In other words, by adjusting the physical controls on your Apollo X4, you are virtually interacting with the chosen modeled preamp. Unison offers bidirectional communication between Apollo X4’s mic preamp and a Unison-capable plug-in.

When you switch between the emulations, the plug-in adjusts the preamp circuit itself, affecting parameters such as analog gain structure and impedance. This allows you to track using precise preamp emulations of legendary gear from a variety of brands, including Neve, API, Avalon, and Manley. Apollo X4’s four preamps feature Unison technology. Preamps are the next most important part, and you’ll find the preamps on the Apollo X4 are more than capable of standing in for a dedicated instrument or mic pre. Apollo X4’s A/D conversion captures audio in 24 bit, 192 kHz quality giving you 127dB of dynamic range, for superior signal quality. With the hardware, let’s start with arguably the most important components for determining the sound quality of an audio interface – the converters. But I’m leaving software for later, as there is just so much to talk about in that area. Just the included UAD Powered plug-ins alone are worth the price of admission. That is because the level of quality and amount of features you get in this interface is simply staggering. To say that the UAD Apollo X4 Heritage Edition interface is loaded with features may be quite an understatement. But for many, the most attractive aspect of the Apollo X4 Heritage Edition (and of all modern UA interfaces) is that you get access to their incredible UAD plug-in collections. It is ideal for your home or project studio as it does not take up much space, yet allows you to get high quality digital recordings. To state it in simple terms, the Apollo X4 Heritage Edition is a standout choice for so many reasons and has a stellar cost-benefit ratio. These plugins emulate the sound of legendary analog gear from many distinguished brands with impressive detail and accuracy. It comes with all the quality features that only a company with the tradition and reputation of Universal Audio can offer.īesides offering superior sound, fantastic AD/DA conversion and sample rate, I/O options, and other standout features, the Apollo X4 Heritage Edition also comes bundled with some of the best sounding plug-ins in history – and a processor that’s powerful enough to handle them all. The UAD Apollo X4 is an audio interface designed especially for project studios.

Realtime analog classics plus bundle