheets
- Session / Title:
- Date:
- Instrument:
- Track:
- Notes:
- Connected Equipment:
- Switch ON Switch OFF
- Session / Title:
- Date:
- Instrument:
- Track:
- Notes:
- Connected Equipment:
- Switch ON Switch OFF
FAQ
- Q: How can I contact support for further doubts or questions?
A: You can reach us at support@heritageaudio.com.
INTRODUCTION
- Thank you for choosing the 73 EQ JR. 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.
DESCRIPTION
All the EQ you should ever need
- The 73 EQ JR is a fully featured Line Input module for the 500 Series.
- It not only shares the 3-band Equalizer with his big brother, the Heritage Audio 73 80 Series, but also shares the same transformer coupled line preamp and Class A transformer balanced output stage.
- These facts make the 73EQ JR unique on its class, being able to capture a full transformer based, Class A sound without relying on external preamps.
- The Equalizer features the same Baxandall type High and Low shelf found in the HA73 80 Series, with the addition of a high frequency selector switch. 4 different frequencies are possible instead of the fixed 12 kHz one.
- The mid band is the same exact dual inductor one, thick low and sweet high midrange boosts without becoming muddy or brittle.
- The line preamp has a range of +6 to -20 dB, allowing heavy eq boosts without overloading A/D converters.
- Finally, special care has been taken with power handling, implementing internal +24 V slow turn on regulation (about 20 seconds to reach full voltage). This makes your 73 EQ JR independent of the rest of the slots and makes your lunchbox´s PSU happier.
GETTING STARTED
APPLICATIONS
SPECIFICATIONS
- Input impedance: 10 kΩ bridging, transformer balanced and floating.
- Output impedance: Less than 75 Ω, transformer balanced and floating, to drive a load of 600 Ω load.
- Maximum output : Greater than +26 dBu into 600 Ω.
- THD: Less than 0,025 % at 1 kHz, Less than 0,05 % at 100 Hz.
- Maximum Gain: 6 dB.
- Power consumption: Less than 85 mA per rail @ ±16 V DC.
- Dimensions (W x H x L): 38 mm x 135 mm x 150 mm.
SIGNAL FLOW
TROUBLE SHOOTING
| PROBLEMS | SOLUTIONS |
|---|---|
| There doesn´t appear to be any tonal change at all from the 73 EQ JR. | Make |
sure the GAIN knob is not in the ´Off´ position.
There still doesn´t appear to be any tonal change at all from the 73 EQ JR.|
Check to see if the EQL button has been pushed to activate it.
Even at the lowest position on the LINE GAIN knob I still have too much gain.|
You will have to reduce the signal level being sent to the 73 EQ JR.
There seems to be a very high output from the unit.| Adjust the LINE GAIN knob
to compensate for any tonal adjustments made that raise the signal too much.
There seems to be a very low output from the unit.| Adjust the LINE GAIN knob
to compensate for any tonal adjustments made that lower the signal too much.
For any further doubts or questions please get in contact with us at: support@heritageaudio.com
WARRANTY STATEMENT
- LIMITED 2 YEAR WARRANTY
- Heritage Audio 73 EQ JR 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.
REGISTRATION
- Please visit our website:
RECALL SHEETS
- www.heritageaudio.com
- HERITAGE AUDIO. C/ Alfonso Gómez, 38, 3C. 28037 Madrid – Spain.
- Tel: +34 917 266 189
- info@heritageaudio.com
References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>