Hidden Bluetooth Audio for Any Car

The Mark Series

The Mark Series specialize in discreet, high-quality hidden car audio, hidden stereo systems, hidden audio, and Bluetooth audio solutions. Whether you’re looking for a custom radio, vintage car radio repair, or a seamless Bluetooth integration for your classic car, we’ve got you covered. Our solutions work with all types of vintage and modern vehicles, providing you with the perfect hidden audio system to suit your needs. No radio needed—just simple, hidden audio control.

Our systems work with Apple and Android phones and tablets for effortless control, all while maintaining your vehicle’s original look. See us for all your hidden audio needs!

How it works

  • No Radio Required: You don’t need a car radio to enjoy hidden audio – our system works without one.
  • No Working Radio Needed: Even if your existing car radio is not functioning, you can still add modern audio features.
  • Add Bluetooth Audio: Our device integrates Bluetooth audio into most existing audio systems, allowing you to stream music wirelessly.
  • No Exposed Components: The system is completely hidden and requires no external access, preserving the original look of your vehicle.
  • Simple Control: Control your audio system easily using your smartphone, MP3 player, or tablet – no need for additional remotes or controls.
  • Discreet & Secret Audio Solution: A simple, effective alternative to bulky, visible audio systems.
  • Cost-Effective Classic Car Upgrade: A budget-friendly way to modernize your classic car’s audio system without sacrificing its original charm.
  • Maintain the Classic Look: Enjoy modern audio without any need to modify your car’s dash or interior.
  • Versatile Voltage Compatibility: Works with 6V to 24V electrical systems and is compatible with both positive and negative earth vehicles.
Features

2 Channel Output (Speakers)

4 Channel Output (Speakers)

RCA Output

Hands Free Calling with Mic

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TESTIMONIALS

“I am detailing my Mercedes Gullwing right now at Pebble Beach with four other guys and we are listening to tunes on your Out of Sight Audio Mark I off my phone. Awesome!”

John P.

Mercedes Gullwing

“I installed a Mark I in a positive ground 6 volt system on an original survivor ’55 Thunderbird. The car came from the factory with no radio, so when the Mark I was activated it was the first time in 59 years sound had emanated from the dashboard speaker. Although the installation instructions were clear and easy to understand I called the home office with a elementary question just to be on the safe side. My call was returned promptly and dispatched with efficiency and courtesy, as well as the initial order (ordered on Friday and it was in my hands the following Monday!). This is a amazing product and a fine value. No hacking or other unpleasant modifications necessary – its diminutive size means it can be tucked away easily and its audio fidelity is only limited by the quality of the speaker(s) its connected to. This install was for a friends car – but I have two ’59’s (a V.W. and a Thunderbird) that are next on the list.”

Mike

Thunderbird

“I ran into Matt at the RM Auctions America car Auction at Auburn Indiana and saw the wireless Mark I, II & III setups. At the time I was looking for a hidden audio system for a 1948 6 volt Willys Jeepster and gave a Mark I a try. It was perfect for the application and allowed me to stream and control directly from my iPhone. I have since picked up a 1962 24 volt Dodge Power Wagon truck and purchased another Mark series unit for this application. By being hidden it allows me to keep the original look while I have modern tunes in the truck. Along the way I have had a couple of questions and Matt has always been quick to answer and support the products. I highly recommend the Mark systems. Keep up the good work!”

John S.

Dodge Power Wagon Truck