RTF10AS Double Box

Enjoy 5% off pre-order products, automatically applied at checkout.

Offer not valid on MTX Audio, Alpine, Focal, Pioneer, Kenwood, Dynavin, JVC and JBL products.

How to understand the displayed delivery times?

For greater transparency, we display the availability of each product in a box at the top of its product page:

• 🟢 In stock: product available in our warehouse, ready to be shipped.
• 🟠 Pre-order – X business days: average time to receive the product in our warehouse before it is shipped to you.

Delivery times are estimates and may vary depending on suppliers and shipping.

We do our best to provide you with clear and reliable information so that you can order with full knowledge of the situation.

Upon receipt of the product, your order is automatically prepared and shipped. You will receive tracking information by email.

Need fast delivery? Choose "In stock" products.

🚚 Free delivery on orders over €49 with Chronopost Économique to a pickup point (estimated delivery time of 4 to 10 business days).

Please note: some heavy or bulky parcels cannot be delivered to a pickup point and may require a contribution towards shipping and handling costs.

These costs are automatically calculated and displayed in your cart before you confirm your order.

Other faster delivery methods are also available depending on the products and your delivery address.

📦 Preparation and shipping

In-stock products ordered before 12 p.m. are generally shipped the same day. After 12 p.m., shipping generally takes place on the next business day.

Pickups are available Monday through Friday, excluding holidays.

🚚 Our delivery methods

• Chronopost Économique pickup point: free delivery with purchases of €49 or more (4 to 10 business days).
• Chronopost 24h pickup point: fast delivery to a pickup point.
• 24h home delivery: our only home delivery option. Please note that this delivery method is not considered a guaranteed express delivery.

Delivery times begin once the carrier has accepted the package and are provided as estimates in business days.

Important: check that your product is listed as "In stock" on its product page. For pre-orders, shipping takes place only after the product has been received at our warehouse.

Some heavy or bulky packages may incur additional shipping and handling fees, which are automatically displayed in your cart.

⚠️ Receiving your package

Check the condition of your package before accepting it. In the event of damage, make specific reservations with the carrier or refuse the package if necessary.

If you experience any problems, please contact our customer service team promptly.

Unsure about choosing a product or its compatibility? Our team is here to help!

📞 Phone: 09 85 13 66 35

💬 Live chat: directly on our website.

🕒 Our hours:

• Tuesday to Saturday
• Mornings: 9:30 am – 12:00 pm
• Afternoons: 1:30 pm – 6:00 pm

Need help choosing your equipment?

Our advisors can guide you and even prepare your cart directly via chat, with products tailored to your needs.

💪 Take advantage of our technical expertise to order with complete confidence!

The Sound Auto Concept Team

Extra-flat closed passive enclosure with 25cm 300W RMS 4Ω MDF subwoofer

The MTX RTF10AS subwoofer is an ultra-flat, sealed-load subwoofer with a 25cm, 4Ω subwoofer. It handles over 300W RMS and 900W Peak, which is exceptional given its shape. Its small size allows it to easily fit behind a seat, under a seat, or in a trunk. And of course, it takes up little space compared to the radical change it provides in terms of sound. Despite its small dimensions, it adds a significant amount of bass to the installation, which instantly makes the reproduction more pleasant and more musical. It's more comfortable and less aggressive. One of the great qualities of this subwoofer is that it doesn't make its particular shape felt. When listening, there is almost no difference compared to a conventionally shaped subwoofer. And that's a real feat! We recommend using the MTX TX2275 amplifier as a bridge to power this subwoofer.

• Ultra flat and very small, it fits anywhere
• 25cm subwoofer for ample and powerful bass
• Exceptional power handling (300W RMS and 900W Peak)
• Sealed cabinet and subwoofer optimized to work together
• Solid 16mm MDF construction, rubber gasket, push-in terminals...
• Thanks to an incredible x-max, it works like a conventional box
• It is impossible to make more serious sounds given the reduced size.
• Ultra competitive rate
• Recommended amps: MTX TX2275 TX2450 TR275 TR450 TX480
• Flat closed box
• 25cm (10") subwoofer
• CEA RMS power: 300W
• Peak power: 900W
• Impedance: 4Ω
• Sensitivity: 91dB/2.83V/1m
• Response: 29-300Hz
• Weight: 10Kg
• Dimensions: 34x48x13cm