Reply to thread

Message

<blockquote data-quote="Warbleed" data-source="post: 801575" data-attributes="member: 549898">Too many want to replicate concert-like bass levels without concert-like high frequency levels. They think the bass should &quot;thump them in the chest.&quot;I agree most people, in car audio especially, set very unrealistic bass levels. It&#039;s not uncommon to see people with a sub system playing 20dB+ louder than the front stage. Now to anyone who actually LIKES accurate reproduction, that sounds god awful. I won&#039;t even listen to a stereo that sounds like that. I have sat it countless cars and immediately tried to persuade them to disable any and all boost, and to reduce the subwoofer level to a more realistic setting.There&#039;s nothing wrong with some slight emphasis in the bass range, but when you get the sub level too much higher, then you aren&#039;t even producing the recording accurately anymore.No one has ever said that XBL^2 or other flat BL topologies are the ONLY way for a driver to sound good, but it is definitely true that flat BL = MUCH lower distortion vs. a traditional motor with a parabolic BL curve. That&#039;s just the unavoidable consequences of physics. Constant motor force is better than changing motor force, period, as far as accurate reproduction is concerned.Stephen referred to Scanspeak and Seas. Scanspeak&#039;s Revelator, as well as Seas&#039; Excel, both have very sophisticated, but still somewhat standard motors. They both have pretty parabolic BL curves, but they have fairly flat Cms curves, and a very low inductance. Those, unsuprisingly, are the three biggest contributors to distortion. Having a flat BL curve makes the largest difference, but if we are comparing drivers with the same topologies, the drivers with higher displacement coupled with low inductance and flat Cms curves are going to be the most accurate midranges. That&#039;s just the way it works out. If the Seas and Scanspeak drivers had flat BL curves, they&#039;d be even better.</blockquote>

[QUOTE="Warbleed, post: 801575, member: 549898"] Too many want to replicate concert-like bass levels without concert-like high frequency levels. They think the bass should "thump them in the chest." I agree most people, in car audio especially, set very unrealistic bass levels. It's not uncommon to see people with a sub system playing 20dB+ louder than the front stage. Now to anyone who actually LIKES accurate reproduction, that sounds god awful. I won't even listen to a stereo that sounds like that. I have sat it countless cars and immediately tried to persuade them to disable any and all boost, and to reduce the subwoofer level to a more realistic setting. There's nothing wrong with some slight emphasis in the bass range, but when you get the sub level too much higher, then you aren't even producing the recording accurately anymore. No one has ever said that XBL^2 or other flat BL topologies are the ONLY way for a driver to sound good, but it is definitely true that flat BL = MUCH lower distortion vs. a traditional motor with a parabolic BL curve. That's just the unavoidable consequences of physics. Constant motor force is better than changing motor force, period, as far as accurate reproduction is concerned. Stephen referred to Scanspeak and Seas. Scanspeak's Revelator, as well as Seas' Excel, both have very sophisticated, but still somewhat standard motors. They both have pretty parabolic BL curves, but they have fairly flat Cms curves, and a very low inductance. Those, unsuprisingly, are the three biggest contributors to distortion. Having a flat BL curve makes the largest difference, but if we are comparing drivers with the same topologies, the drivers with higher displacement coupled with low inductance and flat Cms curves are going to be the most accurate midranges. That's just the way it works out. If the Seas and Scanspeak drivers had flat BL curves, they'd be even better. [/QUOTE]

Verification