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The one thing that I do not like about my Neotec 2 helmet with Sena bluetooth is the sound quality coming out of the speakers. There is practically no bass. I gave up on speakers in helmets years ago and went to earbuds because of the difficulty of getting a precise installation. Cheap earbuds sounded better than the best speakers. Most helmets had/have a very limited space to place speakers. To get good sound quality, speakers need to be precisely covering the ears. It is not easy to achieve. The drop off in sound quality is dramatic with even a small misalignment or distance from the ear.
I was disappointed with the small speaker size of the Senas, because I knew that they would not do good bass just by looking at them. The customized location in the helmet also restricts moving them around. Realizing that there was an unnecessarily large space between the speakers and my ear, I decided to try to get the speakers as close to my ears as comfort would allow. I removed the speakers from their snap in spot and applied velcro to the speaker and the receptacle. The velcro moved the speaker closer to my ear by the thickness of the hook and loop combo. This made a very noticeable improvement in sound quality and volume. There was room to get the speakers even closer, so I removed the Velcro on the helmet side and used some of the thin double sticky sided foam pads used to hang stuff on a wall to the cavity that the speaker sits in. Then I attached the Velcro to that. The extra thickness moved the speakers closer still to my ear.
Ideally, you want the speakers to completely cover the ears with the foam BARELY touching the ear. There should be no pressure on the ear by the speaker. Another dramatic improvement. I could probably stand them to be a tiny bit closer, but I think that I am close enough. The improvement in bass response is 2X. This is not the most elegant of solutions, but it only took 5 minutes per ear. I can always refine my method of mounting if need be. As it is none of the things that I did is noticeable visually.
I was disappointed with the small speaker size of the Senas, because I knew that they would not do good bass just by looking at them. The customized location in the helmet also restricts moving them around. Realizing that there was an unnecessarily large space between the speakers and my ear, I decided to try to get the speakers as close to my ears as comfort would allow. I removed the speakers from their snap in spot and applied velcro to the speaker and the receptacle. The velcro moved the speaker closer to my ear by the thickness of the hook and loop combo. This made a very noticeable improvement in sound quality and volume. There was room to get the speakers even closer, so I removed the Velcro on the helmet side and used some of the thin double sticky sided foam pads used to hang stuff on a wall to the cavity that the speaker sits in. Then I attached the Velcro to that. The extra thickness moved the speakers closer still to my ear.
Ideally, you want the speakers to completely cover the ears with the foam BARELY touching the ear. There should be no pressure on the ear by the speaker. Another dramatic improvement. I could probably stand them to be a tiny bit closer, but I think that I am close enough. The improvement in bass response is 2X. This is not the most elegant of solutions, but it only took 5 minutes per ear. I can always refine my method of mounting if need be. As it is none of the things that I did is noticeable visually.