A tiny USB interface with both analog and digital connections. The ESI U24 XL is a compact 24-bit USB audio interface for PC and Mac. It gives you 2 analog inputs and outputs on TRS jacks plus S/PDIF digital in and out, in a box about the size of your palm.
Why customers choose it
Who it is for
Home recordists, DJs and laptop musicians who need clean line-level recording and playback, people who want to move audio digitally over S/PDIF, and anyone who needs a small interface for travel.
Specifications
| Type | USB audio interface |
|---|---|
| Inputs | 2 x analog 1/4-inch TRS |
| Outputs | 2 x analog 1/4-inch TRS (one usable as headphone output) |
| Digital I/O | S/PDIF in and out, optical (Toslink) and coaxial (RCA) |
| Resolution | 24-bit AD/DA |
| Connectivity | USB |
| Monitoring | Realtime input monitoring |
| Drivers | ASIO 2.0 (Windows), Core Audio (Mac) |
| Compatibility | Windows 11/10/8.1/8/7/Vista/XP, Mac OS X 10.4 and higher |
| Dimensions | About 10 x 9 cm |
Good to know
- The inputs are line-level TRS jacks; there is no XLR microphone preamp, so a microphone needs an external preamp or mixer.
- ESI lists Steinberg Cubasis LE as usable on iPhone and iPad with the U24 XL.
- ESI notes the bundled software can differ by production date; the retail box shows what is included.
FAQ
Can I plug a microphone straight in?
No. The U24 XL has line-level TRS inputs only. Use a mic preamp or mixer in front of it.
What is S/PDIF used for?
It carries digital stereo audio. You can connect digital mixers, preamps, CD/media players or other gear with optical or coaxial S/PDIF.
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