# Thunderbolt Expansion Chassis Sonnet Echo Express SE IIIe

**URL:** https://aio.lv/en/product--sonnet-echo-ex-se3e-t3--3674373
**Data updated:** 2026-01-23 13:49 (EET)
**Category:** I/O Adapters & Controllers
**Manufacturer:** Sonnet
**Manufacturer code:** ECHO-EX-SE3E-T3
**EAN:** 0732311012938
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

The Sonnet Echo Express SE IIIe is a wired Thunderbolt expansion chassis designed for high-performance connectivity. It features a sleek black aluminum housing, ensuring durability and style. With a single Thunderbolt host interface, it supports various expansion cards, making it ideal for professionals needing enhanced connectivity options. The compact design allows for easy integration into any workspace, providing a reliable solution for expanding your system's capabilities.

## Long description

The Sonnet Echo Express SE IIIe is a compact Thunderbolt expansion chassis that connects up to three full-height, half-length (up to 7.75 in) PCIe cards to computers with Thunderbolt 3 or Thunderbolt 4 ports. Housed in a black aluminum desktop enclosure, the unit supports PCIe 3.0, 2.0, and 1.1 cards in three x8 slots and provides space for double-width cards with daughter boards. An auxiliary PCIe power connector is included for cards that require additional power.
Advantages
The Echo Express SE IIIe enables desktop systems and thin laptops running macOS, Windows 10, or Linux to use professional PCIe cards that would not otherwise fit or be supported. Its compact footprint offers three x8 PCIe slots in a small desktop chassis while remaining compatible with a wide range of Thunderbolt 3 and Thunderbolt 4 hosts. The auxiliary power connector expands compatibility to higher-power PCIe cards.
Suitable for
Audio and video professionals using PCIe capture, I/O, or DSP cards
Post-production and broadcast environments requiring multiple PCIe cards
Engineers and developers who need external PCIe expansion for thin clients or laptops
Key specifications
Interface to host: Thunderbolt 3 / Thunderbolt 4
PCIe slots: three full-height, half-length x8 slots (up to PCIe 3.0)
Supported PCIe versions: PCIe 3.0, PCIe 2.0, PCIe 1.1
Maximum card length: 7.75 inches (approx. 197 mm)
Enclosure: desktop, black aluminum
Auxiliary power: onboard PCIe auxiliary power connector for higher-power cards
How to use
Power off the expansion chassis and your host computer before installing PCIe cards. Open the chassis following the manufacturer’s instructions, insert the compatible PCIe cards into the x8 slots, and secure them. Connect the auxiliary PCIe power connector to any card that requires extra power, then close the chassis. Connect the Echo Express SE IIIe to your computer using a Thunderbolt 3 or Thunderbolt 4 cable, power on the chassis and the host, and install any required drivers or firmware for the installed cards on the host system.
Usage recommendations
Install only Thunderbolt-compatible host systems and use recommended power and Thunderbolt cables. Verify card length and any daughter-card clearance before installation, and confirm driver support for your host operating system (macOS, Windows 10, or Linux).

## Specifications

| Feature | Value |
|---|---|
| Ethernet LAN | No |
| Housing material | Aluminium |
| Built-in fan | Yes |

### Ports & interfaces

| Feature | Value |
|---|---|
| Host interface | Thunderbolt |
| Thunderbolt 3 ports quantity | 2 |

### Other features

| Feature | Value |
|---|---|
| Connectivity technology | Wired |

### System requirements

| Feature | Value |
|---|---|
| Windows operating systems supported | Y |
| Mac operating systems supported | Y |
| Linux operating systems supported | Y |

### Design

| Feature | Value |
|---|---|
| Product colour | Black |

### Logistics data

| Feature | Value |
|---|---|
| Quantity per pack | 1 pc(s) |

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Leasing for legal entities. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Sonnet products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Sonnet service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: host interface, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/3674373/64220928_large.webp