Upgradeable to 40Gbps Thunderbolt 3 Icon
Echo Express SEL

Echo Express SEL

1-slot Desktop Thunderbolt 2 Expansion System for Low-profile PCIe Cards

Connect a Low-profile PCIe Card to Computers with Thunderbolt 2 Ports

Ultra-light notebooks, small form factor and all-in-one Mac®, Windows(1), and Linux® computers are slender marvels of engineering that come with a cost—there’s nowhere to install PCIe cards that provide additional connectivity and processing capabilities. Sonnet’s Echo™ Express SEL is a compact, desktop Thunderbolt™ 2 to PCIe card expansion system that fixes that issue, enabling you to connect a low-profile PCIe card to any computer with Thunderbolt 2 ports.

Echo Express SEL with MacBook Pro
PCIe Card Connected to Thunderbolt Computer

Thunderbolt 2 Connectivity

Through its x8 PCIe 2.0 slot, this little expansion system supports many low-profile PCIe cards (including 16Gb and 8Gb Fibre Channel, 10 Gigabit Ethernet, SAS and SATA host bus adapters, and RAID controllers) and connects to your computer through a single Thunderbolt 2 cable.

Key Features

PCIe Card Icon

Connect a Low-profile PCIe Card

Use a high-performance PCIe card with any computer with a Thunderbolt 2 port.

Number 1 Icon

One PCIe 2.0 Slot

Supports one low-profile PCIe card.

20Gpbs Icon

20Gbps Thunderbolt 2 Interface

Full Thunderbolt 2 performance; backward compatible with 10Gbps Thunderbolt.

Performance Icon

Small Package. Full Performance.

Smallest Thunderbolt 2 to PCIe card expansion system available; supports the most popular low-profile, Thunderbolt-compatible PCIe cards at full performance.

Thunderbolt 2 Ports Icon

Two Thunderbolt 2 Ports

One port connects to computer; second port supports daisy-chaining of up to five additional Thunderbolt peripheral devices.

Sound Icon

Remarkably Quiet

Temperature-controlled, variable-speed fan automatically and quietly cools the card.

Energy Saver Icon

Energy Saver Mode

Powers on/off automatically with the computer.

Rugged Icon

Rugged Aluminum Housing

Provides robust and secure protection.

Power Icon

Power for Peripherals

Daisy chain port provides up to 10W of power to connected peripherals.

Free Lifetime Tech Support
Low-profile PCIe Cards

Nearly Every Thunderbolt-Compatible, Low-profile PCIe Card Supported

The Echo Express SEL accommodates a wide variety of PCIe cards. Do you have a card in mind but aren’t sure it’s compatible? We’ve put together a list in our supporting PCIe Card Thunderbolt Compatibility Chart (PDF). There you’ll find cards identified as conforming to Thunderbolt technology requirements, and organized by fit and power compatibility with specific expansion system.

Echo Express SEL Icon

Smart Design, Inside and Out

Aluminum Enclosure. Auto Power On/Off.

Constructed of rugged and lightweight aluminum, Echo Express SEL securely houses the installed PCIe card. Inside, the card is protected through the use of a variable-speed, temperature-controlled fan which ensures the card and chassis’ components remain reliably cool. The internal fan automatically speeds up as necessary to cool the installed card when it’s hot, and slows down when it’s cool. Since Echo Express products automatically power on and off with your computer, there is no power switch on the chassis, ensuring you don’t waste energy by forgetting to turn it off.

Designed for Low-profile PCIe Cards

Echo Express SEL supports one half-length (up to 6.6 inches long), low-profile, single-width PCIe card; PCIe 1.1, PCIe 2.0, and PCIe 3.0 cards are supported.

Echo Express SEL PCIe Card Size Support
Echo Express SEL Interior View

1. PCIe 2.0 x8 slot

Fan Icon

Quiet Please

Echo Express SEL is designed to be ultra-quiet so that it can be comfortably used in noise-sensitive environments. The airflow path within the chassis has been specially designed to enable the temperature-controlled, variable speed fan to quietly and efficiently cool the installed card at all times, even during peak operation.
Thunderbolt 2 Cable with ThunderLok

Included at No Extra Charge

Thunderbolt 2 Cable. ThunderLok.

Sonnet includes a 1-meter Thunderbolt 2 cable and a Sonnet ThunderLok Thunderbolt connector retainer clip(2) to avoid accidental cable disconnections—just slide it over one end of the cable, and then plug in the connector and secure it to the chassis by turning a thumbscrew. Because of its unique design, ThunderLok remains on the cable so it won’t get lost when not in use.

ThunderLok Connection

20Gbps Thunderbolt 2 Interface

Echo Express SEL features 20Gbps Thunderbolt 2 which provides ample bandwidth for many of the most demanding, highest performance PCIe cards, and incorporates support for the DisplayPort 1.2 protocol which enables video streaming to a 4K video monitor. While the SEL delivers maximum performance when connected to a computer with Thunderbolt 2 ports, it is also fully compatible with computers with 10Gbps Thunderbolt, supporting most cards at full-performance.

Thunderbolt 2 Port

Thunderbolt 2 – Bandwidth. Performance. Versatility.

The original 10Gbps Thunderbolt interface provided breakthrough bandwidth for external expansion, more than sufficient to support the maximum performance of most PCIe cards. However, some high bandwidth adapters such as the BlueFish 444 Epoch 4K Neutron video I/O card, or other bandwidth-hungry cards require more than 10Gbps. Thunderbolt 2 removes this barrier by providing more bandwidth for demanding applications.

Thunderbolt 2 Port
Thunderbolt 2 Speed Comparison Chart

Thunderbolt 3 Upgrade Options

If you already purchased an Echo Express SEL, Sonnet offers a Thunderbolt 3 upgrade card – the upgrade is as simple as switching a PCIe card in the chassis.

If you’re in the market for a Thunderbolt 3 to PCIe card expansion system, the Echo Express SEL (Thunderbolt 3 Edition) is also available.

Thunderbolt 3 Upgrade Card
See Tech Specs for footnotes.
Product specifications and information subject to change without notice. Computer hardware and accessories featured in photos that are not included with product are shown for illustration purposes; items sold separately.

Echo Express SEL