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Sonnet Echo Express III-D

Home Host Controllers Sonnet Echo Express III-D Thunderbolt 2 Expansion Chassis
Desktop 3-slot Thunderbolt 2 expansion chassis for PCIe cards with integrated power supplies, variable speed fans, and two Thunderbolt ports to support daisy chaining of up to six devices.
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Three Slots, No Compromises
Sonnet's Echo Express III enables you to connect three compatible full-size professional video capture, audio interface, and other special-purpose cards to your iMac, Mac mini, MacBook Air, or MacBook Pro with a Thunderbolt port. The Echo Express III integrates a universal 300W power supply and includes a 75W auxiliary power connector for cards that require supplementary power. Even with all that power, the III is enviro-friendly; it automatically powers on/off when the connected computer powers on/off or sleeps. The use of larger, slower-spinning fans in the Echo Express III makes it the quietest Echo chassis yet. Two Thunderbolt ports support daisy chaining of up to six devices to a single port on your computer.

Desktop or Rackmount
The Echo Express III is available in two versions, the IIID (desktop) and IIIR (rackmount), to suit your workflow needs. The IIID's form factor makes it easy to transport. The IIIR mounts in a rack space 2U tall, and is just 15.75' deep, making it perfect for use in a wide range of popular mobile racks, carts, rack-bags, and server rooms as well. The IIIR even saves space for other equipmentwith the optional Echo Express IIIR Mobile Rack Kit, you can install one or two mobile rack devices in the IIIR's rack enclosure.

Smart Design Inside and Out
Constructed of rugged extruded aluminum, the outer shell of the Echo Express III helps transfer heat away from installed PCIe cards and securely protects them inside. To keeps things as compact as possible, universal power supplies are integrated inside the chassis so there're no dangling power bricks. Echo Express III includes an integrated 300W universal power supply with a 75W auxiliary power connectorand power harness cable. The top cover slides off for quick access to the PCIe slots and installation of cards. Ventilated front and back panels plus quiet, temperature-controlled fans (with no switches or jumpers to configure) automatically help keep even the very hottest cards cool; when not needed, the fans slow down so you can work without as much noise in the background. Echo Express products are enviro-friendly, automatically powering on and off with your computer.

Echo Express III-R Mobile Rack Kit
You can install two 5.25-inch form factor devices inside the IIIR's enclosure, such as an internal LTO 6 tape drive plus four swappable 2.5-inch SSDs. An alternate configuration might include a Sonnet Qio MR pro universal media reader. Or, install one full height mobile rack devices, such as three swappable 3.5-inch hard disk drivesnow you can add more devices to your rack without taking up additional rack space. A separate 80W power supply inside the Mobile Rack Kit powers the installed devices, while its internal fan works to keep things cool.

RED Rocket Supporter
If you're a RED Rocket user, you already know that the card normally takes up two PCIe slotsone for the card itself and another for the BNC connector bracket (for HD-SDI output). Sonnet designed the Echo Express IIID and Echo Express IIIR to make the card work in one slot without sacrificing any connections. These Echo chassis include mounting holes designed specifically for the installation of two BNC connectors, enabling you to install the Red Rocket card in one slot and its BNC connectors in the Echo chassis' mounting holes, leaving the two remaining slots open.


  • Connect Professional PCIe CardsUse high-performance PCIe card with Thunderbolt-equipped computers
  • Three PCIe SlotsSupport thee full-lenght, full-height, single-width cards, or one double-width card plus one single-width card
  • Desktop or RackmountAvailable as desktop model or 2U rackmount model with space for optional mobile rack device mounting kit
  • Optional Mobile Rack KitOptional Echo Express III-R Mobile Rack Kit supports installation of two single=height mobile rack peripherals or one double=height peripheral
  • Temperature-Controlled, Variable-Speed FansLarge, temperature-controlled fans automatically operate slower and quieter with cooler cards, providing better cooling for hot cards
  • Integrated Universal Power SupplyBuilt-in 300W power supply with 75W auxiliary power connector
  • Rugged Aluminum HousingPortable protection for any environment
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