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Echo Express SEL Thunderbolt 2 Expansion Chassis Free Shipping!

Echo Express SEL Thunderbolt 2 Expansion Chassis

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Our PN: SNTN5250040
Manufacturer: Sonnet
Platform(s): Mac & Win

Availability: Usually ships in 2-business days or less.


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Quick Overview

Desktop 1-slot compact Thunderbolt 2 expansion chassis for low-profile PCIe card with temperature-controlled fan and two Thunderbolt ports to support daisy chaining of up to six devices



Manufacturer Part Number: ECHO-EXP-SEL

Use a Low-Profile PCIe Card with Computers Lacking Expansion Slots
Today's ultra-light notebooks, mini, and all-in-one desktop computers now have tremendous processing powerpower that many thought would only be possible in full-size workstation or large desktop computers. Smaller in size and more portable, they're very desirable. For pros in the creative fields, processing power alone is not enough. A prime example is the new Mac Pro. Reviewers love its performance, but make a point of mentioning its lack of internal expansion capabilities compared to the old towers the new model replaces. If you want to add more capabilities, think externalthe new Pro is loaded with Thunderbolt 2 and USB 3.0 ports, but it lacks the PCIe expansion slots necessary for you to install specialty high bandwidth NIC cards, or HBAs and RAID controller cards for high-performance storage. With the Echo Express SEL, Sonnet has created a solution that leverages the paradigm shift enabled by Thunderbolt technology, allowing PCIe expansion slots to be connected outside a computer. This very compact desktop Thunderbolt 2-to-PCIe card expansion chassis is ideal for connecting one professional 16Gb or 8Gb Fibre Channel, 10 Gigabit Ethernet, SAS/SATA host bus adapter or RAID controller PCIe card to any Mac with a Thunderbolt port.

Featuring 20Gbps Thunderbolt 2 technology that provides sufficient bandwidth to support many of the highest performance and most demanding PCIe cards, the Echo Express SEL delivers maximum performance when connected to a computer with Thunderbolt 2. The SEL is also fully compatible with computers with 10Gbps Thunderbolt technology, supporting most cards at full-performance.

Key Features

  • Use PCIe Expansion Cards with Computers Lacking SlotsUse high-performance PCIe cards with any Mac with a Thunderbolt port
  • Thunderbolt 2 InterfaceMaximum performance with computers with Thunderbolt 2 technology, backward compatible with host computers and other devices equipped with 10Gbps Thunderbolt technology
  • Small and LightMost compact Thunderbolt 2-to-PCIe expansion system available, designed to fit the most popular Thunderbolt-compatible high-speed networking and storage controller interface cards
  • One PCIe SlotSupports low-profile card
  • Two Thunderbolt PortsDaisy chain up to six devices to a single port on the host computer
  • Remarkably QuietTemperature-controlled, variable-speed fan automatically and quietly cools the card
  • Energy Saver ModePowers on/off automatically with the computer
  • Rugged Aluminum HousingProvides robust and secure protection for any environment

Full Performance in a Small and Light Package
Thunderbolt 20Gbps IconThe Echo Express SEL is small, light, and perfect for use in situations where only a single low-profile PCIe card is needed. Measuring a scant 4' wide by 8.4' long by 2.8' tall, the SEL was designed specifically to house one low-profile PCIe card. Many of the most popular Thunderbolt-compatible high-speed networking and storage controller cards are a perfect fit. The SEL's small size doesn't limit its performance; installed in this system, a card will perform the same as when installed in an Echo Express SE II, Echo Express III-D, or Echo Express III-R. And like the other Echo Express models, the SEL includes two Thunderbolt ports to support daisy chaining of up to six devices from a single port on your computer.

Smart Design Inside and Out
Aluminum Element SymbolConstructed of rugged and lightweight aluminum, the outer shell of the Echo Express SEL securely protects the PCIe card installed inside. The variable-speed, temperature-controlled fan automatically speeds up as necessary to ensure that even a hot-running card and the chassis' components remain reliably cool. Because the fan automatically speeds up and slows down as needed, there is no guesswork in setting a switch position, and no need for tools to change settings. Since Echo Express products automatically power on and off with your computer, there is no power switch on the chassis.

Ultra Quiet IconQuiet, Please
The Echo Express SEL was 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 quietly and efficiently cool the installed card with a temperature controlled, variable speed fan. The SEL is Sonnet's quietest expansion chassis yet.

Designed for Low-Profile PCIe Cards
The Echo Express SEL supports one half-length (up to 6.6'), low-profile, single-width PCIe card. PCIe 1.1, PCIe 2.0 and PCIe 3.0 cards are supported. Do you have a card in mind but aren't sure it's compatible? We've worked closely with PCIe card manufacturers to provide a list of compatible cards on our supporting PCIe Card Thunderbolt Compatibility Chart. The chart provides an up-to-date list of cards that have been tested to be recognized over a Thunderbolt connection and compatible with Thunderbolt technology requirements.

Thunderbolt Cable LockThunderbolt Cable Lock Included
Sonnet includes a lock that secures Thunderbolt connectors(3) plugged into the Echo chassis. It is easy to install and prevents accidental cable disconnections.


  • Warranty 1-year
  • Dimensions WxDxH: 4 x 8.42 x 2.82 in. (10.16 x 21.39 x 7.16 cm)
  • Weight 1.75 lbs (3.4 kg)
  • Form Factor Desktop
  • External Connectors
    • Two Thunderbolt
    • Power
  • Expansion Slot One x8 mechanical (x4 electrical) PCIe 2.0
  • PCIe Cards Supported(1) One low-profile PCIe card
  • Compatible PCIe Cards(2) Up-to-date PCIe cards listed on our supporting PCIe Card Thunderbolt Compatibility Chart
  • Power Supply Universal 80W, 100-240V AC, 50-60 Hz
  • Operating Temperature 0 C to 35 C (32 F to 95 F)
  • RoHS Compliant Yes

Included Items

  • Echo Express SEL chassis(1)
  • Power adapter
  • Power cord
  • Thunderbolt cable lock(3)
  • Documentation
  • Note: PCIe cards and Thunderbolt cable sold separately


  • Mac Compatibility
    • Any Mac with a Thunderbolt2 or Thunderbolt port
    • OS X 10.8.5+
    • OS X Server and OS X Mavericks compatible
  • PC Compatibility
    • Any PC with a Thunderbolt 2 or Thunderbolt port(4)
    • Windows 8, 7


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