MSP sub replacement questions

[jaymode]

I am so close to going to BB just becuase I could demand alot per hour and probably get it for just the reason you have described. The problem is I refuse to push the service plans agressively.

I am gonna jack my own thread. At my best buy they actually do not make us push the service plan that agressively, they actually discourage against it, all they want us to do is offer for the products we sell that it is available for and explain the benefits. But they do want us to get people to subscribe to netflix, rhapsody, sports illustrated, etc. Also, if you just tell the GM that you are comfortable offering the complete solution as they call it, then you are ok. Most supervisors dont give a s***.

Despite the incompetence of the car audio guys, BB is actually one of the better ones in my town. We have a crutchfield store, who are supposed to be the leader in audio, which is such bulls***. My friend had them install his headunit and speakers. His car originally had 6x9's in the rear and the salesman and installer at that time convinced him that 6.5's would be better in the rear. So he got them. I heard his system one day and was like something sounds ****** up back there, it sounded like a tin can. I took off the covers and saw what a horrible job was done. The speakers were not aligned and hitting the rear deck, one of them was crushed due to this. The next problem was the way they installed the plate, they did not put the screws in the holes. It was horrible, so we got his mom, a lawyer to call and she got him better 6x9's and proper installation for free.

 

[Poseur]

Hey, I thought I should clear things up here, not sure if anyone's exlpained it. The re-wring that everyone speaks of isn't really a re-wiring it's a configuration of the voice coil. The stock MSP sub has a 8ohm voice coil meaning it draws a VERY low load from the amp. The get the most from the stock amp, you want either a single 4ohm voice coil, or dual2's so you can wire in series and get 4ohms. It has nothing to do with the actual size of the wire used.

 

[jaymode]

Hey, I thought I should clear things up here, not sure if anyone's exlpained it. The re-wring that everyone speaks of isn't really a re-wiring it's a configuration of the voice coil. The stock MSP sub has a 8ohm voice coil meaning it draws a VERY low load from the amp. The get the most from the stock amp, you want either a single 4ohm voice coil, or dual2's so you can wire in series and get 4ohms. It has nothing to do with the actual size of the wire used.

whoa, now I am confused. Could you explain that to me again? I do not know much about this stuff, but I think you are trying to tell me that going from 8 ohm to 4 ohm wire is not going to help me at all?

 

[Poseur]

Wire is measured in gague, not ohm. ohms are a measure of resistance. more ohms means more free-flowing which in the case of amps means less power in general. However most amps will have a minimum rating, so if an amp claims to be 1ohm stable that means you can load it down to 1 ohms. Mathemetically it's fairly simple. This means you could run 4 4ohm loads to it in paralell. each would indivivually reduce it. 2 4ohm loads in paralell=2ohms. 2 2ohm loads in paralell=1ohm. THis is how dual voice coil subs work as well. My dual 2ohm voice ciol can be run in paralell (same connections to both + and - terminals) and it will produce a 1ohm load. Now where it gets tricky is that you can also wire it in series, this gives you a 4ohm load.

Think of it like a pair of aa batteries powering a light bulb. You can run them next to eachotherand connect the + and - of both of them to the + and - terminals on the bulb and it will put out light. This is paralell wiring. Now you can also do like many flashlights do. "stack" them which puts the positive of one battery on the negative of the other, then the outsides are run to the bulb. This is series wiring. Both have different end-results. one lasts longer at a lower output, the other burns brighter. but both work.

 

[Poseur]

Basically wire doesn't make any difference. it's the speaker itself. the stock one you have is a single 8ohm voice coil. So there's no way to switch wires and magically get more sound. Fortunately the majority of speakers are based around a 4ohm load, so be it a single 4ohm, or dual2ohm voice coils, either of these configurations would give you 4ohms. and 4ohms is what you're shooting for to get the most out of that amp.

 

[cthomp21]

Just wanted to note that the TB sub (Tang Band W8-740C) does not fit in the stock MSP box. Its magnet is too large in diamater.

For the heck of it I tried swapping out the Kenwood sub with one of these TB subs (have a couple sitting in the closet). No fit.

 

[got wake?]

Just wanted to note that the TB sub (Tang Band W8-740C) does not fit in the stock MSP box. Its magnet is too large in diamater.

For the heck of it I tried swapping out the Kenwood sub with one of these TB subs (have a couple sitting in the closet). No fit.

well that sucks(scratch) would using an MDF ring to rais it out of the box a little work? i knew the magnet was big for an 8, but i've never seen the msp enclosure to see if it would fit. aw well, i've still got 10 of the TB subs laying around(evil)

 

[cthomp21]

well that sucks(scratch) would using an MDF ring to rais it out of the box a little work? i knew the magnet was big for an 8, but i've never seen the msp enclosure to see if it would fit. aw well, i've still got 10 of the TB subs laying around(evil)

It would probably work. The MSP enclosure has a cone-shaped basket which can't be removed without really messing up the enclosure. You'd probably need a 1/2" spacer at minimum. Maybe I'll mess around with it next weekend and come up with some specifics.

10 TB subs? How about a pair of the PE 1000w plate amps for a HT sub that'll melt your brain!

 

[got wake?]

It would probably work. The MSP enclosure has a cone-shaped basket which can't be removed without really messing up the enclosure. You'd probably need a 1/2" spacer at minimum. Maybe I'll mess around with it next weekend and come up with some specifics.

10 TB subs? How about a pair of the PE 1000w plate amps for a HT sub that'll melt your brain!

you might as well just start with 3/4" MDF or for something like this, a different wood that is better for screwing into would work for a mounting ring.

bah, HT? who needs a HT when you've got that much power in a car(nana)

 

[jaymode]

well never mind then I guess, I mis read something where it stated that you could flip over the amp and redo the wiring to make it sound better/louder but guess that was wrong? Am I correct?

 

[1sty]

well never mind then I guess, I mis read something where it stated that you could flip over the amp and redo the wiring to make it sound better/louder but guess that was wrong? Am I correct?

You need a different sub aswell.

 

[cthomp21]

you might as well just start with 3/4" MDF or for something like this, a different wood that is better for screwing into would work for a mounting ring.

bah, HT? who needs a HT when you've got that much power in a car(nana)

I might have my father-in-law make me a spacer ring out of aluminum at his machine shop. I'll just need to figure out the minimum thickness.

 

[1sty]

Why aluminum?

 

[cthomp21]

Why aluminum?

They've got a lot of different thicknesses available. I think it's about the easiest for them to machine something up for me too.

 

[1sty]

Why not wood?

 

[cthomp21]

Because then I would be making it.

I don't have a router with a circle jig either, or I'd probably do it. I might freehand one with the jigsaw if I get some time this weekend.

 

[1sty]

Select products might have the exact one you need premade.
We might be able to find some one here to fab it for you to if the aluminum doesn't work.

 

[got wake?]

Select products might have the exact one you need premade.
We might be able to find some one here to fab it for you to if the aluminum doesn't work.

get me a thickness and i can make some(rockon) i got the jasper circle jigs(evil)

 

[cthomp21]

Maybe this will be my excuse to finally get a router and circle jigs. I'll let you all know on Sunday the thickness and results.

 

[got wake?]

Maybe this will be my excuse to finally get a router and circle jigs. I'll let you all know on Sunday the thickness and results.

parts express had the combo of the large jig and small jig for $50 when i got mine