Changing reflected impedance
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=84545
Printed Date: May 12, 2024 at 5:00 AM
Topic: Changing reflected impedance
Posted By: psypathic
Subject: Changing reflected impedance
Date Posted: October 24, 2006 at 3:29 AM
How would I make an amp see a 1 ohm load with 2, 4 ohm subs. I know people who do it with resistors in loudspraker designs with constant impedance networks but those networks only have 250-300 watts going through them. I'll be pushing about 3000. How do you do it and is it recommended.
Replies:
Posted By: i am an idiot
Date Posted: October 24, 2006 at 3:56 AM
Get 2 more subs or replace the 2 you have with Dual Voice Coil 4Ohm
Posted By: psypathic
Date Posted: October 24, 2006 at 4:01 AM
I was trying to avoid an upgrade.
Posted By: Aruman
Date Posted: October 24, 2006 at 4:28 AM
like i am an idiot said, get 2 more subs or change the one that's cheaper the Amp or the 2 subs.
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Shaking The Neighborhood
Posted By: haemphyst
Date Posted: October 24, 2006 at 2:38 PM
If your amp is a stereo amp, bridging it WILL present one ohm to it. (Bridging into 2 ohms is the same as one ohm per channel.)
As your amplifier information was not provided, I can't tell you whether this will be the case.
Also, why do you feel you MUST drop your amplifier's load to one ohm? Even if you have a mono amp, and the only load you can acheive is two ohms, two ohms will be LESS THAN 3dB difference in output than a one ohm load. Run it at 2 ohms, and be done. Your amp will run cleaner, cooler, and last longer.
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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: jeffchilcott
Date Posted: October 24, 2006 at 3:11 PM
Can I ask exaclty what you will be achieveing 3000 watts with? What type of alt? how many batteries? 2 runs or 1/0?
What amp or Amps? and to what speakers?
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