Music

Status
Not open for further replies.

Ted

.
Jan 26, 2005
1,265
C&C 110 Bay Shore, Long Island, NY
A while back Philwsailz contributed some information to a topic on the SBO forum regarding music on a boat. Specifically, he wrote about using sound exciters instead of speakers. Sound exciters are small devices less than 2 inches in diameter that make the surface they are attached to vibrate and act as a speaker. I recently installed a few on my boat (cockpit) and couldn't be more pleased with the results. No large holes were cut, no chance of anybody damaging speakers or grills, they are totally out of sight and are completely protected from the elements. But the biggest surprise was that they actually sound terrific. I really didn't expect that. I just want to thank Philwsailz for his wonderful advice. If it weren't for him I never would have known about these amazing little devices. I have to admit that these sound exciters are one of my favorite upgrades. I am now looking for places to install them inside the cabin. Thank you for sharing this information, it's sincerely appreciated.

Here is some specific information about my installation if anyone is interested in adding music to their cockpit without cutting big holes in the fiberglass. My boat is a 1983 C&C 29-2. The sound exciters that I used are made by HiWave model HIAX32C20-8 which are specifically designed to drive dense rigid surfaces like glass. The cost was about $20 each. I mounted a total of four sound exciters on the interior surfaces of the cockpit seat backs which is also the inboard surface of the cockpit combing. (2 per channel) I actually purchased six but may not install the other two even though my stereo can handle 2ohms. Four of them really fill the cockpit with plenty of sound. What makes the sound so unique is that you can't pin point exactly where the music is coming from because a large surface area is acting as a speaker. The sound exciters that I used are rated at 8 ohms and I wired two of them in parallel to achieve 4 ohms. The location seems ideal because the seat backs are angled and help direct the sound more directly to the listeners ears. The fiberglass at this location is thinner than some of the other areas of the cockpit which helps acoustically. I tried many other locations and this one seemed to sound the best plus there is no chance that they will ever get wet or damaged. Experiment with different locations of the exciters on your own boat because location may significantly change the tone of the sounds produced. My stereo system is a Fusion MS-IP600 controlled by a remote mounted in an existing screw out inspection port mounted in the cockpit. Have fun with these things, they really are amazing.
 
Jun 25, 2012
942
hunter 356 Kemah,the Republic of Texas
A while back Philwsailz contributed some information to a topic on the SBO forum regarding music on a boat..
Ted...... Thanks for the information very interesting. In fact I was planning on going down to the boat tomorrow and redoing my stereo speaker wiring and and some other related items.
 

hewebb

.
Oct 8, 2011
329
Catalina Catalina 25 Joe Pool Lake
Do I understand that the sound is produced from vibration in the fiberglass? I sure like the concept but wonder what the long term effect will be on the fiberglass & gel coat.
 
Jan 13, 2009
393
J Boat 92 78 Sandusky
Thanks for info Ted. Pics or it didn't happen! I'd like to do the same thing on my 29-2.
 
Dec 11, 2008
1,338
catalina C27 stillwater
Do I understand that the sound is produced from vibration in the fiberglass? I sure like the concept but wonder what the long term effect will be on the fiberglass & gel coat.
The force applied is miniscule. You apply more force sitting down and leaning against the cockpit coamings than these things produce. I would be totally unconcerned about a tactile transducer causing any structural damage.


While I am at it, a benefit not readily apparent comes from the fact that most of these devices employ neodymium motors. In a neo-motor design, the magnetic slug is mounted inside of the motor. In a traditional loudspeaker motor, the magnet is a ceramic donut that is sandwiched between the back plate and the front plate.

A traditional loudspeaker motor will have plenty of stray flux to mess with your compass, unless it employs shielding to try to contain the stray flux. A neodymium magnet, being inside of the motor, is inherently self-shielding. The stray magnetic flux is for all practical purposes non-existent.

The benefit is that these can be mounted closer to your compass than a traditional loudspeaker with minimal compass deviation, or they can be placed at an appropriate safe distance, (assumed to be greater than two feet) with the assurance that they are influencing your compass' reading much less than if you were using a non-shielded loudspeaer of traditional design.
 

Attachments

Ted

.
Jan 26, 2005
1,265
C&C 110 Bay Shore, Long Island, NY
Here are some photos of the sound exciters and a link to a YouTube video. Installation hint: make sure the mounting surface is smooth because the exciters are installed using two adhesive backed foam rings. I sanded the fiberglass mounting surface smooth with a final grit of 800. May have been overkill but I know they'll be there forever. Wipe fiberglass with acetone and remove all traces of sanding dust before installing the exciters.


http://www.youtube.com/watch?v=MtyRW3KCbxQ
 

Attachments

Last edited:
Apr 8, 2010
2,065
Ericson Yachts Olson 34 28400 Portland OR
Is this technology related to the "sonic anti fouling" concept I read about in some trade magazines? That involves transducers on various areas of the hull underwater.

Power up some rock n roll and keep mold and mildew from growing in your non skid!!
;)
 
Dec 11, 2008
1,338
catalina C27 stillwater
Is this technology related to the "sonic anti fouling" concept I read about in some trade magazines? That involves transducers on various areas of the hull underwater.

Power up some rock n roll and keep mold and mildew from growing in your non skid!!
;)
Not really, in is very simplest, this is just taking a loudspeaker motor and removing the cone while glueing it to a substrate to act as the cone....
 

Ted

.
Jan 26, 2005
1,265
C&C 110 Bay Shore, Long Island, NY
I forgot to include a photo of an installed sound exciter.
 

Attachments

Mar 20, 2012
3,983
Cal 34-III, MacGregor 25 Salem, Oregon
Not really, in is very simplest, this is just taking a loudspeaker motor and removing the cone while glueing it to a substrate to act as the cone....
Im wondering how this would work on a surface such as a fiberglass liner that is covered with sound dampening material... the material is in place to soften the sound that is produced inside the cabin of the boat, but with the exciters, the music sound would be produced from the liner itself, so would it be muted, or would it produce a full sound?...
 
Dec 11, 2008
1,338
catalina C27 stillwater
Im wondering how this would work on a surface such as a fiberglass liner that is covered with sound dampening material... the material is in place to soften the sound that is produced inside the cabin of the boat, but with the exciters, the music sound would be produced from the liner itself, so would it be muted, or would it produce a full sound?...

It would be muted.

Most damping materials use mass to damp resonance or lower resonance. IF you were putting an exciter on a damped surface, you would want to remove the damping for a reasonable radius around the proposed location prior to mounting the exciter.
 
Oct 26, 2005
2,057
- - Satellite Beach, FL.
Here are some photos of the sound exciters and a link to a YouTube video. Installation hint: make sure the mounting surface is smooth because the exciters are installed using two adhesive backed foam rings. I sanded the fiberglass mounting surface smooth with a final grit of 800. May have been overkill but I know they'll be there forever. Wipe fiberglass with acetone and remove all traces of sanding dust before installing the exciters.

http://m.youtube.com/#/watch?featur...ch?v=MtyRW3KCbxQ&feature=youtube_gdata_player
Very cool! I'd love to see the looks on guest's faces when they're trying to find the speakers:confused:!
 
Apr 8, 2010
1,606
Frers 33 41426 Westport, CT
Phil - I'm planning on installing some of these for the cockpit also this year. I have a pair of 4 ohm 6.5" speakers in the cabin, and this head unit http://www.westmarine.com/webapp/wc...ber=12246021&langId=-1&searchKeyword=wm3000rf which is rated for 4-8ohm speakers.

do I need to install 2 of these per channel in parallel to match the impendence of the cabin speakers, or can I just install 1 per channel? I know exactly where I would put one, have to figure out a location for a 2nd if I need to go that route.
 
Dec 11, 2008
1,338
catalina C27 stillwater
Phil - I'm planning on installing some of these for the cockpit also this year. I have a pair of 4 ohm 6.5" speakers in the cabin, and this head unit http://www.westmarine.com/webapp/wc...ber=12246021&langId=-1&searchKeyword=wm3000rf which is rated for 4-8ohm speakers.

do I need to install 2 of these per channel in parallel to match the impendence of the cabin speakers, or can I just install 1 per channel? I know exactly where I would put one, have to figure out a location for a 2nd if I need to go that route.
Either will work. You do not need to match the cabin speakers in terms of impedance.

Know too that there are 4-ohm versions available. Just go to the link above that CB32863 posted and check out the availability of the 4-ohm versions.
 
Oct 24, 2010
2,405
Hunter 30 Everett, WA
My concern with this type of equipment is rattles. I always assumed I'd find unwanted rattles like debris in a speaker it would drive you nuts. Have you had to worry about that?

Ken
 

Ted

.
Jan 26, 2005
1,265
C&C 110 Bay Shore, Long Island, NY
So far I haven't had any issues with rattles. I would think that if something is going to rattle, it will do so whether the sound is produced by a speaker or a sound exciter. They are both basically producing sound waves and at some frequency you may have something on the boat that wants to vibrate too. So I would have to say that it really doesn't make a difference what you use to produce sound and the possibility of having something rattle will always be present. Unlike a speaker, the sound exciter that I used is almost totally sealed. It would be nearly impossible for debris to get between the exciter and the fiberglass unless you intentionally placed it there.
 
Oct 10, 2010
269
Hunter H260 Gull Lake
When you sit in the cockpit, and the exciters are on, do you feel a vibration in your butt? Or if you put your hand on the cockpit surface, can you feel a vibration? One last question, I have cockpit cushions, would that significantly muffle/dampen the sound? Do you get installation instructions as far as placement for best results or can you move them around to test without having to permanently stick 'em on?

I've never seen these and I have 4 in my shopping cart ready to buy. Very cool!
 
Status
Not open for further replies.