2x10 inch tops build

[Mihai Cimpoeru]

Hello,

This is a build log of my pa tops.
I'm using Paudio E10-200S and B&C DE250 with ME20 waveguide.
The enclosure is about 25 liters and it will be tuned to 65 hz . It's made from 15 mm plywood and will be painted Turbosound Blue.

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An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

 

[LORDSANSUI]

great job

 

[Greg32]

They look great, how do they sound?

 

[Mihai Cimpoeru]

I don't have the drivers yet, or a crossover.

After painting i will do some measurements for a crossover.

 

[Mihai Cimpoeru]

I got some more work these days, i got the drivers, grill and grill mounts.
Also i cut the wholes for the handles.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

 

[Mihai Cimpoeru]

We did some measurements for the crossover.
I like the sound of it, the spl is verry high, but as expected there is no low end.
I hope that 1.6 khz is not too low for DE250

 

[TBTL]

Could you please upload the images to this forum? The links are all dead here.

 

[Mihai Cimpoeru]

I think there is a problem with the hosting site.

 

[TBTL]

Looking good!

 

[Mihai Cimpoeru]

What do you think about the crossover? I know B&C say DE250 minimum crossover point is at 1.6 khz, but how much power can it take? I am planning to use the speaker with a 1000w per channel.

 

[Mihai Cimpoeru]

Paint is on.

 

[Greg32]

looking very smart, do you have grills yet? how do they sound?
Greg

 

[Mihai Cimpoeru]

Yes i have grills but i have to paint them. They sound nice, i wanted DE250 for highs after using it on my 3 way speakers, spl is high, but they don't go verry low ( 25 liters box ).

I just hope that DE250 likes a 1.6 khz crossover.

 

[Mihai Cimpoeru]

Almost done, crossovers are next

 

[Mihai Cimpoeru]

The crossovers are up and running. They still need some finishing touches.

In the meantime i changed the enclosures for the subs from 150L and 39 hz tunning made from particle board to 190L 38hz (the tunning will be lower once i add the damping material) made from plywood.

 

[Mihai Cimpoeru]

And they are done.
I used them last weekend at my wedding with two additional subwoofer.
The subs were powered by a Proline 3000, and the tops by a plx3002.

 

[TBTL]

Congratulations with your wedding!

That's a professional looking system. How did it perform? Did you need the additional subwoofers?

 

[Mihai Cimpoeru]

Thank you.

The system performed great. The tops were great, they sounded hi-fi-ish. The additional subwoofers were there for the sound not the spl. I wanted low bass and throw. The first ideea was to use 6 subwoofers but it was too much.

 

[Cableaddict]

Mihai,

I assume that both 10's are covering the same frequncies, yes?
Do you not have any issues with phase smear, using two 10" ?

I only ask because I had previously asked on several forums about my idea of building a 12" coaxial, with an added (plain) 12" for more low mids throw. Everyone said it would be a bad idea. I got the same response from techs at Radian & B&C.

Which I never fully bought into, seeing as there have been many dual 10" commercial designs in the past. So, are those people just being overly picky? Obviously, you like the sound of these, but do you here any muddiness in the low mids, especially from the sides?

 

[Mihai Cimpoeru]

The problem with dual mids in MMT configuration is that the lowest woofer is too far from the driver. Also this configuration (depending on drivers) has a peak at 200 hz of about 3-4db that cand sound muddy. The acoustic center of my speakers are in the middle of the upper midbass. If you measure the speaker on the vertical plane you will get dips and peaks, but the speaker will sound ok.

If you use MTM configuration both mids are as close as possible to the driver but far apart from each other, the mids won't couple and you will get weird polar response in the vertical plane.

Both have issues, maybe using a 2.5 crossover is better sounding but lower in SPL.

The midbass drivers are not the best, but for the price (200e for all 4) i am verry satisfied. Maybe something like 10HPL64 will sound better, but for now i will keep these drivers.