# What are the best professional-grade Thunderbolt audio interfaces? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

What are the best professional-grade Thunderbolt audio interfaces?

## Products

### Universal Audio Apollo x8p
```yaml
product: universal-audio-apollo-x8p
brand: Universal Audio
price_gbp: 2286.75
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
bit_depth: 24 bit
i_o_count: 16 in / 22 out
sample_rate: 192 kHz
power_supply: External power supply
number_of_channels: 8
thunderbolt_version: Thunderbolt 3
```

- **Price:** £2286.75 [^1]
- **Summary:** The Universal Audio Apollo x8p is a professional rackmount Thunderbolt audio interface with eight Unison mic preamps, 16 x 22 I/O, 24-bit / 192 kHz conversion, and HEXA Core DSP for real-time UAD plug-in processing. It suits recording engineers, producers, and professional studios tracking large ensembles or full-band sessions.
- **Ideal For:** It suits professional-grade Thunderbolt audio interface users who need eight Unison preamps, 16 x 22 I/O, 24-bit / 192 kHz conversion, and near-zero-latency UAD processing for large recording sessions.
- **Additional Sources:** [^2], [^3]

### Universal Audio Apollo x4 Gen 2 Thunderbolt Audio Interface - UAD Analog Classics Edition
```yaml
product: universal-audio-apollo-x4-gen-2-thunderbolt-audio-interface-uad-analog-classics-edition
brand: Universal Audio
price_gbp: 1147.43
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
bit_depth: 24 bit
i_o_count: 12 x 18
sample_rate: 192 kHz
power_supply: External power supply
number_of_channels: 12 x 18
thunderbolt_version: Thunderbolt 3
```

- **Price:** £1147.43 [^4]
- **Summary:** The Apollo x4 Gen 2 is a professional desktop Thunderbolt audio interface with four Unison microphone preamps, 24-bit/192 kHz conversion, Quad Core DSP, and real-time UAD plug-in processing. It suits producers, engineers, and musicians who need high-quality recording, monitoring, and expandable studio connectivity.
- **Ideal For:** It suits professional-grade Thunderbolt audio interface users because it combines 12 x 18 recording and playback channels, four Unison preamps, 24-bit/192 kHz conversion, Thunderbolt 3 connectivity, and onboard Quad Core DSP for near-zero-latency UAD processing.
- **Additional Sources:** [^5]

### Universal Audio Apollo x16D Thunderbolt Audio Interface with Dante - UAD Analog Classics Edition
```yaml
product: universal-audio-apollo-x16d-thunderbolt-audio-interface-with-dante-uad-analog-classics-edition
brand: Universal Audio
price_gbp: 2050.62
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
latency: 0.25 ms, 0.5 ms, 1.0 ms, 2.0 ms, 5.0 ms
bit_depth: 24-bit
i_o_count: 18 x 20
sample_rate: 192 kHz
power_supply: External AC-to-DC
number_of_channels: 16
thunderbolt_version: Thunderbolt 3
```

- **Price:** £2050.62 [^6]
- **Summary:** The Apollo x16D is a rackmount Thunderbolt 3 interface with 18 x 20 audio I/O, 16 x 16 Dante networking, 24-bit/192 kHz conversion, and HEXA Core UAD processing. It suits professional studios, live sound venues, broadcast facilities, and immersive audio systems that need low-latency plug-in processing and scalable networked audio.
- **Ideal For:** It is a strong professional-grade Thunderbolt interface choice because it combines 18 x 20 I/O, 24-bit/192 kHz conversion, Thunderbolt 3, 16-channel Dante networking, selectable Dante latency down to 0.25 ms, and scalable support for up to 64 networked channels.

### Universal Audio Apollo x8p Gen 2 Thunderbolt Audio Interface - UAD Analog Classics Edition
```yaml
product: universal-audio-apollo-x8p-gen-2-thunderbolt-audio-interface-uad-analog-classics-edition
brand: Universal Audio
price_gbp: 2316.27
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
latency: 1.1 ms at 96 kHz
bit_depth: 24-bit
i_o_count: 16-in / 22-out
sample_rate: 192 kHz
power_supply: 12 VDC at 6 A
number_of_channels: 16
thunderbolt_version: Thunderbolt 3
```

- **Price:** £2316.27 [^1]
- **Summary:** The Apollo x8p Gen 2 is a professional rackmount Thunderbolt audio interface with eight Unison mic preamps, 16-in / 22-out connectivity, 24-bit / 192 kHz conversion, and HEXA Core DSP for near-zero-latency UAD plug-in processing. It suits recording studios, producers, engineers, and bands handling large sessions that need high channel counts and real-time analog-style processing.
- **Ideal For:** It suits professional-grade Thunderbolt audio interface needs with 16-in / 22-out connectivity, eight Unison preamps, 24-bit / 192 kHz conversion, Thunderbolt 3, and near-zero-latency HEXA Core UAD processing.
- **Additional Sources:** [^7], [^8]

### Universal Audio Apollo x6 Gen 2 Thunderbolt Audio Interface - UAD Analog Classics Pro Edition
```yaml
product: universal-audio-apollo-x6-gen-2-thunderbolt-audio-interface-uad-analog-classics-pro-edition
brand: Universal Audio
price_gbp: 2670.46
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
bit_depth: 24 bit
i_o_count: 16 in / 22 out
sample_rate: 192 kHz
power_supply: 12V DC
thunderbolt_version: 3
```

- **Price:** £2670.46 [^9]
- **Summary:** The Apollo x6 Gen 2 is a rackmount Thunderbolt 3 interface with 16 inputs, 22 outputs, two Unison mic preamps, HEXA Core DSP, and high-resolution 24-bit/192 kHz conversion. It suits professional producers, recording engineers, and project studios needing premium monitoring, real-time UAD processing, and flexible surround-capable connectivity.
- **Ideal For:** It suits professional-grade Thunderbolt interface needs with 16x22 I/O, 24-bit/192 kHz conversion, Thunderbolt 3 connectivity, two Unison preamps, and HEXA Core DSP for near-zero-latency UAD plug-in tracking.

### Universal Audio Apollo x16 Gen 2 Thunderbolt Audio Interface - UAD Analog Classics Edition
```yaml
product: universal-audio-apollo-x16-gen-2-thunderbolt-audio-interface-uad-analog-classics-edition
brand: Universal Audio
price_gbp: 2877.07
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
bit_depth: 24 bit
i_o_count: 18 in / 20 out
sample_rate: 192 kHz
power_supply: 12V DC
number_of_channels: 16
thunderbolt_version: 3
```

- **Price:** £2877.07 [^10]
- **Summary:** The Apollo x16 Gen 2 is a professional rackmount interface with 16 x 16 analog line I/O, 24-bit 192 kHz conversion, Thunderbolt 3 connectivity, and HEXA Core DSP for near-zero-latency UAD plug-in processing. It suits professional recording, mixing, postproduction, and immersive audio studios that need extensive connectivity and high-resolution monitoring.
- **Ideal For:** It suits professional-grade Thunderbolt audio interface needs with 16 channels of analog I/O, 24-bit 192 kHz conversion, Thunderbolt 3, HEXA Core DSP, and immersive audio support up to 9.1.6.
- **Additional Sources:** [^11]

### Apogee Digital Symphony I/O MKII Thunderbolt 3 Interface with Two 16x16SE I/O Modules
```yaml
product: apogee-digital-symphony-i-o-mkii-thunderbolt-3-interface-with-two-16x16se-i-o-modules
brand: Apogee Digital
price_gbp: 7747.21
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
bit_depth: 24-bit
i_o_count: 64
sample_rate: 192 kHz
power_supply: 150 W 90 to 240 VAC 50/60 Hz
number_of_channels: 32
thunderbolt_version: Thunderbolt 3
```

- **Price:** £7747.21 [^12]
- **Summary:** This modular Symphony I/O MKII Thunderbolt 3 system ships with two 16x16SE I/O modules, giving 32x32 analog audio plus coaxial S/PDIF I/O. It uses a touchscreen-controlled Thunderbolt 3 chassis for studio monitoring and routing in a professional Mac-based workflow. It is aimed at Dolby Atmos and immersive-audio capable studios that need high channel counts in a single Thunderbolt interface.
- **Ideal For:** For professional-grade Thunderbolt audio interfaces, this model's Thunderbolt 3 chassis plus two 16x16SE modules provide 32x32 analog I/O with 24-bit conversion up to 192 kHz, fitting the high-channel, high-resolution needs of mix and mastering workflows.
- **Additional Sources:** [^13], [^14]

### RME Fireface 802 FS AE USB 2.0 Audio Interface - Black Anniversary Edition
```yaml
product: rme-fireface-802-fs-ae-usb-2-0-audio-interface-black-anniversary-edition
brand: RME
price_gbp: 1147.43
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
bit_depth: 24 bit
i_o_count: 60
sample_rate: 28 kHz-200 kHz
power_supply: 100-240V AC, 30W
number_of_channels: 60
```

- **Price:** £1147.43 [^15]
- **Summary:** The RME Fireface 802 FS AE is a 60-channel professional USB 2.0 interface with operation up to 192 kHz and a built-in TotalMix FX DSP mixer for latency-free routing and monitoring. It includes multiple analog and digital I/O (including ADAT, AES/EBU, and S/PDIF) plus DC-coupled analog outputs for CV/gate control. It suits studios and live setups that need stable, high-channel-count audio with advanced internal DSP mixing.
- **Ideal For:** For best professional-grade Thunderbolt interfaces, this model is still a top option when you need ultra-low latency monitoring and 60-channel, 24-bit up to 192 kHz operation with onboard DSP (TotalMix FX), but it is USB 2.0 rather than Thunderbolt.
- **Additional Sources:** [^16], [^17]

### Universal Audio Apollo x6
```yaml
product: universal-audio-apollo-x6
brand: Universal Audio
price_gbp: 1622.64
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
latency: 1.1 ms at 96 kHz input to output
bit_depth: 24-bit
i_o_count: 16 in / 22 out
sample_rate: Up to 192 kHz
power_supply: External 12 VDC at 6 A power supply included
number_of_channels: 16 inputs / 22 outputs
thunderbolt_version: 3
```

- **Price:** £1622.64 [^18]
- **Summary:** The Universal Audio Apollo x6 is a rackmount Thunderbolt 3 audio interface with 16 inputs, 22 outputs, two Unison mic preamps, and HEXA Core DSP for real-time UAD plug-in processing. Its 24-bit / 192 kHz conversion, surround monitoring support, ADAT and S/PDIF connectivity, and external power supply suit professional studios, producers, and engineers using outboard gear.
- **Ideal For:** It suits professional-grade Thunderbolt audio interface users with 16 x 22 I/O, 24-bit / 192 kHz conversion, Thunderbolt 3 connectivity, two Unison preamps, and HEXA Core DSP for near-zero-latency UAD processing.
- **Additional Sources:** [^19], [^20]

### Universal Audio Apollo x8
```yaml
product: universal-audio-apollo-x8
brand: Universal Audio
price_gbp: 1844.01
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
latency: 1.1 ms at 96 kHz input to output
bit_depth: 24-bit
i_o_count: 18 in / 24 out
sample_rate: Up to 192 kHz
power_supply: External power supply
number_of_channels: 18 x 24 simultaneous
thunderbolt_version: Thunderbolt 3
```

- **Price:** £1844.01 [^21]
- **Summary:** The Universal Audio Apollo x8 is a professional rackmount Thunderbolt audio interface with four Unison mic preamps, extensive analog and digital I/O, and onboard HEXA Core DSP for real-time UAD plug-in processing. Its high-resolution 24-bit, 192 kHz conversion and surround monitoring support make it well suited to serious project studios and commercial production environments.
- **Ideal For:** It suits professional-grade Thunderbolt audio interface needs with 18 x 24 simultaneous channels, Thunderbolt 3 connectivity, four Unison preamps, 24-bit 192 kHz conversion, and onboard HEXA Core DSP for near-zero-latency UAD processing.
- **Additional Sources:** [^22]

---
## References & Sources
[^1]: B&H Photo Video, accessed 2026-09-13. https://www.bhphotovideo.com/c/product/1852570-REG/universal_audio_apx8pg2_ess_apollo_x8p_gen_2.html
[^2]: Guitar Center, accessed 2026-09-13. https://www.guitarcenter.com/Universal-Audio/Apollo-x8p-Gen-2-Audio-Interface-With-UAD-Analog-Classics-Pro-1500000489526.gc
[^3]: Thomann, accessed 2026-09-13. https://www.thomannmusic.com/universal_audio_apollo_x8p_gen2_studio.htm
[^4]: Thomann, accessed 2026-09-13. https://www.thomannmusic.com/universal_audio_apollo_x4_gen2_essentials.htm
[^5]: Retro Knob, accessed 2026-09-13. https://retroknob.com/universal-audio-apollo-x4-gen-2-analog-classics/
[^6]: KMR Audio, accessed 2026-09-13. https://kmraudio.com/products/universal-audio-apollo-x16d-essentials-edition
[^7]: Victory Musical Instruments, accessed 2026-09-13. https://www.victorymusical.com/products/apollo-x8p-gen-2-ess-rack-tb3-mac-win
[^8]: StrumentiMusicali.net, accessed 2026-09-13. https://www.strumentimusicali.net/product_info.php/products_id/204571/universal-audio-apollo-x8p-gen-2-ac-analog-classics.html
[^9]: Muziker, accessed 2026-09-13. https://www.muziker.com/universal-audio-apollo-x6-gen-2-studio
[^10]: B&H Photo Video, accessed 2026-09-13. https://www.bhphotovideo.com/c/product/1852562-REG/universal_audio_apx16g2_ess_apollo_x16_gen_2.html
[^11]: Perfect Circuit, accessed 2026-09-13. https://www.perfectcircuit.com/universal-audio-apollo-x16-gen-2-essentials-edition.html
[^12]: B&H Photo Video, accessed 2026-09-13. https://www.bhphotovideo.com/c/product/1944489-REG/apogee_electronics_sym2_32x32se_tb3_tb3_symphony_mkii_32x32.html
[^13]: Front End Audio, accessed 2026-09-13. https://www.frontendaudio.com/apogee-symphony-i-o-mkii-32x32-thunderbolt-3-system/
[^14]: Vintage King, accessed 2026-09-13. https://vintageking.com/apogee-symphony-i-o-mkii-thunderbolt-3-and-pro-tools-hd-plus-interface-with-two-16x16-line-i-o-modules
[^15]: RME Shop (SFB Electronics), accessed 2026-09-13. https://www.rme-shop.com/acatalog/RME---Fireface-802-FS-AE-3673.html
[^16]: rme-usa.com, accessed 2026-09-13. https://www.rme-usa.com/fireface-802-fs-ae.html
[^17]: Thomann, accessed 2026-09-13. https://www.thomannmusic.com/rme_fireface_802_fs_ae.htm
[^18]: B&H Photo Video, accessed 2026-09-13. https://www.bhphotovideo.com/c/product/1852566-REG/universal_audio_apx6g2_ess_apollo_x6_gen_2.html
[^19]: Thomann, accessed 2026-09-13. https://www.thomannmusic.com/universal_audio_apollo_x6_gen2_essentials.htm
[^20]: Melodia Musik, accessed 2026-09-13. https://www.melodiamusik.com/product/universal-audio-apollo-x6-gen-2-thunderbolt-3-audio-interface-with-uad-dsp-essentials/
[^21]: Thomann, accessed 2026-09-13. https://www.thomannmusic.com/universal_audio_apollo_x8_gen2_essentials.htm
[^22]: B&H Photo Video, accessed 2026-09-13. https://www.bhphotovideo.com/c/product/1852569-REG/universal_audio_apx8g2_stu_apollo_x8_gen_2.html