Ported AXIS

[adwilk]

I want to build one of these so bad I can't stand it... I'll be watching this very closely...

 

[WmAx]

I won't be under powered with the ported design will I?

Well, it can always use more power. But you will get much more SPL out of it under 30Hz with the same amp when it is ported.

-Chris

 

[WmAx]

BTW, here is a picture of the incredibly massive 15" AXIS driver's motor:

-Chris

 

[adwilk]

Well, it can always use more power.
-Chris

Suggestions?

 

[WmAx]

Suggestions?

QSC makes an amp that is suitable, the HD4050, with double the output of an EP2500, but the amp will cost around $1000. As such, most people are not willing to go from $300 for an EP2500 to $1000 for a QSC with double the power. Also realize, to have that QSC operate properly, you ideally want to have a 220V line to your listening room and use that version of the amp. But a dedicated 120V 20A line would suffice for home use.

-Chris

 

[ParadigmDawg]

Why does yours look like it has some woven carbonfiber in it and mine doesn't?


Never mind, I think mine does too, I just never noticed it.

BTW, here is a picture of the incredibly massive 15" AXIS driver's motor:

-Chris

 

[adwilk]

Suggestions?

Could you use 2 EP2500's each bridged to a voice coil?

 

[ParadigmDawg]

I was told no....

Could you use 2 EP2500's each bridged to a voice coil?

 

[WmAx]

Could you use 2 EP2500's each bridged to a voice coil?

No, as it has 2 Ohms nominal per voice coil. The Ep2500 is only stable to 4 Ohms bridged mono.

-Chris

 

[ParadigmDawg]

Shouldn't you be designing my box vs. playing around on here.....

No, as it has 2 Ohms nominal per voice coil. The Ep2500 is only stable to 4 Ohms bridged mono.

-Chris

 

[adwilk]

I was told no....

No, as it has 2 Ohms nominal per voice coil. The Ep2500 is only stable to 4 Ohms bridged mono.

-Chris

Bummer... So the 2ohm VC's are wired in series to achieve a 4ohm load...? This is all a little fuzzy from my car audio days...

 

[WmAx]

Bummer... So the 2ohm VC's are wired in series to achieve a 4ohm load...? This is all a little fuzzy from my car audio days...

Yes, wired in series to get a 4 Ohm load.

-Chris

 

[Alex2507]

Was for me.

It's a great thing to do.

I take it you are talking about using a 2x4 as a guide.
You can cut the wood with a dull rock too but it's not recommended.
At least step up to using a broken beer bottle.

 

[lsiberian]

I take it you are talking about using a 2x4 as a guide.
You can cut the wood with a dull rock too but it's not recommended.
At least step up to using a broken beer bottle.

I use my snake fangs actually. It takes several bites though and that ply stuff is just nasty with all the glue. There is always the gun method. But you have to shoot in a straight line for that.

 

[Alex2507]

When you use a guide you typically add 1-1/2 inches to your cut piece dimension to the mark where the guide will rest. 2x4's have a rounded edge that will make it tough to get a good alignment with and the saw base will ride along that edge in a different way at the curled up front and flat low profile middle. 2x4's are never straight either.

It's hard enough to get nice cuts with a straight edge. I just think that if you're building a cabinet for a $750 driver and you want it to look good you should start with accurate cuts. A table saw is better but a $125 circular saw with a 40 tooth blade and a straight edge will get you workable cuts. The straight edge is not the place to start cutting corners. The 2x4 guide option is counter productive to obtaining a quality cabinet.

 

[ParadigmDawg]

I can get a table saw from father in law, if it will fit into a SUV. Her Dad used to do a lot of woodworking but he is really getting up in age and can barely get around now much less use a tool. I can take whatever I need from him, just need to figure out what all I need.

Any specific clamps I need to be looking for?

When you use a guide you typically add 1-1/2 inches to your cut piece dimension to the mark where the guide will rest. 2x4's have a rounded edge that will make it tough to get a good alignment with and the saw base will ride along that edge in a different way at the curled up front and flat low profile middle. 2x4's are never straight either.

It's hard enough to get nice cuts with a straight edge. I just think that if you're building a cabinet for a $750 driver and you want it to look good you should start with accurate cuts. A table saw is better but a $125 circular saw with a 40 tooth blade and a straight edge will get you workable cuts. The straight edge is not the place to start cutting corners. The 2x4 guide option is counter productive to obtaining a quality cabinet.

 

[sawzalot]

I can get a table saw from father in law, if it will fit into a SUV. Her Dad used to do a lot of woodworking but he is really getting up in age and can barely get around now much less use a tool. I can take whatever I need from him, just need to figure out what all I need.

Any specific clamps I need to be looking for?

Does he have any cash ?

Just kidding good deal with the table saw no builds are out of reach now,I guess they never really were.I tried to skip the Dcx like you suggested with my kappas but just couldnt get them to work like that either I'm getting the feel for it now though.

 

[sawzalot]

quick clamps are good to hold two pieces until you get em all straight and square but the real clamps you need are the long pipe clamps or the newer styles that open up to at least 30 " they are the tool thats really needed four would be ideal but two will get you there.I only used two clamps cause I used an occasional brad nail here and there,like a hundred or so lol,but depending on your finish some times nails are out of the question so the more clamps the better.

 

[Alex2507]

Any specific clamps I need to be looking for?

the more clamps the better.

That pretty much says it all.

You still need the circular saw and need to make a 'sled' as I call it because that really is the best guide. I honestly believe your best bet is getting your wood working buddy to hang out some. A cordless drill ( Dewalt 14.4 XRP ~ $200 ) will help. I got 5 bucks that says PD doesn't know what a brad nail is and you know he doesn't have a compressor and gun so ...

I understand that you want a new hobby, but this??? Dude, it's work and it's gonna be hot and wouldn't you rather drink frosty cold beers and pay somebody? You shouldn't do this with a buzz. Sales is a tough business if you're all maimed and $h!t. Even when I show people how to use table saws it makes me nervous as hell. Then it's dusty and noisy. You gotta wear safety glasses and you will still have crap in your eyes and you should wear ear protection. Take your SPL meter and see what the saw puts out at 2 feet and then rip a 2x4 and check that. You may come out of this deaf and blind missing a couple of fingers.

You ever consider skydiving? It's safer and more fun.

 

[Davemcc]

Clamps like this ought to work. Just make sure you get them longer than the largest surface you need to clamp.

BTW, I'm sure PD knows what a compressor is. You can't hang around race car shop and not know about air tools. The good news is that portable air compressors have become very inexpensive lately. I suggest buying one with an air nail gun, air drill and air sander.