the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
icon

Bass is lacking


Post ReplyPost New Topic
< Prev Topic Next Topic >
temple2101 
Member - Posts: 32
Member spacespace
Joined: January 13, 2004
Location: United States
Posted: June 03, 2004 at 12:53 PM / IP Logged  

Hey guys ... I recently installed 2 - 12" MTX 6000 subs each on their own MTX 421D amp.  First off ... I am not very impressed with the sound and I'm trying to figure out what the problem is so I have a couple questions.  First off the subs are facing toward the front of the car (in a 2004 civic) and are about an inch from the back seats.  It kinda seems like I get some distortion because of this.  Anyway ... overall it just seems like the bass is lacking.  I like to listen to my music loud sometimes, but I don't just like loud bass.  I like full sounding bass.  When I am outside the car the bass sounds great, but inside the car it is .... well it's hard to describe but hopefully somebody knows what I'm talking about.

So ... recommendations would be great ... like different subs, amps, whole new setup (i am currently building a new enclosure out of fiberglass so the subs will face the back of the trunk and I am going to dynamat the whole trunk).  Thanks in advance for the help!

cheagreen 
Copper - Posts: 62
Copper spacespace
Joined: March 01, 2004
Location: United States
Posted: June 03, 2004 at 1:09 PM / IP Logged  
The subs should be facing the trunk hatch.
Head Unit:Pioneer-Deh-1600
Fronts:Kicker 6x8 S57's
Front Amp:Coustic PowerLogic Amp460
Rear Fill:Stock 6x8's
Subs: 2 10" JL Audio W3's
Sub Amp: JBL bp600.1
Wiring: KnuKonceptz
DYohn 
Moderator - Posts: 10,740
Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: April 22, 2003
Location: Arizona, United States
Posted: June 03, 2004 at 1:15 PM / IP Logged  
Yes, try turning them around.  And also make sure they are in phase with each otehr and with teh reast of your system.
Support the12volt.com
temple2101 
Member - Posts: 32
Member spacespace
Joined: January 13, 2004
Location: United States
Posted: June 03, 2004 at 1:45 PM / IP Logged  
Thanks guys ... hopefully with my new box facing the other way that will help.  I will also check the phase.  About the phase though, never really messed with it.  I know the settings are 0 and 180 ... can you give me some info on the difference of the two and when to use which setting?  I never really understood that.  Thanks again!
pimpincavy 
Silver - Posts: 880
Silver spacespace
Joined: May 20, 2004
Location: United States
Posted: June 03, 2004 at 1:50 PM / IP Logged  
If you really want some good bass take out the back seat, or fold it down. Then make a custom box so the subs are actually inside the car, face the subs forward. Ive heard some amazing systems set up like that.
DYohn 
Moderator - Posts: 10,740
Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: April 22, 2003
Location: Arizona, United States
Posted: June 03, 2004 at 2:43 PM / IP Logged  

temple2101 wrote:
Thanks guys ... hopefully with my new box facing the other way that will help.  I will also check the phase.  About the phase though, never really messed with it.  I know the settings are 0 and 180 ... can you give me some info on the difference of the two and when to use which setting?  I never really understood that.  Thanks again!

There are two kinds of phase in audio: electrical phase and acoustical phase.  You want both of your woofers wired in the same electrical phase.  This means (very basically) that both + terminals are wired to the + terminal of the amp.  If they are in opposite electrical phase, the sound from one will cancel out part of the sound from the other since they will be moving in opposite directions.  You also want to wire the subs in electrical phase with the rest of your speakers.

Acoustic phase has to do with the timing of sound waves moving around in your car.  Sound is an air pressure wave.  Again very basically, think of sound waves like ocean waves.  You want the sound waves from each speaker to "peak" at the same time at your listening position.  If the wave from your sub peaks while the wave from your main speakers is minimum, they can cancel parts of each other and reduce what you hear in your listening position.  This also often happens if a sub cone faces one direction and the port in the enclosure faces another direction.

The phase switch on your amplifier changes the electrical phase of the signal going to the speakers without having to change the wiring around.  This is useful to correct acoustic phase cancellation as it will "reverse" the wave polarity (positive and negative peak of the wave.) 

In your case, put on some music you know well and listen to it from your driver's seat at your normal listening volume.  Then switch the phase on the sub amp and go back to the driver's seat and listen again.  If it sounds different, you have either created or corrected acoustic phase cancellation.  Leave it in the position that sounds the best.  If you cannot hear any difference, then there is insufficient space inside the car for the sound waves from the sub to fully peak before they reach your ears. Low frequency sound waves are very long (50Hz is about 23 feet) so they require physical space to develop.  This is also why sometimes bass sounds "better" outside the car than inside it: the low frequency waves have the space they need to fully develop.  Try moving the subs so they fire towards the rear of the car and see if this makes a difference (this increases the effective distance the sound must travel since the wave must now bounce off the rear inside of the trunk before it gets to you.)

Support the12volt.com
temple2101 
Member - Posts: 32
Member spacespace
Joined: January 13, 2004
Location: United States
Posted: June 03, 2004 at 3:04 PM / IP Logged  
Thanks!  I will try that and see how it goes!

Sorry, you can NOT post a reply.
This topic is closed.

  Printable version Printable version Post ReplyPost New Topic
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot delete your posts in this forum
You cannot edit your posts in this forum
You cannot create polls in this forum
You cannot vote in polls in this forum

  •  
Search the12volt.com
Follow the12volt.com Follow the12volt.com on Facebook
Saturday, February 4, 2023 • Copyright © 1999-2023 the12volt.com, All Rights Reserved Privacy Policy & Use of Cookies
Disclaimer: *All information on this site ( the12volt.com ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.

Secured by Sectigo
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
Support the12volt.com
Top
the12volt.com spacer
the12volt.com spacer