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Old 12th July 2008, 08:46   #8371
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Originally Posted by Magma View Post
3.
hmm let me rephrase the question.
Consider the same brand and same range. Now if one has only 170W rms at their disposal and there are two sub options one which is rated 250rms and the other rated 150rms what moderately noticible/audible diffence (if any ) would one expect

You should expect cleaner and possibly louder output from the 250 rms rated sub.
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Old 12th July 2008, 09:24   #8372
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Originally Posted by navin View Post
1. please reconsider any amp that claims a bridged output that is 4x that of it's stereo output. This is theory and unless the amp has a fantastically low output impedance and fantastically high current deliverably this is very rare so consider such specs with a table spoon of salt (table spoon = a pinch and then some)
I suggest people copy paste and save this somewhere. Every time you read about magical low impedance driven power output, please go back and read the above.
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Old 12th July 2008, 09:33   #8373
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and dont forget sky high damping factors. another spec you can fudge when you claim low output impedance
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Old 12th July 2008, 11:22   #8374
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Originally Posted by greenhorn View Post
and dont forget sky high damping factors. another spec you can fudge when you claim low output impedance
The damping factor of the amp is one thing and to able to control it is another. It also depends on the thickness of the wire which is used to connect the sub and the amp..here is a little more detail on the same.

Damping Factor with Calculator
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Old 12th July 2008, 13:51   #8375
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True. If I use a 0/1 gauge cable between the amp and speaker, the damping factor would jump up to over 400?

But that has little bearing in actual application as driver impedance is not a constant in operation. Like Green said, DF is one of the most abused rarely understood specs.
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Old 12th July 2008, 14:20   #8376
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I guess since the calculator carries the disclaimer that it calculated the damping factor based on the wire alone , it can be let off the hook. and given that the original damping factor for the above calculation was 500... given a more realistic source damping factor above, I suppose we'd get a more realistic damping factor below as well
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Old 15th July 2008, 09:43   #8377
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Guru jis, I need a HU.
Between the Alpine CDA 9884E and CDA 9886, which one should I opt for? I'll be using CDs and USB HDD as source. Would like to add an ipod later on.
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Old 15th July 2008, 10:08   #8378
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Originally Posted by shuvd View Post
Guru jis, I need a HU.
Between the Alpine CDA 9884E and CDA 9886, which one should I opt for? I'll be using CDs and USB HDD as source. Would like to add an ipod later on.
Please do your research on Alpine USB and HDD sources. Alpine doesn't quite have USB implemented like Pioneer or JVC
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Old 15th July 2008, 10:45   #8379
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Originally Posted by gunbir View Post
Please do your research on Alpine USB and HDD sources. Alpine doesn't quite have USB implemented like Pioneer or JVC
Gunbir ji, please explain. I tried to do some research. The following is from Crutchfield:
9884:
USB Adapter Ready:
With the optional KCA-620M USB adapter (item number 500KCA620M), you can connect and control MP3 players that have USB connections. In addition, if you have MP3s stored on a USB thumb drive, you can select and play those files from the head unit.

9886:
USB:
Using the rear panel USB port, you can connect and control an audio device with MP3, WMA, or AAC files and a USB jack. The female Type A USB port is located on an 8" pigtail.

This means I can use a pen drive/USB HDD right?? I have to buy the adapter thingy na? Or, will connecting an ipod be easier? The current ipod Classic 80GB would work kya?

I've never used the ipod and have ZERO idea.
Thanks in advance.
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Old 15th July 2008, 11:33   #8380
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Quote:
Originally Posted by shuvd View Post
Gunbir ji, please explainplease.
Pio and JVC have a USB socket on the front panel itself no need for a pigtail.
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Old 15th July 2008, 15:47   #8381
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Default paint/pigment for fiberglassing

I have a quick question about the colours used while fiberglassing.Can i mix with the normal metallic paint with polyester resin.(i have one can of com-paint)

Last edited by mohang_j : 15th July 2008 at 15:51.
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Old 15th July 2008, 22:53   #8382
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Quote:
Originally Posted by navin View Post
Pio and JVC have a USB socket on the front panel itself no need for a pigtail.
Navinji - I think you meant this for some particular models. I am saying this because some models of Pio have USB at rear panel. For eg 4050. The pigtail is no bad as there's no cables hanging infront of HU. Also, a pen drive plugged on the front is not safe when you have kids . I have put the pigtail end in my glove box. I can connect a pendrive/HDD inside the glove box and close it which makes the HU front panel clean and no hanging wires.
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Old 16th July 2008, 11:38   #8383
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Originally Posted by mohang_j View Post
I have a quick question about the colours used while fiberglassing.Can i mix with the normal metallic paint with polyester resin.(i have one can of com-paint)
Any non-polyester material will cause porosity in the resin and reduce strength and density. This is OK for decorative purposes (lamp stands and shades, etc.), not for your woofer box. With solvent based materials, the solvent will not get a chance to evaporate. You could try small patches / panels to check the results.

Check on Youtube for FG work - there are lots of instructional videos where the first layer (the layer that ultimately gets exposed to the outside) is base material that comes out all shiny.
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Old 16th July 2008, 12:31   #8384
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Hi,

I am planning to get a JBL CS300.1 amp (300w @2ohms) (still available). I need to select a sub that will go well with this amp, to be installed in the spare wheel well.

a) Should I look at any particular variety of subs considering it will go into the wheel well.

b) Would the JBL GTO1204D (300w @2 ohms) sound good if installed in the wheel well?

c) Please suggest any other good sub for this location.
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Old 16th July 2008, 14:33   #8385
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@Ketchup. What car are you planning to do the spare wheel sub install in?
And what's your maximum budget for the sub and install?
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