Subwoofer pre-amp resistance and hook-up
Pineapple
Posts: 2
Hay guise,
I have a student budget 2.1 speaker set up and my subwoofer makes a little rattling/rasping sound. I checked the voice coil and stuff and found no obvious reason. So I started wondering if it was because of my "I don't know this stuff, but I'll just connect this here and that there" -style set up.
I have a 8ohm subwoofer speaker, which is passive and self made. It is connected to a 4ohm subwoofer preamp, which is actually my old instrumental bass amp. This shouldn't be a problem as long as I don't run it too loud, right? Anyways, the previous is connected to a 8ohm main amplifier and I think this could be bad.
I wish someone could shed some light to this. Is it bad to have a lower resistance preamp than main amp and could this cause subwoofer rattle? Wiring could cause the rattle also, right?
I have a student budget 2.1 speaker set up and my subwoofer makes a little rattling/rasping sound. I checked the voice coil and stuff and found no obvious reason. So I started wondering if it was because of my "I don't know this stuff, but I'll just connect this here and that there" -style set up.
I have a 8ohm subwoofer speaker, which is passive and self made. It is connected to a 4ohm subwoofer preamp, which is actually my old instrumental bass amp. This shouldn't be a problem as long as I don't run it too loud, right? Anyways, the previous is connected to a 8ohm main amplifier and I think this could be bad.
I wish someone could shed some light to this. Is it bad to have a lower resistance preamp than main amp and could this cause subwoofer rattle? Wiring could cause the rattle also, right?
Post edited by Pineapple on
Comments
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Specifically what equipment are you using, and what order is it connected in? This will help us analyze your set-up.
The output impedance of the preamp would not effect the impedance of the passive subwoofer; however running an amplifier at a low impedance than it's rated is bad. -
Thanks for answering!
Main amplifier: JVC RX-5052S (http://resources.jvc.com/Resources/00/01/00/LVT1290-001A.pdf).
Subwoofer amp: instrumental GK Backline 600 (http://www.gallien.com/products_bl_series.html).
Subwoofer: Peavey Black Widow 1502DT ohm. http://www.peavey.com/support/technotes/misc/blackwidow.cfm).
I know it's very random. And uhm the connection order would be from main amp subwoofer out to pre-amp plug input and from pre-amp speaker output to the subwoofer. Most likely the rattle is caused by the speaker being so old and somehow broken, but I also wanted to make sure I wouldn't break my amplifiers (especially the GK amp) with my set up.
