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Triangle Hi-Fi Thetis 340 Bass-Reflex Subwoofer with LED Display (Gloss Black)

  • mfr: THET_TSW9_I_V1_C
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    *Orders placed before 3 PM EST Mon - Thur will ship the same day. Orders placed beyond these hours will be shipped the next business day. Exclusions apply. See shipping policy

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Product highlights

  • 10-inch driver
  • 250W amplifier
  • Direct LFE input
  • Standard RCA input
  • High-level input
  • LED display on the front panel

Triangle Hi-Fi Thetis 340 Bass-Reflex Subwoofer with LED Display (Gloss Black)

The Thetis 340 subwoofer is a must-have for any home theatre system. It'll be a great match for your music system because it's so versatile. It comes with a 25cm speaker and a 250W amplifier, ensuring a unique and immersive experience.

Powerful Output

The Thétis 340 boasts a power of 250W/150W RMS and 400W/250W peak, thanks to the latest generation of Class-D amplifiers. It's simple to tune the Thétis subwoofer to your primary speakers thanks to the steep crossover slopes.

Bass-Reflex Configuration

The subwoofer maintains a limited volume despite its extended performance by utilizing a bass-reflex principle. Airflow noise is greatly reduced when using a laminar port. The Class D amplifier produces 250 watts RMS and 400 watts peak of power.

Variety of Ports

The Thetis subwoofer includes a variety of inputs, allowing them to be connected to a variety of amplifiers. It has a direct LFE input, standard RCA inputs, and high-level inputs for amplifiers with no suitable output. You can adjust the volume, the phase, and the frequency roll-off for a perfect fit with your main speakers.

Easy to Use

The Thetis subwoofer comes with remote control and a front-panel LED display that indicates the sound settings. It has an Automatic Power On feature. The Auto function of the subwoofer can also be used to enable automatic standby. To save energy, an automatic standby is enabled after 20 minutes if there is no signal. The subwoofer is automatically reactivated when a new signal is received.

Successful Design

This subwoofer has great power handling, reproducing all types of dynamics without difficulty, thanks to oversized engines and controlled suspensions. The transducers use composite membranes made of cellulose and carbon, that ensure high rigidity.


Smart Specs
Virtual Assistant Support Not Available
Power Consumption 250 W
AC Input Power Not Available
Watts 250


Customer Questions
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Returns are incredibly simple. Please log into your account, find your item you wish to return and follow the prompts to make a return. If you do not have an account, click here to find your order and make a return.
You will receive a full refund when you return an item in its original manufacturer’s packaging, undamaged and unmarked. If the item you are returning is priced at less than $35, you will be charged a 15% restocking fee. Please note you will not be refunded any shipping charges. 
You have 30 days to make a return. During the holiday season, from November 1 to December 31, we extend the return window to 60 days. 
If your order has been noticeably damaged in transit, we strongly recommend that you refuse delivery and notify us immediately. Claims for missing items or items damaged in transit must be made within 48 hours of delivery. If there is carrier damage, please contact [email protected] with your order number and a description of the damage. 
Oh no! Please contact our customer service team so we can resolve the issue immediately. You can call us on 1.800.221.0828, email us at [email protected], or send us a message here.  
We do not currently offer exchanges. Please return the item you purchased within 30 days and order what you’d like instead. 
If you ordered a kit, you must return all components and accessories to receive a full refund. 
If you ordered a product that included a free item, you must include the free item with your return. If not, your return will not be accepted and you will not receive a full refund. 
We currently only offer camera repairs at our Brooklyn store. The item must be dropped off and collected in person as we do not accept shipped items for repair. For more information, please call our Brooklyn store on 1.718.431.7900. 
Most items can be returned within 30 days for a full refund. Click here to read our full return policy. 

Shipping and Returns

Same Day Shipping

All orders placed by 4PM( EST), Monday through Thursday, and by 11AM (EST) on Friday, are shipped same day. Orders placed outside these times will ship the next business day. We do not ship internationally or to Puerto Rico, Guam and other US territories at this time. For more details click here.

Free Two-Day Shipping

We offer free expedited shipping on thousands of items within the continental USA (this does not include Alaska and Hawaii).

Flexible, Easy Returns

If you're not happy with your purchase for any reason, our flexible 30-day free return policy makes it easy to get a full refund. Click here to view our return policy.

Ratings and reviews

Triangle Hi-Fi Thetis 340 Bass-Reflex Subwoofer with LED Display (Gloss Black)

Triangle Hi-Fi Thetis 340 Bass-Reflex Subwoofer with LED Display (Gloss Black) SKU: THETIS340-BLKGL

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