dropping the ohm load
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=84488
Printed Date: May 15, 2025 at 6:54 PM
Topic: dropping the ohm load
Posted By: killer sonata
Subject: dropping the ohm load
Date Posted: October 22, 2006 at 11:27 PM
I want to get some speakers for my door as dedicated midbass but they are rated at 8ohms. Is there a way I can put a resistor inline to drop it to 4ohm without effecting the RMS actually reaching the speaker?
Replies:
Posted By: DYohn
Date Posted: October 23, 2006 at 8:23 AM
No. Just use the proper size amp for the speakers. ------------- Support the12volt.com
Posted By: haemphyst
Date Posted: October 23, 2006 at 9:49 AM
That, and what's wrong with running 8 ohms on your amplifier?
People seem to think that you MUST load an amplifier with it's rated impedance, in order to feel good about their purchase, or something like that. Just run the 8 ohm drivers, and be happy! THD will be lower, as will heat, the amp will last longer, the damping will be higher... The ONLY thing you will be missing is power, but if you have an efficient driver, you'll never actually "miss" it.
I run 6 and 8 ohm loads all day long, and there are no problems with that...
-------------
It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
Posted By: killer sonata
Date Posted: October 25, 2006 at 8:23 PM
because the speakers are rated for 200RMS at 8ohms. id have to get a huge 2ch to get them even close to sufficient power at 8ohms.
Posted By: haemphyst
Date Posted: October 25, 2006 at 10:13 PM
What kind of speakers are they, and what amp are you considering (or already have)?
-------------
It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
Posted By: killer sonata
Date Posted: October 25, 2006 at 10:17 PM
https://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=297-078 those speakers - one to each of 2 channels on an eclipse XA4000 (125rms x 4)
Posted By: haemphyst
Date Posted: October 25, 2006 at 10:32 PM
That amp'll make about 80 to 90 wpc @ 8 ohms. Those woofers'll be happy with that. What about bridging the amp to two channels? 250 watts each woofer? Would that be enough for you?
Run the amp in "tri-mode"...
-------------
It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
Posted By: killer sonata
Date Posted: October 25, 2006 at 10:41 PM
good idea but not an option. the front 2 channels are powering my focal polyglass 3way comps.
|