# Sonnet Thunderbolt PCIe Expansion Chassis Echo Express SE IIIe — Wired, Black, Aluminium

**URL:** https://aio.lv/en/product--sonnet-so-echo-ex-se3e-t3-old--11823431
**Data updated:** 2026-03-09 11:12 (EET)
**Category:** I/O Adapters & Controllers
**Manufacturer:** Sonnet
**Manufacturer code:** SO-ECHO-EX-SE3E-T3-OLD
**EAN:** 732311012938
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 1 313.99 €
**Prices and availability valid until:** 2026-07-20 23:59
**Price without VAT (21%):** 1 085.94 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sonnet-so-echo-ex-se3e-t3-old--11823431

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 15.07.2026 | free |
| Pickup points | 20.07.2026 | 1.89 EUR |
| Courier delivery to door | 20.07.2026 | 4.99 EUR |

## Summary description

Sonnet Echo Express SE IIIe is a wired Thunderbolt PCIe expansion chassis designed to host standard PCIe cards. It features a Thunderbolt host interface, black aluminium housing and is supplied as a single unit. Suitable for adding external GPU, audio, capture, or other PCIe cards to compatible Thunderbolt-equipped computers for desktop expansion and professional workflows.

## Long description

Sonnet Thunderbolt PCIe Expansion Chassis Echo Express SE IIIe is a wired desktop enclosure that connects up to three full-height, half-length+ PCIe cards to computers with Thunderbolt 3 or Thunderbolt 4 ports. Housed in a black aluminium case, the Echo Express SE IIIe provides three x8 PCIe slots compatible with PCIe 3.0, 2.0 and 1.1 cards up to 7.75 inches long and includes an auxiliary PCIe power connector for cards that require additional power. The unit ships as a single desktop chassis with a Thunderbolt host interface and is intended for professional desktop expansion of GPUs, audio interfaces, capture and other PCIe cards on Thunderbolt-equipped Mac, Windows and Linux systems.
Advantages
The Echo Express SE IIIe enables multiple professional PCIe cards to be used simultaneously from a single Thunderbolt port, expanding a computer’s capabilities without internal installation. The compact aluminium enclosure provides durable desktop placement while an included 120W universal power adapter and an auxiliary power connector support power-hungry cards. Two Thunderbolt ports on the chassis preserve connectivity and the supplied Thunderbolt 3 cable and ThunderLok 3 retainer clip ensure full Thunderbolt bandwidth and a secure connection. The unit includes a temperature-controlled fan to maintain stable operation under load and offers broad OS compatibility for Mac, Windows 10 and Linux computers.
Suitable for
Adding professional audio PCIe cards and DSP interfaces to Thunderbolt-equipped computers
Connecting video capture and playback cards for broadcast and post-production workflows
Attaching additional I/O cards such as high-density connectivity or specialised expansion cards
Desktop setups requiring multiple PCIe cards without internal desktop or workstation access
Key specifications
Interface: Thunderbolt 3 host interface (40 Gbps)
Thunderbolt ports on chassis: Two Thunderbolt 3 ports
PCIe slots: Three full-height, half-length+ x8 slots supporting PCIe 3.0/2.0/1.1
Maximum card length supported: Up to 7.75 inches (approx. 197 mm)
Auxiliary power: PCIe auxiliary power connector for additional card power
Cooling: Quiet, temperature-controlled fan
Power supply: 120W universal power adapter
Enclosure material and colour: Black aluminium chassis
Included accessories: 0.7 m Thunderbolt 3 cable optimized for full bandwidth and Sonnet ThunderLok 3 connector retainer clip
Compatibility: Mac, Windows 10, and Linux systems with Thunderbolt 3 or Thunderbolt 4 ports
How to use
Install the required PCIe cards into the three available x8 slots inside the Echo Express SE IIIe, securing any double-width or daughter-board style cards as needed. Connect the unit to your computer using the supplied Thunderbolt 3 cable and attach the 120W power adapter. If a card requires extra power, attach a compatible cable to the auxiliary PCIe power connector. Power on the chassis and the host computer; the Thunderbolt connection will enumerate installed PCIe cards to the operating system. Install any vendor drivers or firmware on the host computer as required by each PCIe card to enable full functionality.
Usage recommendations
Place the chassis on a stable, well-ventilated desktop surface to ensure adequate airflow for the temperature-controlled fan. Use the supplied Sonnet Thunderbolt 3 cable and ThunderLok 3 retainer clip to maintain full bandwidth and prevent accidental disconnection. For cards that draw significant power, confirm compatibility with the auxiliary power connector and verify any vendor power requirements before prolonged high-load operation.

## 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

### How much does the Sonnet Echo Express SE IIIe Thunderbolt PCIe Chassis cost, and is it available for purchase?

The price is 1,313.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 5 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 15.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment, Leasing for legal entities. All transactions are 100% secure and encrypted.

### Can Sonnet Echo Express SE IIIe Thunderbolt PCIe Chassis be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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/11823431/67289771_large.webp