If you have a retail store already selling in the USA (physical or online) you can become a Stetsom Authorized Seller.

All you have to do is fill in your contact and store information in the form "Become a Dealer" and we will get back to you as soon as possible.

Yes, recently Stetsom Brazil opened its new company in the US called STETSOM USA, to better serve their North American Customers.

You can Chat with us in our available time or leave a message at the Contact page.

No sorry. We currently work with domestic US shipping only.

It depends on where you are. Orders processed here will take 5-8 business days to arrive. Delivery details will be provided in your confirmation email.

We use all major carriers, and local courier partners. You’ll be asked to select a delivery method during checkout.

Stetsom USA is not available for walk in, local pick up at this time. All items must be purchased online and shipped to their final destination.

We take every precaution in our extensive checks and balances shipping procedures to ensure your order is pulled and shipped to you correctly. On the rare occasion this happens, please contact us immediately. We may ask for your order information, as well as photos of the items you received to determine next steps to get this corrected immediately.

We always aim for make sure our customers love our products, but if you do need to return an order, we’re happy to help. Just email us directly and we’ll take you through the process.

We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.

You can find more about our Return policy at our Shipping Policy.

We ask that any and all original packaging for your item(s) be sent back with your return. Please make sure you package your items securely and safely so that they would return to us in working order.

We recommend having the gain tuned with a multimeter to ensure the correct power output and DD1 or O scope in order to ensure that the amplifier is not outputting any distortion or clipping to the subwoofer(s).

Clipping is a form of waveform distortion that occurs when an amplifier is overdriven and attempts to deliver an output voltage or current beyond its maximum capability.

The Maximum Musical Consumption parameter is recommended for the audio device project because it represents the minimum amperage needed to achieve the best output and productivity when performing a tune.

When the amplifier is put into a resistance test for an output charge that does not vary at high temperatures and a constant frequency signal, the Maximum Sinusoidal Consumption is taken into account as a parameter.

This occurs because any Class D (digital) amplifier has a power supply with high-frequency switching, which can interfere with long-range FM signals. To avoid interference, prioritize local radio stations because their signals are stronger.

Another alternative is to mount the digital amplifier independently from the initial vehicle wiring, with the powering cables (positive and negative) taken straight from the battery and a well-shielded RCA (as short as possible) to prevent both resulting in a kind of antenna.

Noise that interferes with the FM signal is common on all class D amplifiers, regardless of manufacturer. Depending on the model, high-frequency switching from the amplifier's power supply leads to the development of more reliable amplifiers with lower consumption and higher power.

Here are a few tips to help you reduce this kind of interruption even further:

– Remove all contact between the amplifier and the car chassis;

– Lock the power cables and pull them straight from the battery to the low power amplifier (this benefits the FM signal);

– Determine the best location to attach the amp inside the car, and if it's RCA, use the shortest cable possible with high-quality shielding.

– Make good use of the high-performance CD player and antennas. This removes the possibility of FM signal interruption.

– Braiding the output wires to the speakers with the aim of canceling out high frequencies will also help.

You can contact us through our Contact page! We will be happy to assist you.