Heritage Audio 457623 Stereo Bus Compressor User Manual

: June 9, 2024
: Heritage Audio

Table of Contents

Heritage Audio 457623 Stereo Bus Compressor
INTRODUCTION
DESCRIPTION
GETTING STARTED
APPLICATIONS
SPECIFICATIONS
TROUBLE SHOOTING
WARRANTY STATEMENT
RECALL SHEETS
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

Heritage Audio 457623 Stereo Bus Compressor

INTRODUCTION

Thank you for choosing the SUCCESSOR. 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

DESCRIPTION

Classic British Diode-bridge Compression
The Heritage Audio SUCCESSOR stereo mixbus compressor is a first in its class, finally allowing creative engineers, producers and musicians to apply warm, colorful and fat compression. Until its release all that was previously available was clean and transparent VCA-based processors for these duties. While often adequate for the Mix Bus, they just don´t have anywhere near the mojo, energy and vitality that the SUCCESSOR can offer. Traditionally, bus compression has been taken care of by VCA-style devices, based on ICs, which are wholly unrelated to the warmth, fatness and character typically associated with discrete Class A technology, including chunky transformers and diode bridge-based gain reduction. The Heritage Audio SUCCESSOR brings all of this…and more. Adopted early by top class engineers such as Chris Lord-Alge, the SUCCESSOR will let you feel how your separate tracks interact and blend together in a way not possible when Master Bus compression duties are relegated to the mastering stage. A fully Carnhill transformer coupled input and output unit, the SUCCESSOR is a true-stereo diode bridge-based bus compressor with advanced sidechain filtering and built-in parallel processing capabilities, with the Class A 73 type output stage that Heritage Audio is famous for. Carnhill input transformers are hand wound at the Oxford factory exclusively for Heritage Audio, enclosed in green mu metal cases for modern day studio noise immunity. The vintage character is indeed guaranteed and you won´t find them in any other brand´s products.

Heritage Audio 457623 Stereo Bus Compressor - 1

Based on legendary vintage diode designs, the SUCCESSOR keeps the sonic character of such units, but the added features have already taken it into legendary status on its own. It is a new beast on its own and will make your mixes shine in modern production environments. Ultra-fast attack and releases allow for larger than life drum bus compression sounds, snare drums can be more present and the stereo image widens as there is more natural room for tracks to breathe. To make things even more versatile, a complex sidechain filter has been implemented, departing for the traditional, simple high pass one. Sophisticated sidechain filters let you sculpt your mix in ways not previously possible. And not only does the SUCCESSOR contain a great selection of internal sidechain filters but it is also possible to use an external sidechain when necessary with its back panel ¼ jack connections. From FET- like, all-buttons-in drum sounds (and in stereo!) to VCA-style mix bus with the added warmth and fatness only custom transformers can supply, the Heritage Audio SUCCESSOR is designed to live permanently hooked up to your Mix or instrument busses and make your mixes shine. Now vocals stand out in the mix without being overwhelming or mudding out your guitars or other instruments. Unlike vintage diode bridge designs, the HA SUCCESSOR has a range of attack and release times that goes from ultra-fast, FET like values, to very slow, VCA like gentle timings, making this unit arguably the most versatile bus compressor up to date. As always, experimentation will help you to learn exactly how this beast of a compressor will respond and we highly recommend it. But just to get you going here are some ideas to keep in mind… Playing around with ATTACK and RELEASE will change the sound A LOT. Very fast attack times will eat up transients and may make your sounds less punchy but more detailed at the same time. While a slower ATTACK combined with a quicker RELEASE will help accentuate the transients and make your sounds jump. BLEND Control can help you restore punchiness to your sounds. When you´ve applied a heavy amount of compression you can sometimes lose the definition of your sounds. Simply mixing in a bit of the DRY signal can really help out. CAUTION: Very Fast ATTACK and RELEASE times along with heavy amounts of compression may make your music unusable due to the unit self-oscillating. This depends on the program and its frequency content. Any artifacts caused by excess of compression at fast timings are not a sign of a defective unit, but a sign of misuse (or intentional creativity!). The sidechain filter is another control that can have dramatic results in your music. High Pass filter at 80 Hz makes bass heavy sounds such as kick drum not to dominate the compression. 160 Hz does so with Kick and Snare. 800 Hz boost allows to moderate mixes with too much lo mid content on them (such is the case when snare drum is too loud in the mix or a honky vocal is dominating). 3 kHz boost does the same with too loud vocals or fuzzy guitars. 5 kHz lo pass allows you to almost de-ess the mix when cymbals are too loud or shrieky. Heritage Audio 457623 Stereo Bus
Compressor - 2

GETTING STARTED

FRONT

REAR

APPLICATIONS

BASS RECORDING

GUITAR RECORDING

MIXING DAW

MIXING MIXBUS

SIDECHAIN

SPECIFICATIONS

Maximum input level: Over +22 dBu.
Maximum output level: Over +26 dBu into 600 Ω.
Self Noise: Less than -75 dBu.
THD+N (50 Hz – 20 kHz): DYNAMIC IN not engaged, less than 0.07% at +20 dBu.
Frequency response: ± 0.5dB, 15 Hz- 30 kHz.
Input impedance: 10 KΩ, transformer balanced and floating.
Output impedance: Less than 75 Ω, transformer balanced and floating, Class A driven.
Dimensions (W x H x L): 482mm x 44mm (1 Rack unit) x 185mm.
Weight: 3.380 Kg.

SIGNAL FLOW

TROUBLE SHOOTING

PROBLEMS	SOLUTIONS
There is almost no sound coming from the SUCCESSOR.	Make sure you have raised

the GAIN MAKE-UP to a sufficient level to recover from any gain reduction taking place.
There doesn t́ seem to be any compression occuring.| Make sure you have adjusted the THRESHOLD level to a reasonable setting as well as selecting an appropriate RATIO for the signal.
I ḿ getting way too much compression for what I need and it´s too aggressive.| Try adjusting the THRESHOLD and/or RATIO to alter the amount and/or intensity of the compression.
I ḿ still getting way too much compression for what I need.| Try adjusting the SC FILTER to make the SUCCESSOR less sensitive to the lower frequencies.
The compression I am getting is still altogether too aggressive for what I am looking for.| Try different settings on the ATTACK and RELEASE

controls to soften the effect.

The readings on the VU meter don t́ seem to correspond with what is actually happening.| Sounds like it ś time for some calibrating.
The is no compression happening.| Make sure you have pressed the ´ DYNAMICS IN ´ button.
I need to do some very special frequency dependent compression.| Push the ´ EXT SIDECHAIN ´ button and make sure you have connected a (e.g., graphic equalizer) and adjusted it accordingly.
There seems to be no compression happening in spite of the drastic settings I´ve chosen.| Check to see if you have left the BLEND control all the way CCW, in the DRY position.
I´m having trouble determining the correct RELEASE time for the material I’m processing.| Try the automatic release times A1 and/or A2.

WARRANTY STATEMENT

LIMITED 2 YEAR WARRANTY
Heritage Audio SUCCESSOR 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 Heritage Audio 457623 Stereo Bus Compressor - 12