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
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
Dominick22 said:
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
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
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
Relax said:
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
Sorry, I meant that your HU will still work just as hard since it will be amplifying all frequencies still.
The inductor just stops the highs from going to your bass shakers.
A Passive crossover makes the system less efficient.
The bass shakers will benefit from only producing lower frequencies though.
The inductor just stops the highs from going to your bass shakers.
A Passive crossover makes the system less efficient.
The bass shakers will benefit from only producing lower frequencies though.
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