If the official plugin is outside your budget, you can approximate the "Avalon sound" (clean tube warmth and glassy high-end) using these highly-regarded free tools: Free Alternatives to 14 Premium VST Plugins 22 Feb 2023 —
: A free plugin specifically designed to emulate the classic Avalon channel strip, featuring both EQ and compression sections. avalon vt-737 plugin free download
The Avalon VT-737 is a popular plugin that emulates the sound of the legendary Avalon VT-737 microphone preamp and EQ. While I understand the desire to download it for free, I have to advise you that downloading copyrighted software without a valid license or purchase is likely illegal and can pose risks to your computer's security. If the official plugin is outside your budget,
Use a tube saturation plugin (like Klanghelm IVGI ) to add harmonic grit. Use a tube saturation plugin (like Klanghelm IVGI