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Seatbelts, knobs, wiring, small installation accessories (mounts, brackets, bezels, grills and trim parts), and items under $39 ship free on orders over $100.

Call for special pricing. We'll beat any advertised price.

Talk to a real human at 844-802-4499

Call for special pricing.

We'll beat any advertised price.

Talk to a real human at 844-802-4499

Why buy from Vintage Car Radio

  • Free shipping on radios and on orders over $100 (contiguous US)
  • 30-day returns, no restocking fee
  • Talk to a real person at 844-802-4499

Custom AutoSound Secretaudio Hidden Radio

Custom AutoSound Secretaudio is a hidden sound system for classic cars and trucks where you want to keep the original radio, or leave the dash untouched, and still have modern audio. Instead of replacing the radio in the dash, the main unit mounts out of sight, typically under a seat or behind the dashboard, and a separate control lets you operate it.

What Secretaudio Does

  • Hidden main unit with a built-in amplifier, so nothing modern has to show in the dash
  • Bluetooth for streaming music from your phone
  • USB and auxiliary inputs for other sources
  • Optional Secretaudio SST Remote for control from anywhere in the cabin
  • Plug-and-play wiring harness

Features are from the Custom AutoSound Secretaudio SST product information. Check the product page for the current version and what is included.

Who Secretaudio Is For

Secretaudio suits a concours or survivor car where the original radio must stay, a dash without a radio opening, or an owner who simply does not want any modern face showing. If your dash has a radio opening and you are happy to replace the radio, an in-dash model such as the USA-740 or USA-850, both with Bluetooth built in, is usually the simpler choice.

Secretaudio Fitment

Because the unit is hidden rather than built for a specific dash, Secretaudio is not tied to one vehicle. Before ordering, check that you have a dry, ventilated place to mount the unit, a route for the control cable and access to your speakers and 12-volt negative-ground power.

Shop Secretaudio

Questions? Call 844-802-4499. Vintage Car Radio is an authorized Custom AutoSound dealer.

More Custom AutoSound Guides

USA-230 · USA-630 · USA-740 · USA-850 · Slidebar · all buyers guides