How's this sound for 8" components - diyAudio
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Old 30th April 2004, 04:40 AM   #1
fivaxis is offline fivaxis  United States
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Location: Phoenix AZ
Default How's this sound for 8" components

Well there's hardly any 8" components available so this is what I am thinking of

http://www.partsexpress.com/pe/pshow...=297-310&DID=7
+
http://www.partsexpress.com/pe/pshow...=264-590&DID=7
+
http://www.partsexpress.com/pe/showd...number=260-144

Does this sound like it would go together well?
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Old 30th April 2004, 08:02 AM   #2
sreten is offline sreten  United Kingdom
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The crossover should work in car if it allows for typical inductance,
also an L-pad may be needed for tweeter level adjustment.

However mounting the 8" bass unit correctly is not trivial.

TBH I can't the rational for going for an 8" bass + tweeter over
a high quality pair of 6.5"/7" + tweeter and all the mounting bits.

And you get a 4 ohm system rather than 8ohm that will extract
twice the juice from your presumably 4 ohm capable amplifier.

I've nearly always found extra padding on the tweeter useful for
in-car component kits, tweeters are nearly always set too high.

This is good value :

http://www.discountave.net/kfke7miand1t.html

But with 6.5"/1" you can almost name your price, for your budget :

http://www.discountave.net/16foac65.html

looks good.

sreten.
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Old 30th April 2004, 02:00 PM   #3
fivaxis is offline fivaxis  United States
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Really my only concern is tweeter to woofer level. Mounting will be no problem, I have plenty of room in my doors - they have 6x8 holes, just needs a little trimming to fit 8s.

It's really hard to get any decent bass out of 6.5s in a door.
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Old 30th April 2004, 02:53 PM   #4
Lusso5 is offline Lusso5  United States
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Default Good info

I'll let you in on some good info.

Dynaudio was contracted to build a custom system for the Volvo C70. The drivers are pretty close to the standard Dynaudio Mobile drivers. I used to own a C70, so I know the system well. It consisted of a System 360 3-way up front:
MW170 8" woofers, MD140 3" Dome mids, MD100 tweets.
And a system 260 2-way in the rear.
MW170 8" woofers, MD100 tweets.

The woofers had redesigned baskets to make the a little more shallow, to fit, and the tweets have funky mounting brakets, but the rest of the driver is all classic Dynaudio - 3" Hex VC in all.

Here is the best part - you can get these drivers for a fraction of what they cost in the audio stores - about half.

www.volvopartsworld.com is a great source for wholesale prices. Make sure to tell them you want the internet parts price.

The 8" Dynaudio is a great driver, and has great HF extension, and smooth roll off. If I were doing an 8" two-way, I would use this driver.

I disagree, that you cant get good bass out of a 6.5-7".

I just built a component set for my car with the Morel MW-168 (4ohm), which is a 6", and the Vifa D26NC05 (6ohm), and it is very good bass extension. (FR plot below) E-mail me if you want the x-over schematic.

Trust Sreten's comments about the padding too. I needed 6db of attenuation on my tweeter in the above referenced system.
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File Type: jpg morelvifa_resp1.jpg (44.4 KB, 198 views)
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Old 30th April 2004, 08:45 PM   #5
sreten is offline sreten  United Kingdom
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Quote:
Originally posted by fivaxis
It's really hard to get any decent bass out of 6.5s in a door.
Well the laws of physics indicate otherwise, and if the total door
volume available for the driver is limited, smaller units will have
more extended bass, but lower sensitivity and maximum levels.

sreten.
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Old 30th April 2004, 09:01 PM   #6
fivaxis is offline fivaxis  United States
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The only time I've had 6.5s put out decent bass, they were in a tiny tiny enclosure sealed into the floor. A door is a huge enclosure that would in no way limit the lower frequency excursion of an 8" speaker.

Click the image to open in full size.
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