Re: Premium audio Watts?

["Jason B. McEachin" <jason@pop.net>]

If Mark didn't cover everything you want to know about types of boxes,
check JL Audio's
web page( jlaudio.com).  They have good info on what to get.  And if you
have a chance
try the different enclosures for yourself then make up your own mind.  I
have two infinity
Kappa 10's w/ 115w/ch each with about 15 watts rms going to the stock
speakers
and it sounds pretty good.  The Bass is awesome.  The best upgrade to any
stock system
is an amp and a sub. good luck.  And yes I too use a sealed box, more room
for error in
design.
Jason


- ----------
> From: Mark Radelow <rpcprod@hotmail.com>
> To: ANDREW_ATWELL@HP-PaloAlto-om20.om.hp.com; gti-vr6@dev.tivoli.com;
jettaglx@igtc.com
> Subject: Re: Premium audio Watts?
> Date: Tuesday, August 05, 1997 4:24 PM
> 
> Hi Andy, Mark here.  Regarding the stock stereo.  If you have a Premium 
> Stereo in your Mexican-made car then, most likely, it is actually a 
> Clarion head unit.  As far as RMS power is concerned you are probably 
> looking at somewhere in the neighborhood of between 12 to 15 watts RMS 
> (Remember it only takes, on average, one watt to drive a speaker at 
> 90decibels).  I powered subwoofer would be a good way to go if you 
> wanted to be nice and conservative (nothing wrong with that).  Regarding 
> the different types of enclosures.  The three main types are sealed, 
> ported, and bandpass.  Unless you are looking to BOOM!BOOM! I would not 
> consider a bandpass.  The whole reason bandpass boxes are so popular is 
> that the design of the box cancels out any distorting waves.  The 
> speaker still makes them, you just don't hear 'em.  Good if you want to 
> boom, bad if you care about your speakers ;).  The next type of 
> enclosure is the ported box.  This is what most home speakers have 
> because it enables relatively small speaker/wattage combinations to put 
> out a good amount of bass.  The problem is that if the box is not built 
> perfectly to the type of speaker you are using the sound will be 
> horrible!  This type of enclosure is good if you are looking to have 
> good bass but have a relatively small power supply (although I would not 
> recommend them).  The third type, which is also the most popular and my 
> personal favorite, is the sealed enclosure (I also know the most about 
> these).  Simply put, a sealed enclosure is exactly like a ported box 
> except there is no "port" to the inside of the box.  What makes the 
> sealed enclosure so good is that bass response is excellent except down 
> way low.  Since the speakers are closed in the back they have excellent 
> dampening.  What this means is that the sealed box controls speaker 
> excursion very well.  This translates to really tight bass that has 
> excellent transient response.  Transient response is the ability the 
> speaker has to make fast transitions from different notes. Like a bass 
> guitar planning rapidly.  The disadvantage is that the sealed box is the 
> least efficient and thus requires the most power.  But it really is not 
> that bad.  In my old car I had 2 JL Audio 10 inch subwoofers in a 1.67 
> cubic foot box and with 50 watts running to each of them I was able to 
> hit 126 decibels.  That is MUCH louder than you ever need.  All this 
> information is assuming the box is built correctly (each speaker has 
> different paramters for box size, etc. etc.).  It really depends on what 
> kind of music you want to listen too.  Okay I am rambling on now and 
> this is probably more info than you ever wanted.  I'll shuddup know.  If 
> you want more info email me.
> 
> 
> Mark Radelow
> VW Jetta Homepage
> jetta.aosi.net
> 
> >From: ANDREW_ATWELL@HP-PaloAlto-om20.om.hp.com
> >Date: Tue, 5 Aug 97 12:44:47 -0700
> >Subject: Premium audio Watts?
> >TO: gti-vr6@dev.tivoli.com, jettaglx@igtc.com
> >
> >Item Subject: cc:Mail Text
> >     Anyone know the RMS power rating for the Panasonic Premium Audio 
> head 
> >     unit?  I am thinking about a small upgrade.  keeping factory head 
> unit 
> >     and speakers, put bass blocking circuits on the stock speakers, 
> and 
> >     adding a powered Collins 8"subwoofer.  Any thoughts?  suggestions? 
> >     Comments?  Anyone have experience with the Collins Subs? or could 
> give 
> >     me insite on the pluses and minuses of enclosed vs. tube/vented 
> vs. 
> >     bandpass subs?
> >     Thanks 
> >     andy
> 
> 
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