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Basic speaker building...

post #1 of 14
6/2/09 at 7:58pm
Thread Starter 
Building my 1st set of speakers and just had a few question, prolly dumb but here goes......

In a sealed 2-way box, I don't need to box in the tweeter do I? Or do I have to seal it off from the inside in a little box? I was just wondering about that.

Also the wattage? Say the rms is 40 for the woofer, and the tweeter is 60. What would the total wattage of the speaker be? Just common sense tells me 80 rms total, because it wouldn't be higher than the smallest speakers rms. Or is that something that can be adjusted in the crossover network, which I am still learning about. I planned on using a premade crossover on this 2-way, because there is alot more to building one than I can learn real quick. Gonna learn how, I just want to get me a set of speakers right away because I got notta right now.
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post #2 of 14
6/3/09 at 4:16am

Re: Basic speaker building...

You only need to enclose the tweeter if it has an open back or a vent hole. Very, very rare but there are a few.

The only accurate way to determine the rating of your DIY speaker is to send it pink noise across its entire operating range. Keep increasing the voltage until it fails. Determine the wattage. Your other option is to do like other DIY guys and ignore RMS ratings most of the time.

-Robert
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post #3 of 14
6/4/09 at 7:21pm
Thread Starter 

Re: Basic speaker building...

Here are the speakers I have finally decided on.....

Parts-Express.comeerless P830941 SDS 5-1/4" Shielded Woofer | Peerless P830941 SDS woofer 5-1/4" woofer Shielded Woofer bass mid midbass mtm coated cone 2-way tymphany peerlessBuy050109

Parts-Express.comayton DC28FT-8 1-1/8" Truncated Silk Dome Tweeter | tweeter dc28f-8 silk dome tweeter dome tweeter soft dome dayton audio dayton loudspeaker dayton dayton silky daytweet-41108 DT010109 DayAudiTweetWoofMid050109

Now I have to find the crossover, which I had but they sold out. lol
Anyway nothing fancy, but I think they will be good.
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post #4 of 14
6/5/09 at 4:13am

Re: Basic speaker building...

Both have a truncated design so that you can mount them touching each other. That keeps the center to center spacing at a minimum. Don't forget to flush mount the tweeter. And I have used that tweeter in both the DII and DIII speakers I have built. It is a great tweeter.

See if someone in the PE forum with experience with both drivers will design a custom crossover for you. Sometimes it only takes a few minutes with the right software. The crossover will cost about twice what a pre-made one will but the benefits will be enormous. I'd do it but I don't have the software nor have I worked with the Peerless mid.

-Robert
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post #5 of 14
6/5/09 at 6:58am
Thread Starter 

Re: Basic speaker building...

Thanks for the response....

I liked the way that mid woofer looked and it matches the tweeter in shape too. I have changed my mind so many times..........but now I am finally happy with both the tweeter and woofer.

What software do I need, cause I am will to get it. It looks like I am changing my obsessive complusion to home audio from car audio.......so much better not being limited to the space of my truck. And nice to be able to build the correct size boxes.
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post #6 of 14
6/5/09 at 9:15am

Re: Basic speaker building...

LSP CAD and CAL SOD. Along with a calibrated mic, you are looking at $500 to $1,000. Find someone that has experience with these drivers or someone with this software that is willing to test them for you and design a crossover. Unless you are going hard-core with this hobby, it is a waste of money.

-Robert
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post #7 of 14
6/5/09 at 1:05pm
Thread Starter 

Re: Basic speaker building...

Went pawn shop surfin and found these.....

http://216.77.188.54/coDataImages/p/...speaker001.JPG

http://216.77.188.54/coDataImages/p/...speaker002.JPG

Any opinions on them? Let me know what ya think they are worth and I will tell ya later what I paid.

I am glad I got these because it reveled that this old equipment I had needs updating. The only thing that is useable is the EQ....if that is worth using. It's a Technics SH-8058.

I guess now I have to start reading up on where to start with a reciever. Getting fun now.
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post #8 of 14
6/5/09 at 7:21pm

Re: Basic speaker building...

Quote:
It looks like I am changing my obsessive complusion to home audio from car audio
Many of us have followed the same path.
Quote:
And nice to be able to build the correct size boxes.
This is not as easy as it seems. The correct size box has an enormous impact on how the speaker will eventually sound. I can build some pretty good cabinets for a amateur woodworker but haven't yet mastered proper cabinet size.

For those wanting to get into speaker building, PE speaker projects are an excellent way to get started.

These Infinity Crescendo CS3008's are the best deal on the net right now. I might go get them just for the hell of it.
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post #9 of 14
6/5/09 at 8:02pm
Thread Starter 

Re: Basic speaker building...

Quote:
Originally Posted by gene c
Many of us have followed the same path.This is not as easy as it seems. The correct size box has an enormous impact on how the speaker will eventually sound. I can build some pretty good cabinets for a amateur woodworker but haven't yet mastered proper cabinet size.

For those wanting to get into speaker building, PE speaker projects are an excellent way to get started.

These Infinity Crescendo CS3008's are the best deal on the net right now. I might go get them just for the hell of it.

I have gotten tons of info from PE's projects. Got a few ideas to go with now.

As for those speakers I just bought, I only paid 39.99 for them. I figured hell the boxes were worth that. They are ported in the back with a tapered tube, and sound pretty sweet. And at 40 bucks I didn't figure I could go wrong.
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post #10 of 14
6/5/09 at 8:08pm
Thread Starter 

Re: Basic speaker building...

Quote:
Originally Posted by MarvinJr
I have gotten tons of info from PE's projects. Got a few ideas to go with now.

As for those speakers I just bought, I only paid 39.99 for them. I figured hell the boxes were worth that. They are ported in the back with a tapered tube, and sound pretty sweet. And at 40 bucks I didn't figure I could go wrong.
The same shop had a nice Cerwin Vega sub box with dual 10's, they wanted 199.00 for it which didn't seem like much of a deal.....plus I already have a nice 10 for my sub, but dam I love the cerwin vegas.
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post #11 of 14
6/6/09 at 3:59am

Re: Basic speaker building...

Quote:
Originally Posted by MarvinJr
dam I love the cerwin vegas.
The older V-Max series with the red surround were great. I had a chance to pick up a dozen or so 15's for $80 each but only got two. Eight would have been perfect for my home theater IB sub.

-Robert
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post #12 of 14
6/6/09 at 6:44am
Thread Starter 

Re: Basic speaker building...

Quote:
Originally Posted by Robert_J
The older V-Max series with the red surround were great. I had a chance to pick up a dozen or so 15's for $80 each but only got two. Eight would have been perfect for my home theater IB sub.

-Robert
That's what these were....not sure what they sold for new, or how hard they were used. Looked sweet though with the dual 10 box, I bet it sounded good too.
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post #13 of 14
6/6/09 at 9:56pm
Thread Starter 

Re: Basic speaker building...

Ok I have decide on what to make. Seeing as for now I have the 2 ways, so I don't need the boxes I have started....but what I can do with them is flip them on their sides and end to end the make a perfect base for my TV. Thus giving me the perfect space for the center channel. I am thinking the same 5.25 peerless woofers (2) on each end getting .4 cf each sealed. Then in the middle between them I found a full range 2" peerless. Haven't decided on 2 or 4 of them....any opinions on that? I can get .2 cf per for them.

Also you said someone might could help with the crossover layout? That would be greatly appreciated. If so I can give exact numbers and speakers I want. Let me know.

Gonna get a 5.1 reciever @ 100 per, I can just run the 2 ways, and the center channel without the other leads hooked up without any problems for now right? Once I get that going I can make a decision on some floor standing front speakers with some kick to them, got some good ideas from the projects on PE. Might even start on my all Vega system with a set of them with the 8's in them.

Anyway I just wanna get the center channel before I get the reciever so I can atleast enjoy some surround with the 2 ways in the back corners and the center channel box under the TV. I feel like that's a good start then I can fill in the empty spaces that I hear, and finish my sub box.
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post #14 of 14
6/7/09 at 12:54am
Thread Starter 

Re: Basic speaker building...

Quote:
Originally Posted by MarvinJr
Ok I have decide on what to make. Seeing as for now I have the 2 ways, so I don't need the boxes I have started....but what I can do with them is flip them on their sides and end to end the make a perfect base for my TV. Thus giving me the perfect space for the center channel. I am thinking the same 5.25 peerless woofers (2) on each end getting .4 cf each sealed. Then in the middle between them I found a full range 2" peerless. Haven't decided on 2 or 4 of them....any opinions on that? I can get .2 cf per for them.

Also you said someone might could help with the crossover layout? That would be greatly appreciated. If so I can give exact numbers and speakers I want. Let me know.

Gonna get a 5.1 reciever @ 100 per, I can just run the 2 ways, and the center channel without the other leads hooked up without any problems for now right? Once I get that going I can make a decision on some floor standing front speakers with some kick to them, got some good ideas from the projects on PE. Might even start on my all Vega system with a set of them with the 8's in them.

Anyway I just wanna get the center channel before I get the reciever so I can atleast enjoy some surround with the 2 ways in the back corners and the center channel box under the TV. I feel like that's a good start then I can fill in the empty spaces that I hear, and finish my sub box.

Back to using the same speakers I had in mind before, just using two of the woofers. The 2" peerless were not shielded so...

Just gonna go with the same tweeter in the middle and the two 5.25"s on the outside. And I believe gonna go with this......

Parts-Express.comayton XO2W-2K 2-Way Crossover 2,000 Hz | polypropylene capacitor polypropylene LOW PASS CROSSOVER low pass loudspeaker high pass dayton capacitor Crossovers daytoncrossovers-10408
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