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separate the chambers or not?


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bigmikeww 
Copper - Posts: 75
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Joined: January 26, 2003
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Posted: August 23, 2004 at 11:27 AM / IP Logged  
separate or not to separate when making an dual enclosure? I have heard always separate them, but also a few times that it really doesn't matter? which one and why?
CarAudioHelp 
Copper - Posts: 198
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Joined: July 18, 2003
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Posted: August 23, 2004 at 1:25 PM / IP Logged  
Separate if you're running the woofers in stereo (not mono). Usually you'll be running the woofers in mono though. In that case it technically doesn't matter as long as the woofers are identical models. On the other hand the divider does act as a brace which may be needed on larger spans. Also, if one of the woofers blows you can tell which one. Otherwise the working woofers will continue to push the blown woofer like a passive radiator, giving it the appearance that it is still working.
dangerranger96 
Copper - Posts: 163
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Posted: August 23, 2004 at 3:30 PM / IP Logged  
plus after one of the woofers blow, you will be playing one woofer in a much larger box because it is only for one working woofer and it could very easily damage the other woofer too if your playing it at high volumes.  If you put in a seperator, you wont have to worry about that happening
rknj01 
Copper - Posts: 59
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Posted: August 27, 2004 at 3:00 PM / IP Logged  
im doing an enclosure for 3 10's. im running it in mono, but heres my question. 2 of the subs are 4ohm and one is 8ohm( i did that so i could wire it to 4ohms for my amp) is it going to be bad if its one chamber?
auex 
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Posted: August 27, 2004 at 3:56 PM / IP Logged  
You shouldn't mix subs of different resistances.
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RockinF150 
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Posted: August 27, 2004 at 4:09 PM / IP Logged  
What auex said. That 8 ohm is gonna get 1/2 the power the 4 ohms do. Bad design.
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dangerranger96 
Copper - Posts: 163
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Posted: August 27, 2004 at 8:16 PM / IP Logged  
definite no-no mixing subs of different resistances especially on one amp
HottAccord 
Silver - Posts: 247
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Posted: August 30, 2004 at 12:28 AM / IP Logged  
I would also say seperate them for all of the reasons already mentioned (bracing, blowing woofers, different impediences).  3 woofers in 1 huge box sounds like a problem waiting to happen, especially using 1 8 ohm sub in the mix.
wunch 
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Posted: August 30, 2004 at 10:12 PM / IP Logged  
No disagreement here but a correction on a previous statement. That 8 ohm is gonna get 1/2 the power the 4 ohms do. Bad design. This is most likely incorrect. If rknj01 is going for a 4 ohm load then the 2 4 ohm speakers would be wired in series and then that pair would be wired in paralel for a 4 ohm load. Thus if you assume 100 watts to a 4 ohm load then 50 watts would go to the 8 ohm speaker and 25 watts would go to each of the 4 ohm speakers. Thus, the 8 ohm would actually be getting twice the power of either of the 4s.
RockinF150 
Member - Posts: 7
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Joined: January 24, 2004
Posted: August 31, 2004 at 9:20 PM / IP Logged  

Only if you wire the 4 ohms in series. Can't imagine why anyone would wire an amp like that. Wire the 4 and 8 in parallel and the other 4 in series and you get a healthy 6.66 ohm (3.33 bridged) load for your amp. But for a 4 ohm load in mono you are right, you'd have to wire it like you say. No wiring arrangement is ever going to fix the mixed impedence problem, though. The 8 will always be the odd driver out. 

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