IS31 Antenna Bypass FM Modulator for Factory or Aftermarket Car Radios

Brilliant little device. No external noise from antenna input and it is very very easy to install. Hardest part of the install was to route the wires through the car! Gain adjustment on the unit is very handy and works well. I bought the isimple auxiliary connection kit for this as the finish on the auxiliary input was very clean and looked professionally done in a few seconds. Would recommend highly.

My Dad has a Jaguar X Type, it has Bluetooth for Phone Calls but not for Audio, there is also no 3.5MM Aux Port either. He's been using a Bluetooth FM Transmitter for the past few months but the signal goes crackly quite frequently so he bought this, took an afternoon to fit and works perfectly.

First one I had was faulty but the return was fast and after that it worked perfectly on my brother's car. Sounds great!

wow so simple. made a massive difference to the radio on my bike! highly recommend.

It's ok, but that's a good as it gets. Better than other FM transmitters but nowhere near the quality of a dedicated aux in. Would I buy it again? Probably not, does it work? Sort of with the volume cranked up but expect some interference and a very average sound quality.

有線でFMのアンテナに繋いでいるので、非常に安定しており、トランスミッターである事を忘れるくらい音質にも満足しました。

El aparato tiene buena fidelidad y excelente calidad. Hagan la instalación de manera correcta y como se indica así no tendrán ningún problema, conecten adecuadamente la tierra ya que me hacia un poco de ruido hasta que lije el material que me sirvió para anclar.

Installed it on a 2003 Ford Taurus SES. Bit of a pain to install (no fault of iSimple, just how the car is laid out/built) but once I got it in and working, it works quite nice. I can't hear any static even with broadcasting silence (no signal) with the radio volume turned up to more than 75%. And the audio quality when broadcasting a signal is pretty good. Just make sure you don't turn your iPod/Phone volume up too much or you'll overload the input of the IS31 and get a lot of what sounds like static but is really audio signal clipping on the input. Its also a bit quieter than your usual radio stations, even with the IS31 gain settings at max so you'll probably need to turn up the radio volume to a higher setting than usual when listening. First things first thou. If you're going to install it, you should your research before actually doing the install. And be comfortable getting your hands into all those wire harnesses with wire clippers. Here's my experience and notes with my install on my Ford Taurus. The antenna plug that the IS31 plugs into is in the trunk, behind the driver side wheel well covered up with that molded carpet/felt. This antenna port is on some sort of remote amplifier unit that communicates with the instrument control panel up front. If you want to install this unit in the trunk (which I did), you'll need to splice into the wire harnesses that run into the unit. And you'll need to look up the important wires to splice into for power which was a real pain as there's up to 3 wire harness connectors in the back and I had to splice into two different ones (12V always hot, left most harness - red/yellow; Audio System On signal, middle harness - light green/black). I also added a power mosfet (IRF510 if you care) into there to act as a switch using the Audio System On signal as a logic signal (could use a relay as well) so my IS31 automatically turns on whenever the radio turns on and it turns off whenever the radio is off. You could probably skip a switch if you don't care about the power drain while the car is off or you're not worried about overloading the Audio On signal line (I have no clue how much current that line will support). I then ran a standard 3.5 mm to RCA 25 foot adapter cable from the trunk, along the doors and under the trim, under the dash, to a location up front which is easily accessible for hooking up to a phone/ipod, etc. I left the actual on/off switch in the trunk (pretty much always stays on) as it doesn't seem to interfere with radio reception aside from the intended FM channel picked for modulation. I can listen to all of the FM radio stations I care about while the unit is on. I also had to buy a Ford Antenna Kit ( http://www.amazon.com/gp/product/B00009UHHW/ ) because the existing antenna port was some proprietary Ford connector which didn't fit the iSimple universal plug. Make sure you get a kit that has both of the adapters as you'll need one to go from the Female Ford Antenna Connector -> Universal Female Antenna Connector and another to go from Universal Male Antenna Connector -> Male Ford Antenna connector. Took me a couple of hours with a wire cutter, wire stripper, soldering iron, multi-meter, electrical caps, electrical tape, and a bunch of wiring diagrams to install. And a fair amount of research to figure out where everything was and how to wire everything up. Much more of a pain than I expected originally but its working well with no complaints and its pretty much invisible, can't even tell its installed with the exception of a 3.5 mm plug up front. I also never had to pull out the radio unit. All of the wiring was done in the trunk and pretty much just sits between the body and the molded carpet lining.

Simple to install and use. Instruction well written and easy to follow Could do with a liitle more gain on the output, but this may also be due to the limiting of the output from the tablet used as the source. Does allow me to keep the car audio interior original and have benefits of modern mp3 players

Bought this to install with my old school Alpine cassette deck. The item looked / felt well built and was easy to install. Worked well with my RCA adapter, and my ipod nano. sounded great. I like the option to install the switch. I hope it lasts.