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Old 1st February 2013, 09:31 AM   #61
holtet is offline holtet  Norway
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Quote:
Originally Posted by sweefu View Post
Very good feedback here

I am planning to use the W3-1878 in small sealed enclosures on the dashboard of my car. I am hoping I will not miss having a tweeter, I hope these will provide all of the high end detail. They will be mounted directly on axis to the driver, and being in a car there are a lot of reflective surfaces to worry about, so reflections are difficult to deal with.

How low are you playing these?

Thanks!
I think these could work very nicely in a car. But I'm not sure how big a box you can fit on the dashboard? I would try simulating it to see how low they will go. Maybe it'd be better to just mount them directly in the dash without a box and filter away the lowest bass below perhaps 100-200hz. Playing upwards and reflecting the sound from the windshield should give enough highs I'd guess.

I play them as low as they go. I'm not sure about the numbers, but will try to make some measurements this weekend.
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Old 1st February 2013, 10:25 AM   #62
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Quote:
Originally Posted by holtet View Post
I think these could work very nicely in a car. But I'm not sure how big a box you can fit on the dashboard? I would try simulating it to see how low they will go. Maybe it'd be better to just mount them directly in the dash without a box and filter away the lowest bass below perhaps 100-200hz. Playing upwards and reflecting the sound from the windshield should give enough highs I'd guess.

I play them as low as they go. I'm not sure about the numbers, but will try to make some measurements this weekend.
Thanks for your help.

I might be able to get around 0.75litres at a guess, I haven't been able to measure properly yet but will be around that. I will be able to mount them directly on axis to the driver, so with some luck this will take advantage of the highs, as much as the driver can offer.

I am happy to cross them around 350hz ideally, I'd prefer low but this won't be possible in the small enclosure.

This is modeled in a 0.75 liter sealed enclosure with some stuffing, as you can see it's -1.7dB at 353hz
Click the image to open in full size.

Any measurements you might have would be fantastic!

This is not the only speaker I am considering, also the Fountek FR88EX and Tang Band W3-315E
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Old 1st February 2013, 05:34 PM   #63
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A guy won the Norwegian championship (audio quality) using the w3-871 (dash mounted) and the w6-1139 in doors. Don't remember the amp or xo but I think it was around 150 Hz...
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Old 14th September 2014, 09:02 PM   #64
aarvin2 is offline aarvin2  Mauritius
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Join Date: Sep 2012
Hi guys I have been experimenting with the 1878 for sometime, so I thought i'd share some little info which might be useful to some people

It sounds very harsh and peaky when you just started to use it ... give it its time(couple of hours) and the sound will get smoother and nicer

Don't expect it to play a lot of bass (lots of excursion) or you shall get some ugly stuttering mids and highs. Like some friends said here, it's much better with a HPF at 100 Hz or more.

You can get a bassy sound with less definition and details or opt for a less bassy sound with more articulation and details. More than 1L for bassy sound and less than 1L for more detailed sound (sealed).

This speaker sucks when coupled with ordinary amplifiers but really shines with quality amplifiers which have lots of juice to spare. This is obvious I know but the contrast is quite big. Some speakers still sound ok with ordinary amps, but not this one.
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Old 15th September 2014, 03:53 PM   #65
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Depending how close the speakers are ot the windhield the kick panels may be a better location. Equalize path lengths for improving image stability.

Having used kick panels im a convert.
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