Inverting subs
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Bronze Member Username: SecretsoundzSt. Paul, Mn USA Post Number: 14 Registered: Aug-05 | Does inverting(magnet out)my sub in its box change spl/sq? What purpose does it serve besides looking cool? Also, can someone experienced give me an opinion on ma audio subs, I'm eyeing the ma1200XL. Thanks |
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Silver Member Username: Basshead86Ocala, FL USA Post Number: 606 Registered: Aug-05 | there is not much of a difference. just make sure you reverse the polarity on the amp, by wiring the + and - opposite.(in case you didn't know)  |
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Silver Member Username: Mikechec9Chicago/atlanta Post Number: 757 Registered: May-05 | yeah. but in many cases, even that's not necessary. just listen to both inverted and not and determine which sounds best. particularly though, with multiple subs. the main concern to me with inverting is the sound of the mechanical movements (and potential lead slap) now made more evident by the motor structure being exposed, as opposed to being sealed inside the box.  besides that though, there is absolutely no audible difference. keep in mind though that the space in the box is larger now because of the lack of the baskets' displacement. |
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New member Username: JohntheguyPost Number: 3 Registered: Aug-05 | looks sweet are those yours |
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Gold Member Username: GlasswolfWisteria, Lane USA Post Number: 9419 Registered: Dec-03 | http://www.wickedcases.com/caraudio/inverted.html new one I wrote the other day |
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Silver Member Username: Mikechec9Chicago/atlanta Post Number: 763 Registered: May-05 | yeah. those are my "Brahmharas." Brahma MKII hybrids w/Sadhara Motor structures. i'm gonna keep them like this until next spring, when i'll build an aperiodic enclosure w/1" plexi so i can still view the motor structures. |
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Silver Member Username: Mikechec9Chicago/atlanta Post Number: 764 Registered: May-05 | "yeah. but in many cases, even that's not necessary. just listen to both inverted and not and determine which sounds best. particularly though, with multiple subs." clarification-i was referring to inverting the polarity of your signal, not the subs.  with multiple subs (like these), you can often cause cancellation if you don't reverse the polarity on one pair vs another. even for just two subs, play around with direct/reversed polarity to determine which plays best. (i maintain- listen for mechanical noise with an inverted setup. it may or may not be apparent.) |
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Bronze Member Username: SecretsoundzSt. Paul, Mn USA Post Number: 15 Registered: Aug-05 | Thanks for the info, nice pics mike, My enclosure is tuned to 36hz. Its a custom 2-12 ported box with bare minimum space for the sub displacement. So if I like inverting them, it should lower the tuning? Whatever plays lowest loudest I want. |
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robert d r d r d Unregistered guest | do you wire the power cables in reverse like the ground and the battery cable or just the speaker channels |
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Silver Member Username: CnafetsPost Number: 140 Registered: Aug-05 | Just the speaker cables. |
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Gold Member Username: GlasswolfWisteria, Lane USA Post Number: 9439 Registered: Dec-03 | ooooooh boy |
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Silver Member Username: Mikechec9Chicago/atlanta Post Number: 768 Registered: May-05 | *chuckle* |
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Bronze Member Username: KunitPost Number: 70 Registered: May-05 | uh oh...yea that might invert your amp and send it out through the trunk... |
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Silver Member Username: RovinTrinidad & T... Post Number: 142 Registered: Jul-05 | With a question like that - like somebody had reversed 'his power cables' too ...lol !!!!!!!!! |
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Gold Member Username: InsearchofbassPost Number: 3463 Registered: Jun-04 | Just to make it clear robert or any novice crossing this post...that means dont reverse the power and ground or up in smoke we go. |
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Gold Member Username: InsearchofbassPost Number: 3464 Registered: Jun-04 | (dont)=power and ground on the amp |
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robert d r d r d Unregistered guest | yea i learned from that i just bought a capacitor and i isntalled the wires through it but i accidently hit the possitive terminal with the negitave terminal and now the capacitor wont turn on so i gotta return that and also a voice coil in my audiobahn got so hot it melted the part that it lays on that orange layer under the cone ... and im not over powerin the sub cause my amp is rated at 300 rms x channel but i think its overrated |
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Gold Member Username: GlasswolfWisteria, Lane USA Post Number: 9572 Registered: Dec-03 | 1- pray they take back the capacitor. you damaged it with faulty installation. you should eat that cost, not the store. 2- it's called the spider 3- coil overheated because amplifier is clipping due to lack of current or gain set too high also installer fault |
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Bronze Member Username: FatzBossier City, LA USA Post Number: 16 Registered: Aug-05 | So it's not a speaker preference then, huh? I can mount a woofer both ways and simply decide which I like better? |
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Silver Member Username: Infinity_addictSanta Rosa, California USA Post Number: 128 Registered: Jul-05 | sure thing |
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Gold Member Username: GlasswolfWisteria, Lane USA Post Number: 9588 Registered: Dec-03 | yessir.. as long as you account for the difference in driver displacement. that can be done before building the box, or you can add mass to the interior of the box after inversion to compensate for the missing driver displacement. Either way keeps the same box net volume. |
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