Bass shaker report - diyAudio
Go Back   Home > Forums > General Interest > Car Audio

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 21st April 2006, 10:36 PM   #1
diyAudio Member
 
Join Date: Aug 2005
Default Bass shaker report

I just installed the aura bass shakers into my 2002 Toyota Spyder and they are a little less impressive than what I was hoping for. I am glad that they blend in well-but they are not noticable when my sub is on.

Anyway-Are the AURA PRO BASS SHAKERS any better????? They handle a little more power but I dont know if that is good. I am running them stright off of my pioneer head unit---50W.


Any opinions are welcome!

Dominick
__________________
A real amateur enthusiast!
  Reply With Quote
Old 22nd April 2006, 02:26 AM   #2
owdi is offline owdi  United States
diyAudio Member
 
owdi's Avatar
 
Join Date: Sep 2003
Location: Bellevue, WA
They would be a lot more impressive if you were running them off an amp. If you are running them off the head unit you should try to build a passive xover, even a simple inductor wired in series will help.

Dan
  Reply With Quote
Old 22nd April 2006, 02:49 AM   #3
diyAudio Member
 
Join Date: Apr 2003
Location: Seattle
Your headunit probably doesn't have enough juice, either, for sustaining them long term. 50W is probably it's momentary peak output.
  Reply With Quote
Old 22nd April 2006, 03:31 AM   #4
diyAudio Member
 
Join Date: Aug 2005
I have all 4 headunit outs available since I use the pre-outs for the actual speakers. While I am sure it has been asked...

Can I wire 2 channel together into 1 shaker?
The shakers are rated at 4 ohms and I am running a Pioneer Premier.

Thanks guys,
Dominick
__________________
A real amateur enthusiast!
  Reply With Quote
Old 22nd April 2006, 04:21 AM   #5
diyAudio Member
 
Join Date: Nov 2004
Location: sk
Send a message via AIM to ocool_15 Send a message via Yahoo to ocool_15
Quote:
Originally posted by Dominick22
I have all 4 headunit outs available since I use the pre-outs for the actual speakers. While I am sure it has been asked...

Can I wire 2 channel together into 1 shaker?
The shakers are rated at 4 ohms and I am running a Pioneer Premier.

Thanks guys,
Dominick


You likely can. pretty much all car amps are intended to be used into 4ohms bridged. A few handle lower impedence bridged. Check the specs on the amp.
  Reply With Quote
Old 24th April 2006, 05:02 AM   #6
owdi is offline owdi  United States
diyAudio Member
 
owdi's Avatar
 
Join Date: Sep 2003
Location: Bellevue, WA
Quote:
Originally posted by Dominick22
I have all 4 headunit outs available since I use the pre-outs for the actual speakers. While I am sure it has been asked...

Can I wire 2 channel together into 1 shaker?
The shakers are rated at 4 ohms and I am running a Pioneer Premier.

Thanks guys,
Dominick
Most likely you cannot. Head units are typically not bridgable. A passive crossover would help because your HU will waste less power sending high frequency sound to the shakers.

Also, installing the shakers is critical. They need to be firmly attached to your seats. I had mine on tight and they could rumble so much it was uncomfortable.

Dan
  Reply With Quote
Old 24th April 2006, 05:10 AM   #7
diyAudio Member
 
Join Date: Nov 2004
Location: sk
Send a message via AIM to ocool_15 Send a message via Yahoo to ocool_15
Quote:
Originally posted by owdi


Most likely you cannot. Head units are typically not bridgable. A passive crossover would help because your HU will waste less power sending high frequency sound to the shakers.



Dan

Dan is correct if your using a deck for power. Any Aftermarket I've seen for many years are already bridged internally.
  Reply With Quote
Old 28th April 2006, 04:18 AM   #8
Relax is offline Relax  United States
diyAudio Member
 
Join Date: Jun 2005
Location: Dayton
the inductor will simply not send the high frequencies to the shakers, instead the highs will be wasted as heat, not saving your HU any work.

Your best bet would be to send them the full rms specified by aura via an external amp.
  Reply With Quote
Old 28th April 2006, 06:10 AM   #9
MOER is offline MOER  United States
diyAudio Member
 
Join Date: Aug 2003
Location: SIMI VALLEY CA
Default Aura shakers

Your head unit is incapable of delivering 50 watts of power. At a battery voltage of 14.4v means that the signal can swing each side of 7.2 volts. This is the peak supply. The RMS is 0.7071 of this 5.09v. With some losses in the output stage of at least 0.8 volts this drops to 4.29v. Typically all heads have bridged amps inside so the voltage swing on the speaker out is 4.29v x 2 = 8.58 volts. Square this and divide by 4 (Your spk impedance) and you have a grand total of 18.4 watts of continuous power before clip. Now your battery is unlikely to be at 14.4 volt and typicallt sits in the 13 volt region when fully charged, no lights or air on.
Now the power will be typically 14 watts per channel.

There is no peak power from a head unit as the battery voltage determines this entirely and the battery is NOT going up to 21.6 volts which is the min voltage required for a pair of bridged amps to deliver 50 watts peak.

My company uses tactile transducers, similar to the Aura, for a medical project and also for outdoor spas (www.hotsprings.com) and they demand unclipped clean power for reliability. So we build large class D amplifiers and make sure that we NEVER run the amps near clipping.

We have tried these transducers in the car, and they work well, but do demand lots of power unless you can mount it under your seat

Steve
  Reply With Quote
Old 28th April 2006, 10:52 PM   #10
owdi is offline owdi  United States
diyAudio Member
 
owdi's Avatar
 
Join Date: Sep 2003
Location: Bellevue, WA
Quote:
Originally posted by Relax
the inductor will simply not send the high frequencies to the shakers, instead the highs will be wasted as heat, not saving your HU any work.
That is completely wrong. There will be some power lost as heat in the inductors, but this actually gets smaller as frequency increases.

Madisound has some large iron core inductors for sale right now which could work well, especially if you can pair them up with a cap to get a second order passive crossover.

Dan
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Possible to make a bass shaker amp? dhp78 Subwoofers 6 2nd May 2005 04:43 PM
multiple bass shaker amp mightyjimbo Subwoofers 5 10th November 2004 12:09 AM
diy bass shaker michael Subwoofers 3 26th March 2004 10:16 AM
tactile transducer BASS SHAKER GUS Subwoofers 3 24th March 2004 12:10 PM
Bass shaker attached to a free-standing board. Circlotron Multi-Way 5 19th March 2003 01:15 AM


New To Site? Need Help?

All times are GMT. The time now is 09:33 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2