First OB

[mkane77g]

Almost afraid to post this here. No measurements, plots, graphs, nothing. 15" woofer, 10" full range. Plate amp or Mac275 for the bottom, SET amp on the full range speaker. Active crossover. 24x48"

 

[mkane77g]

Darn

 

[CharlieLaub]

I've seen worse.

If you just throw an active LR4 crossover on it I think you will not reach the full potential of the system. I heard a 2-way OB in a large baffle recently and it was pretty good sounding for what it was. The key is in getting frequency response corrections done sufficiently well. Do you have some idea about what the shape and type of frequency response correction that you will need to apply?

 

[DieterK]

Nice looking. Why do you make the holes in the sidewings? Enjoy listening and develop them for best performance. Tell us more about your build!

 

[mkane77g]

Should there be no hole? Something to grab on to when moving around. The next pair of legs will have no holes then. I have no idea about frequency responce corrections but I search. Woofer is a Alpha 15, fullrange is AN 10" ferrite

 

[scottjoplin]

The wings have the effect of making the baffle wider, so to have holes in them defeats the object........if that was the object!

 

[mkane77g]

Got that. No holes in the other baffle.

 

[perceval]

It's a good start.

Welcome to the world of OB sounds. Lots of tweak to be done, but most of them simple enough. Keep reading on them, keep listening to them and find what you like.

 

[ewollowe]

if you put no holes in the other baffle they'll have different responses.

And BTW they're better built than plenty of my "fun" efforts

 

[mkane77g]

Thanks for the feedback. How about I cover the holes from the inside with a 1/4" piece of plywood. I'm going to make a mirror image OB tomorrow along with some woofer bracing a a bit of beautification. Fun effort here for sure. Lot's to learn.

 

[ewollowe]

Covering the holes should give you more bass and at least similar sound from each speaker. My shonky OBs had surprising bass, nothing else good about them mind you but they were just a fun bit of experimentation.

 

[anji12305]

That's the spirit. When you have finished, every part will be YOURS... few can make that claim.

Kudos

Sent from my Nexus 6 using Tapatalk

 

[scottjoplin]

You can't go too far wrong with OB so long as you follow the golden rule to keep them well away from walls (primarily the front wall), preferably a minimum of 3 feet. Siegfried Linkwitz's site is very informative

 

[mkane77g]

Room is big enough where placement shouldn't be a problem

 

[DieterK]

You can't go too far wrong with OB so long as you follow the golden rule to keep them well away from walls (primarily the front wall), preferably a minimum of 3 feet. Siegfried Linkwitz's site is very informative

OB works even good with less distance. You must find the point for good midrange and bass response. My OB stands 65cm in front of the wall and will work fine!

 

[scottjoplin]

My understanding is that the distance is for psychoacoustic reasons, namely that a delay of the first reflections of over approx 6ms ensures that they are perceptually masked. Angling of the speaker and diffusion can help achieve this delay

 

[mkane77g]

Second baffle at the same stage as the first. Got a bit dehydrated and started making mistakes. Put the power tools away for another day.

 

[mkane77g]

Baffle bracing and some holes taken care of.

 

[mkane77g]

better pic

 

[mkane77g]

I need another pair of Y cables to be able to utilize the woofers so I'm just using the full ranger's. I like em'.