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<blockquote data-quote="Langston Holland" data-source="post: 51388" data-attributes="member: 171">Re: Effect of a change in gain to subs?Hi Loren:Three things come to mind as probable contributions to your subjective observation:1. The lower the SPL, the higher the LF haystack required to achieve a given <a href="http://www.sengpielaudio.com/Acoustics226-2003.pdf" target="_blank">perceived tonal distribution</a>.2. Reduction in limiter engagement. The harder you drive the subs into the limiters, the more compressed that portion of the spectrum is, thus the higher the RMS and perceived volume.3. Higher levels of distortion at identical SPL&#039;s sound louder. Some studies have shown that a 10% increase in distortion (very easy to achieve with loudspeakers) can result in apparent SPL increases of 10dB. Distortion ramps up very quickly when approaching the maximum output of either an amplifier or loudspeaker. Backing off 3dB can clean up the distortion markedly.JR is right. A dB is a dB. Living in that world removes many opportunities for confusion.</blockquote>

[QUOTE="Langston Holland, post: 51388, member: 171"] Re: Effect of a change in gain to subs? Hi Loren: Three things come to mind as probable contributions to your subjective observation: 1. The lower the SPL, the higher the LF haystack required to achieve a given [url=http://www.sengpielaudio.com/Acoustics226-2003.pdf]perceived tonal distribution[/url]. 2. Reduction in limiter engagement. The harder you drive the subs into the limiters, the more compressed that portion of the spectrum is, thus the higher the RMS and perceived volume. 3. Higher levels of distortion at identical SPL's sound louder. Some studies have shown that a 10% increase in distortion (very easy to achieve with loudspeakers) can result in apparent SPL increases of 10dB. Distortion ramps up very quickly when approaching the maximum output of either an amplifier or loudspeaker. Backing off 3dB can clean up the distortion markedly. JR is right. A dB is a dB. Living in that world removes many opportunities for confusion. [/QUOTE]

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