[Autobot]

I just talked to the guy here who I put an order in with a few days ago and the 4 ohm get in early next week, but he just got some 2 Ohm ones in today. Wanted to pass along to those of you who are looking into getting these.

http://www.caraudiocraze.com/subwoof.../prod_762.html

I know it says they are on backorder, but give him a call.

Question thought, what difference is there between the 2 and 4 Ohm, if they will be powered by a different amp? Anything?

[imaznumkay]

Originally Posted by Autobot

I just talked to the guy here who I put an order in with a few days ago and the 4 ohm get in early next week, but he just got some 2 Ohm ones in today. Wanted to pass along to those of you who are looking into getting these.

http://www.caraudiocraze.com/subwoof.../prod_762.html

I know it says they are on backorder, but give him a call.

Question thought, what difference is there between the 2 and 4 Ohm, if they will be powered by a different amp? Anything?

from what i know,
4 ohm + 4 ohm (in parellel) = 2 ohm for the amp

thats all i know though,
maybe Technic can chime in on this?

[Autobot]

But if they are not run in parallel or with each sub having its own channel then the 2 vs 4 Ohm wouldn't matter, would it?

[Technic]

Originally Posted by Autobot

I just talked to the guy here who I put an order in with a few days ago and the 4 ohm get in early next week, but he just got some 2 Ohm ones in today. Wanted to pass along to those of you who are looking into getting these.

http://www.caraudiocraze.com/subwoof.../prod_762.html

I know it says they are on backorder, but give him a call.

Question thought, what difference is there between the 2 and 4 Ohm, if they will be powered by a different amp? Anything?

Other than having half the impedance, we can't say anything else for sure about the differences between the 2 ohm and the 4 ohm versions because the specs are not out yet. Technically, it could be possible to drive these subs with double the power of the 4 ohm versions, but again that doesn't have to be case.

Remember, according to the Earthquake people, this 2 ohm version was made to match the base OEM system subs impedance as a drop in replacement therefore it does not have to have double the power rating of the 4 ohms. Especially when the base OEM amp has way less power to supply to these 2 ohm subs than the Top HiFi amp to the 4 ohms subs.

[03SMGM3]

Hey all,
I am "that guy" that Colin has talked to from CarAudioCraze.com I figured id stop in and answer a few questions and shed some insight. I didnt realize the Earthquake was a direct fit into the E90's as im oldschool with my E46. Anyway like he said we got in the 2-ohm version on Friday and those we can ship out either Monday or Tuesday at the very latest and the 4-ohm versions are coming later this week sometime.

As for the difference in Ohms, it does matter. Im not sure of stock system but if you are hooking them up to an after-market amplifier it does matter. Ohms are resistance and so depending on the amp it will determine the power the sub woofer receives. In Colin's case he has an Alpine PDX amplifier which puts out the same power at ANY resistance so it doesnt matter for him, however most amps ARE NOT like this. However since the subwoofer isnt a dual voice coil sub it cannot be wired down to 1 ohm unless in parallel with another subwoofer. Likewise a 4ohm can only be wired down to 2 ohms if in parallel with another woofer.

If you guys have any other questions feel free to contact me personally at my email: trenier09@gmail.com (this goes to my blackberry, so expect a pretty fast response)

ALSO: e90post.com users can now recieve 8% off your order total with the coupon code "E90Post"

(random percent but its the max i could do for you guys!)

[Autobot]

Hey good to see you in here, sorry I didn't remember your name.

So should I wire these in Parallel or not? Thanks

[03SMGM3]

Originally Posted by Autobot

Hey good to see you in here, sorry I didn't remember your name.

So should I wire these in Parallel or not? Thanks

Dont worry about it, i didnt mean that quote in a menacing way! No worries!

Anyway no you dont need to. You can just wire them separately at the normal 2-ohms to your PDX.

-Trent
CarAudioCraze.com

[azwillnj]

2 things:

first, do you have any detailed specs of the new 2ohm subs?

second, im still not sure which one to get, I want to use the 300.2 earthquake amp.. http://www.earthquakesound.com/xtreme.htm Which one would you recommend for the most increase in bass? the 2 or the 4 ohm version?

Thanks,
Alex.

[Lane]

+1 on getting the specs of the 2-ohm subs

[03SMGM3]

Originally Posted by azwillnj

2 things:

first, do you have any detailed specs of the new 2ohm subs?

second, im still not sure which one to get, I want to use the 300.2 earthquake amp.. http://www.earthquakesound.com/xtreme.htm Which one would you recommend for the most increase in bass? the 2 or the 4 ohm version?

Thanks,
Alex.

To my knowledge, they should be the same as the 4-ohm. I haven't physically held them to look at the box since they are in the warehouse and flying off te shelves. Colin should be able to let us know when he gets his in a few days but im 80% sure they are the same specs as the 4-ohm.

As for that amp, id go with the 4-ohm subwoofers. As you know, the sws-8's have a max load of 300W and the RMS of that amplifier at 2ohms to 2 subwoofers is 250W. Usually, you want to give the subs half of their max. So the 130W x 2 subs at 4-ohms would be the better choice.

Hope that helps!

-Trent

[Autobot]

Mine should be delivered today, when they get here I will post up the info guys

[azwillnj]

Originally Posted by 03SMGM3

To my knowledge, they should be the same as the 4-ohm. I haven't physically held them to look at the box since they are in the warehouse and flying off te shelves. Colin should be able to let us know when he gets his in a few days but im 80% sure they are the same specs as the 4-ohm.

As for that amp, id go with the 4-ohm subwoofers. As you know, the sws-8's have a max load of 300W and the RMS of that amplifier at 2ohms to 2 subwoofers is 250W. Usually, you want to give the subs half of their max. So the 130W x 2 subs at 4-ohms would be the better choice.

Hope that helps!

-Trent

Damn! I just ordered the 2-ohm ones and that amp.. how would I compensate? Turn down the gain?

Alex.

[azwillnj]

In case anyone was wondering, I called earthquake directly to confirm, and the only difference between the 2-ohm and the 4-ohm is the resistance. The guy also said that the 2-ohm ones have a new voice coil and that should make them a little more powerful, but everything else is the same, dimensions, RMS, max wattage.. all the same.

[03SMGM3]

Thanks for the info Alex, i had a feeling theyd be the same but its good to know for 100% sure!

[03SMGM3]

Colin, care to put your two cents in? Everything get there alright and as described?

[BzsBimmer]

Originally Posted by Technic

Other than having half the impedance, we can't say anything else for sure about the differences between the 2 ohm and the 4 ohm versions because the specs are not out yet. Technically, it could be possible to drive these subs with double the power of the 4 ohm versions, but again that doesn't have to be case.

Remember, according to the Earthquake people, this 2 ohm version was made to match the base OEM system subs impedance as a drop in replacement therefore it does not have to have double the power rating of the 4 ohms. Especially when the base OEM amp has way less power to supply to these 2 ohm subs than the Top HiFi amp to the 4 ohms subs.

So if I wanted just drop in's without buying a new amp, I should get the 2 ohm?
I have Logic 7 system and I'd rather keep the amp stock

[VP Electricity]

Originally Posted by azwillnj

In case anyone was wondering, I called earthquake directly to confirm, and the only difference between the 2-ohm and the 4-ohm is the resistance. The guy also said that the 2-ohm ones have a new voice coil and that should make them a little more powerful, but everything else is the same, dimensions, RMS, max wattage.. all the same.

Sigh... the VC is the same size... but regardless it won't make the subs more powerful.

[Technic]

Originally Posted by BzsBimmer

So if I wanted just drop in's without buying a new amp, I should get the 2 ohm?
I have Logic 7 system and I'd rather keep the amp stock

Originally Posted by Technic

Remember, according to the Earthquake people, this 2 ohm version was made to match the base OEM system subs impedance as a drop in replacement...

Logic7 systems use 4 ohms subs.

[Autobot]

Originally Posted by 03SMGM3

Colin, care to put your two cents in? Everything get there alright and as described?

Yeah, Sorry guys been a bit busy coming off of vacation and back to work. The specs form the box are the same excpt for whats listed above.

I have had mine installed here for a few days and to be honest I am not sure if I am going to hook up the amp. With the way I installed them with Dynamat and the cover back on with the spacers under the carpet, they hit hard enough for me I think, at least enough to shake the rear view mirror on some songs, and a good amount of ass massaging. I have no rattling outside of the cabin either on the side skirts like some were having with these.

Just not sure how much harder they woud hit with the amp

[Lane]

Originally Posted by Autobot

Yeah, Sorry guys been a bit busy coming off of vacation and back to work. The specs form the box are the same excpt for whats listed above.

I have had mine installed here for a few days and to be honest I am not sure if I am going to hook up the amp. With the way I installed them with Dynamat and the cover back on with the spacers under the carpet, they hit hard enough for me I think, at least enough to shake the rear view mirror on some songs, and a good amount of ass massaging. I have no rattling outside of the cabin either on the side skirts like some were having with these.

Just not sure how much harder they woud hit with the amp

So are you running them with the US OEM base head unit at the moment?

[ontopofm]

the spec are the same as the 4 ohm

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Dear

The 2 ohm model has the same power/tech specs as the 4 ohm model (only difference is impedance):

8" Car Subwoofer
300w Peak power
150w RMS Power
Impedance: 2 Ohms
Mounting Depth: 2 1/8"
Cut out Mounting hole= 7 7/8"
Voice coil Diameter: 1.5"
Aluminum bobin
Over 1.5" long throw excursion
Long lasting UV treated high roll compostite foam surround
Weather resistant light weight PVC cone
For Door Mount, Under-seat mount, In-Dash mount or rear deck mount
For car , home & marine bass application
Revc. (ohms): 3.500
Fo. (Hz): 30.394
Sd. (msqM): 22.000
BL. (TM): 6.210
Qms: 3.987
Qes: 0.804
Qts: 0.669
SPLo. (dB): 86.7
Vas (Ltr): 27.830
Xmax (mm): 23


Let us know what you think. Thank you.

[Autobot]

Originally Posted by Lane

So are you running them with the US OEM base head unit at the moment?

That is correct, just tapped the wires from the old subs and left the connecter on there when I get rid of the car so I can put it back to OEM.