Which is better for a DBA (Swarm); powered subs or unpowered?


I want to start building a swarm (starting with 2 subs), on a budget.  Starting with $1000, am I better off buying two used powered subs, three less expensive used powered subs, or a subwoofer amp (eg Dayton SA1000) and two (less expensive) used unpowered subs?  What is the advantage of having a discrete subwoofer amp?  Room size is 13'x22'. 
128x128cheeg

Showing 1 response by avanti1960

Hi cheeg, 
let me relay my subwoofer experience to you and a recommendation to use your $1K wisely. 

I have successfully and seamlessly tuned subwoofers in my car and home systems.  
I started out with one decent sub at home and it worked really well and two worked slightly better and was very successful. 
If you want the best bang for your dollar (2) Rythmik L12 ($559 each, shipped) will sound excellent.  Someone I know has this setup and it is impressive in a high end 2-channel setup. 
Second best would be (2) SVS SB1000 subs.  

Start by placing them just to the outside of each speaker slightly away from the corner and back wall. you can adjust position once you have broken them in.  

"tune" one sub at a time- tune the right sub to your system noting the best crossover that blends and doesn't cause any peaks or notes that are too loud.  Then adjust the phase by "timing" it to your main speakers.  Play some repetitive bass beats and adjust the phase for the most focused, most powerful notes.  Adjust level to blend.  
With the first sub playing (as a system) add the second sub to the "system" and repeat the steps for crossover, phase and level.  
Now run with this for several weeks and adjust only the level of each sub.   Take notes and write down all of your settings and when you make adjustments in the future.  
After that the subs will be worn in and likely sound louder and slightly different.  Adjust as needed to make the sound smooth.  
This has worked very well for me.  
peace and good luck