Crossover - Revision history

ST: Crossover with Line Out

2018-06-28T04:41:45Z

Crossover with Line Out

← Older revision		Revision as of 04:41, 28 June 2018
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	The first statement is not particularly bothersome. Your auditory system is well calibrated to that. A voice sounds normal because it sounds like what you are used to, not because it has “constant sound energy” or “constant perceived loudness” with frequency.		The first statement is not particularly bothersome. Your auditory system is well calibrated to that. A voice sounds normal because it sounds like what you are used to, not because it has “constant sound energy” or “constant perceived loudness” with frequency.

	The second statement is much more trouble. It basically says that if you amplify an acoustic source (even if you do it perfectly), the perceived spectral balance will change. This is a well known effect, and most of our home entertainment systems have actually and “automatic loudness compensation” that changes the system voicing with overall level. We actually contemplated adding this to the Personalized Amplification System™ but after some soul searching we thought it would be too intrusive on the musician.		The second statement is much more trouble. It basically says that if you amplify an acoustic source (even if you do it perfectly), the perceived spectral balance will change. This is a well-known effect, and most of our home entertainment systems have actually and “automatic loudness compensation” that changes the system voicing with overall level. We actually contemplated adding this to the Personalized Amplification System™ but after some soul searching we thought it would be too intrusive on the musician.
	The main corrections are at very low levels, and in most practical live music settings, the effect is pretty minor.		The main corrections are at very low levels, and in most practical live music settings, the effect is pretty minor.
	As a rule-of-thumb guideline, turn the bass up a notch as you turn the volume down.		As a rule-of-thumb guideline, turn the bass up a notch as you turn the volume down.


			== Crossover with Line Out ==
			{{:Crossover with Line Out}}

ST: /* 24db / ocatve */

2013-04-20T15:22:07Z

24db / ocatve

← Older revision		Revision as of 15:22, 20 April 2013
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	==== 24db / ocatve ====		==== 24db / ocatve ====
	The crossover in the power stand is a pretty steep one, 24dB/octave. So an octave above crossover, the B1's are 24dB down and below crossover the L1's are 24dB down. They get out of each other's way pretty quickly.		The crossover in the power stand is a pretty steep one, 24dB/octave. So an octave above crossover, the B1's are 24dB down and below crossover the L1's are 24dB down. They get out of each other's way pretty quickly. — Cliff-at-Bose
	<ref>Cliff-at-Bose [http://bose.infopop.cc/eve/forums/a/tpc/f/3976055944/m/5956075005?r=8661022632#8661022632 Phasing on the Personalized Amplification System]</ref>		<ref>Cliff-at-Bose [http://bose.infopop.cc/eve/forums/a/tpc/f/3976055944/m/5956075005?r=8661022632#8661022632 Phasing on the Personalized Amplification System]</ref>

ST: /* 24db / ocatve */

2013-04-20T15:21:34Z

24db / ocatve

← Older revision		Revision as of 15:21, 20 April 2013
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	==== 24db / ocatve ====		==== 24db / ocatve ====
	The crossover in the power stand is a pretty steep one, 24dB/octave. So an octave above crossover, the B1's are 24dB down and below crossover the L1's are 24dB down. They get out of each other's way pretty quickly.		The crossover in the power stand is a pretty steep one, 24dB/octave. So an octave above crossover, the B1's are 24dB down and below crossover the L1's are 24dB down. They get out of each other's way pretty quickly.
	<ref>Cliff-at-Bose[~~url=~~http://bose.infopop.cc/eve/forums/a/tpc/f/3976055944/m/5956075005?r=8661022632#8661022632]Phasing on the Personalized Amplification System~~[/url~~]</ref>		<ref>Cliff-at-Bose [http://bose.infopop.cc/eve/forums/a/tpc/f/3976055944/m/5956075005?r=8661022632#8661022632 Phasing on the Personalized Amplification System]</ref>

	=== More Bass Talk ===		=== More Bass Talk ===

ST: /* 24db / ocatve */

2013-04-20T15:20:39Z

24db / ocatve

← Older revision		Revision as of 15:20, 20 April 2013
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	==== 24db / ocatve ====		==== 24db / ocatve ====
	The crossover in the power stand is a pretty steep one, 24dB/octave. So an octave above crossover, the B1's are 24dB down and below crossover the L1's are 24dB down. They get out of each other's way pretty quickly.		The crossover in the power stand is a pretty steep one, 24dB/octave. So an octave above crossover, the B1's are 24dB down and below crossover the L1's are 24dB down. They get out of each other's way pretty quickly.
	<ref>[url=http://bose.infopop.cc/eve/forums/a/tpc/f/3976055944/m/5956075005?r=8661022632#8661022632]~~Cliff-at-Bose~~[/url]</ref>		<ref>Cliff-at-Bose[url=http://bose.infopop.cc/eve/forums/a/tpc/f/3976055944/m/5956075005?r=8661022632#8661022632]Phasing on the Personalized Amplification System[/url]</ref>

	=== More Bass Talk ===		=== More Bass Talk ===

ST: /* {{Classic}} and {{Model I}} */

2013-04-20T15:19:13Z

{{Classic}} and {{Model I}}

← Older revision		Revision as of 15:19, 20 April 2013
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	Here's a bit more from Hilmar-at-Bose about the really low notes:		Here's a bit more from Hilmar-at-Bose about the really low notes:

	[[Bass Frequencies]]		[[Bass Frequencies]]

			==== 24db / ocatve ====
			The crossover in the power stand is a pretty steep one, 24dB/octave. So an octave above crossover, the B1's are 24dB down and below crossover the L1's are 24dB down. They get out of each other's way pretty quickly.
			<ref>[url=http://bose.infopop.cc/eve/forums/a/tpc/f/3976055944/m/5956075005?r=8661022632#8661022632]Cliff-at-Bose[/url]</ref>

	=== More Bass Talk ===		=== More Bass Talk ===

ST: Category:L1® System

2009-04-21T14:50:55Z

Category:L1® System

← Older revision		Revision as of 14:50, 21 April 2009
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	<references/>		<references/>
	[[category:Bass]]		[[category:Bass]]
	[[~~category~~:~~L1™~~ System]]		[[Category:L1® System]]
	[[category:Technical]]		[[category:Technical]]
	[[category:Terminology]]		[[category:Terminology]]

ST: tabletoc

2008-01-18T09:50:10Z

tabletoc

← Older revision		Revision as of 09:50, 18 January 2008
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			<table><tr>
			<td valign="top" width="250">__TOC__</td>
			<td valign="top">
	The following is based on information that was available when the {{Classic}} was in production. This information is equally applicable to the {{Model I}}. The {{Model II}} crossover is fixed at 200 Hz and does not vary depending on whether or not {{B1}}s are attached to the Power Stand.		The following is based on information that was available when the {{Classic}} was in production. This information is equally applicable to the {{Model I}}. The {{Model II}} crossover is fixed at 200 Hz and does not vary depending on whether or not {{B1}}s are attached to the Power Stand.
			</td>
			</tr></table>
	===Crossover —Definition ===		===Crossover —Definition ===
	; I'm familiar with the term 'crossover,' but not really with its meaning.		; I'm familiar with the term 'crossover,' but not really with its meaning.
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	When there is nothing attached to Amp 3 output (where we normally connect the blue B1 cable) the Powerstand does this:		When there is nothing attached to Amp 3 output (where we normally connect the blue B1 cable) the Powerstand does this:

	==== {{Classic}} and {{Model}} ====		==== {{Classic}} and {{Model I}} ====
	* Frequencies above 110 Hz are sent to the L1 Cylindrical Radiator™ This is less of a "crossover" and more of a cutoff just because there's no point sending frequencies to the L1 that it can't reproduce.		* Frequencies above 110 Hz are sent to the L1 Cylindrical Radiator™ This is less of a "crossover" and more of a cutoff just because there's no point sending frequencies to the L1 that it can't reproduce.

ST: Applicability to different models

2008-01-18T09:47:20Z

Applicability to different models

← Older revision		Revision as of 09:47, 18 January 2008
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			The following is based on information that was available when the {{Classic}} was in production. This information is equally applicable to the {{Model I}}. The {{Model II}} crossover is fixed at 200 Hz and does not vary depending on whether or not {{B1}}s are attached to the Power Stand.

			===Crossover —Definition ===
	; I'm familiar with the term 'crossover,' but not really with its meaning.		; I'm familiar with the term 'crossover,' but not really with its meaning.

Line 11:		Line 14:
	When there is nothing attached to Amp 3 output (where we normally connect the blue B1 cable) the Powerstand does this:		When there is nothing attached to Amp 3 output (where we normally connect the blue B1 cable) the Powerstand does this:

			==== {{Classic}} and {{Model}} ====
	* Frequencies above 110 Hz are sent to the L1 Cylindrical Radiator™ This is less of a "crossover" and more of a cutoff just because there's no point sending frequencies to the L1 that it can't reproduce.		* Frequencies above 110 Hz are sent to the L1 Cylindrical Radiator™ This is less of a "crossover" and more of a cutoff just because there's no point sending frequencies to the L1 that it can't reproduce.

ST at 09:42, 18 January 2008

2008-01-18T09:42:08Z

← Older revision		Revision as of 09:42, 18 January 2008
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	; I'm familiar with the term 'crossover,' but not really with its meaning.		; I'm familiar with the term 'crossover,' but not really with its meaning.

	''Audio crossovers are a class of electronic filters designed specifically for use in audio applications, especially hi-fi. A commonly used dynamic loudspeaker driver is incapable of covering the entire audio spectrum all by itself. Thus, crossovers serve the purpose of splitting the audio signal into separate frequency bands which can be handled by individual loudspeaker drivers optimized for those bands. A combination of multiple drivers each catering to a different frequency band constitutes most hi-fi speaker systems. An audio crossover may also be constructed mechanically and is commonly found in full-range speakers.''		''Audio crossovers are a class of electronic filters designed specifically for use in audio applications, especially hi-fi. A commonly used dynamic loudspeaker driver is incapable of covering the entire audio spectrum all by itself. Thus, crossovers serve the purpose of splitting the audio signal into separate frequency bands which can be handled by individual loudspeaker drivers optimized for those bands. A combination of multiple drivers each catering to a different frequency band constitutes most hi-fi speaker systems. An audio crossover may also be constructed mechanically and is commonly found in full-range speakers.''

ST: More Bass Talk / Crossover 110

2008-01-18T09:41:35Z

More Bass Talk / Crossover 110

@@ Line 1: / Line 1: @@
-  quote: I'm familiar with the term 'crossover,' but not really with its meaning.
+  ; I'm familiar with the term 'crossover,' but not really with its meaning.
 ''Audio crossovers are a class of electronic filters designed specifically for use in audio applications, especially hi-fi. A commonly used dynamic loudspeaker driver is incapable of covering the entire audio spectrum all by itself. Thus, crossovers serve the purpose of splitting the audio signal into separate frequency bands which can be handled by individual loudspeaker drivers optimized for those bands. A combination of multiple drivers each catering to a different frequency band constitutes most hi-fi speaker systems. An audio crossover may also be constructed mechanically and is commonly found in full-range speakers.''
@@ Line 27: / Line 27: @@
 [[Bass Frequencies]]