Subwoofer Tutorial - 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 09-07-2009, 06:29 PM
MR.T3's Avatar
Elite Member
 
Activity Longevity
0/20 19/20
Today Posts
0/11 ssssss791
Location: Atlanta
Thanks: 2
Thanked 13 Times in 8 Posts
iTrader: (2)
Feedback Score: 2 reviews
Default Subwoofer Tutorial

Hello all,

Some of you know me, some don't. My name is Johnathan Demuth, and I am absolutely obsessed with car audio and learning about what makes speakers great, and what makes them perceived to be great.

So, I have been reading a lot of stuff on forums about Subwoofers that will handle high power levels. I have also noticed how mis-informed and mis-guided the majority of the people discussing this topic actually are.

I know many people will disagree with my thoughts, and that is OK. People also doubted my 4.25" coil and 10.5" spiders for SPL and SQ....Ofcourse they never knew that my 4.25" coil weighed 40% less than most 3" coils....or that my suspension will freely move twice as far than the competition. Now they are copying it....makes me feel good. We have won 14 World Championships in SPL, 37 World Records in SPL, and 4 SQ World Championships!! in only 3 years!!!! Am I cocky? No..... But I am glad my non-stop efforts eventually pay off....

As a speaker designer and from my learnings in real world use (which is where most of my actual useful knowedge has come from in the trenches working side by side with SPL guys and world champion SQ guys), I will mention a few thoughts (very random) that I have on Subwoofers that handle 4K, 5K and any other currently impossible claims that exsist out there. Most of us think that "wattage" is the rule of thumb that blows woofers up. This is incorrect. It is amperage and time playing that heats a coil up, that blows your woofers.

A subwoofer is somewhat like a car and its driveline....in generating horsepower.... and using horsepower.
Every subwoofer has limitations....
The trend today is for companies to design a subwoofer coil to basically be a big "heat sink". Which increases its power handling ability "horsepower" ofcourse.... But have we ever thought about how much the moving assembly "car" weighs? Or where does the "car" stop increasing in mph "output"? Even though you might have "1000hp" or "6k watts"...It might peak at "180mph" with only "600hp" or "4k watts".... and the rest is wasted into heat conversion..... I have seen woofers with 2" voicecoils that are 70mm tall wire!!! and only 1 inch of peak to peak excursion? Why? To be a heatsink and dissipate heat.... Sure it handles alot of power.... most converted into heat to warm the vehicle.

It is very simple to design a subwoofer to handle a ton of power (i/e 4k, 5k, 6k RMS). Just give it a huge and heavy 8 layer coil that is like 80mm tall.... and stiff spiders. Basically design the woofer coil to be a big heatsink of power conversion.... from power to heat dissipation. Have we ever thought about where this super heavy coil and mis-designed suspension actually stop increasing in output?? Why have a 1000 hp "car" that stops at 180mph when you can have a properly designed 600hp "car" that exceeds the first ones output.

When we go out and buy that amplifier "horsepower" that costs us a fortune.... we want to use every last watt that we paid for correct?? Not waste 40% of the power on a big heavy coil that converts it into heat dissipation.....

When shopping for a subwoofer, we should do our research.
We should buy a woofer that uses every watt that it possible can....
There are a few great woofers out there that offer a nice well designed lightweight coil and good suspension system. Even woofers using only 2K watts that will exceed the output of "heatsink" woofers with 4k watts. Yes there are 2, maybe 3 great 4" coil woofers out there that use more of our power efficiently and give us our moneys worth.... and not just bragging rights on how many "watts" of heat your woofer will dissipate...

If we drag race 2 cars with identical 300hp engines.... 1 is a school bus, and one is a honda civic.... guess which one wins...... Same goes for speakers both in SPL and accurate sound reproduction.

We should realize that to brag about power handling of a 8 layer coil for spl.... with its tall wire "heatsink" design..... it actually not anything to brag about.
Now bragging about a 4 layer coil and super light moving mass that exceeds the others output, might be cool to do.

When we go buy these HUGE amps to do HUGE power, lets make sure that we can convert the power into sound, not heat. We pay alot for these woofers....ask about weights of coil...moving mass... layers of wire, height of wire. Demand less for your money! Weight that is...lol

Next time we see a woofer that boasts "4,000 watts RMS".... or "6,000 watts RMS".... or some of the silly claims..... lets ask ourselves.... which one uses the wattage I am buying to the most potential both in excursion and sound output..... not which one handles the most horsepower.... because horsepower not going to the pavement, is wasted horsepower indeed.

Until next time I have a random thought,

Johnathan
__________________
__________________
Johnathan Demuth-OWNER
T3 Industries Inc.
T3 Audio L.L.C.
T3 Elite L.L.C.
D.A.V. Engineering L.L.C.
"Technological advancement is like an axe in the hands of a mass murderer" ; Albert Einstein
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
Win ISD Tutorial? XxAkroNyMxX Enclosure Discussion & Design Construction Help 0 08-04-2009 08:50 PM
Subwoofer teardown Tutorial? BlackWaterOp General Car Audio Discussion & Questions 13 07-14-2009 02:49 PM
Sketchup Tutorial caps Tutorials & Quick References 2 01-17-2009 02:03 PM
[MODERATE] How To Do The Big III: Tutorial danteBirosel Tutorials & Quick References 2 11-12-2008 03:05 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 02:11 AM.


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.