Improve call clarity

Blaupunkt's Toronto 420 CD receiver features a built-in microphone for Bluetooth calling, but conversation can be difficult in some cars. If you drive a convertible or any vehicle with a noisy interior, adding this external microphone will ensure that your contacts hear you loud and clear. Just plug the cable into the jack on the rear of the Toronto, then place the mic in a good location. The 7.75' cord is long enough to make routing easy. Warranty: 1 year.

Blaupunkt BPTRN420MIC Reviews

Average Customer Review:

13 reviews
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A must-have

Written By Joe, Texas on Tuesday, June 02, 2015

Crutchfield Customer Review (What's this?)

This is a must-have for the Blaupunkt in-dash radios that have a built-in microphone. I tried that for about a day and it was totally worthless. I'd already purchased this external mic in advance, anticipating this problem and I'm glad I did. It made a world of difference. Now my callers tell me they can hear me just fine.

Pros: None.

Cons: None.

Ok Mic Great price

Written By JacobB, Michigan on Monday, May 04, 2015

Crutchfield Customer Review (What's this?)

Not the best mic, certainly not the worst. A huge step up from the integrated mic on the front of the Head unit. Very good price.

Pros: Price.

Cons: N/A

Great add-on!

Written By Stavros, Brooklyn, NY on Monday, April 20, 2015

Crutchfield Customer Review (What's this?)

Increases the quality of hands free talking. Users on the other end of my calls have no issues hearing me over my cars loud exhaust.

Pros: Great and cheap addon

Cons: Wasn't included with my Blaupunkt Brisbane 230 originally.

Discreet mic, but not very loud

Written By JasonG, the Washington, DC Area on Friday, April 10, 2015

Crutchfield Customer Review (What's this?)

The microphone is nice and discreet, unlike some of the larger microphones sold with other brands, so it doesn't stick out like a sore thumb. However, with the small size, I think it sacrifices quality. It does not seem to be a noise-cancelling microphone, and listeners on the other end of phone calls say that I sound very far away, and have trouble hearing me, even though I have it mounted high on the A-pillar, fairly close to my face.

Pros: Small, discreet, easy to mount, with plenty of wire length.

Cons: Poor audio quality

Fantastic Microphone!

Written By Kim B., Atlanta, GA on Thursday, September 04, 2014

Crutchfield Customer Review (What's this?)

I have the Blaupunkt 420BT radio, which has a built-in microphone. I drive a Honda Civic, so I was hoping the built-in microphone would be good enough, since my car doesn't have tons of road noise. However, 80% of the time, I had to switch my calls back over to the handset audio, since the people I was talking to couldn't hear me. I also wasn't able to use any kind of voice-recognition functionality before.

So I bought this external microphone, and it's solved all those problems! I'm able to use my phone completely hands-free in the car. Additionally, because the cord on the microphone is so long, I was able to route the cord up through some body trim, so it's pretty much completely hidden. I would highly recommend this microphone to anyone with the Blaupunkt 420BT stereo!

Pros: - Long cord, which is easy to hide - High quality microphone

Cons: - None

Great external mic

Written By carnut, SF Bay Area on Friday, August 29, 2014

Crutchfield Customer Review (What's this?)

A great mic, very small, inconspicuous, easy to locate, at a great low price. Pickup sound quality is great.

Good quality

Written By JamesM, Logan, OH on Tuesday, July 29, 2014

Crutchfield Customer Review (What's this?)

Easy to fit, nice long cable

Pros: nice and discrete. Looks good and works well.

Cons: none

Great Mic!

Written By Adam P, Clayton NC on Tuesday, April 29, 2014

Crutchfield Customer Review (What's this?)

Very happy with the Microphone, easy to install and people can hear me clearly when speaking, I'm very happy with the suggestion from Crutchfield to add it to my stereo when I bought it.

Pros: Great looks, almost looks factory where I have it installed

Cons: NONE

best 10 bucks ever spent!!

Written By Chris L., Orlando, Fl on Friday, March 14, 2014

Crutchfield Customer Review (What's this?)

This the best 10 bucks I have ever spent! My wife has a 50 minute commute and also travels for work. Now that she has this bluetooth she is talking handsfree and so much safer! Thank you. The voice quality is great!

Blaupunkt BPTRN420MIC

Written By Anonymous, Arlington, va on Monday, March 10, 2014

Crutchfield Customer Review (What's this?)

picked up too much road noise, and people on the other end couldn't here a thing I was saying

A must

Written By Jeffrey, MA on Friday, February 28, 2014

Crutchfield Customer Review (What's this?)

Easy to install. The wire was sufficiently long to reach all the way to the a pillar in a relatively large vehicle. Not sensitive enough to pick up every ambient noise which is a good thing.

Pros: Worthy addition to Toronto 420. The built in mic is ineffective.

Cons: None.


Written By Steve W, Maywood, NJ on Tuesday, January 14, 2014

Crutchfield Customer Review (What's this?)

I am pleased with the entire upgrade that I have done with the help of Crutchfield. I have not yet had opportunity to test this product, as the built in microphone in the radio has thus far been adequate. I bought this anticipating that I will remove the radio and attach this in the back of the unit(along with a rear USB based wire to charge the phone). The slots are there, so I decided to try to use them.

Pros: Moves the microphone closer to the driver, makes the voice clearer to the person at the other end.

Cons: None yet, but I expect that it will over-ride the built in microphone. It may turn out to be overkill.

Blaupunkt BPTRN420MIC

Written By Anonymous, Bellflower, CA on Thursday, January 09, 2014

Crutchfield Customer Review (What's this?)

First off, great and fast service. I got the microphone for my head unit and it works like a charm!! Phone calls sound as good as if your holding the phone! Pretty satisfied.

Pros: Easy to install!

Hands-on research

What's in the box?

  • Microphone (w/ attached 9.75' cable terminated by a 2.5mm connector)

Product Research


External Microphone: This external microphone (BPTRN420MIC) is designed to work with compatible Blaupunkt head units or other Bluetooth-enabled head units that feature a 2.5mm mic input. The external microphone enables you to mount the mic closer to the driver and provides improved voice pick up, when compared to the integrated mic on the front-panel of a head unit. The BPTRN420MIC features an attached 9.75' cable that is terminated by a male 2.5mm connector which plugs into the 2.5mm mic input on the back of your compatible head unit.

Note: No mounting bracket or hardware is included with the external mic. Use a small piece of two-sided 3M tape (not included) to secure the mic to the driver pillar or your dash.

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.