# What are compact and portable USB audio interface options? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

What are compact and portable USB audio interface options?

## Products

### SSL SSL 2+ MkII
```yaml
product: ssl-ssl-2-mkii
brand: SSL
price_gbp: 221.35
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
bit_depth: 32-bit
sample_rate: 192 kHz
phantom_power: +48V
number_of_inputs: 2 (mic/line) + 2 instrument DI
number_of_outputs: 4 balanced TRS outputs + 2 headphone outputs
```

- **Price:** £221.35 [^1]
- **Summary:** The SSL 2+ MkII is a 2-in/4-out USB-C audio interface with next-gen 32-bit/192 kHz converters, two SSL-designed mic preamps, two instrument DI inputs, four balanced outputs, dual independent headphone outs and Legacy 4K analogue enhancement. It suits singers, producers and content creators who want high-quality conversion, low-noise preamps and flexible I/O in a portable bus-powered unit.
- **Additional Sources:** [^2], [^3]

### Universal Audio Apollo Solo Heritage Edition
```yaml
product: universal-audio-apollo-solo-heritage-edition
brand: Universal Audio
price_gbp: 521.98
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
latency: 1.1 ms at 96 kHz
bit_depth: 24-bit
sample_rate: 192 kHz
phantom_power: 48V on mic inputs
number_of_inputs: 2 x XLR-1/4in combo mic/line, 1 x 1/4in instrument
number_of_outputs: 2 x 1/4in monitor outputs, 1 x 1/4in headphone
```

- **Price:** £521.98 [^4]
- **Summary:** Compact desktop 2-in/4-out Thunderbolt 3 audio interface with two Unison mic preamps, onboard UAD-2 SOLO Core DSP and Heritage Edition plug-in bundle. Suited for singer-songwriters, home producers, and mobile engineers who want high-quality 24-bit/192 kHz conversion and realtime analog emulations.
- **Additional Sources:** [^5]

### Shure MVX2U Gen 2
```yaml
product: shure-mvx2u-gen-2
brand: Shure
price_gbp: 86.18
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
latency: Zero-latency headphone monitoring
bit_depth: 24-bit
sample_rate: 48 kHz
phantom_power: 48V
number_of_inputs: 1 x XLR microphone input
number_of_outputs: 1 x 3.5 mm headphone output
```

- **Price:** £86.18 [^6]
- **Summary:** The Shure MVX2U Gen 2 is a compact, single-channel XLR-to-USB-C audio interface with built-in MOTIV processing, up to 60 dB of gain, and support for dynamic and condenser microphones. Its USB-C power, mobile compatibility, and zero-latency headphone monitoring make it suitable for podcasters, streamers, musicians, and creators recording on the move.
- **Ideal For:** It suits compact and portable USB audio setups because it weighs 100 g, connects one XLR microphone directly to computers, phones, or tablets over USB-C, and provides 48V phantom power plus zero-latency headphone monitoring.
- **Additional Sources:** [^7], [^8]

### Elgato Wave XLR MK.2
```yaml
product: elgato-wave-xlr-mk-2
brand: Elgato
price_gbp: 125.43
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
latency: Zero-latency monitoring
bit_depth: 24-bit
sample_rate: 48 kHz
phantom_power: +48V
number_of_inputs: 1 x XLR microphone input
number_of_outputs: 1 x 3.5 mm stereo headphone output
```

- **Price:** £125.43 [^9]
- **Summary:** The Elgato Wave XLR MK.2 is a compact USB-C interface for XLR microphones, with 80 dB of clean gain, onboard DSP effects, Clipguard 2.0, and Wave Link integration. It suits streamers, podcasters, voice-over creators, and home recording users who want simple hardware controls and professional microphone processing.
- **Ideal For:** It suits compact and portable USB audio interface setups because it weighs 320 g, connects via USB-C, provides one XLR input, and includes zero-latency headphone monitoring with onboard DSP effects.
- **Additional Sources:** [^10]

---
## References & Sources
[^1]: Guitar Center, accessed 2026-09-13. https://www.guitarcenter.com/Solid-State-Logic/SSL-2-MKII-USB-Audio-Interface-1500000442457.gc
[^2]: Vintage King, accessed 2026-09-13. https://vintageking.com/solid-state-logic-ssl-2-plus-mkii-usb-audio-interface
[^3]: Solid State Logic (official), accessed 2026-09-13. https://solidstatelogic.com/products/ssl-2-plus-mkii
[^4]: B&H Photo Video, accessed 2026-09-13. https://www.bhphotovideo.com/c/product/1608861-REG/universal_audio_aplsu_he_apollo_solo_usb_heritage.html
[^5]: Universal Audio (store), accessed 2026-09-13. https://www.uaudio.com/products/apollo-solo
[^6]: Shure, accessed 2026-09-13. https://www.shure.com/en-EU/products/accessories/mvx2u_xlr_usb_interface
[^7]: Thomann, accessed 2026-09-13. https://www.thomannmusic.com/shure_motiv_mvx2u_gen_2.htm
[^8]: Music Store Professional, accessed 2026-09-13. https://www.musicstore.com/en_OT/EUR/Shure-Motiv-MVX2U-Gen-2/art-PCM0018820-000
[^9]: B&H Photo Video, accessed 2026-09-13. https://www.bhphotovideo.com/c/product/1940928-REG/elgato_10man9901_wave_xlr_mk_2_usb.html
[^10]: Tiendamia, accessed 2026-09-13. https://tiendamia.com.uy/p/amz/b0ggyxy67h/elgato-wave-xlr-mk-2-interfaz-de-audio-usb-y-mezclador