You listen to your iPod and satellite radio in your car, so why not while cruising on your boat? Poly-Planar's IC-3.5PM adapter cable lets you connect your MP3 player, iPod, or satellite radio to any Poly-Planar audio device with RCA inputs. The 50-inch cable sports RCA male plugs on one end, with a waterproof panel/dashboard mount on the other end.

Poly-Planar also includes a 4' stereo headphone jack extension cable that plugs into the dashboard mount, so you can move freely around your boat with portable player in hand. Warranty: 2 years.

Poly-Planar IC-3.5PM Reviews

Average Customer Review:

10 reviews
Review this product
Great Gear Giveaway

Submit a review and then enter to win a $350 rewards card


Review this product:

Thanks for taking the time to share your experiences about this product. Please be sure to focus your comments on the product itself. Read our Review Guidelines for more information.

Your email won't be visible. Please use the email address that is associated with your order.
(e.g., JohnD) Your review will be signed using the display name and location
(e.g., Charlottesville, VA)

Click on a star to rate the overall product on a scale of 1-5
1500 characters left
  Attach a YouTube Review
Crutchfield Video Review Guidelines
  • Only submit videos that you made or are authorized to use.
  • Do not submit videos that contain music, video or visuals that are copyrighted and belong to someone else.
  • Please see our Review Guidelines for more information.
500 characters left
500 characters left

easy install

Written By NateT, Boise, ID on Friday, May 10, 2013

Crutchfield Customer Review (What's this?)

Easy Install, Works well.

Great Produc to Customize your Vehicle.

Written By Marciano516, San Francisco, CA on Tuesday, April 23, 2013

Crutchfield Customer Review (What's this?)

Great Produc to Customize your Vehicle. After completing it on my GF's Civic becaue they had broken into her car 3 times for her stereo I decided to put a 4ch Amp with this input and a USB charger only. She likes it alot and she always has her MP3 or Phone playing on her car, and it helps becuase now it's always a hands free.

Pros: Easy to install.

Cons: Easy to install If your a handy person

Simple and works.

Written By Jim, Idaho on Monday, April 15, 2013

Crutchfield Customer Review (What's this?)

Not much to it. Drill a hole, mount it, plug it in, and it works.

cool device

Written By HL, ATLANTA,GA on Sunday, March 04, 2012

Crutchfield Customer Review (What's this?)

Cool device, allows for seamless custom install. If you plan your work you can make it look factory.

Pros: good tight fit.

Cons: none.

Poly-Planar IC-3.5PM

Written By PhillW, Fairfax, VA on Thursday, April 07, 2011

Crutchfield Customer Review (What's this?)

This cable package works real well with the Aux Adapter to run my iPod through
my car stereo. The cable allows for a real clean installation.

It's not just for boats....perfect for a Harley inner fairing as well

Written By Mike, New Hampshire on Tuesday, December 28, 2010

Crutchfield Customer Review (What's this?)

I bought one of these 5 years ago, it is still in perfect working order,but has some fading
from being out in the weather mounted in the inner fairing of my harley electra glide..

I used this adapter to bring audio from my Garmin Zumo 550 into the back of my sony
CDX-5710 stereo mounted in the dash of my electra has always worked
perfect and looks great mounted as reason for ordering another is purely replacing the inner fairing on my harley because of sun fade,and wish
to have a brand new adapter installed with all the new parts im replacing.

Crutchfield is a great source for this item,fair price,great shipping prices,fast delivery !!

be it car/truck/boat or motorcycle.................this adapter is perfect and simple to install !

Worked great

Written By Kyle, Texas on Friday, November 05, 2010

Crutchfield Customer Review (What's this?)

I replaced the cigarette lighter in my 2006 Chevy Avalanche with this jack, it
came out great. I now have a factory-looking auxiliary input in my truck and
didn't even have to drill a hole in my dash.

The jack itself seems solid as well, the included cable (which is also decent
quality) fits it snugly and makes a crisp, positive "click" when inserted. The
weatherproof cover is also a nice touch, but I didn't use it.

Poly-Planar IC-3.5PM

Written By JoeG, Islandia, NY on Thursday, August 19, 2010

Crutchfield Customer Review (What's this?)

Great product. It was easy to install and it looks great. I can now listen to satellite radio on my boat without any static or interference.

meant for a boat but looks great in a car too

Written By shawndoggy, Reno, NV on Tuesday, March 02, 2010

I bought one of these to install on my boat, but ended up using it in my F-150 install instead. In my 05 F150 there wasn't an external aux input in the dash, but the aftermarket pioneer deck I installed had one. So I drilled a hole in my dash and installed this, right between the cig lighter and the backup sensor button. If you didn't know better you'd swear it's factory. I did remove the rubber gasket/seal because it didn't really seem appropriate inside the truck. I'm buying another for the boat now!

Great Product

Written By Mike, Crystal Beach, TX on Wednesday, January 30, 2008

Crutchfield Customer Review (What's this?)

I bought the Poly-Planar to install in a Sprinter van along with a Blaupunkt audio OEM cable so that I could listen to MP3's from a standard player or Ipod.

It works great and has a nice finished look. I thought I would need to create my own 3.5mm jack assembly with a cover but the Crutchfield helpdesk person told me about the Poly-Planar which turned out to be better than I had hoped for. As a bonus, it comes with a 3.5mm patch cable to hook to your device.

Definitely recommended.

Hands-on research

What's in the box?

Download owner's manual

  • 50" Stereo male RCA to 3.5mm female connector
  • 48" Minijack cable with a male 3.5mm connector on each end

Product Research


MP3 Adapter: The Poly-Planar MP3 adapter is 50" long and features stereo RCA male connectors on one end and a mountable female 3.5mm minijack plug that uses a waterproof rubber protection plug on the other end. The adapter allows you to connect a portable MP3 or other portable audio source that uses a 3.5mm minijack output to one of Poly-Planar's marine expansion amplifiers (MZ-100 or ME-50, separately) through the amps stereo RCA preamp inputs. The panel-mountable 3.5mm plug requires a 3/4" diameter hole for installation and features a plastic nut to secure the plug in place.

Extension Cable: The MP3 adapter also comes with a 48" minijack extension cable that features a 3.5mm male minijack connector on each end. One end plugs into the MP3 adapter's panel-mount plug while the other end plugs into the headphone or audio output of your portable MP3 player.




Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.