I would strongly recommend against using a generic off the shelf xover, it will not give you the best results. A xover specifically designed for the drivers and enclosure should be used. The other option is to go with an active xover, but you will still need to take measurements and tweak things to get it dialed in.
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1099 Center and Volt - 8 Alternatives
Hi all. I've been checking for months on stocks of these items, but so far no luck and Im getting really antsy to finish my theater! I was wondering if anyone has made a 1099 center, and or, volt - 8 alternative with available parts.
Volt 8
I found an old thread from NWCgrad on a volt 10 alternative, but not for the 8". I was thinking the Eminence Beta-8CX, but not sure about the compression driver or XO. Theyre going to be mounted in the ceiling, via a hacked mono price speaker. They're just for surround/atmos duty. Im not sure if they'll be in a sealed enclosure or open air. Parts express recommends these parts"
![3153858]()
1099 Center.
This one looks like its going to be a bit harder... I have access to a point to point router, so making the front baffle shouldn't be a problem (I drew and made custom front baffles for my Cinema-10s). Im not really sure where to begin on this though!
Any input would be greatly appreciated.
Thank you!
Volt 8
I found an old thread from NWCgrad on a volt 10 alternative, but not for the 8". I was thinking the Eminence Beta-8CX, but not sure about the compression driver or XO. Theyre going to be mounted in the ceiling, via a hacked mono price speaker. They're just for surround/atmos duty. Im not sure if they'll be in a sealed enclosure or open air. Parts express recommends these parts"
1099 Center.
This one looks like its going to be a bit harder... I have access to a point to point router, so making the front baffle shouldn't be a problem (I drew and made custom front baffles for my Cinema-10s). Im not really sure where to begin on this though!
Any input would be greatly appreciated.
Thank you!
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Right now im thinking that Ill get these 8" Pyle in ceiling speakers and gut them for a Beta 8cx and Eminence ASD1001.
www.parts-express.com
I can cut out the top and extend them if I need to with a 3d printed part and glue. They're 5.5" deep, which might not be enough, but right now the enclosure is about .16 cubic feet.
I have no idea where to begin on the crossover. I looked over some XSim threads and I think it's going to be way over my head for just this one project. Maybe I can start with a pre made XO and mod from there...
Home
www.parts-express.com
I can cut out the top and extend them if I need to with a 3d printed part and glue. They're 5.5" deep, which might not be enough, but right now the enclosure is about .16 cubic feet.
I have no idea where to begin on the crossover. I looked over some XSim threads and I think it's going to be way over my head for just this one project. Maybe I can start with a pre made XO and mod from there...
Alright. I screwed around with FPGraphTracer and XSim and made some squiggly lines. Im about 100% sure I did this incorrectly, but it's my first try. I found a very fuzzy schematic of an "Eminence PXB2:2K5CX 2-Way Speaker Crossover Board 2,500 Hz" and put it in XSim. This is what I got:
![3154124]()
Lol! No wonder the graphed line wouldn't change when I adjusted the values. Thank you. Removing the line results in this:
And Im not sure what this means, "Did you copy any impedance data?"
Thanks!
With additional curves and S1 polarity switched:
![3154156]()
Thank you for the response. I set the Beta8 to -3 and this is what I get:
Do you think it would be worth it to try and build one of these with the stock Eminence PXB2:2K5CX in a small sealed enclosure? PSA has a similar XO around the same price that has HF attenuation, but I can't find a schematic of it. Thanks!
Sorry, I think auto correct changed PRV to psa... This is the other XO im looking at:
www.parts-express.com
Its 3K5 instead of 2K5, but has a -6db high frequency attenuation. Not sure what to do, except for buying them both. But i'd rather not do that if any of you has a gut feeling as to which will work better
Home
PRV Audio 2DF3500 2-Way Crossover Terminal 3,500 Hz 12 dB/Octave Selectable 4-8 OhmPRV Audio's 2-way 3,500 Hz 2DF3500 crossover is designed to be used with passive (unpowered) speakers. A selectable 4 or 8-ohm woofer impedance allows you to use this crossover with single and double woofer...
www.parts-express.com
Its 3K5 instead of 2K5, but has a -6db high frequency attenuation. Not sure what to do, except for buying them both. But i'd rather not do that if any of you has a gut feeling as to which will work better
I got all the parts and worked on the speakers a bit last night. The Monoprice 4104 speakers that Im sacrificing seem like a pretty good deal. The optional back enclosure fits together really nicely and feels solid. I should have just installed these speakers as is! haha. Everything came out and the new speakers went in and fit well. I cut a hole in a piece of plywood to mount the speaker for testing. It got too late to do much of anything else, but I did make one test of only the tweeter, installed with no grill(or foam cover that came under the grill). On axis, 1m, 2.8v at 1k:
![3156668]()
![3156669]()
![3156670]()
![3156671]()
I had time to install everything in the enclosure. Right now Im just using the stock XO.
![3157217]()
This is just the CD, at 3', at 0, 15, 30, and 45 degrees @2.8v rms. It was tested installed in a 2'x2' piece of plywood and near the ground, very similar to how it will be installed in my ceiling. Other hard objects were at least 8-9 feet away.
![3157218]()
This is just the Beta8
![3157219]()
Both together:
![3157220]()
And just for kicks I ran the stock Monoprice speaker. Its interesting how similar it is to the Beta8 and ASD1001... I think I might just install two of them as is for atmos duty...
![3157221]()
This is just the CD, at 3', at 0, 15, 30, and 45 degrees @2.8v rms. It was tested installed in a 2'x2' piece of plywood and near the ground, very similar to how it will be installed in my ceiling. Other hard objects were at least 8-9 feet away.
This is just the Beta8
Both together:
And just for kicks I ran the stock Monoprice speaker. Its interesting how similar it is to the Beta8 and ASD1001... I think I might just install two of them as is for atmos duty...
Just FYI. It didn't dawn on me until later that the giant dip in the FR was around the XO frequency. I had the CD polarity switched on purpose, but I guess the store bought XO accounts for the reversed polarity and labels it as such. So I effectively hooked it up "correctly" (not phase reversed). So here is another sweep with the CD hooked up as it should be @ 2.8v. It's +/- 4db from 100 ish to 12k. Not great but Im sure Audyssey can work with that. I will probably work on the XO a bit.
![3166216]()
Better late than never. Here's the XO design I came up with. My first time using XSim - thankfully it runs well under Wine.
I don't remember where I got the FRD for the drivers. I think I had to eyeball the charts for the Beta 8 documentation. This is Beta 8CX woofers with Celestion CDX1-1446 compression drivers. The actual drivers I will use are B-stock Volt woofers from DIYSG. To keep things clean, I grabbed some "Classix II" crossover PCBs from eBay. It was a little tough to find crossover PCBs that included a tweeter L-pad.
![3166367]()
![3166368]()
I don't remember where I got the FRD for the drivers. I think I had to eyeball the charts for the Beta 8 documentation. This is Beta 8CX woofers with Celestion CDX1-1446 compression drivers. The actual drivers I will use are B-stock Volt woofers from DIYSG. To keep things clean, I grabbed some "Classix II" crossover PCBs from eBay. It was a little tough to find crossover PCBs that included a tweeter L-pad.
1 - 20 of 47 Posts
