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<blockquote data-quote="helotaxi" data-source="post: 377523" data-attributes="member: 550915">It can be objectively proven that a sealed enclosure is more accurate than a ported or bandpass, however.If you are going to run a bandpass &quot;sub&quot; then it should be the only sub in your system.&nbsp; If you are going to use a bandpass sub system then you must design the system around its limitations.&nbsp; The midbasses must be good and the transition from the sub to the mids is more demanding with a bandpass system.&nbsp; Just adding another sub playing the same frequencies as the bandpass is not the best answer though, as having different alignments (sealed, ported, bandpass) playing the same frequencies creates a muddled sound because of the different group delays.Most car systems are at least 3 way and some are 4 way.&nbsp; We are very familiar with the proper use of a sub.&nbsp; Many of us cross our subs at 60ish hz and some even lower.Actually if the system design is sound, an additional sub is not needed or wanted.&nbsp; A decent set of midbasses will be able to provide a good transition between the sub and the soundstage speakers.&nbsp; This will be the case at any volume.&nbsp; With a highpowered sub system some form of volume control for the sub is usually needed if you switch types of music regularly.Saying that most bandpass systems are not accurate is true though.&nbsp; The design of a bandpass system is involved and not cut and dry.&nbsp; The enclosure must be designed for the sub and the construction must be spot on.&nbsp; Any type of one size fits all bandpass is going to sound bad at best and destroy the sub at worst.&nbsp; Bandpasses CAN be made that are very accurate but the tradeoffs usually involve a tiny passband, horrible efficiency, or a HUGE enclosure.&nbsp; These tradeoffs tend to be more extreme than those involved with sealed and ported enclosures.&nbsp; The simple fact is that most people have never heard a proper bandpass enclosure that was designed and built with accuracy as the goal.&nbsp; It can be done, but few people have the time, patience, know-how, and skill to do it.</blockquote>

[QUOTE="helotaxi, post: 377523, member: 550915"] It can be objectively proven that a sealed enclosure is more accurate than a ported or bandpass, however. If you are going to run a bandpass "sub" then it should be the only sub in your system. If you are going to use a bandpass sub system then you must design the system around its limitations. The midbasses must be good and the transition from the sub to the mids is more demanding with a bandpass system. Just adding another sub playing the same frequencies as the bandpass is not the best answer though, as having different alignments (sealed, ported, bandpass) playing the same frequencies creates a muddled sound because of the different group delays. Most car systems are at least 3 way and some are 4 way. We are very familiar with the proper use of a sub. Many of us cross our subs at 60ish hz and some even lower. Actually if the system design is sound, an additional sub is not needed or wanted. A decent set of midbasses will be able to provide a good transition between the sub and the soundstage speakers. This will be the case at any volume. With a highpowered sub system some form of volume control for the sub is usually needed if you switch types of music regularly. Saying that [I]most[/I] bandpass systems are not accurate is true though. The design of a bandpass system is involved and not cut and dry. The enclosure must be designed for the sub and the construction must be spot on. Any type of one size fits all bandpass is going to sound bad at best and destroy the sub at worst. Bandpasses CAN be made that are very accurate but the tradeoffs usually involve a tiny passband, horrible efficiency, or a HUGE enclosure. These tradeoffs tend to be more extreme than those involved with sealed and ported enclosures. The simple fact is that most people have never heard a proper bandpass enclosure that was designed and built with accuracy as the goal. It can be done, but few people have the time, patience, know-how, and skill to do it. [/QUOTE]

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