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Important note: This adapter can not be used in conjunction with any directly connected XM or SIRIUS satellite radio.

Talk on the phone hands-free with your compatible Alpine stereo and the KCA-100BT Bluetooth adapter interface. It works with 2004-up Ai-NET Alpine stereos, allowing you to make and receive calls via your Bluetooth capable cell phone.

A one-time process prepares your phone for use with the KCA-100BT. Once the system has been set up, the Bluetooth connection initializes automatically as soon as you get in the car. From there, you get the safety and convenience of a mobile speakerphone.

The KCA-100BT includes a call control button that mounts on the dash, allowing you to pick up and end calls with one-touch convenience. A visor clip microphone is also included. Warranty: 1 year.

Note: If you're planning on adding this Bluetooth adapter interface with a system that includes a direct-connect XM or SIRIUS satellite radio purchased before June 2006, please call 1-888-955-6000 before you buy for compatibility information.

Note: Bluetooth compatibility with this device may vary, depending on your phone and service provider.

Alpine KCA-100BT Reviews

Average Customer Review:

15 reviews
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Great product in theory

Written By Austen, North idaho on Friday, January 30, 2009

Crutchfield Customer Review (What's this?)

The bluetooth was easy to install and it instantly linked up with my phone. Makes call very easy but everyone i talk to tell me it sounds like im in the back of a cave and i sometime have to move the mic closer. All in all its a great idea would have got the newer one but my 9856 doesnt work with it

Picked up too much interference

Written By tombuon, Westmont, IL on Saturday, May 31, 2008

Crutchfield Customer Review (What's this?)

This product worked well in every regard except for its most important one -- the mic. It interfaced very nicely with the HU, it transitions from audio to call through my iphone very smoothly and callers sounded very clear on my end. But the mic, even after optimizing it's position relative to the user, picked up a terrible amount of electronic interference. I tried two separate units and both exhibited identical problems. Callers heard an obnoxious amount of buzzing. I've returned them and substituted a headset with a car charger. I don't know whether this problem was the unit itself, or poor shielding elsewhere in the car, but nothing else is currently picking up such terrible interference.

Alpine KCA-100BT

Written By James, Wellington, CO on Tuesday, May 27, 2008

It pairs with all of my
cell phones just fine, but doesn't work correctly. Sometimes the audio
works, other times no. When it does work, it's bad. There just isn't
anything good to say about this unit at all. Called Alpine tech support
mulitple times and the final answer: All 7 of the cellphones I tried to use it
with are bad. I welcome you to do the math on that probability before
purchasing this unit. I am selling off all my brand new alpine stuff,
headunit, this product, USB interface and switcher unit and buying another
brand. After 15 years of owning nothing but Alpine, I sadly have to say
these latest units are terrible.

Alpine Bluetooth

Written By Len, Phoenix, AZ on Sunday, December 10, 2006

Crutchfield Customer Review (What's this?)

I am running an Alpine 9857, four channel and mono amps, component speakers and sub. I researched hands free units and decided the dedicated Alpine was the most trouble-free way to go, ( no hard wiring). I was aware of the negative reviews, as well as the limitations of this unit before purchasing. I use my head unit in conjunction with an I-Pod and don't have a CD changer or satallite radio. My job involves a lot of driving and phone communications enroute.
My phone is a Samsung SCH-a870 with voice command. If I ever need to investigate a call or the phone display screen, I'll stop the car and use the phone. This has not been an issue in the past. Bottom line, unit works on the fly, no frills, and works great for my purposes. Installation is a piece of cake and reception is good, (both ways). Only thing that shows is the face of the remote custom mounted in dash panel.

Poor design,

Written By James, Barrington, RI on Sunday, October 29, 2006

Crutchfield Customer Review (What's this?)

Same as others. Killed my Sirius radio on my IVA-D901. Sound quality is horrible.

For Alpine, this one falls short.

Written By iwasnevy, Denver, Co on Monday, September 25, 2006

Considering Alpines impeccable track record in the high-end mobile audio arena, the KCA-100BT Bluetooth module is a sore disappointment.
I purchased the KCA-100BT specifically because it interfaced with my Alpine head unit. Although the instructions were minimal, Installation was a breeze - I simply plugged it into the back of the stereo, hooked up a mute wire, clipped the microphone to the sunvisor and mounted the remote button. Pairing to my Motorola RAZR went as smoothly as the rest of the installation. I soon discovered, however, that its performance and features were limited.
Coming from Alpine, one would expect at least the caller ID to be displayed on the radio face, but "Interrupt". Is all that shows when the phone is in use. The microphone was very weak and seemed to pick up too much background noise, which was confirmed by several test calls and subsequent research on the internet. When speaking loudly, preprogrammed numbers from the telephones address book could be voice dialed, but it oftentimes took two or more attempts to get it to recognize a name. The receiving parties repeatedly had trouble hearing the conversation and occasionally heard their own voice echoing. Alpine released a software update in mid-summer to fix a voice echoing problem, and even though this was one of the updated units, it still didnt perform well enough to carry on a reasonable conversation.
The only thing accomplished by purchasing this integrated unit was to pipe the telephones sound to the vehicles speakers via a connector instead of a few extra speaker wires. This unit did nothing that any other hands free kit could do, and its performance was worse than its counterparts

Doesn't work with other Ai-Net devices

Written By RobertYJ, San Francisco, CA on Thursday, August 31, 2006

I already have an iPod and XM radio hooked up to my alpine head unit's AI-net port. To add this interface, I had to purchase a 'versatile interface unit' which is anything but versatile. It forces you to choose between either the bluetooth interface or the ipod/XMradio which sort of defeats the point of buying the Alpine unit. Plugged straight into the head unit in works fine but I cannot - even after talking at length to both Crutchfield and Alpine - get it to work with the iPod and XM interfaces.

Works Great for Me

Written By Sandy, New York, NY on Saturday, August 26, 2006

Crutchfield Customer Review (What's this?)

While the reviews seem mixed, this unit works great for me. I have the CDA-9867 head unit w/ iPod adaptor (who needs to pay for satellite when you have enough music to get you across the country and back.) While the instructions leave something to be desired, once you lay it all out, it's a very straight forward installation. This comment is also true for operation. Incoming call quality is great. I've had a few compaints about outgoing quality, but think it may have more to do with the connection. I mounted the mic off the overhead accessory consoule. It was tucked away, but quality suffered, so I have it dangling and it seems to have solved the problem. One other nice thing is that you do not have to use voice dialing (despite the way the packaging makes it sound.) I use this with a Nokia 3650.

Mediocre Implementation

Written By Calvin, Boston, MA on Thursday, July 27, 2006

Crutchfield Customer Review (What's this?)

Other reviewers have touched on all of these points. Here is my take:


Easy to install and set-up
Great in-coming sound quality
Auto mute on Alpine IVA-W200 head unit


Microphone pick-up is weak. I sound like I'm 20ft away with the microphone as close to my mouth as it can practically be.

ZERO information passed from the phone to the head-unit display

Shows up as a CD-Changer on the head-unit menu, wants to behave like an MP-3 player on the Head Unit.

If you don't absolutely have to have this unit, don't buy it! Wait and see if Alpine comes out with a better unit!

My Set-Up:
Treo 650 (Cingular)

Overall Pretty good

Written By Cliff, West Chester, Oh on Monday, July 24, 2006

Crutchfield Customer Review (What's this?)

I must say that Alpine really wasn't putting a lot of thought and money into this creation. Its nice to not have to hold your phone but really you can manually press mute and awnser the thing on speaker phone for what this does. My setup is an Alpine IVA-D310-->TUA-T020XM-->MRA-D550 Multi channel amp --->KCA-100BT. With Infinity Kappa Speakers and Sub. Everything sounds and works great connected to my I870 Nextel. I called Alpine to make sure. They were very helpful. If you read what it is supposed to do it does it to Alpines Quality standards. I just wish they would have allowed you to do more with it (caller id, Phone book)for 199.99. I I still haven't found a streaming bluetooth audio device that I like that will work with the system. I am going to try my PDA today with windows media player. Of course Alpine will come out with a better unit that will have made me waste $200.00 by next year...hopefully they will make it a software upgrade on the head unit.

Works great oncw set up

Written By Churchfields, East Meadow, NY on Tuesday, July 18, 2006

Crutchfield Customer Review (What's this?)

If you take your time and call Crutchfields support for help the bluetooth works great. I set it up with the Alpine CDA-9857 and is the only item setup on the ai-net. You will have to purchase a adapter to support aditional items such a CD Change. Also insure you have a voice dialing phone. this way all you do is press one button to make it work.

There are better options

Written By ghaith, Los Angeles on Monday, July 10, 2006

I bought the Alpine 9856 just for the bluetooth feature. The first thing was I wasn't told that this bluetooth system wasn't going to be available till now. I finaly bought it and put it in to find out that it's not compatable with any XM or Sirrius unit. It only has one button for answering and hanging up. You can only turn the volume up to about "7". If you turn it up any louder the caller will hear an echo of themself. Not to mention that "7" being the maximum you can go makes it difficult to hear your caller while driving due to road noise and such things. The sound quality of your voice on your callers end is very poor. Caller's complained I sounded too far away. Does not display any caller i.d.

It might be a great unit but I will never know !!

Written By chris, Saratoga, NY on Monday, July 03, 2006

Waited 3 months to get this module only to find out that if you do have an Alpine XM or Sirius receiver, this module will not work. Why not tell people (Alpine CS or website) interested in this unit that there are some compatability problems. Too bad I really like my Alpine Iva-d100 headunit with ipod & Sirius sources.

Alpine KCA-100BT

Written By brian, Torrance, CA on Friday, June 30, 2006

I have this unit with the W200 Head unit. I have had this product for about 2 months now
-Easy to use, just one button
-Convenience of not having to find my phone and drive with one hand on the freeway
-Automatically mutes the stereo for incoming calls and outgoing
-Will not display the phone number on the head unit for incoming call
-Cannot look through address book from the head unit
-It takes a while to tune the stereo so the other person on the phone can not hear them self
-Remote feels flimsy
-Implemented poorly (the head unit thinks it is a CD Changer)

If your phone does not support voice dialing I do not suggest getting this. I called alpine and asked them about this device and they told me that they designed the unit to work with other head units not just the Multimedia units. But last time I checked the other units that are Ai-Net enabled have Alphanumeric screens on them. So why will it not tell me who is calling. That is my main complaint all it shows when a call comes in is a little red phone. My guess is they will come out with one that does what I want next year and it will not be compatible with my head unit.

Compatibility Issue

Written By Fitz, Boston, MA on Saturday, June 17, 2006

Warning! This will not work if you've hooked a SIRIUS SIR-ALP1 Satellite Tuner into your Alpine head unit. There is only one "AI-NET" jack on the back of my Alpine CDA-9857 head unit. Both the tuner and this KCA-100BT Bluetooth require the same jack! There's only room for one! I found no documentation describing this previously. Don't buy this if any of your accessories are currently using the "AI-NET" input on the head unit. I can only speak for the Alpine CDA-9857.

Hands-on research

What's in the box?

Download owner's manual

  • Bluetooth module with attached Velcro pad
  • 10' Ai-NET cable (has 22-pin Molex connector on one end and 3 cables (microphone/remote/tele mute)
  • 3-Button remote with attached 9.75' cable (6-pin Molex terminal)
  • Microphone with attached 9.75' cable (2-pin Molex terminal)
  • Visor clip
  • Microphone clip
  • Velcro pad for microphone
  • Self-tapping screw (3/8" length)
  • Dual-sided foam tape
  • Owner's Manual (English/French/Spanish)
  • Customer Care Registration card
  • Application notification sheet

Product Research


Overview: The Alpine KCA-100BT Bluetooth Interface allows you to make and receive calls on your Bluetooth-equipped cellular telephone and Apple iPhone through a 2004-up Ai-NET equipped Alpine head unit. The interface includes a microphone and a 3-button remote to assist you in making and answering your calls.

Bluetooth Hands-Free Telephone Feature: With the interface, you can initiate, answer, and end a call on your Bluetooth telephone without touching it. Once the interface is installed and paired with your phone, you can initiate a call by pressing a button on the remote, and dialing the number using a voice tag. Once the other party answers, you can speak to them through the supplied microphone and listen to their voice through your vehicle's speakers. During the call, the head unit mutes the current source being played so you can hear the call (head unit must have telephone mute wire).

Note: If your phone does not support voice tag functionality, you will need to dial the number on the phone handset.

Bluetooth Streaming Audio: You can also listen to Bluetooth streaming audio devices through the interface. Some devices with streaming audio functionality also have command and control protocols, allowing you to use the head unit's preset buttons for play, pause, previous track, and next track commands.

Note: The Apple iPhone does not support Bluetooth wireless music audio streaming.

Microphone: The supplied microphone allows you to use voice tags for dialing, and speak to the other party on the telephone call hands free. The microphone comes with clips and hardware for a variety of mounting options. Dimensions: Diameter=0.538", Length=1.31", Cable Length=9.75'.

Remote: The 3-button remote allows you to initiate, answer, and terminate your phone calls. You can also adjust the volume up or down with the + and - buttons. Dimensions: Width=1.302", Height=0.524", Depth=1.894", Cable Length=9.75'

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