Menu
Forum
What's new
New posts
Live Activity
Search forums
Members
Registered members
Classifieds Member Feedback
Car Audio Discussion
General Car Audio
Car Audio Build Logs
Car Audio Equipment
Subwoofers
Speakers
Amplifiers
Head Units
Car Audio Help
Wiring, Electrical and Installation
Enclosure Design & Construction
Car Audio Classifieds
Car Audio Classifieds
Car Audio Wanted
Classifieds Member Feedback
Gallery
New media
New comments
Search media
SHOP
Shop Head Units
Shop Amplifiers
Shop Speakers
Shop Subwoofers
Shop eBay Car Audio
Log in / Join
Test
Forum
Search
Search titles only
Search titles only
Log in / Join
Search
Search titles only
Search titles only
What's new
New posts
Live Activity
Search forums
Members
Registered members
Classifieds Member Feedback
Menu
Reply to thread
Forum
Car Audio Equipment
Amplifiers
Testing .5ohm
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Message
<blockquote data-quote="hispls" data-source="post: 8418993" data-attributes="member: 614752"><p>A loudspeaker in a box acts like a rather complex circuit.</p><p></p><p><img src="http://www.integracoustics.com/MUG/MUG/articles/woofer/Thiele_equiv_circuit.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>"Box rise" is a really ignorant sounding way to explain the impedance of this circuit changing with frequency. Without the relevant data for someone's particular application you cannot say what impedance an amp will see at any given frequency.</p><p></p><p>I repeat .5 ohm is very strenuous on semiconductors regardless of how many batteries you have and trying to do this with amps is a gamble. We still see amps for sale that are 25 years old and that was in the day they were built well. How many of these Chinese/Korean amps that people are running at</p><p></p><p></p><p>Very few are since most manufacturers know that is very abusive. Even if it's "rated" half ohm is BRUTAL for semiconductors. It's most probable that side by side the 2 ohm version of the same amp run at 2 ohms would far outlast the .5 ohm version. Many companies test their amps there and competitors will do it, but those with any sense won't warranty, or like Crescendo will charge more for the warranty..... Figure they know how many are likely to fail prematurely in that application and charge enough to give away some freebies.</p><p></p><p></p><p>That's the only one I can think of off the top of my head that rates this and would stand behind a warranty. Bear in mind Mmats does their own engineering and R&amp;D. This is NOT just a cookie cutter copy of the same circuit that the Chinese Koreans have been using for every amp for the last 10 years or so and might be a little more reliable. Again, they make 1 or 2 ohm versions of the same size amp so why on Earth would you chose to run .5 ohm which will sound audibly worse and be more stressful on the amp?</p><p></p><p>The days of "cheater" amps that are rated at 4 ohms being run at 1/4 ohm are long gone.</p></blockquote><p></p>
[QUOTE="hispls, post: 8418993, member: 614752"] A loudspeaker in a box acts like a rather complex circuit. [IMG]http://www.integracoustics.com/MUG/MUG/articles/woofer/Thiele_equiv_circuit.gif[/IMG] "Box rise" is a really ignorant sounding way to explain the impedance of this circuit changing with frequency. Without the relevant data for someone's particular application you cannot say what impedance an amp will see at any given frequency. I repeat .5 ohm is very strenuous on semiconductors regardless of how many batteries you have and trying to do this with amps is a gamble. We still see amps for sale that are 25 years old and that was in the day they were built well. How many of these Chinese/Korean amps that people are running at Very few are since most manufacturers know that is very abusive. Even if it's "rated" half ohm is BRUTAL for semiconductors. It's most probable that side by side the 2 ohm version of the same amp run at 2 ohms would far outlast the .5 ohm version. Many companies test their amps there and competitors will do it, but those with any sense won't warranty, or like Crescendo will charge more for the warranty..... Figure they know how many are likely to fail prematurely in that application and charge enough to give away some freebies. That's the only one I can think of off the top of my head that rates this and would stand behind a warranty. Bear in mind Mmats does their own engineering and R&D. This is NOT just a cookie cutter copy of the same circuit that the Chinese Koreans have been using for every amp for the last 10 years or so and might be a little more reliable. Again, they make 1 or 2 ohm versions of the same size amp so why on Earth would you chose to run .5 ohm which will sound audibly worse and be more stressful on the amp? The days of "cheater" amps that are rated at 4 ohms being run at 1/4 ohm are long gone. [/QUOTE]
Insert quotes…
Verification
Post reply
Forum
Car Audio Equipment
Amplifiers
Testing .5ohm
Top
Menu
Home
Refresh