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Open Baffle Epiphany!

cubdog said:
Two more questions. How does one determine the best size full range drivers to pair with the Eminence or other bass drivers?
Also how much difference in bass output would there be using 12 in. rather than 15 in bass drivers? Thanks.

cubdog
Click to expand...

I'm using vintage University Diffaxial speakers.

3 way speakers with a 12" woofer that are very efficient.

With a wide enough baffle they get quite low enough for my tastes.

I briefly considered adding some 15" woofers and running the 12" as a midrange but decided that in my smallish room that it would be overkill.

Art
 
I was just reading up on the MiniDSP site. As I suspected the information there is way over my head. I'm still not sure if you need one unit per speaker or two. I would imagine, and hope, it's only one but I did not see where that was addressed.

cubdog
 
As you might expect electronic crossovers are not immune to the debate of which is better, digital or analog? Some say analog actives offer a sonic advantage while others believe the advantage of digital comes from a pure digital source that is not converted to analog and then back to digital. From what I've read there seems to be agreement that digital offers more flexibility and control.

Here is a user manual link to the Nelson Pass analog active crossover which is specifically designed for use with OB speakers. He also includes plans for his open baffles which use the Eminence 15 Beta.

http://www.firstwatt.com/pdf/prod_b5_man.pdf
 
dnewma04 said:
One for a pair of 2 way speakers. It has 2 inputs and 4 outputs.
Click to expand...

Thanks I should have picked up on that.

I don't like the fact that this limits one to a 2 way speaker. I don't know if I would ever feel the need to add a tweeter to the mix.

cubdog
 
FMB42 said:
This technology transformed automotive audio into what it is today.

Meanwhile, I'm slowly going over a Yamaha R 700 Natural Sound receiver that I plan on using to power 8 inch F-R single driver open baffle speakers. My thoughts are that this system might make for a good single driver OB setup. If worse comes to worse, I'll add tweeters to the mix...
Click to expand...

It works for me! My Yamaha AVR auto EQ really smoothed out the response of my 8" Goldwood drivers so that no tweeter is necessary. When I used them with a stereo receiver, I turned up the highs a little. Peace and goodwill.
 
To clear up a bit on the miniDSP.

-2 in 4 out model is for two way speakers. It works in the line level part of the chain, before the power amps.
-You will need to bi-amp the speakers.
-You use the computers USB to make adjustments. This can be made on the fly. When you are happy with the adjustments, you can unplug the computer and power the miniDSP using any cheap USB charger.
-Your adjustments are held in the internal memory of the MiniDSP
-You can add a ridiculous amount of filters, something like 60 or so. These include low pass, high pass, notch, shelves, EQ.
-I highly recommend getting a measuring mic to help measuring your speakers and making the adjustments with MiniDSP. The one MiniDSP sells is cheap and works great.
-In order to use MiniDSP, you will also need the software to make the adjustments. It costs $10 and is downloadable from the MiniDSP website.
-MiniDSP website has great tutorials on how to use the unit.
-There is also a free speaker measuring software called REW. You can measure your speakers with this and export the measurement to MiniDSP software and it makes all the filters automatically for you.
-Once you spend a few minutes using it, the interface is easy to follow.
 
cubdog said:
Active as in the Berhringer units or yours, is it an, Ashley Paul?

cubdog
Click to expand...

I have an Ashly and a Behringer. Both are 2 ways and pseudo 3 ways.

While using them to crossover the LF and HF they still allow a sub connection. You can change the frequency x10 which allows them to work on a tweeter and full ranger while controlling the bass through the sub connection.
 
cptnCanada said:
To clear up a bit on the miniDSP.

-2 in 4 out model is for two way speakers. It works in the line level part of the chain, before the power amps.
-You will need to bi-amp the speakers.
-You use the computers USB to make adjustments. This can be made on the fly. When you are happy with the adjustments, you can unplug the computer and power the miniDSP using any cheap USB charger.
-Your adjustments are held in the internal memory of the MiniDSP
-You can add a ridiculous amount of filters, something like 60 or so. These include low pass, high pass, notch, shelves, EQ.
-I highly recommend getting a measuring mic to help measuring your speakers and making the adjustments with MiniDSP. The one MiniDSP sells is cheap and works great.
-In order to use MiniDSP, you will also need the software to make the adjustments. It costs $10 and is downloadable from the MiniDSP website.
-MiniDSP website has great tutorials on how to use the unit.
-There is also a free speaker measuring software called REW. You can measure your speakers with this and export the measurement to MiniDSP software and it makes all the filters automatically for you.
-Once you spend a few minutes using it, the interface is easy to follow.
Click to expand...

I think it only fair to mention here that REW is not the type of program where you plug up your mic and a few minutes later you're cookin'. I found the learning curve rather steep....whereas with a Dayton OmniMic it was plug the mic in and a few minutes later you're cookin'. Of course, the OmniMic is not free...but what's your time worth?
 
cptnCanada said:
To clear up a bit on the miniDSP.



-2 in 4 out model is for two way speakers. It works in the line level part of the chain, before the power amps.

-You will need to bi-amp the speakers.

-You use the computers USB to make adjustments. This can be made on the fly. When you are happy with the adjustments, you can unplug the computer and power the miniDSP using any cheap USB charger.

-Your adjustments are held in the internal memory of the MiniDSP

-You can add a ridiculous amount of filters, something like 60 or so. These include low pass, high pass, notch, shelves, EQ.

-I highly recommend getting a measuring mic to help measuring your speakers and making the adjustments with MiniDSP. The one MiniDSP sells is cheap and works great.

-In order to use MiniDSP, you will also need the software to make the adjustments. It costs $10 and is downloadable from the MiniDSP website.

-MiniDSP website has great tutorials on how to use the unit.

-There is also a free speaker measuring software called REW. You can measure your speakers with this and export the measurement to MiniDSP software and it makes all the filters automatically for you.

-Once you spend a few minutes using it, the interface is easy to follow.
Click to expand...


Thanks, nice summary.
 
Drumolator said:
It works for me! My Yamaha AVR auto EQ really smoothed out the response of my 8" Goldwood drivers so that no tweeter is necessary. When I used them with a stereo receiver, I turned up the highs a little. Peace and goodwill.
Click to expand...

Thanks for the heads-up! I'm going to go with the 8" Goldwood GW-8003/8 F-R drivers on Wild Burro Betsy open baffles. Not sure how I missed these economical drivers...
 
I wonder how the Goldwoods would work with a pair of those 15 in Sansui's I have. Might be a way to experiment without spending a lot of money. I'll still play around with something I have laying around first. And to think I thought I was done spending money on speakers. :no::D

cubdog
 
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