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2.5 WAY W/SUB using 2 KABD
Hello. I'm the new guy and already have a question. I was pointed towards these forums because I was told there were a couple of ppl that were good with these boards so hopefully they can help. I have a MTM setup plus a sub. Previously I built the speakers with passive crossovers in a 2.5 way config but could never quite get it where I wanted it. This setup had my sub on its own monoblock amp. I now have 2 KABD 4100s and I'm in very new territory with these amps and DSP. After a lot of messing around I actually have the speakers sounding better than they ever have but the sub is somewhat lacking. I have it bridged and connected to J13 with J14 free but only as a woofer. My question is, what can I do to this setup to get more out of my sub. It used to rattle windows now it barely gives me anything. Can I somehow rig one of these boards to create a sub out? Should I be using J14 or both maybe? Is there anything I need to do in Sigma to make the woofer into subwoofer? If so, what? I dont have the expertise to create my own setup so for now, I'm modifying pre existing setups provided by Dayton. I can provide my present setup if needed. Thanks for reading
Comments
So many questions, so few details! So, let’s first take a few steps back and get some needed information.
Which Dayton project are you using? I see three 2.1 projects. I assume you have a DSP programmer board and have used it to modify the SigmaStudio project.
Do you want to use pots to control volume? The “Simple 2.1 EQ Project” uses one pot to control master volume and another pot to independently control the sub. In other projects pots are used as tone controls and select crossover points. You can delete these controls, e.g. delete the master volume control and let your source control the volume.
Have you thoroughly read and understand the user manual? The most important part is understanding how the J13 and J14 wiring determines if the outputs are stereo or mono. If you use the “Simple 2.1 EQ Project” J14 would be wired as stereo and J13 as mono.
A few notes:
None of the example 2.1 projects have a crossover for your MTM speakers. In the “Simple 2.1 EQ Project” you’d need to replace the “J14 PEQ” with a 2-way crossover.
For a single sub system one board will drive the sub and the other board’s sub output will be unused.
The Dayton KABD-4100 is the same as the Sure/Wondom JAB5. You can find Youtube videos about the JAB5 from Wondom (LINK).
Expect to spend some time learning SigmaStudio. A good place to start is their Wiki (LINK).
Good luck!
Thank you for taking the time to respond. I'll answer in the order asked
1. At present time I am using the 3 way via cascaded setup after not having much luck with the 2.1since, as you stated, there is no crossover support. I also like the idea of handling each driver or in my case the Tweeter and 2 woofers separately..
2. The pots are not overly important other than main volume. I use a mini PC as my AVR and have Peace Eq installed on it that I run all my music through. So, individual pots to adjust bass and/or treble gains isnt needed since Peace has all of that
3. I have a basic understanding of what the user manual says. Unfortunately, I find the user manual lacking in how to do some things. Its possible that I am lacking in comprehension. I'm more of a youtube guy. If I watch it get done, I understand it
I thought I had read somewhere that the JAB5 wondom was the same. I just wasnt sure how much Dayton had deviated from that design. I was looking at both the JAB5 and something similar from Tinysine
I do have the programmer and have a modified config of the 3 way setup mentioned above downloaded. I just havent had any luck getting it to push my sub the way I want it yet. I guess I was taking the easy way out with trying to hook my monoblock back up to it. Currently the woofers are wired in parallel and each parallel circuit has its own channel as do the tweeters. That takes up the 4 channels on the first board. The 2nd slave board just has the sub bridged with the jumper wires for mono/stereo not connected to one another using J13 with J14 empty. This is just configured as a woofer channel. I'm still unsure how to configure it as a subwoofer channel if that will help
I have considered building another sub but the one I have now...a 12" in a true (within 2 cms) quarter wave TL and it never fails to put a smile on my face when it comes to hitting them low sub 30Hz frequencies. I've never heard anything like it but it's big and I dont have room for its twin.
I believe I will go to Sigmas wiki and try to figure this out. I'd really like to break away from the premade setups and just create something for the 2nd board but any advice you can impart would be welcomed and appreciated
>
Thank you for taking the time to respond. I'll answer in the order asked
1. At present time I am using the 3 way via cascaded setup after not having much luck with the 2.1since, as you stated, there is no crossover support. I also like the idea of handling each driver or in my case the Tweeter and 2 woofers separately..
2. The pots are not overly important other than main volume. I use a mini PC as my AVR and have Peace Eq installed on it that I run all my music through. So, individual pots to adjust bass and/or treble gains isnt needed since Peace has all of that
3. I have a basic understanding of what the user manual says. Unfortunately, I find the user manual lacking in how to do some things. Its possible that I am lacking in comprehension. I'm more of a youtube guy. If I watch it get done, I understand it
I thought I had read somewhere that the JAB5 wondom was the same. I just wasnt sure how much Dayton had deviated from that design. I was looking at both the JAB5 and something similar from Tinysine
I do have the programmer and have a modified config of the 3 way setup mentioned above downloaded. I just havent had any luck getting it to push my sub the way I want it yet. I guess I was taking the easy way out with trying to hook my monoblock back up to it. Currently the woofers are wired in parallel and each parallel circuit has its own channel as do the tweeters. That takes up the 4 channels on the first board. The 2nd slave board just has the sub bridged with the jumper wires for mono/stereo not connected to one another using J13 with J14 empty. This is just configured as a woofer channel. I'm still unsure how to configure it as a subwoofer channel if that will help
I have considered building another sub but the one I have now...a 12" in a true (within 2 cms) quarter wave TL and it never fails to put a smile on my face when it comes to hitting them low sub 30Hz frequencies. I've never heard anything like it but it's big and I dont have room for its twin.
I believe I will go to Sigmas wiki and try to figure this out. I'd really like to break away from the premade setups and just create something for the 2nd board but any advice you can impart would be welcomed and appreciated
OK, I have a basic idea of what you're doing now, one board (the master) to drive both L&R for the two MTMs and one board (the slave) to drive just the sub. I assume you have the cable for the I2S lines between the 2 boards installed and you're getting at least some output from the sub. Right?
One problem with the slave (i.e. sub) project: It's using only the right channel so you need to modify the "input" control to use both I2S channels and mix them together. I'd also add a volume control for that board to control the sub volume independently. If you want, I could create modified versions of both projects for you to start with.