An eight-preamp audio interface lets you record a drum kit, a small band or a podcast table with every microphone on its own track. The jump from a two-input unit is large, so it pays to compare input counts, outputs and digital expansion before you buy.
The six interfaces below all list eight microphone preamps or inputs. Specs come from each listing page, and sound claims are the makers’ own. We have not used these interfaces ourselves, and a few listings disagree with themselves, which we flag in the text.
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What to Look For
| Feature | Why it matters |
|---|---|
| Preamps | Eight mic preamps record eight microphones at once |
| Line and Hi-Z inputs | Extra inputs for synths, guitars and outboard gear |
| ADAT and S/PDIF | Digital ports add channels from another unit |
| Sample rate | 192 kHz models give headroom; 96 kHz is common |
| Format | Rack width needs a rack or a wide desk |
Specs at a Glance
| Interface | I/O (maker) | Preamps | Notes |
|---|---|---|---|
| Behringer UMC1820 | 18 in, 20 out; USB 2.0 | 8 Midas | ADAT I/O; 24-bit/96 kHz in bullets |
| Fender Quantum LT 16 | 16 in, 8 out; USB-C | 8 MAX-HD, up to 75 dB | 14 line inputs; loopback; 192 kHz |
| Focusrite Scarlett 18i20 | 18 in, 20 out; USB-C | 8, 69 dB gain | ADAT, S/PDIF, MIDI, Word Clock |
| Tascam US-16×08 | 16 in, 8 out; USB | 8 Ultra-HDDA, up to 56 dB | Rackmount; DSP mixer with EQ |
| PreSonus Quantum HD 8 | 26 x 30; USB-C | 8 MAX-HD, up to 75 dB | 32-bit/192 kHz; 19 in wide |
| Focusrite Clarett+ 8Pre | 18 in, 20 out; USB-C | 8 with Air Premium | Optical input; two headphone outputs |
The 6 Best 8-Channel Audio Interfaces
1. Behringer UMC1820 18×20 USB Interface
An 18-input, 20-output USB 2.0 interface with eight Midas-designed mic preamps with 48V phantom power and ADAT I/O. The bullets claim 24-bit/96 kHz and support for Mac and Windows, but the detail table lists a 48 kHz maximum, a Mac-only OS and a 24.35 inch width, so check those points. It is listed at 4 pounds.
Suits: a drum-kit setup with ADAT growth. Strengths: eight preamps and ADAT. Weaknesses: inconsistent sample-rate data. Skip it if you need 192 kHz.
View Behringer UMC1820 18×20 USB Audio Interface on Amazon
2. Fender Quantum LT 16 USB-C Interface
A 16-in, 8-out USB-C interface in a 19-inch wide, 1.75-inch tall body weighing 4.8 pounds. It lists eight MAX-HD preamps with up to 75 dB of gain, fourteen line inputs (six front combo XLR/TRS plus eight rear), loopback and a 192 kHz maximum. Registering it unlocks the Fender Studio app. The detail table says 14 channels while the title says 16 inputs.
Suits: a hybrid studio with outboard gear. Strengths: a lot of line inputs and 75 dB of gain. Weaknesses: only 8 outputs. Skip it if you need more outputs.
View Fender Quantum LT 16 USB-C Audio Interface on Amazon
3. Focusrite Scarlett 18i20 4th Gen Interface
An 18-in, 20-out USB-C interface with eight mic preamps at 69 dB of gain, two Hi-Z inputs, eight line inputs, ADAT, S/PDIF, MIDI I/O and Word Clock. Focusrite lists 24-bit/192 kHz converters with a 122 dB dynamic range, Air modes and Auto Gain for quick levels.
Suits: a larger recording rig. Strengths: a full set of digital ports. Weaknesses: 69 dB is lower than some rivals. Skip it if you need more gain.
View Focusrite Scarlett 18i20 4th Gen Interface on Amazon
4. Tascam US-16×08 Rackmount Interface
A rackmount USB interface capturing 16 inputs: eight XLR mic preamps (up to 56 dB of gain) and eight line inputs, two switchable for guitar or bass, with eight balanced outputs. A DSP mixer provides four-band EQ and compression per channel. It lists 96 kHz and measures 11.34 by 22.09 by 5.04 inches at 6.1 pounds. The listing names Windows as the OS, so check Mac support with the maker.
Suits: drum recording with a built-in mixer. Strengths: a DSP mixer. Weaknesses: 96 kHz maximum and OS data. Skip it if you need USB-C.
View Tascam US-16×08 Rackmount USB Audio Interface on Amazon
5. PreSonus Quantum HD 8 USB-C Interface
A 26-in, 30-out USB-C interface with eight MAX-HD preamps (up to 75 dB of gain), a Fender-co-developed instrument input and 32-bit/192 kHz converters. It lists 8.6 by 19 by 1.7 inches and 6.3 pounds and includes Fender Studio Pro software.
Suits: a large track count. Strengths: 26 inputs and 30 outputs. Weaknesses: the listing has no OS detail. Skip it if you want a small desktop unit.
View PreSonus Quantum HD 8 USB-C Audio Interface on Amazon
6. Focusrite Clarett+ 8Pre USB-C Interface
An 18-in, 20-out USB-C interface with eight Clarett+ preamps, all-analogue Air Premium modeled on the ISA 110 (a 4 dB high-frequency boost), upgraded A-D and D-A converters and two headphone outputs. The listing shows XLR, 1/4-inch TRS and optical inputs and a 192 kHz maximum.
Suits: vocals and acoustic sources. Strengths: Air Premium and two headphone outputs. Weaknesses: the listed size is cut off. Skip it if you need a software-heavy bundle.
View Focusrite Clarett+ 8Pre USB-C Audio Interface on Amazon
Setup Notes
- Install the maker’s driver before connecting.
- Plan for rack space or a wide desk.
- Set the sample rate and buffer in your recording software.
- Label each channel when you mic a drum kit.
Mistakes to Avoid
- Counting inputs without counting mic preamps.
- Forgetting XLR cables for every microphone.
- Trusting a sample rate that the listing states two ways.
- Ignoring outputs when you need several headphone mixes.
8-Channel Interface FAQ
Do I need ADAT?
Only if you want to add more preamps later through a second unit.
USB or USB-C?
The Behringer lists USB 2.0 and the Tascam lists USB, and the rest list USB-C.
The Short Version
For ADAT growth, the Behringer UMC1820. For line inputs, the Fender Quantum LT 16. For a full set of digital ports, the Scarlett 18i20. For a built-in mixer, the Tascam. For a high track count, the PreSonus Quantum HD 8. For vocal character, the Clarett+ 8Pre.
