Part No. ECHO-DK21-T5

The Ultimate Thunderbolt 5 Dock

Echo 21 Thunderbolt 5 SuperDock

Universal Thunderbolt 5 Dock with Three Thunderbolt 5 Ports, M.2 SSD Slot, 10Gb Ethernet Port, Two Display Connection Ports, Nine 10 Gbps USB 3 Ports, and More

Thunderbolt 5: Tomorrow’s Performance. Today.

How do you improve on the award-winning Echo 20 Thunderbolt 4 SuperDock? You double the bandwidth. You increase the power. You add the most-requested features.

Presenting the Echo 21 Thunderbolt 5 SuperDock — our most powerful and expandable dock ever — featuring superfast SSD internal storage capability and built-in 10GbE networking. Transform a single cable connection from your computer into two Thunderbolt 5 peripheral ports, one NVMe SSD slot, one 10Gb Ethernet port, nine 10 Gbps USB ports, two video output ports, and more! With 80 Gbps of bi-directional data speed — twice as fast as Thunderbolt 4 — and 120 Gbps for higher display bandwidth, you'll revolutionize your productivity.

Connect Your Peripherals and Power Your Laptop with One Thunderbolt 5 Cable

Echo 21 Thunderbolt 5 SuperDock links connected Thunderbolt devices, monitor(s), USB peripherals, powered speakers, and Ethernet cable to your computer with a single Thunderbolt 5 cable. Got a laptop? Keep its power adapter in your bag — the SuperDock will power it with 140W of charging power. When it’s time to leave, just unplug the Thunderbolt cable, grab your computer, and go.

Internal SSD Expansion Slot

Add up to 8TB of high-speed SSD storage (SSD sold separately) directly inside the dock —no external storage device required. Installation is simple: remove the bottom panel, insert the SSD, and secure the cover. Once installed, access and transfer data at up to 3300 MB/s. Ideal for pro content creation, application storage, large media libraries, and Time Machine backups.

Which SSDs are recommended? View our NVMe SSD Compatibility PDF for SSDs tested for compatibility and recommended for maximum performance.

Onboard HDMI and DP Display Support

Echo 21 Thunderbolt 5 SuperDock features video output ports for HDMI and DisplayPort displays, enabling you to connect either an up to 8K* @60Hz HDMI monitor or a 4K @144Hz DisplayPort monitor.

Blazing-fast 10GBASE-T Access

Echo 21 Thunderbolt 5 SuperDock supports demanding workflows with built-in 10 Gigabit Ethernet, enabling connection to 10GbE infrastructure using cost-effective Cat 6 or Cat 6A copper cabling (up to 55 or 100 meters, respectively) — eliminating the need for a separate adapter.

Delivering up to 10x the performance of Gigabit Ethernet, the dock also supports 5 Gbps, 2.5 Gbps, 1 Gbps, and 100 Mbps link speeds when connected to switches or NAS devices without 10GbE support, using standard Cat 5e (or better) cabling.

AVB Support: Audio Video Bridging (IEEE 802.1Qav, AVB) support for macOS makes this dock ideal for use in pro audio and video applications where synchronization of data streams is critical.

High Resolution Audio Support

Echo 20 Thunderbolt 5 SecureDock features a hi-res Audio Codec (coder-decoder) that supports the dock’s audio I/O jacks with high quality, lossless audio. And, with the SecureDock’s fanless, silent design, you’ll hear every detail.

Headset Microphone

• 24-bit/48 kHz and 24-bit/96 kHz sample rates
Ideal for meetings, calls, and chat headsets, and supports professional microphones.

Headset Earphones

• 24-bit/44.1 kHz
Ideal for CDs and music libraries, avoiding resampling of 44.1 kHz audio content.
• 24-bit/48 kHz
Great choice for streaming video and meetings. Supports Apple Lossless Audio Codec (ALAC) playback.
• 24-bit/96 kHz
Fantastic choice for audiophiles; supports Hi-Res Apple Lossless playback.
• 24-bit/192 kHz
Ideal when maximum detail is required; supports high-resolution Apple Lossless playback, preserving the full fidelity and dynamic range of studio-quality audio recordings.

Dedicated Mic Jack

• 24-bit/96 kHz sample rate
Connect a dedicated microphone for clear voice input during meetings, calls, streaming, and voice recording.

Stereo RCA Jacks

• 24-bit/96 kHz sample rate
Provide consistent line-level audio output, ideal for connecting powered speakers or directly to a receiver, power amplifier, or mixer. Also excellent for self-powered studio monitors and other professional audio equipment. Supports Hi-Res Apple Lossless playback.

Dual Downstream Thunderbolt 5 Ports for Simple, Powerful Connectivity

Echo 21 Thunderbolt 5 SuperDock incorporates three Thunderbolt 5 ports. One connects to and powers your computer — ideal for laptops with only one or two Thunderbolt ports, since it handles charging and data through a single connection. The other two support Thunderbolt 5, 4, and 3 devices — as well as USB4 and USB 3 peripherals — and each provides 15W for demanding bus-powered devices. If supported by your computer, you can also connect one, two, or even three additional displays.

All the Ports: Thunderbolt 5, SSD Expansion, Display, 10GbE Networking, Audio, and USB Connectivity In One Powerful Dock

Powerful 10 Gbps USB-A and USB-C Ports

Echo 21 Thunderbolt 5 SuperDock delivers powerful USB 3 connectivity with four 10 Gbps USB-A ports, and five 10 Gbps USB-C charging ports — including two on the front, two on the back, and a front 15W USB-C charging port. All ports support super-fast 10 Gbps USB NVMe SSDs at full speed.

Echo 21 doesn’t skimp on power either — each port provides 7.5W (or 15W) to ensure that drives with higher peak power requirements mount and operate reliably. An added benefit of the USB-C ports is they support device charging even when the computer is off, asleep, or disconnected.

More Pixels: Drive 4K, 5K, 6K, and up to 8K Displays via Thunderbolt

Depending on your computer’s graphics capability and whether a DisplayPort or HDMI monitor is connected to one of the dock’s built-in display outputs, the Echo dock’s Thunderbolt ports can support as many as three displays — at 4K, 5K, or 6K resolution, and up to 8K*.

Connect Thunderbolt 5, 4, 3, or USB-C monitors directly, or use a Thunderbolt-compatible adapter (sold separately) to connect HDMI, DisplayPort, and other display types.

How many displays does your computer support? View our Display Compatibility PDF to see how many displays you can use.

Charge It Up – Leave the Power Adapter In Your Backpack

Connected to your laptop computer with the included Thunderbolt 5 cable, Echo 21 Thunderbolt 5 SuperDock provides up to 140W of power (Power Delivery), enabling it to power and charge your computer while connected, even when not in use, allowing you to leave your computer’s charger packed away.

Media Readers – Fast UHS-II SD and microSD 4.0 Card Readers

The included SD and microSD card slots are compatible with SD, SDHC, and SDXC; and microSD, microSDHC, and microSDXC memory cards, respectively, and support 320 MB/s read speeds with UHS-II SDXC and microSDXC cards to quickly offload images and video files.

Security

Connect It Securely: Thunderbolt 5 Cable and ThunderLok Included
The included Thunderbolt cable delivers Thunderbolt 5’s full bandwidth and power delivery performance, and is compatible with Thunderbolt 5, 4, and 3, and USB4 computers. A provided ThunderLok connector lock helps prevent accidental disconnections from the SecureDock.

Physical Security: Kensington Lock Ready
With up to 8TB of valuable data inside, you can secure the Echo dock with a Kensington Lock (sold separately). The dock is compatible with Standard, MicroSaver, and MicroSaver 2 locks.

Key Features & Specifications

• One Cable Peripheral Connection – Instant access: plug all your peripherals into the Echo dock and connect your computer to the dock with the included Thunderbolt 5 cable.
  
• Twenty-One Interfaces – SuperDock includes three Thunderbolt 5; four 10 Gbps USB-A, and five 10 Gbps USB-C charging ports; video output ports for HDMI and DP displays; RJ45 10 Gigabit Ethernet; 3.5 mm combo audio; 3.5 mm microphone; line-level R+L RCA audio out; fast UHS-II SD and microSD card slots; and an M.2 SSD slot.
• Two Thunderbolt 5 Ports for Peripherals – Connect two Thunderbolt peripherals (with support for daisy chaining additional peripherals). Also support USB4 and USB 3 devices, plus displays.
  
• M.2 NVMe SSD Slot – Add up to 8TB of internal storage (SSD sold separately) with up to 3300 MB/s performance — perfect for content creation, media libraries, and backups. View our NVMe SSD Compatibility PDF for SSDs tested for compatibility and recommended for maximum performance.
• 10Gb Ethernet Port – Link to an Ethernet network or NAS at 10 Gigabit speed! Also supports 5Gb, 2.5Gb, and 1Gb Ethernet link speeds.
• 10 Gbps USB-C Port (with 15W Charging) –  USB-C port provides 15W of power for operation or charging. Port supports super-fast 10 Gbps USB NVMe SSDs at full speed.
• 10 Gbps USB-C Ports (with 7.5W Charging) – Four USB-C ports provide 7.5W of power each for operation or charging. Ports support 10 Gbps USB NVMe SSDs at full speed.
  
• 10 GBbps USB-A Ports (7.5W) – Four USB-A ports provide 7.5W of power each and support 10 Gbps USB NVMe SSDs at full speed.
  
• Video Output (HDMI) Port – Connect a 1080p, 1440p, 4K, 5K, 6K, or 8K HDMI display directly, no adapter required.
  
• Video Output (DisplayPort) Port – Connect a 1080p, 1440p, or 4K display directly, no adapter required.
• Connect One, Two, or Three Displays via Thunderbolt – Depending on your computer, connect one or two Thunderbolt or USB-C displays directly, and daisy chain a third (see official product page Tech Specs for details). Supports HDMI and DP displays with Thunderbolt-compatible adapters (sold separately). View our Displays Compatibility PDF to see how many displays you can use with your computer.
• Supports 1080p, 1440p, 4K, 5K, 6K, and 8K Displays @ up to 500Hz – Depending on your computer, supports up to two 8K displays, or three or four 4K, 5K, or 6K displays (see official product page Tech Specs for details).
• Charge Your Laptop – Provides 140W through the included Thunderbolt 5 cable to power and charge your laptop.
• Hi-res Audio I/O Support – 3.5mm stereo headset jack on the front panel. Separate left/right channel RCA line out jacks that deliver a clean signal to powered speakers or an amplifier, plus a 3.5mm microphone jack populate the back panel.
• Fast UHS-II SD and microSD Card Slots – Compatible with SD, SDHC, SDXC; and microSD, microSDHC, and microSDXC memory cards; supports 320 MB/s read speeds with UHS-II cards.
• Compatibility – Compatible with all M series Macs, and Intel Macs with Thunderbolt 3 ports; Windows computers with Thunderbolt 5 or 4, or USB4 ports; Chromebook computers with Thunderbolt 5 or 4, or USB4 ports; and M series iPad Pro tablets. See official product page Tech Specs for detailed computer, display, SSD, and OS compatibility information.
  
• Dimensions (WxDxH) – Dock: 9.6 x 4.2 x 1.3 in. (24.3 x 10.6 x 3.3 cm); Power Adapter: 2.9 x 6.1 x 1 in. (7.5 x 15.5 x 2.5 cm).
• Weight – Dock and power supply: 2.9 lbs (1.3 kg); Complete Package: 4.1 lbs (1.9 kg).
• Package Contents – Echo 20 Thunderbolt 5 SecureDock; power adapter; power cord; 0.8-meter Thunderbolt 5 cable; ThunderLok-A connector lock; and documentation.
• Warranty – 2-year product warranty.
• Customer Support – Lifetime technical support.
• The Sonnet Advantage – Innovating technology since 1986.

* See official product page Tech Specs for details.

Note: Computers and accessories featured in photos are not included with the product. Product specifications are subject to change without notice.

Product Marketing and Technical Info
Visit: Official Product Page

Pre-sales Questions?
Contact: [email protected]

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