Item Weight | 8.8 ounces |
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Product Dimensions | 7 x 1.9 x 5.6 inches |
Country of Origin | China |
Item model number | IS31 |
Is Discontinued By Manufacturer | No |
Warranty | One year |
Height (inches) | 5.5 inches |
Weight | 17.01 g |
iSimple IS31 Antenna Bypass FM Modulator for Factory or Aftermarket Car Radios
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Purchase options and add-ons
- Universal aux audio input for all FM radios
- Simply flip the switch.Selectable operating frequencies 87.9 MHz and 88.3 MHz
- Enjoy the clear, clean audio, Car radio aux input has a sleek, compact design
- Antenna bypass FM modulator, Play almost any portable device directly through your radio
- Audio connections and docking cables sold separately
- Universal aux audio input for all FM radios
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Product information
Technical Details
Additional Information
ASIN | B002U5XPBE |
---|---|
Customer Reviews |
4.2 out of 5 stars |
Best Sellers Rank | #31,702 in Electronics (See Top 100 in Electronics) #8 in RF Modulators |
Date First Available | May 15, 2009 |
Warranty & Support
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Product details
- Is Discontinued By Manufacturer : No
- Product Dimensions : 7 x 1.9 x 5.6 inches; 8.8 ounces
- Item model number : IS31
- Department : Electronics
- Date First Available : May 15, 2009
- Manufacturer : iSimple
- ASIN : B002U5XPBE
- Country of Origin : China
- Customer Reviews:
Product guides and documents
WARNING:
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Product Description
Antenna Bypass FM Modulator
Important information
Legal Disclaimer
I AM NOT A AUTHORIZED RESELLER I HAVE THIS ONE ITEM TO SELL FROM PRIVATE PURCHASE
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Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the performance and ease of installation of the phone. For example, they mention that it works well, and is fairly easy to install. Customers are also satisfied with the value. That said, some complain about distortion and gain adjustment. Opinions are mixed on sound quality, quality, and static.
AI-generated from the text of customer reviews
Customers like the performance of the phone. They mention that it works well, sounds perfectly clear, and functions normally. Some say that the inexpensive device works great and gave their sound system a new life. Overall, most are satisfied with the performance and functionality of the product.
"...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..." Read more
"...The IS31 is a great product and almost perfect. For someone that didn't have an auxiliary in, this has suited my needs well...." Read more
"...Worked perfectly!..." Read more
"I bought this product and installed it myself. It works great and was not terribly difficult for a novice (like myself) to install...." Read more
Customers find the installation of the phone fairly easy. They mention that the wiring is pretty easy if you're a DIY king.
"...I wanted an inexpensive, easy, install and go solution to accomplish this, and this modulator delivers...." Read more
"...Installation was fairly simple...." Read more
"Easy to install and leaves a clean factory dash" Read more
"...It works great and was not terribly difficult for a novice (like myself) to install...." Read more
Customers like the value of the FM modulator. They mention that it is a great buy, with superb quality for a minimum price.
"...I wanted an inexpensive, easy, install and go solution to accomplish this, and this modulator delivers...." Read more
"...It does require some installation work, but it's definitely worth it. I have been using it for over a month with absolutely no problems...." Read more
"...All in all, 100% worth the price...." Read more
"...It's definitely worth the price. However, I had to knock off a star because it seems very susceptible to interference...." Read more
Customers are mixed about the sound quality of the phone. Some mention that the sound is crystal clear, and has not experienced any loss in FM signal. They say the device preserves more bass from the audio signal, and there is no noise or static when it is connected and tuned to the radio. However, others say that the audio quality is reduced, the volume is slightly decreased, and it's a bit quieter than your usual radio stations.
"...directly into the antenna input on your stereo head unit, the sound quality is superb...." Read more
"...I really have no interest in replacing this unit, as it sounds just fine, and I'd prefer to keep my vehicle looking stock to avoid the attention of..." Read more
"...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..." Read more
"...of the reviews said that it would be no problem, and that it sounds pretty decent, so I figured I would buy her an early Christmas present and..." Read more
Customers are mixed about the quality of the phone. Some mention that it works as advertised, has decent quality, and is almost CD quality. However, others say that the hardware quality does appear to be sub par, the range is limited, and the product is not very heavy duty. Additionally, some customers also mention that the product decreases the quality stations near the set frequency when it's on.
"...This little unit is a great device to add an input to your factory stereo...." Read more
"...tape route for a brief period of time, only to find it to be largely unreliable. So I decided to keep looking...." Read more
"...It sounded much better than the radio, almost CD quality. I was blown away by how well this sounded, so I bought one for my car...." Read more
"...my experience, this product serves its intended purpose, but is not without flaws...." Read more
Customers are mixed about the static. Some mention that the sound is crystal clear, with no static or interference. However, others say that the volume is reduced by 30% and constantly has some level of static. The static starts to arise very quickly, and it adds static to every station.
"...and they all have terrible audio quality, battery noise, and trouble fading in and out during a road trip. This thing is totally different...." Read more
"...I can't hear any static even with broadcasting silence (no signal) with the radio volume turned up to more than 75%...." Read more
"...It turns out the unit was faulty (it faded to static after about 5 minutes; you should be able to hear the stations in the background when the unit..." Read more
"...The sound quality is great---no hiss, no static, no distortion, no muffling---just clear, clean music...." Read more
Customers are dissatisfied with the distortion of the phone. They mention that it interferes with the signal, reduces the signal strength, and degrades the reception. The reception degraded beyond what was acceptable, and the output signal can overpower any frequencies within a couple MHz of the device.
"...FM transmitters have a short transmission radius, the antenna was always too far away to be effective...." Read more
"...I did pick up a little bit of interference while driving at one point, very briefly...." Read more
"...The main issue is that when the iSimple is on, it reduces the signal strength of ALL radio stations, not just the frequency you've selected on the..." Read more
"...Lastly, the antenna rendered one favorite FM channel useless as it goes in and out...." Read more
Customers are dissatisfied with the gain adjustment of the phone. They mention that it wouldn't go high enough to match over the air stations, it's tough to get the gain just right, and the range of the gain is barely adequate. Some say that the knob was broken.
"...calibrating sound levels between multiple devices, it is tough to get the gain just right. Adjust it too high, and everything will pop...." Read more
"...You do have to crank up the gain, at first I had to have the source and radio both nearly full volume to get moderate sound...." Read more
"...My only gripe is that the gain would not go high enough to match over the air stations...." Read more
"...It broadcasts to two selectable frequencies (87.9 and 88.3) and installs between the vehicle's antenna and the car stereo...." Read more
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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.
This little unit is a great device to add an input to your factory stereo. If you don't want to spend a bunch of money on a new deck and installing it, this this is the way to go. When I recently got a 2001 Grand Am, as my daily driver, I didn't really want to switch out my nice Pioneer DVD deck from the other car to this. Too much hassle and in the end, all I really wanted was an easy and clean way to bluetooth stream my phone's music to my radio.
This works do to that. I wanted my phone audio, through bluetooth connectivity, automatically - without any plugging in cords every time I got in the car. I didn't want a lot of wires hanging around. I also didn't want to have to worry each time I got in the car of having to press buttons, plug in things, and get things set up before each trip. I wanted an inexpensive, easy, install and go solution to accomplish this, and this modulator delivers.
Note: volume is slightly decreased, but that's a fine trade-off for the price!
So here's my set-up:
I had my factory radio which I didn't want to change out. The Grand Am has a decent enough Monsoon factory sound system that I was okay with. What I decided to do was run a bluetooth connection to the FM modulator that ran the audio to the radio. I bought one of those bluetooth receiver (one of those round ones with the buttons on it and a microphone on it) and hardwired to the switched power from the car using a 12v to USB adapter. Now that the bluetooth receiver was connected and powered anytime I started the car. The audio cable plugged directly into this FM modulator. The audio then passes through this unit and directly into the antenna feed that goes to the back of the radio. For the GM stereo, I had to get two adapters for the antenna. One, that went from female mini to standard male, then to this FM modulator, then the standard male out to the other adapter which converted the size back down to the mini plug, which went back into the factory radio.
Now, when I start my car, the bluetooth automatically powers, connects to my phone, and launches pandora (through tasker and a BT connection event)... instant and handsfree music every time!
Know, that with this unit, you'll need rca plug-ins. There is a level adjustment on the box, but you'll want to turn that all the way up as volume levels decrease though the unit.
Overall, a great little device that fit my situation! Hands-free, with a built in microphone from the bluetooth device, automatic music through the stereo. The only extra wires that are on my dash is just the short one coming out that goes to my bluetooth receiver. Everything else is behind the dashboard trim.
Top reviews from other countries




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
