I tried it and it did not work. I installed a regular antenna behind the passenger seat last year. It pushes down far enough where you do not see it behind the seat (especially since it is black). When I need to use it I pull it up and it works great. I would never go back to anything else.
It depends on what you want. I used to do a lot of stereo installs in street rods, boats, etc, so I've tried just about everything here. If you live in an area with strong FM signals, then FM will be OK, but not great. In areas with weak signals, expect less. AM performance is usually pretty poor with these units - if that matters to you. A regular antenna layed horizontally under the dash or trunklind will likely work better for AM and FM, if you make sure to ground the base/mount to a frame ground. A ground "plane" like a fender top wroks better - maybe you could use some footbox metal for an antenna ground and see how that works.
Another alternative - I have mine installed running front to rear on the underside of the right front fender.
Its been a while but as I recall the base is mounted somewhere on the engine side of the dash on the far side of the passenger's side so the cable would reach the tuner. The antenna then runs straight forward toward the front of the car. The tip is actually sandwiched between the bulb seal on top of the aluminum splash sheild and the under side of the fiberglass body.
I have a Pioneer head unit which is supposed to have one of the stronger tuners in terms of reception. I'd say it works just OK.
If you get one that is amplified, and make sure you have a good ground you should get as good a reception as a standard antenna mounted to the fender. The reason for the ground is to create a ground plain. Antennas don't work without a ground plain, thats why the guys that have a standard antenna just stuck under the fender don't have any AM receptiom, and poor FM reception. Also expect to spend at least $45.00 and up for a good hidden antenna. Hope this helps.
No personal experience yet to verify this but I have read in previous posts that the antenna that works the best is the amplified antenna. I picked one up at the local Pep Boys. It needs to have 12v going to the antenna plus a good ground.
I plan to drive mine into work and AM is the primary way to get the traffic reports around here. I think I may be SOL. I don't even think the radio for the cobra has AM on it.
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