BuffaloBill Posted April 22, 2014 Share Posted April 22, 2014 I believe that the speakers on our boat has too much base due them being fitted into the lining panels which are hollow to the hull. This produces a very deep base note which means turning up the volume until it becomes possible to hear anything! I'm sure someone posted on here months ago fitting a backing cone or something to the speakers which improved things. Trouble is, I can't seem to find any available. Anyone know where to get any for 4" speakers? Quote Link to comment Share on other sites More sharing options...
MBA Marine Posted April 22, 2014 Share Posted April 22, 2014 you need some ply, glue, screws and suitable carpet or foam to line them. Quote Link to comment Share on other sites More sharing options...
BuffaloBill Posted April 22, 2014 Author Share Posted April 22, 2014 Not possible Mark without Major surgery as there's no access to the rear of the mounting and the lining panels are screwed and the heads hidden with wooden plugs and all varnished to match That's why I'm looking for backing cones or whatever to concentrate the output forward and not into the cavity behind. Quote Link to comment Share on other sites More sharing options...
Maxwellian Posted April 22, 2014 Share Posted April 22, 2014 Have you tried ceiling speakers? They sometimes have acoustic back boxes. Quote Link to comment Share on other sites More sharing options...
MBA Marine Posted April 22, 2014 Share Posted April 22, 2014 Put Brass or stainless vent covers where the speakers currently are and move the speakers to where you can box around them. Quote Link to comment Share on other sites More sharing options...
diesel falcon Posted April 22, 2014 Share Posted April 22, 2014 hows about this stuff?? http://www.nexxia.co.uk/products.asp?s=Car%20Audio%20Accessories&c=Acoustic%20Material or the cloth? Quote Link to comment Share on other sites More sharing options...
ranworthbreeze Posted April 22, 2014 Share Posted April 22, 2014 Hi Bill, I can't see any speaker backing cones but there must be some to adhere to fire regulations for ceiling voids in buildings. Have a look at these speakers as an alternative they have a built in backing, I used some of these on the boat in February.http://www.force4.co.uk/1957/Force-4-Waterproof-Speakers-4-inch---20W-Marine-Speakers-Pair.htmlRegardsAlan Quote Link to comment Share on other sites More sharing options...
C.Ricko Posted April 22, 2014 Share Posted April 22, 2014 :turn the bass down 2 Quote Link to comment Share on other sites More sharing options...
Mowjo Posted April 23, 2014 Share Posted April 23, 2014 Mr Bill! do you mean Baffles, something like these,,,,http://www.camauto.com/speaker-baffles-4-inch#!prettyPhoto[gallery]/0/ 1 Quote Link to comment Share on other sites More sharing options...
Oddfellow Posted April 24, 2014 Share Posted April 24, 2014 You will probably find that simply stuffing a wadding into the void and then refitting the speaker will have a big effect. Alternatively, swap the Motorhead CD for Enya. 2 Quote Link to comment Share on other sites More sharing options...
BuffaloBill Posted April 24, 2014 Author Share Posted April 24, 2014 Mowjo......your the man That's exactly what I'm looking for! Quote Link to comment Share on other sites More sharing options...
Mowjo Posted April 24, 2014 Share Posted April 24, 2014 Your Welcome Bill! Frank,,,, Quote Link to comment Share on other sites More sharing options...
LondonRascal Posted April 26, 2014 Share Posted April 26, 2014 I'd persomnally keep the speakers as is (rare to find some decent base speakers on a boat) and instead fit some tweeters: http://www.amazon.co.uk/dp/B004BDN8SS Quote Link to comment Share on other sites More sharing options...
BuffaloBill Posted April 26, 2014 Author Share Posted April 26, 2014 Sorry Robin but they have to be modded! They boom out far too loud as the whole hull becomes a 'boombox' I hate loud music of any kind as I feel it drowns out far to many other sounds which I prefer to hear(wildlife for one)and I would not want to upset anyone close to us with such a din. Parts on order now Frank. Andy, Enja I'm all for Now one for the mods. Even though the 'Edit' box opens, it won't allow me to edit my posts. I wanted to add replies to Andy and Clive but couldn't. Any ideas? (Dag nab it! it works now ) Quote Link to comment Share on other sites More sharing options...
MBA Marine Posted April 26, 2014 Share Posted April 26, 2014 If you want to hear wildlife, then turn off your radio! Quote Link to comment Share on other sites More sharing options...
diesel falcon Posted April 26, 2014 Share Posted April 26, 2014 tweeter tweeter!! 1 Quote Link to comment Share on other sites More sharing options...
BuffaloBill Posted April 27, 2014 Author Share Posted April 27, 2014 Mark....we only put the radio on to get the news or some other information but I wouldn't want to annoy anyone else whilst I'm doing it. Nice one DF Quote Link to comment Share on other sites More sharing options...
andyandsallyb Posted May 2, 2014 Share Posted May 2, 2014 Hi Bill, If as you say, you feel you are getting too much bass, the best solution would be to reduce the bass level on your on your radio. If the speakers you have are only 4" units then they are going to be designed to work in what is known as a free air installation which is what you have. The lining panel that the speaker is mounted in is acting as an acoustic baffle and basically it masks the rear firing wave from the back of the speaker reaching your eardrum hence you only hear the forward firing waveform. If you have ever held a speaker in your hand while it is running you would notice that the low frequency response (bass) is very poor, this is because the front firing wave and rear firing wave are both audible (absence of a baffle) and because they are out of phase with each other, they effectively cancel each other out (no bass). What you are attempting to do by covering the rear of the speaker will have the effect of reducing the movement of the speaker cone by using an acoustic suspension (a small volume of air trapped behind the cone) a free air speaker is not designed to work is this way. Bass notes take a great deal more electrical energy to reproduce over mid range or higher frequencies. By physically restraining the movement of the cone in this way to reduce the low frequency output, in the long term will undoubtedly shorten the life of the speaker and in the short term may cause an overload condition within your radio units amplifier, leading to excessive heat and possibly increased distortion. Andy. 1 Quote Link to comment Share on other sites More sharing options...
BuffaloBill Posted May 3, 2014 Author Share Posted May 3, 2014 Parts now fitted and work really well I think I know what you are trying to tell me Andy..... but as the radio is on for just a few minutes at a time, I don't think there will be any serious effects to the radio. Quote Link to comment Share on other sites More sharing options...
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