Sonnet Echo III Rackmount Thunderbolt 3 Expansion System
Sonnet Echo III Rackmount, Thunderbolt 3 to PCIe Card Expansions System, 2U Rackmount, 2750MBs PCIe Bandwidth
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Sonnet - 'Echo III Rackmount'
3-Slot Rackmount Thunderbolt 3 to PCIe Card Expansion System

Connect Three full-length PCIe Cards to computers with thunderbolt 3 portsThe best portable, mini desktop and all-in-one computers feature powerful CPUs and include high-performance Thunderbolt™ ports to support peripherals. But they lack the PCIe expansion slots creative pros need to install specialty adapter cards that enable their workflows by adding video and audio inputs, transcoding data, and connecting to high-speed shared storage and networks. Sonnet has a solution—the Echo™ III Rackmount—a professional Thunderbolt™ 3 to PCIe card expansion system that enables you to connect three (up to) full-length (12.28 inches long) PCIe cards to your computer at the same time, via a single cable.
2750MBs PCIe Bandwidth

The Thunderbolt 3 LinkPlugged into one of your computer’s Thunderbolt 3 ports, the Echo III Rackmount system delivers 2750 MB/s of PCIe bandwidth and enables you to connect professional PCIe cards (three full-height, single-width cards, or one double-width card plus one single-width card).
Large PCIe Card Compatibility

Video

Audio

SAS/SATA

Networking

SSD
Supports every Thunderbolt 3 compatible, non-gpu PCIE Card
Echo III Rackmount supports every Thunderbolt 3 compatible, non-GPU PCIe 1.1/2.0/3.0 card available including video capture and transcoding; audio DSP; 6Gb or 12Gb SAS or SATA host bus adapter; 10Gb or 25Gb Ethernet; SSD storage; and other specialty types to your system.
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.
Manufacturer List of Supported PCIe Cards
Avid Pro Tools Qualified

Ready for up to three Pro Tools | HDX PCIe Cards – no extra parts requiredAt the flick of a switch, the Avid qualified Echo III Rackmount system is instantly optimized to support up to three Pro Tools | HDX PCIe cards, with no extra parts necessary! This chassis has been tested and is qualified by Avid Audio group for use with Avid Pro Tools HD 2020 software, and Avid Pro Tools HDX and HD Native systems.
*Avid Pro Tools | HDX cards sold separately

Your Entire Multi-card Pro Tools | HDX System in 4U Rack SpaceSonnet makes it easy to integrate a complete 2- or 3-card Pro Tools | HDX system and a Mac mini® in just 4U of rack space. With the rugged 1U RackMac mini rackmount enclosure plus the 2U Echo III Rackmount you can combine the power of HDX with any Avid Pro Tools hardware I/O for a complete system, including the exciting Pro Tools | MTRX Studio all-in-one audio interface.
*Avid Pro Tools | MTRX Studio, Sonnet RackMac mini, PCIe cards, and mobile rack kit sold separately
Ready for Future Expansion

Adds Connectivity & CapabilitiesConnects up to three high-performance non-GPU PCIe cards to your computer lacking expansion slots via a Thunderbolt 3 cable.

Broad PCIe Card CompatibilityEvery Thunderbolt 3 compatible, non-GPU card supported regardless of length or height.

Pro Tools | HDX CompatibleHDX compatibility mode enables use of up to three Pro Tools | HDX PCIe cards with no additional parts needed.

Three PCIe 3.0 SlotsOne x16 plus two x8 slots support three full-height, single-width cards, or one double-width card plus one single-width card.

Pro PowerIntegrated 400W power supply with 75W auxiliary power. Saves energy by powering on/off automatically with the computer.

Remarkably QuietDual temperature-controlled, variable-speed Noctua fans rated at 17dBA automatically and quietly cool the cards.

40Gbps Thunderbolt 3 InterfaceOffers 2750 MB/s of PCIe bandwidth for the installed cards.

Two Thunderbolt 3 PortsOne port connects to computer; second port supports daisy-chaining of up to five additional Thunderbolt peripheral devices.

Rugged 2U Steel Rackmount Housing + Optional Expansion SpaceProvides robust and secure protection in server and DIT racks; space for optional future expansion.
400W Power Supply

Three PCIe 3.0 Slots Plus Power to SpareThe Echo III Rackmount features one x16 and two x8 PCIe 3.0 slots, enabling it to support a wide variety of cards at the same time. It integrates a universal 400W power supply, plus a 75W auxiliary power connector to support especially power-hungry non-GPU cards, including the Avid Pro Tools | HDX. The Echo III was designed without a power switch, because it powers on and off automatically with the connected computer, saving energy in the long run. With no power switch, you can’t forget to turn off the system!
Ultra-Quiet, Dual Fan Cooling Solution

Built for Cool, Rackable ExpansionThe Echo III Rackmount mounts in a rack space 2U tall, and is only 16.5 inches deep, making it ideal for use in a wide range of popular mobile racks, carts, and rack cases, and in server rooms as well. Its enclosure is formed of heavy-duty steel to provide secure mounting for the inner assembly and protection for the PCIe cards installed inside, and to support maximum airflow for cooling, regardless of where you install it in a rack.

Dual Fans, Ultra-quiet OperationFeaturing dual Noctua fans, the Echo III Rackmount is designed to deliver ultra-quiet operation so that it can be comfortably used in noise-sensitive environments. Rated at 17.1dBA—below the 20dBA ceiling prescribed for use in recording and broadcast studios—the fans spread their noise spectrum to minimize any single frequency’s impact. To further ensure negligible noise levels, the fans are temperature-controlled, automatically speeding up and slowing down smoothly as needed, and the enclosure is engineered to optimize airflow over the installed cards to effectively and efficiently cool the system.
Included Cable & Locking Mechanism

Sonnet Thunderbolt 3 Cable & ThunderLok 3Sonnet includes a 0.7-meter Thunderbolt 3 (40Gbps) cable that transfers data at Thunderbolt 3’s full 2750 MB/s PCIe bandwidth. In addition, Sonnet provides a ThunderLok 3 Thunderbolt connector retainer clip(2) that prevents 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 AdvantageSonnet Thunderbolt expansion systems are designed with Thunderbolt ports that include a threaded mounting holes for securing Sonnet's ThunderLok retainer clips that prevent accidental cable disconnections.
40Gbps Thunderbolt 3 Interface

Get Full Thunderbolt Performance, at a DistanceWhether noisy PCIe card fans make it impractical to use the Echo III Rackmount in a noise-sensitive environment, or because securing it in another room is required, you may find it necessary to put some space between the chassis and computer. No problem! Thunderbolt 3 optical cables (sold separately), available in lengths from 5 to 50 meters, enable you to locate your equipment where you need and connect the pieces without loss of functionality. These thin, lightweight, and tough fiber optic cables are easy to route, and support high-speed data transmission equal to copper Thunderbolt cables.

Fastest External Interface AvailableThe Echo III Rackmount features a 40Gbps Thunderbolt 3 (USB-C®) interface that delivers up to 2750 MB/s of PCIe bandwidth, enabling it to support 4K video capture and processing cards at high frame rates, multiple audio DSPs, and 25GbE and dual-port 10GbE network cards at full performance.

Backward Compatible with Older MacsNo Thunderbolt 3? No problem—the Echo III Rackmount is also compatible with Macs with Thunderbolt 2 ports when used with the bi-directional Apple Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter and a Thunderbolt cable (both sold separately).
Compatible with macOS 10.12.6+ and macOS BigSur, Windows 10 and Linux Kernal 5.0+