Building a 410HE?

Morson93 · #1 09-09-2010, 02:37 PM

Looking to build a Ampeg SVT410HE with my dad as a project. We are both capable of doing this and have all the tools required for the job (I think?). My dad is an electrical engineer, so he knows all the wiring etc. I'm a Toolmaker and engineer, so i can do just as much as him, but without the electrical, so this can be done. All i need is some information off you guys. 1st of all, has anyone done this before? if so where did you get all your suplies? What speakers does this cab use? Can someone point me out to a site with good prices? Does anyone have any plans of this cab? Any templates? Anything just to make life easier?

Really interested in doing this, so would appretiate all the help!

T-Bird · #2 09-09-2010, 02:55 PM

Hi.

Copying an existing generic design isn't usually feasible.

If You're looking for a fun and rewarding project, the BFM folded horns and/or fEarful cabs would give a lot more. With these more complex cabs, You can actually save a quite a bit of money.

IMHO as always of course.

Regards
Sam

Morson93 · #3 09-09-2010, 03:09 PM

But i want to do this, build it to spec, sounds silly but i don't care. This is what i want, i just want help to do it

Bmorefoozler · #4 09-09-2010, 04:50 PM

It's a sealed cab, the dimensions are really all you need. For speakers, use either Emminence Legend B810 or Jensen Mod10's. I know at least with the Jensen's you have several options for impedance which would allow differenct wiring setups and total impedance to suit your taste. With the legends you will parrallel 4 32 ohm drivers for an 8 ohm cab.
If you made it from nice lightweight plywood you might even save a significant ammount of weight. Auraco from Lowes comes highly recommended around these parts.

7 pounds for the emminence, half that for the Jensens. The Jensens apparently have more high end content.
24x25x16 internally seperated into two compartments. 91 pounds should be easy to undercut.

timbledum · #5 09-09-2010, 04:59 PM

Just build a fEarful................
.....................
.....................
JUST KIDDING!!!! Go for it.
Because they use customised speakers (I presume) you want to check any cab you think off out on Winisd (free cab design program for windows) just to make sure it will work with the speaker you choose...

Adding on to Bmorefoozler though, one advantage of building your own cab is you can use thinner lighter ply and use bracing to retain strength and wall rigidity while greatly reducing overall weight. Commercial cab builders don't do this because of greatly increased labour costs, which don't matter too much if you're doing the building only one.

Bmorefoozler · #6 09-09-2010, 05:04 PM

Quote:

Originally Posted by timbledum

Just build a fEarful................
.....................
.....................
JUST KIDDING!!!! Go for it.
Because they use customised speakers (I presume) you want to check any cab you think off out on Winisd (free cab design program for windows) just to make sure it will work with the speaker you choose...

Adding on to Bmorefoozler though, one advantage of building your own cab is you can use thinner lighter ply and use bracing to retain strength and wall rigidity while greatly reducing overall weight. Commercial cab builders don't do this because of greatly increased labour costs, which don't matter too much if you're doing the building only one.

And contrary to what seems obvious, the parts that need to be braced are the centers of panels, where the mox flwx can occurr, not the corners. Use a matterss topper on the 5 inside walls and you have another step better then a commercial cab.

Morson93 · #7 09-09-2010, 05:26 PM

Which speakers are closer to the 410HE sound?

If i use a different material wood or a lighter wood, won't that make a difference in the sound?

Any ideas where i can get the panel from on the back?

What about the grill and covering the amp?

Bmorefoozler · #8 09-09-2010, 05:55 PM

Quote:

Originally Posted by Morson93

Which speakers are closer to the 410HE sound?

If i use a different material wood or a lighter wood, won't that make a difference in the sound?

Any ideas where i can get the panel from on the back?

What about the grill and covering the amp?

I believe that the Legends are the replacement parts for 8x10 and 419he's. They are absolutely designed specifically for use in that cabinet. JohnK10, if willing, would likely be best to answer your question in regards to tone.

Wood should not affect sound. Most places that sell speakers will also sell the jacks, corners, grills, etc. Partsexpress.com would be a good place to start.

Morson93 · #9 09-10-2010, 07:20 AM

Okay, so i'll go for the legend speakers, but how much are they and where can i buy them?

What kind of wood would your recommend for this?

Is there any drawings/plans for a 410 cab? 3rd angle drawings, assembely drawings? Anything

Morson93 · #10 09-10-2010, 07:34 AM

There is a 16ohm and 8ohm speaker, which ones to make a 8ohm 410?

AlexanderB · #11 09-10-2010, 07:46 AM

Buy the 8 Ohm version and let your EE father show you how to wire them in series-parallel.

/Alexander

AlexanderB · #12 09-10-2010, 07:52 AM

Wood makes a tonal difference, too. You will find commercial HiFi stereo speakers (where sound comes before robustness) out of concrete, metal, plastic, resin/fibre compounds, MDF, particle board or solid wood etc, but I have never seen any made of plywood. The strong plywood preference for stage / PA usage is more related to that plywood is very tough and survives abuse that would destroy other cabinets. It is also lighter than some of the other materials.

Morson93 · #13 09-10-2010, 09:09 AM

so buy 4 8Ohm Eminence Legend Speakers. About £100

What about The Horn?

panama · #14 09-10-2010, 09:19 AM

I understand you're doing this because "you want to", but you could have this cab used for like $300.

kuys · #15 09-10-2010, 09:33 AM

Quote:

Originally Posted by panama

I understand you're doing this because "you want to", but you could have this cab used for like $300.

That's what I was thinking.

The parts will cost more than a used one and depending on how well the build goes it could end up costing more than a new one!

BassmanPaul · #16 09-10-2010, 09:47 AM

This is the "gotcha" in the DIY world. Small scale pricing puts you at a distinct disadvantage. If you do the job properly, and why would you waste time and money in not doing so?, You will always end up paying more than you could buy commercially.

Ampeg make adequate speaker cabinets but they are not even in the same league as the fEarful and Bill Fitzmaurice designs. You should look at Alex's Barefaced offerings and he's in the UK.

If you are going to invest time, effort and money into a project why not make that project something superior?

Paul

Bmorefoozler · #17 09-10-2010, 09:50 AM

Quote:

Originally Posted by Morson93

Okay, so i'll go for the legend speakers, but how much are they and where can i buy them?

What kind of wood would your recommend for this?

Is there any drawings/plans for a 410 cab? 3rd angle drawings, assembely drawings? Anything

exterior dimensions are 25x24x16, there is one internal divider making 2 sealed compartments.

Auraco from Lowes is the most commonly available, lightweight plywood. Get roughly 1/2" stock. That would make your internal dimensions slightly larger, so you should easily be able to get away with a much more simple 24x24x16 box. One sheet of plywood will do, including bracing. I would brace at least a littile in the oppsoite direction fo the divider, middle to middle.

http://www.parts-express.com/pe/show...TOKEN=84857510

There is one place, it might be worth shopping around however. The Jensens are closer to $40.

Box material should not have a sound, only a rigidity factor. MDF Bracing thinner wood correctly shoudl have to overall same result as using a more rigid material.

Bmorefoozler · #18 09-10-2010, 09:53 AM

Quote:

Originally Posted by kuys

That's what I was thinking.

The parts will cost more than a used one and depending on how well the build goes it could end up costing more than a new one!

Because, he could pretty easily imporve on the design. it's a 91 pound 4x10... He could probably get closer to 60 pounds and near that $300 mark using Jensens, which according to some, would be a more pleasnt tone as well.

I understand it';s not the best idea, but if it's really what he wants to do, there are worse ideas.

BassmanPaul · #19 09-10-2010, 10:02 AM

OP, it would be a good idea to fill out your profile properly. You are getting advice from folk here in North America which will have no relevance if you are in the UK.

Paul

billfitzmaurice · #20 09-10-2010, 11:32 AM

Quote:

Originally Posted by Bmorefoozler

Because, he could pretty easily imporve on the design. it's a 91 pound 4x10...

The #1 improvement to a 4x10 is to not build a 4x10. It's the poster child of how bass cabs should not be configured, and anyone who does the least bit of research into how speakers work would never consider building one.

Quote:

This is the "gotcha" in the DIY world. Small scale pricing puts you at a distinct disadvantage. If you do the job properly, and why would you waste time and money in not doing so?, You will always end up paying more than you could buy commercially.

+1. If you're going to build a cab the only reason for so doing is to build something that's better than what you can afford to buy, and that means something other than a 4x10, or for that matter just about everything else from commercial sources. If you must have a 410 HE buy a 410 HE.