I just bought a subwoofer from a thrift store for 60 bucks....its a MTX audio thunder 6000 with a q-logic box....the only thing wrong is I dunno if its 4ohm or 8ohm....how can you tell?....I went to their site to find out but the same model comes with both so is there a way to tell?

 

You will need a multimeter , set to OHMs and a reading of 3.7 or so is a 4ohm and a reading of 7.6 or so is a 8ohm . 94

 

what if I have no way of getting my hands on a mutlimeter?...cause I really don't

 

If its not printed on the sub someplace, I don't know of any other way, try this, take it to a local car audio shop, around back at the install bay, and ask one of the installers if he wouldn't mind testing it for you, getting him a coffee or something can't hurt. 94

 

ok...thank you for the help...really apreticate it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fcm &raquo;</TD></TR><TR><TD CLASS="quote">You will need a multimeter , set to OHMs and a reading of 3.7 or so is a 4ohm and a reading of 7.6 or so is a 8ohm . 94</TD></TR></TABLE>

more like if it reads 5 ohms its a 8 ohm driver. Very few drivers have a DCR thats really close to the "AC" ohms.

 

just take the sub out of the box and look on the bottom

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Westrock2000 &raquo;</TD></TR><TR><TD CLASS="quote">

more like if it reads 5 ohms its a 8 ohm driver. Very few drivers have a DCR thats really close to the "AC" ohms.</TD></TR></TABLE>

Sorry to get off topic but, if this is true what then occurs when two "8 ohm" speakers are on one channel?
I understand that two 8 ohm speakers on one channel will draw power as if it were one 4 ohm speaker.
So, if they really draw closer to 5 what will two channeled together do?
Is this what is causing me problems when I bridge my amp, with both speakers on one channel?
TIA, and again sorry for getting off-topic.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MugenB18 &raquo;</TD></TR><TR><TD CLASS="quote">

Sorry to get off topic but, if this is true what then occurs when two "8 ohm" speakers are on one channel?
I understand that two 8 ohm speakers on one channel will draw power as if it were one 4 ohm speaker.
So, if they really draw closer to 5 what will two channeled together do?
Is this what is causing me problems when I bridge my amp, with both speakers on one channel?
TIA, and again sorry for getting off-topic.</TD></TR></TABLE> When testing a speaker with a DMM,[or a AMM ] all you can read is the elec. imp. of the speaker a 4ohm will read 3.5 +or- an 8ohm will read 7.5 + or -, I don,t agree with the 5ohms I have an 8ohm wired to my fluke now and it reads 7.3ohms. 94