1. If you have a 2/1 channel amp with 2 subs svc,or dvc, is it best to bridge the amp or put 1 sub on 1 channel?
I think it's best to bridge a 2 channel amp if it's used for mono sub output. That way, you can be sure that all subwoofers are receiving exactly the same signal. If instead they were connected to L and R, and inputs to the amp were normal L and R, there is some possibility of cancellation. But generally speaking, both methods are frequently used.
2. does it matter if the box is dual chamber or if the box is 1 chamber?
Not really. The importance is airspace dedicated to each woofer. Often a dual chamber box offers better rigidity because of the separating baffle. It also has to do with overall design: e.g. a vented box that is designed with each chamber having its own port. You'll also see custom boxes that have the baffle separating the drivers but with a large hole cut out, giving the box rigidity but keeping the airspace as one.
3. And if it is sealed or ported ?
Box type is dependant primarily on the specifications of the woofer, but also the musical tastes of the user. You can find out more info about best box for a particular sub elsewhere in the forum.
4. The reason I ask is all of the diagrams that at least I have seen show a diagram as if it a mono amp
Not necessarily. They show one pos and one neg, which could go to either a mono amp or a bridged stereo amp.
5. They all seem to ask how many subs, svc or dvc and ohms of the subs
That's a bonus. It will help you select the best configuration for the amp you have chosen to use. The application on this site provides info on the best amp to use according to your configuration of subs. Some configurations MUST use a mono amp while others can use either type.
6. Does the same wiring apply if the box is sealed, or ported, or 1 & 2 chamber?
Yes. Wiring from sub to sub can be routed through the MDF baffle and sealed if a multi-chamber box is used.
7. ex If I have a 2/1 channel amp
You have a two channel amp that can be bridged. It's either two channels or one channel; it can't be both.
8. ex If I have a 2/1 channel amp and 2 svc subs in a sealed dual chamber box should I put 1 sub to 1 channel, or mono the amp and run the wires from 1 sub to the other outside the box and act as if there is no wall between them.
Most people don't install a terminal cup for each sub on the box, but that is a way you can wire each sub to its respective terminal cup and then combine the subs with wiring on the outside of the box. Another method is to use a dual terminal cup and wire each sub to a set. Then the sets of terminals are wired together and sent on to the amp output. The red and black terminals on the terminal cup tell you what the polarity is at the sub coil and helps avoid mistakes in wiring.
Instead of that, wiring is often done inside the box and sealed up. One set of wires exits the box through a drilled hole and that, too, is sealed. The alternative is to run each sub's wires directly out the back of the box and so changes in wiring to an amplifier is easier. The wiring can be either combined directly behind the box or stacked onto the bridged output terminals on the amp.
9. Same question if it 2 dvc
DVC subs are first wired before installation into the box. You figure out all this stuff on paper and make a diagram before you actually start connecting wires.
10. And would the answer changed if the box was ported?
No. Wiring has to do with impedance, and that has to do with amplifier performance.
11. And I also read somewhere (I forget thou) that if you have 2 dvc subs and a 4 channel amp you can put 1 channel to each voice coil is there truth to this?
Yes, there is truth to that. But that is not my preferred method as I mentioned in point #1,
12. and it seams like everybody is helpful on this site.
This is a good site and a fun place to spend some time. Welcome to the forum.
Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
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