Subwoofers that sound "good" vs those that sound "bad" - Car Audio Classifieds!
Car Audio Classifieds!  

Go Back   Car Audio Classifieds! > Car Audio Help & Discussion > Tutorials & Quick References

Tutorials & Quick References This section is for how-to's and quick references for car audio.


Notices

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 09-12-2009, 11:43 AM
Wheres The Butta's Avatar
CACO Supporter
 
Activity Longevity
0/20 19/20
Today Posts
0/11 sssss6101
Location: New Jersey
Thanks: 103
Thanked 102 Times in 85 Posts
iTrader: (21)
Feedback Score: 21 reviews
Default Subwoofers that sound "good" vs those that sound "bad"

Something that I personally (and many others as well) are probably tired of telling every new member... I hear the same question over and over again - "Which subwoofer will sound better?" or the other variation, "Which subwoofer will get louder?" I just wanted to post some quick facts about subwoofers that the newcomer will benefit from knowing.



The biggest factor in whether a subwoofer sounds "good" or "bad" (or loud) is not the woofer itself. It's the install: that means the box and box placement, sound deadening, the amount of power you're running, the subsonic filter, and the crossover point. Probably the single most important consideration in getting loud is the enclosure. A crappy enclosure will gimp your outpt no matter what you're running, but a good enclosure can allow even low budget woofers to have decent output. Make sure you run the right kind of enclosure for your woofer and for your application.

The subwoofer itself really has a comparitively small role in sounding "good". Different subwoofers are suited to different things, but just about any subwoofer of reasonable quality can sound "good" if it's installed properly.

When people say something sounds "boomy" they're generally talking about the response curve having nasty peaks - that mostly has to do with the box, the EQ, and the vehicle; it also has to do with the fact that subwoofers are usually running on 10x more power than the front stage, so the volume of any note they play is exaggerated. This generally doesn't have much to do with the subwoofer itself.

When people say a subwoofer sounds "tight" and they're talking more about characteristics of the enclosure. A small sealed box will have more of a "tight" sound to it due to the air pressure within the enclosure. As the subwoofer cone moves in and out, the internal air pressure will attempt to pull the cone back to the resting position. As the driver begins to approach full excursion, the air pressure is very great, and thus full extension is not as easy to reach as a vented enclosure; however as the woofer oscilates, the transition from one note to the next is facilitated by the air pressure. This ease of transition but difficulty reaching full extension is what causes the "tight" response of a sealed enclosure.

Vented enclosures are more efficient and allow greater output by effectively doubling the output of the speaker. What they do is utilize the waves created by the REAR of the speaker cone to reinforce those created by the front of the cone. In a sealed enclosure, the waves created by the rear of the speaker cone aren't heard because they are contained within the enclosure. Due to the vented enclosure having less internal air pressure as compared to the sealed enclosure, it isn't as controlled or "tight" - but it does have much more output.


As far as the crossover point - Midbass is typically "punchy" so if you cross your subwoofer too high, you'll hear "punchy" bass produced from it. You want to cross your subwoofer over 80hz or lower - never higher unless you're more experienced and building an advanced SQ system.

Subsonic filter - you really can't hear anything below 20hz, but those frequencies still require power to play. By eliminating the frequencies below 20hz you save your amplifier and subwoofer some unnecessary effort. (these frequencies are used for sounds like explosions and car crashes, so if you're watching a movie you might want to have them on)

Sound Deadening - this is important for both SPL and SQ. If your whole car rattles when the bass hits, it's going to sound like absolute garbage. Are you trying to listen to bass or the sound of your car falling apart? Sound deadening also has the wondrous effect of strengthening the panels of your car, so that they don't flex as much and thus can build more internal pressure (SPL). Sound deadning is good stuff.

Power: It's always better to have extra power on tap. Remember, if you have extra power on tap, you don't have to use it. If you have too little power to really get your woofer moving, the tendency is to turn the gain up on the amplifier... when you do that, you're most likely exceeding the amount of power the amplifier was designed to produce, and you are most likely giving your speaker a clipped signal - this is one of the most common causes of a blown subwoofer. I'll say this flat out - clipping is the mortal enemy of ALL subwoofers, and can be avoided 100%. Having more power available is ALWAYS better than less.

Cliffs:

"Boomy" generally has nothing to do with the woofer itself.

Boxes

Sealed = tight and punchy because of air pressure controlling the cone
Vented (ported) = twice as loud because it uses the waves created by both front AND back of the cone rather than just one side, but lose some control of the cone due to less air pressure

Since this is just for beginners and because it would take a looong time to fully explain, I'm not going to get into bandpass.

Crossover points - Low-pass at 80hz or less and subsonic at 20hz.

Sound Deadening - Use it to increase panel rigidity and eliminate vibration.

Power - always better to have extra headroom, do NOT crank the gains to compensate for a weak amplifier or else you will clip the signal and may damage your subwoofer
__________________

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
____________________________________

IASCA Pro AM and MECA Modex -->
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Last edited by Wheres The Butta; 09-24-2009 at 08:31 AM.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 09-12-2009, 11:46 AM
justin smith's Avatar
Elite Member
 
Activity Longevity
0/20 19/20
Today Posts
0/11 ssssss653
Location: crestview fl, pannhandle
Age: 29
Thanks: 2
Thanked 0 Times in 0 Posts
iTrader: (3)
Feedback Score: 3 reviews
Default

sticky?
Reply With Quote Quick reply to this message
  #3  
Old 09-12-2009, 11:53 AM
Wheres The Butta's Avatar
CACO Supporter
 
Activity Longevity
0/20 19/20
Today Posts
0/11 sssss6101
Location: New Jersey
Thanks: 103
Thanked 102 Times in 85 Posts
iTrader: (21)
Feedback Score: 21 reviews
Default

Quote:
Originally Posted by justin smith View Post
sticky?
I hope so
__________________

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
____________________________________

IASCA Pro AM and MECA Modex -->
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Car Audio Classifieds! forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Location
Where you live
Level of Car Audio Knowledge
What's your level of car audio?

Log-in



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
[SOLD] 15" Sound Stream XXX BNIB SPY 15" Subwoofers 26 01-09-2010 10:11 PM
[SOLD] 2 12" dc sound lvl3 dual 4 teamsolo 12" Subwoofers 10 09-09-2009 12:42 AM
wtb 2 12" DC sound lab lev 4xl or lev 5 loudaccent Wanting to Buy (WTB) 9 06-23-2009 09:41 AM
[No longer for sale] 15" Sound Stream XXX SPY 15" Subwoofers 0 06-12-2009 03:42 PM
[SOLD]DC Sound Labs 10" Level 4 A.I. James 10" Subwoofers 7 12-01-2008 06:21 PM

» Amps
A/d/s/
Advent
Alphasonik
Alpine
American Bass
ARC Audio
Atomic
Audio Art
Audio Gods
Audiobahn
Audiocontrol
Audiopipe
Audison
Aura
Autotek
Avionixx
Bazooka
Beyma
Blaupunkt
Boss
Boston Acoustics
Bravox
Cadence
Cascade (CAE)
CDT Audio
Cerwin Vega
Clarion
Clif Designs
Concept
Coustic
Critical Mass
Crossfire
Crunch
DB Drive
DC Audio
DC Power
DEI
Denon
Diabolo
Diamond
Digital Designs
Directed
DLS
Dual
DYnamat
Dynaudio
Earthquake
Eclipse
Elemental Designs
ESX
Eton
Farenheit
Fi Car Audio
Fix My Speaker
Focal
Fusion
Genesis
Ground Zero
Hafler
Helix
Hertz
Hifonics
Hushmat
Image Dynamics
Infinity
Interfire
JBL
Jensen
JL Audio
JVC
Kenwood
Kicker
Knu Konceptz
Kole Audio
Kove Audio
Lanzar
Lightning Audio
Linear Power
MA Audio
Magnat
Marantz
Massive Audio
MB Quart
McIntosh
Memphis
Metra
MMATS
Mobile Authority
Morel
MTX
Nakamichi
Niche Audio
O2 Audio
Ohio Generator
Optima
Orion
Oxygen Audio
OZ Audio
PG Audio
Phase Linear
Phoenix Gold
Pioneer
Polk
Power Acoustik
Powerbass
Powermaster
Precision Power
Profile
Pyle
Pyramid
RadioShack
Rainbow
Rampage
RE AUdio
Rockford Fosgate
Scanspeak
Scosche
Seas
Sony
soundstream
Sparkomatic
SPL Dynamics
Stinger
Sundown Audio
Swiss Audio
Targa
TC Sounds
TREO Engineering
TRU
Tsunami
Ultimate
US Acoustics
US Amps
Velodyne
Vifa
Viper
Visonik
Xtant
Zapco
Zed Audio
Powered by vBadvanced CMPS v3.2.3
Links
Amp Guts
amplifier, amp guts, ampguts, car audio classifieds, speakers and subs for sale with listings of 12 volt sound systems. Security systems for sale for aftermarket car audio equipment with amplifier and amps for sale
Car Audio Forum
car audio forum, moble audio, car stereo, wholesale car audio, 12 volt, with, amplifier, amp, subwoofer, sound quality, buy car audio, and sell automotive stereo systems for cars
Car Audio Sound Quality Forum
Sound QUality science based car audio forum, amplifier, subs and speaker design, fabrication help, sound systems forum, aftermarket car audio website for sound quality.
Car Stereo Forum
DIYMA car audio stereo forum for 12 volt car audio subwoofer and amplifier systems that have sound quality with wholesale car audio products.


All times are GMT -5. The time now is 04:57 PM.


Powered by vBulletin
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.6.0
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.