Complete newbie (I mean really new...!) looking for a simple project to learn from - Page 2 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #11 of 19 Old 03-14-08, 09:34 PM
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Re: Complete newbie (I mean really new...!) looking for a simple project to learn from

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darrenh wrote: View Post
Hi guys

..

Questions:

Can I create a passive sub and use an external (inexpensive) stereo amp to drive it?
Do I need to use a crossover?

I love the look of those cylindrical subs!

So much to learn!!! Please be gentle with me!
Yes you can build a passive sub and use a cheap plate amp...I had a 12" sub in a sealed box with a $125 plate amp that killed my current 15" TC sound sub and Buttkicker amp.

Most plate amps will come with a crossover.

There is a TON of info here on building sonosubs...go for it!!!
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post #12 of 19 Old 03-15-08, 06:28 AM
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Re: Complete newbie (I mean really new...!) looking for a simple project to learn from

What is the Xmax of this sub? Are you intending to use it for home theater?




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post #13 of 19 Old 03-15-08, 12:38 PM
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Re: Complete newbie (I mean really new...!) looking for a simple project to learn from

THe xmax of the sub is 11mm (alledgedly - I had to do some trawling as the info didn't come with the speaker). I would like to use it for home theatre, but we do not have acres of space for a big sub. I also have not been able to source a cheap sub plate amp. I have been looking for someone who has accidently stuck their foot through their driver and would like to sell me the rest of their sub!!! I think the cheapest plate amp I have able to find is £90 ($180!)

What is an EBS3 vented sub?

Thanks for everyone's inputs to date
 
post #14 of 19 Old 03-15-08, 12:44 PM
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Re: Complete newbie (I mean really new...!) looking for a simple project to learn from

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darrenh wrote: View Post

What is an EBS3 vented sub?

Thanks for everyone's inputs to date

http://www.diysubwoofers.org/prt/ported5.htm

the 3 refers to being an extra 3db down from the drivers res freq.
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post #15 of 19 Old 03-15-08, 04:14 PM
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Re: Complete newbie (I mean really new...!) looking for a simple project to learn from

hmmmm.... had a look at the link.... I kind of understand, but the 'side-effect' looks like a larger box requirement as a trade off for deeper bass? Also, how can I model this in Win ISD?
post #16 of 19 Old 03-15-08, 04:34 PM
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Re: Complete newbie (I mean really new...!) looking for a simple project to learn from

It's in a drop down box on the "chose alignment" screen - right after you pick vented and next. Yeah, you should get a box tune at Fs of driver or a little less - in your case 30.

PS, we can help you find an amp that will be lower than 180...

Warmon - "know what I mean Vern"

Last edited by Warmon; 03-15-08 at 04:43 PM. Reason: amp
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post #17 of 19 Old 03-15-08, 05:14 PM
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Re: Complete newbie (I mean really new...!) looking for a simple project to learn from

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Warmon wrote: View Post
It's in a drop down box on the "chose alignment" screen - right after you pick vented and next. Yeah, you should get a box tune at Fs of driver or a little less - in your case 30.

PS, we can help you find an amp that will be lower than 180...
I have been looking through the site a little and come across Apex Jr who has a Cerwin Vega 220V amp plate for $55. I have just emailed Steve to find out if he can ship to the UK and for how much... (plus I have to add 20% import duty on!)

I think I can't find the drop down box is because I only have Win ISD Beta rather than the pro version. For some reason pro doesnt like shutting down on my PC and causes an error....
post #18 of 19 Old 03-15-08, 06:01 PM
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Re: Complete newbie (I mean really new...!) looking for a simple project to learn from

In that case, I suggest you take your #6 plot, change the tune to 30 and then adjust the volume up until you get a curve that looks very similar. That Cerwin Vega 220V amp is great!..if you have 220v outlet nearby. At one time I was gonna buy a couple of these and run me some 220 circuits...

Warmon - "know what I mean Vern"
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post #19 of 19 Old 03-22-08, 08:04 AM
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Re: Complete newbie (I mean really new...!) looking for a simple project to learn from

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Warmon wrote: View Post
In that case, I suggest you take your #6 plot, change the tune to 30 and then adjust the volume up until you get a curve that looks very similar. That Cerwin Vega 220V amp is great!..if you have 220v outlet nearby. At one time I was gonna buy a couple of these and run me some 220 circuits...
Got one on order! Was sent yesterday, so will probably be with me in two weeks or so... I was thinking of mounting it in its own box so I can use it to power various boxes as I start playing.
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