Powered 2-way I-pod system for the wife.

[annunaki]

Hey gang. Here are some early photos of my latest project. I am building my wife a semi portable, self-contained, powered speaker system for use with an I-pod or other audio source for Christmas. It could even be used as a computer speaker or as a powered bookshelf speaker.


It consists of the B&G Neo3PDR planar Tweeter, Dayton Audio RS150-4 woofer and the Dayton Audio MCA2258 Bi-amplifier. The enclosure is .50ft^3 tuned to 50hz and has a net vent velocity of just under 17m/s. This offers a -3db point of 48hz and a -6db point of 42hz.

The crossover points are at 3Khz at 24db/oct.

Here is a shot of the bottom of the enclosure attached to one of the sides with the vent attached. It is lying in it's side in this picture and on the bottom in the second:

Here is another photo showing some of the bracing with a dry fit:

More to come in the future...

 

[Guiria]

Very interesting. A project like this is on my to do list. Are you using the raw frequency response of the drivers apart from the xover point or will you have some passive xover parts as well? Are you integrating some type of iPod dock or will you just use the inputs on the back of the amp?

Seems like a fun project, my wife would love it if I did something like this for her

 

[annunaki]

Very interesting. A project like this is on my to do list. Are you using the raw frequency response of the drivers apart from the xover point or will you have some passive xover parts as well? Are you integrating some type of iPod dock or will you just use the inputs on the back of the amp?

Seems like a fun project, my wife would love it if I did something like this for her

No passives. Active crossover built into the amplifier at 3Khz hp/lp. The tweeter will have a 42mfd cap on it for protection during amp turn on however.

I will just use the inputs for now, but I may find a piece for docking and better integration.

 

[annunaki]

Here are some more updates:


Front view with some rockwool added:

Rear view bracing added with internal vent roundover:

Rear view additional bracing added:

Front view baffle attached, woofer holes added, recesses added. Sloppy opening around the tweeter hole :

 

[lsiberian]

Looks great. What table saw are you using?

 

[annunaki]

I used my brother's table saw a couple weekends back.

 

[smcgov34]

looks great unless those are Amish headphones!

 

[annunaki]

looks great unless those are Amish headphones!

What?

 

[abboudc]

Hey gang. Here are some early photos of my latest project. I am building my wife a semi portable, self-contained, powered speaker system for use with an I-pod or other audio source for Christmas. It could even be used as a computer speaker or as a powered bookshelf speaker.


It consists of the B&G Neo3PDR planar Tweeter, Dayton Audio RS150-4 woofer and the Dayton Audio MCA2258 Bi-amplifier. The enclosure is .50ft^3 tuned to 50hz and has a net vent velocity of just under 17m/s. This offers a -3db point of 48hz and a -6db point of 42hz.

The crossover points are at 3Khz at 24db/oct.

Here is a shot of the bottom of the enclosure attached to one of the sides with the vent attached. It is lying in it's side in this picture and on the bottom in the second:

Here is another photo showing some of the bracing with a dry fit:

More to come in the future...

Very cool! I'm much lazier...got a Cambridge Soundworks CD740 as the "portable ipod" system.

How are you planning to finish it? Wood veneer?

 

[annunaki]

Very cool! I'm much lazier...got a Cambridge Soundworks CD740 as the "portable ipod" system.

How are you planning to finish it? Wood veneer?

Not sure yet. I was thinking black with gray hand prints from our kids actually. Perhaps another color scheme. I am still up in the air with that.

 

[annunaki]

So I have done a lot of work on this project since my last post. Unfortunately camera decided to stop working and I managed to scrounge up a $20.00 one I got for my daughter. The picture quality is not that good but hopefully one can make them out.

Be advised, I used a hammered texture red finish. If it looks odd in spots it is like tricks with the uneven texture of the finish.


Here is an unloaded front view.

Here is a front view with the drivers loaded. I pulled big gaff while removing the woofer after a test run. I popped a hole in the surround and dented the cone on the woofer. Thank god they are not expensive! If you notice an irregularity on the cone, that is it.

So how does it sound? With hip hop it is down right amazing in terms of output considering the goals of the project. I am still playing around balancing the woofer & tweeter levels. But it sounds quite good. The bracing worked very well along with the mineral wool as there is very little audible resonance.

 

[Moutee]

Awesome project! I've been looking to do the same for my brother in-law, except I don't know where to begin. I'd likely get hung up on the crossover.

 

[annunaki]

Awesome project! I've been looking to do the same for my brother in-law, except I don't know where to begin. I'd likely get hung up on the crossover.

No crossover to worry about as there are active X-overs built into the amplifier.