The Subwoofer DIY Page - Discussion Forum

[ The Subwoofer DIY Page - Discussion Forum ] [ FAQ ]

[Previous Message] [Next Message]

Date: March 25, 2003 at 19:07:51
From: Formica, [hse-quebeccity-ppp3500716.sympatico.ca]
Subject: Re: sound quality of ported vs sealed boxes


I think people often refer to the sealed as being more SQ oriented simply based on the low group delay, and the mid-bass peak often created by a high-Q design (undersized box). The peak isn't actually more accurate, but a lot of people like it as it'll often fall into the kick-drum frequencies. As for frequency response, the ported box will be more accurate, but this comes at several expenses. Here is a quick list of + and - for each type of enclosure that I could think of:

Sealed box:

SQ: often described as being a "fast" as it'll have low "group delay" in milliseconds
SQ: won't extend into the lower frequencies as it will have a higher F3 (frequency with 3db reduced volume) and F6 (-6db)
SQ: Short but flat frequency response
SQ: slow frequency drop-off below systems frequency point
SPL: will have a lower average SPL due to the roll-off at a higher frequency
Design: Small size
Design: Easy to build


Ported design:

SQ: often described as being a "slower" as it'll have higher "group delay" in milliseconds
SQ: can extend into the lower frequencies, as it will have a much low F3 and F6
SQ: Long and flatter frequency response into lower octaves
SQ: fast frequency drop-off below tuning point
SPL: will have a higher average SPL due to the low frequency extension
Design: Larger Size
Design: Harder to design and build


  • View the previous message in this thread
  • Go to the top of this thread
  • View entire thread
    		•

    Posted with TalkShop version 2.74

    [Previous Message] [Next Message]



    Follow Ups:

    [ The Subwoofer DIY Page - Discussion Forum ] [ FAQ ]