E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > Tuning & Tech > Bavarian Soundwerks' Mobile Electronics Forum

Bavarian Soundwerks' Mobile Electronics Forum
Have all your A/V and electronics questions answered here. Ipods, A/V, Radar Detectors Oh My!
Sponsored by Bavarian Soundwerks

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 03-06-2003, 08:33 PM   #1
DKJBama330ci
Registered User
 
Join Date: Dec 1969
Posts: 2
Send a message via AIM to DKJBama330ci
Sub Wiring question...can i get away with 1.5 ohms

Hey guys, here's my dilemna.

I'm thinking of buying a JBL w12GTi Sub. It is only available with dual 6 ohm voice coils. I already have a US ACoustics 2150 amp. The porblem is that to get decent power out of the amp i would have to run the voice coils in parallel, which would give me 3 ohms of impedance. If i bridged the amp it would then see a 1.5 ohm load. It is only rated down to 2 ohms. I'm not really worried about frying the amp because i won't be pushing it very hard and it is an old amp anyway. My concern is that the auto-protect cicuit will kick in because the amp thinks the low impedance is actually a short across the speaker terminals.

So, in short, will my amp even power up with a 1.5 ohm load, or am i wasting my time.

BTW, I originally went looking for a Kicker Solo-Baric 12L7 but the guy at the shop is giving me a heck of a deal on this sub. MSRP is $599(I checked it on JBL's website) and he is selling it to me for $418.40 with a box.

Thanks,
DKJ
DKJBama330ci is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 03-07-2003, 06:37 AM   #2
BMOBSESSION
Registered User
 
Join Date: Mar 2003
Location: UK
Posts: 9
My Ride: 330 CI Sport Conv
HI,

It is not a good idea to run the amp with this degree of impeadance mis-match. - See if your dealer can provide you with an impeadance transformer/x over to solve the problem. As you say, the amp may shut down due to overload protection.. In addition, sound quality may also be affected as the audio signal (output from amp) phasing will also get shifted causing a non-faithful sound reproduction - whether you can hear the shift is anybody's guess...

Hope this helps .
BMOBSESSION is offline   Reply With Quote
Old 03-07-2003, 02:01 PM   #3
MCD007
Im The Man
 
Join Date: Dec 1969
Location: Sunnyvale, CA
Posts: 1,191
My Ride: 325ci
Send a message via AIM to MCD007
If you run at moderate volume youll be ok.
__________________
MCD007 is offline   Reply With Quote
Old 03-07-2003, 02:25 PM   #4
DKJBama330ci
Registered User
 
Join Date: Dec 1969
Posts: 2
Send a message via AIM to DKJBama330ci
Thanks for the opinions guys. I think i'm just going to take the amp in to the stereo shop and have the guy hook it up on the test bench to see if it works before i commit to buying.

BTW, have any of yall heard one of these subs. He didn't have a test model set up because its such an expensive sub. Any good/bad feedback is greatly appreciated.

Thanks for your quick responses comsidering my low post count. I usually just lurk here, but i post some over at the 'fest.

Thanks again,
DKJ
DKJBama330ci is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Censor is ON





All times are GMT -5. The time now is 09:00 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
(c) 1999 - 2011 performanceIX Inc - privacy policy - terms of use