3 ohm DVC XXX 15??? i think RE made a DOH!!

[BassAddictJ 5,000+ posts]

wellll.... here's the background: bought a used xxx15, had it reconed, 2 months later the dustcap begins to come off so i have i reconed again.... 2 months later (now) i notice something odd....

while messing with my crossover and figit fiddling with my stereo as ussual i decide to to an ohm test on my sub for shits and giggles and loan behold it's reading 1.5 ohms..... but i thought i have a 2 ohm DVC xxx15?? i figure maybe some of the wire i was useing to wire the voice in parallel might have gone bad since they are kind of old....so i take the sub out and do an ohm test on each coil...each one reads 2.9ohms (well it tinkers between 2.9ohms and 3.0ohms but still.)..........?

i thought maybe my meter is broken.....i take the sub to 3 radio shacks, an advanced auto parts, an autozone, and a best buy to have them use thier multimeters on my sub and see what i get

all of them read 3ohms on each coil exept for one radio shack which the meter was busted, and best buy where they read 11 ohms on each coil....though the best buy guys were being total douches and slandering my "off brand" sub and i didnt bother to check and see is thier meter was working correctly by haveing them hook it up to something else.... perhaps they purposely used a bad meter sicne i didnt buy somethign from them...? i dont know.

i thought maybe the sub is blown? but for one i have be VERY VERY conservative with my gains and there's no voice coil rubbage when i press down on the cone...and if they coils were blown isnt it a little bit odd they both read the exact same and and 3 ohms a piece?

but my meter along with 2 radio shack and the 2 car parts place all read me at 3 ohms per coil.....is it possible when RE reconed my sub they accidentally gave me dual 3 ohm VC's instead of 2ohms?? i hooked the sub back up and it still hits fine... the sub it'self works flawlessly but i do loose power haveing it at 1.5ohm and not 1 ohm considering impedience rise and power effiency of the amp.... i really really want a normal XXX dual 2ohm but i'm not about to spend another 120 just in shipping for that... though RE has an authorized dealer now an hour from my college (only RE dealer in FL)....

well it's 2:03am sunday night/monday mourning and i was goign to wait till after i talked to ave or scott at RE before i posted this but i had to get this off my chest before i went to bed.... i'll keep u guys posted on what happens after i call RE...

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[JimJ 5,000+ posts]

^^^

Take his advice...

A 3 ohm DCR will be called a 4 ohm "nominal" load, because the actual impedance of the speaker is going to change with cone position (and frequency in box).

Don't worry.

 

[BassAddictJ 5,000+ posts]

sooo it's more or less supposed to be a dual 4ohm? weird....

i just woke up and now calling Re to talk to them before class.....

 

[btnhfan 5,000+ posts]

Dont worry everything is fine.

Thats the dcr of the coils.

For example, if you go and measure hte coils on a dual 2 ohm sx, you will get 2.4.

 

[squeak9798 5,000+ posts]

For example, if you go and measure hte coils on a dual 2 ohm sx, you will get 2.4.

RE is the only company I know of that has a DCR higher than the drivers nominal impedance.

Likewise, they are one of the few using the 1/2 surround method for Sd rather than the 1/3 surround method :shrug:

 

[NDMstang65 10+ year member]

It is alot easier to use 2 coils then it is to use say...8 different coils for different loads...

Get a couple quads made and have any sort of wiring option you need for todays amps (Dual 1.5's are quad .7's....essentially dual 2's that parallel down into a 1ohm nominal load....which is effectively .7ohm dcr)...

Just a whole lot easier, and cheaper to use 2-4 coils vs. 25-30 coils...

 

[bamaboy 5,000+ posts]

i thought something was wrong with mine too //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

each coil reads 2.5/2.6 and 1.5 together in paralell(sp?)

 

[BassAddictJ 5,000+ posts]

weird.....ya talked to mark at RE and the only thing i can do is pay to have it it reconned if i want dual 2's...... which im not even going to bother doing..... talked to him about the new XXX's and he says hopefulyl by november they are avalable to us and that they've been workign on this driver for 3 years now...yikes....... either way....im getting a new car soon and i dunno if my 15 is going to fit in my 2002 vw gold hatchback....i might wanna downgrade to a 12.....im gonna put a feeler up for my xxx in the classified since they are seling like hotcakes now....

 

[InhumanAcura 5,000+ posts]

RE is the only company I know of that has a DCR higher than the drivers nominal impedance.

the dual 4, is a dual 2.8iirc..

 

[NDMstang65 10+ year member]

yerp, because that is the quad 1.4 coil iirc //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[BassAddictJ 5,000+ posts]

well thats cool i guess...i have a dual 4 ohm xxx.......

 

[ngsm13 5,000+ posts]

My 18XXX dual 2ohm DCR'd at 1.9 ohms. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif//content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

NG

 

[BassAddictJ 5,000+ posts]

rr thats what i wanted...o well...amp will still give a good 1400-1500w at 1.5-2ohms.....

 

[bonesninja 5,000+ posts]

My 18XXX dual 2ohm DCR'd at 1.9 ohms. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif//content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif
NG

my 15" XXX also reads 1.9 per coil.