Yes they do. http://www.cardowireless.com/scala_rider_teamset/
I got mine off ebay. They do an ok job. Wife and I use them with our modular helmets. Its not perfect in my book but works.

 

Do these affect your hearing of the stock radio?

 

No, the speakers are imbedded into the helmet, its not like wearing muff or anything like that.

 

This thread is a little old but I wondered if you tried the Scala Q2s with an mp3 player and what the sound quality was like? My main purpose would be to use them to listen to music with the occasional chat with the wife.

 

I like the way you mounted it to the half helmet. I also have the HD helmet but am not certain how you attached the mounting bracket to the ear flap.

 

I just received my Q2's today. Tried out all the functions. I'll tell you, the system works a s advertised. Nice clear communications intercomm to intercomm, cell phone, tying a Garmin Nuvi 750 in through the FM reciever, and the MP3 player is stereo, but the speakers are a little tinny. I think the MP3is a straight pass through from MP3 out to in helmet speakers. I think the system is built more for comm than for music.

 

The Scala does not support AD2P BT stereo.

 

I just bought the Q2 multi set from a site sponser here on HDForums,TechnCycle Gear LLC
I did alot of research and found that other had reviewed the Q2's just as advertised.Fast replies to my questions,fast shipping and a price I couldnt find anyone willing to match or beat,on top of what i would say was a great shopping experience,he also offers free shipping over $100.00 order,and a discount for HDForums members. $247.49 shipped to me door which is great price on the Q2 multi set. I'm waiting on my new helmet to come in,so i can mount this set up to my helmet,I have been screwing around with it,i have it paired with my zumo 550,and my phone is paired with the zumo,when i have incoming call i just press the screen of the zumo and instantly im answering the call,nice and clear throught the speakers, and the wife said it sounded like i was talking on my cell phone. i did try listening to my mp3's from the zumo to the q2 ,was tinney sounding,then i read on to see the speakers are in momo,thus explaining why it sounded tinney through the headset,I also read if you use the provided patch cord with the unit to a ipod or such to play mp3's in will play stereo through the headset speaker when plugged directly to the q2 headset base,I've yet to try it,but will once the helmet comes in and i can mount the whole thing to the helmet.

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just my 2 coppers on the subject of the Q2's

 

I bought the Q2 MultiSet a few months ago and we love them. Makes communicating so much easier. I had them mounted to 1/2 helmets with ear flap pouches originally and then moved them to some new open faced helments. I bought some extra mounts to put back on the 1/2 helmets but haven't put them on yet. I was talking on the phone last night at about 65mph and the gf said she thought I was sitting at home. Great product.

 

I have a question, are these stand alone or do they have to be plugged into the radio on the bike?