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First Look: Universal Audio Apollo x4

First Look: Universal Audio Apollo x4

The new Apollo x4 from Universal Audio is a huge step up from the company’s previous desktop audio interfaces. If you’ve wanted to step up to an Apollo X but have felt that they are beyond your reach, then the Apollo x4 is exactly what you’ve been waiting for. Upgraded elite-class AD/DA converters ensure top-shelf sound quality, while Thunderbolt 3 technology yields near-zero latency. A powerful QUAD Core processor arms you with spot-on emulations of tried-and-true studio gear, and you can get started right out of the box, thanks to the included Realtime Analog Classics Plus plug-in bundle. The plug-ins aren’t just for mixing, either. The Apollo x4 is outfitted with four Unison preamps, enabling you to track through models of the industry’s most legendary hardware. Featuring a generous amount of I/O, the 16-in/22-out Apollo x4 works with both Mac and PC and is backward compatible with any Mac with a Thunderbolt port.

Hero photo of the Apollo x4

Improved Sound Quality

One of the things our customers noticed about the Apollo X interfaces when they first dropped was their improved sound quality. The x4 sounds just as amazing as its larger, rackmounted brethren — its elite-class, 24-bit/192kHz AD/DA rivals any high-end standalone converter on the market. But that’s not all. Retooled analog circuitry milks every drop of sound out of the converters. With the Apollo x4 at the center of your studio, you can expect your recordings to exhibit the best sound possible.

Secondary photo of the Apollo x4

The Apollo x4 is fast, delivering speeds up to 40 Gbps via blazing-fast Thunderbolt 3 technology, which ensures near-zero latency. You can network up to four Apollos via the interface’s Thunderbolt 3 port, making expansion a breeze. Aggregating multiple Apollo X interfaces together is an easy way to build a fast, high-bandwidth studio rig. Add to that UA’s legendary real-time DSP processing, and you’ve got a seriously enviable studio solution. And you don’t need to upgrade your computer — the x4 is backward compatible with Thunderbolt 1- and 2-equipped Macs, although you’ll need a Thunderbolt 3-to-Thunderbolt adapter (sold separately). (Note: the Apollo x4 does not support Thunderbolt 1 or 2 on Windows).

Unison Preamps

Angle photo of the Apollo x4

Like the other Apollo X audio interfaces, the Apollo x4 boasts Universal Audio’s acclaimed Unison preamps. These preamps are often raved about, and with good reason — they put the sound of legendary studio preamps at your fingertips. They’re not measly digital emulations, either. Unison technology does much more than that, adjusting the preamp circuit itself, shifting its impedance and tweaking its analog gain structure, among other things. These preamps not only duplicate the sound but also the interactive behavior of the original hardware. And since the x4 includes Universal Audio’s Realtime Analog Classics Plus plug-in bundle, you’ll already own a top-tier collection of modeled analog gear without buying a single plug-in.

Flexible I/O

The Universal Audio Apollo x4 features a 16-in/22-out configuration — identical to the rackmount Apollo x6. If you don’t need that much I/O, then the newly updated Apollo Twin X DUO and Apollo Twin X QUAD are also available. Like the x4, these new Twins come loaded with elite-class AD/DA and upgraded analog circuitry, boasting better sound quality and more headroom than their predecessors. If you have any questions about which model is best for you, give your Sales Engineer a call at (800) 222-4700. We’ll be happy to help you out.

Offer applies only to single-receipt qualifying purchases. Select manufacturers may require that only the manufacturer’s products qualify towards the minimum purchase amount needed to be eligible for promotional financing. Otherwise, an invoice that meets the minimum purchase amount and contains at least one qualifying manufacturer product is eligible for promotional financing. No interest will be charged on promo purchase balance, and equal monthly payments are required on promo purchase until it is paid in full. The payments equal the amount financed divided by the number of months in the promo period, rounded up to the next whole dollar. These payments may be higher than the payments that would be required if this purchase was a non-promo purchase. During the last month(s) of the promo period the required monthly payment may be reduced due to the prior months’ rounding. Regular account terms apply to non-promo purchases. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

Offer applies only to single-receipt qualifying purchases. No interest will be charged on the promo balance if you pay it off, in full, within the promo period. If you do not, interest will be charged on the promo balance from the purchase date. The required minimum monthly payments may or may not pay off the promo balance before the end of the promo period, depending on purchase amount, promo length and payment allocation. Regular account terms apply to non-promo purchases and, after promo period ends, to the promo balance. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

The estimated required monthly payment shown which excludes taxes and delivery equals the amount financed divided by the number of months in the promo period, rounded up to the next cent. During the last month(s) of the promo period the required monthly payment may be reduced due to this rounding. These payments apply only with the financing offer shown. If you make these payments by the due date each month, you should pay off this amount financed within the promo period, if it is the only balance you are paying off. If you have other balances on your account, this payment will be added to any other minimum monthly payments.

Applies only to select items from this manufacturer. Ask your Sweetwater Sales Engineer for more details.