Sonnet Echo Express SE I Thunderbolt Expansion System
- Thunderbolt 3 Interface
- 2 x Thunderbolt 3 (USB Type-C) Ports
- 1 x PCIe 3.0 x8 Slot
- Supports Full-Height, Half-Length Cards
- Temperature-Controlled Fan
- Thunderbolt Cable & ThunderLok Included
Echo Express SE I
1-slot Desktop Thunderbolt to PCIe Card Expansion System for Computers with Thunderbolt 4 or Thunderbolt 3 Ports
Connect One Full-height, Half-length+ PCIe Card (Plus Daughter Card)
The processing power offered by Mac, Windows, and Linux computers with Thunderbolt™ ports is truly impressive for today’s creative professionals. However, these sleek, thin devices come with a drawback: they lack PCIe expansion slots for adding cards that boost connectivity and processing capabilities. Sonnet offers the ideal solution with the Echo™ Express SE I Thunderbolt Expansion System. This compact, one-slot system allows you to easily connect a single PCIe card to your computer. Using a single Thunderbolt cable, it’s compatible with Apple M series Macs or Intel Macs with Thunderbolt 3 ports, as well as Windows or Linux computers with Thunderbolt 5 or Thunderbolt 4 ports.
The Thunderbolt Interface Connection
Professional Desktop PCIe Card Expansion – when connected to one of your computer’s Thunderbolt ports, Echo Express SE I allows you to connect a single professional PCIe card — such as a video capture device, audio interface, SAS or SATA host bus adapter, Fibre Channel, Ethernet, or RAID controller — along with a daughter card.
Nearly Every Thunderbolt-Compatible, Non-GPU PCIe Card Supported
Designed to accommodate cards up to 7.75 inches long and measuring a compact 5.6 inches wide by 8.6 inches long by 3.5 inches tall, Echo Express SE I has a small footprint, yet it is large enough to support nearly every Thunderbolt compatible PCIe 4.0, 3.0, PCIe 2.0, and PCIe 1.1 card available. Do you have a card in mind but aren’t sure it’s compatible? We’ve put together a compatibility list that identifies cards conforming to Thunderbolt technology requirements, and organized by fit and power compatibility with specific expansion systems.
All Around Smart Design
Aluminum Enclosure. Auto Power On/Off.

One PCIe 3.0 Slot and Space for a Daughter Card
Echo Express SE I features an x8 PCIe slot, and supports one half-length+, full-height, single- or double-width PCIe card. Double-width? Some pro video and audio interface cards, such as Blackmagic Design’s DeckLink 4K Extreme, and RME’s HDSPe MADI FX card, include a daughter card that mates with and provides additional external connections to the main card. The daughter card occupies the adjacent space without filling a PCIe slot.
Quiet Please

Secure Connections for High Performance
Thunderbolt Cable and ThunderLok Included


Thunderbolt Technology
Fastest External Interface Available
Sonnet Thunderbolt products feature a high-speed Thunderbolt interface that delivers PCIe bandwidth needed to support data transfers at full speed.
Designed for the Fastest Connection to Thunderbolt Computers

Weight | 1.18 kg |
---|---|
Dimensions | 21.8 × 14.2 × 8.9 cm |
Inputs/Outputs |
2x USB-C (Thunderbolt 3) |
OS Compatibility |
Windows 11 (64-Bit Only) Windows 10 (64-Bit Only) macOS 10.12.6 or Later Linux 5.4 or Later |
System Connection |
Thunderbolt 3 |
Expansion Slots |
1x PCIe 3.0 x8 (x4 mode) |
Supported PCI Card Sizes |
Full-Height, Half-Length, Single-Width |
Maximum GPU Length |
7.75" / 19.68 cm |
Power Source Type |
60 W External Adapter |
Input Power |
100 to 240 VAC, 50 / 60 Hz at 1.8 A |