Discuss Playing with the Fisher St-828's in the DIY Speakers | DIY Subwoofers forum.
Silicon can, as it offgasses while curing from what I have heard, but if you put it on and give ...

**evilskillit** · **10-16-09, 08:28 AM**

Silicon can, as it offgasses while curing from what I have heard, but if you put it on and give it a few days to cure I believe it becomes completely inert. I could be wrong tho, if so someone please correct me. Tho if that is the case I'm sure you could do the same thing with latex based caulk.

I like the idea of the closed cell foam but sometimes getting it to conform around the edge of a circular hole, especially a very small one can be a bit tricky. Also when you are trying to get speakers flush mounted and are trying to be very exact how does one take into account the extra thickness added by the closed cell foam making the speaker stick out of the hole just a hair more?

**the_diyr** · **10-16-09, 07:28 PM**

Well the UPS guy just showed up a few minutes ago with my new Cerwin Vega Tweeters .. So now the ST828 build is going to happen ... Now after a ton of measuring and figuring the old ST828 enclosures I am pretty sure I can make the tweets mids and 15 in woofers work just fine.. Basics are 15 inch CV woofers ( 5 inch CV mids ) and 3 inch CV tweets.. The tweets and the mids are closed back .. Leaving me a cabinet 27 inches tall by 12 inches deep by 17 inches wide.. Port is 2inches dia. by 4 inches long. Box volume is 3.18 .. tuned at about 45hz or close.. May play with the port a little ?? the drivers are the same size as the old fisher drivers .. I am using the CV crossovers as well.. they are 3 way.. I think it will work .. I have played with box and port calcs. before when I designed my 10inch pioneer ported under the seat box for my Ford Crewcab FX4.. Will see tommorrow , If my wife will allow me to work on them tommorrow I meant..

**the_diyr** · **10-16-09, 08:01 PM**

Here are the tweeters and the mids that are going in the fisher cabinets. along with the crossovers.. Just trying to decide about the fisher 15's still in the cabinets , they seem to be in better shape than the 15 inch CV's that I have.. The CV's nead refoaming .. but the fishers do not..

**the_diyr** · **10-17-09, 07:08 PM**

They are built // The crossovers were mounted as were the tweeters and mids .. My old fishers sound great.. The cut off points are very smooth.. The tweeters are not the dome type that I wanted but money is a little tight The crossovers that we feared would sound bad actually sound really good .. Now I really want to build some speakers so I am thinking start with something simple like the rear surrounds... Also I still have to build my equipment rack..

**the_diyr** · **10-18-09, 11:29 AM**

Ok they are ugly bu they sound great

**the_diyr** · **10-18-09, 11:38 AM**

I know the woofer looks like cr** but it sounds good.. Actually I have never be able to make those 15 inch woofers even begin to move .. I tried one time and got my Pioneer A/V reciever pretty loud and still nothing , they do vibrate a little bit ... Maybe one day I will build some better fronts but for now they sound great .. The RSVIDEO infinity that i rebuilt the surrounds is set to small on the A/V reciever and it works great since it is set to small it has no bass at all so it sounds good.. I did have to set the fishers to large and then this made the sub go to plus .. Which all sounds good ... the only thing i would change if I could afford them is maybe replacing the cv tweets that i bought with some ribbon tweets , the only problem with ribbon tweets is they are overpriced for what they are and the power handleing isn't very good