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PREMIUM COMPONENTS

At the heart of the A4-1B lies an all-analog circuit including premium tubes, custom transformers, and a precise opto-cell detection system that delivers the kind of musical dynamics and rich tone you’re used to hearing from classic optical compressors. The analog signal path is controlled digitally, making it more reliable, accurate, and precise than vintage units, without sacrificing any tone.

ADVANCED FILTERING OPTIONS

Need a little more control over your sound? The A4-1B’s extended filter section includes high-pass, band-pass, and de-essing filters, providing precise control over compression. These user-configurable filters target specific frequencies for sidechain applications and help clean up vocals and instruments with precision, giving you a flexible and powerful tool to craft the sounds in your head.

BRINGING ANALOG INTO THE DIGITAL AGE

The A4-1B also has access to the A4 Analog Automation Control DAW plug-in, available in VST3, AU and AAX formats, offering full integration into your DAW setup. Proprietary motorized potentiometers allow settings to be applied instantly to the hardware, while the preset system ensures easy recall for consistency across sessions and quick A/B testing. Attack, Release, Gain, Threshold, and Ratio can be automated directly from the DAW, just like with any native plugin. The extended filter section includes low pass, high pass, and band pass filters for sidechain applications, and the de-es mode with a narrow band pass filter helps clean up vocals and instruments with precision.

The A4-1B Complete Edition comes with a code for a perpetual license for the A4 plug-in, as well as complimentary 2 years of Synergy Core Native membership, with access to more than 70 critically acclaimed compressors, EQs, reverbs, delays, pitch correction plugins and more.

VINTAGE WARMTH MEETS MODERN PRECISION

The Antelope Audio A4-1B bridges the gap between vintage tube compression and modern workflow, offering rich analog tone with the precision of digital control. With its premium all-analog circuitry, seamless DAW integration, and advanced filtering options, it’s an indispensable tool for producers, engineers, and artists who demand both warmth and flexibility. Whether you’re dialing in smooth vocal compression, tightening up drum transients, or shaping mixbus dynamics with surgical precision, the A4-1B delivers unmatched versatility.

ANTELOPE AUDIO A4-1B COMPLETE EDITION FEATURES:

AUTHENTIC ANALOG SOUND

100% purely analog circuit for the audio signal
High-quality components ensuring superior sonic performance
Custom-designed UK transformers and high-quality tubes
Pre-sorted opto-cell for optimal compression precision
All tube-based push-pull amplifier
Continuously variable attack and release time

AUTOMATED CALIBRATION SYSTEMS

Ensured compression precision over time
Modern power supply for tube longevity and reduced humming
Consistent stereo-link performance via calibration system
Multiple reference levels for metering
VU-meter for monitoring input, compression and output

A4 – ANTELOPE AUDIO ANALOG AUTOMATION (INCLUDED)

Remote control via VST3, AAX or AU plug-in, or standalone control app
Settings instantly applied on hardware via proprietary motorized knobs
Comprehensive file preset system
Automation for attack, release, gain, threshold and ratio via DAW plug-in
Extended filtering section with low pass, high pass and band pass filtering for side chain signal
De-esser mode utilizing narrow band pass filter

About Us

Since 1993, we have been committed to equipping our customers with the very best gear, advice, and personal service anywhere. We believe that great sound can be achieved at any budget. We also believe that the ambitions of our customers should always come first. For us, it's about building long-lasting relationships, not just selling gear. And over the years, those beliefs have turned customers into friends and family. Whether you're just starting out, or a seasoned pro, we're here for you, no matter where your audio travels may take you.

Shipping Policy

Free ground shipping to the lower 48 states Via FedEx. All of our items ship via FedEx. On checkout, it may look like you are selecting a UPS shipping method, but the item will be shipped via the equivalent FedEx method.

Import Duties and Tax

Since import taxes and/or duties that your government might impose on products shipped from the United States may apply, you (the customer), are solely responsible for shipping charges, taxes, and duties, once goods arrive in your country.

Undeliverable/Rejected Package

If your package was rejected by your local Customs Bureau or the shipment could not be delivered and was returned to Vintage King Audio for any reason, we are not responsible for the shipping costs.

Free Extended Warranty

All new items that Vintage King carries are subject to our FREE extended warranty protection. Basically, if the manufacturer offers a 1-year warranty on your product, then you are covered under the same warranty terms for a total of 2 years from the time of initial shipment. Likewise, if the manufacturer offers a 5-year warranty, then you receive a total of 6 years of coverage when purchased through Vintage King. We add 1 year to your standard manufacturer's warranty period, FREE of charge, whatever the manufacturer's warranty period may be.

Duties and tax for warranty and damage replacement items

International Duties and tax for warranty and damage replacement items may apply. Even though you may have paid shipping, taxes or duty on your original order, it is IMPORTANT to understand that your government may impose duties and taxes for warranty items or replacement items damaged during shipment from the United States for the new order. You (the customer), are solely responsible for shipping charges, taxes, and duties, once goods arrive in your country.

Used Item Warranties

Vintage King offers an industry-leading level of technical service and warranty support on our used and vintage items. Our used item warranty periods are as follows:

Analog Outboard Gear – 1 Year
Microphones – 1 Year (excluding capsules, tubes, and ribbon elements)
Speakers – 1 Year (excluding drivers)
Digital Outboard Gear – 30 Days

Return Policy

We do our best to help you choose the perfect gear, but if you don't love it in the first 30 days after receipt, please contact us through eBay for a return authorization.

Note: Software is not returnable or refundable.

What Are "Demo Deal" or "B-Stock" Products?

Our Demo Deals and B-Stock products offer a unique opportunity to save big on near-mint condition, fully warrantied gear. These items have been opened for demonstration purposes and put back in the box without extended use. All original factory accessories and packaging are included.

In addition to the manufacturer's warranty, Demo Deal and B-Stock items also come with an additional 1-year of warranty coverage from Vintage King, free of charge, so rest assured that not only are you saving big by purchasing a Demo Deal/B-Stock item, but you will also receive the same level of world-class support from Vintage King as with the purchase of a factory-sealed unit.

Taxes

Vintage King collects sales tax for shipments to Alabama, Arkansas, Arizona, California, Colorado, Connecticut, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, Nebraska, Nevada, New Jersey, New Mexico, New York, North Carolina, Ohio, Oklahoma, Pennsylvania, South Carolina, Tennessee, Texas, Utah, Vermont, Virginia, Washington, Washington D.C., Wisconsin and Wyoming. Partial and complete tax exemptions may be available in your state. Contact us through eBay for details.

Note: eBay may collect sales tax in states not listed above.