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Old 31st August 2012, 02:10 AM   #1
weiyan is offline weiyan  Hong Kong
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Default China made 4" fullrange advise wanted

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Sorry for the description is Chinese. You could look at the picture.

Power range: 60-100W
Frequency: 55Hz-25KHz
Impedance: 4 Ohm
Sensitivity: 89db/W
Dimension: W(158mm)*H(265mm)*D(245mm)
Weight: Around 12KG/pair

Really deep base not need, for I believe better pair with sub woofer if I want the deep low base.

I concern the performance above 80hz, may be 100HZ + .

Thanks for advice.
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Old 31st August 2012, 02:19 AM   #2
GM is offline GM  United States
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I am not sure what type of advice you want, but with no T/S specs we can not help with a box design unless some one here has experience with this driver.

GM
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Old 31st August 2012, 02:36 AM   #3
weiyan is offline weiyan  Hong Kong
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I may buy one. My concern is the bass is so powerful as the users comments said. I am comparing with a peerless 5" two way speaker.

I think the sense of "full powerful bass" is usually come from 70-115Hz. So I concern this frequency.

Another concern is I am using a class B amp with regulated power supply. The psu impedance may too high for 4 Ohm speaker.

I am sorry don't have spec. of the speaker. Hopefully there may some user has experience with this speaker.
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Old 31st August 2012, 03:01 AM   #4
GM is offline GM  United States
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If you say so. I didn't try to Google translate the page. The response plot shows a high Q peak around 110 Hz, but do not know if it is because it has a high Q motor or it was measured in a too small box.

Maybe best to just make/use a sealed box as shown and XO it to a 'sub' system around 70-80 Hz. If the little box sounds too 'strong', then vent it to lower its tuning.

GM
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Old 31st August 2012, 03:58 AM   #5
borispm is offline borispm  Hong Kong
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Weiyan,

Here are a few easy tips:

If the midbass is too strong, you can try to position further away from the rear and side walls. I would put them on taller stands too.

You may also want to plug the port with a foam or rubber bung.

Try to use an amp that sounds "lean", say small T-amps, instead of "warm" sounding ones.

Hope that helps.

Boris
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Old 31st August 2012, 06:18 PM   #6
tvrgeek is offline tvrgeek  United States
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4 inch and "powerful" bass does not match. Lack of high frequencies that give it a bias to the lower hundreds does. IMHO, trying to fix a bad speaker with problems in the many percent range with differences in amps in the .00 something range is useless.

4 inch and 100 Hz is a reasonable target IF the driver was made to do that and IF the room is not too large and IF you don't play it too loud. I am not yet convinced a 4 inch driver is usefull at all above about 8000 unless augmented with a wizzer cone with all of its problems.

The specs above are wishful thinking on the manufactures part.
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Old 31st August 2012, 06:20 PM   #7
tvrgeek is offline tvrgeek  United States
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Look at their frequency plot! Terrible!
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Old 31st August 2012, 08:06 PM   #8
ODougbo is offline ODougbo  United States
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I wouldn't go smaller than 5", if you are looking for some bass.

Peerless makes some really nice drivers (post #3) , why not go back to them?
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Old 31st August 2012, 10:07 PM   #9
fakeout is offline fakeout  Canada
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Uh, I have a pair of 4" Visaton R10SC full range drivers and when I cranked them up just to hear on a Lepai 2020A+ amp, I wasn't blown away by the bass regardless how low these go. Even if it wasn't in an ideal cabinet.
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Old 1st September 2012, 02:14 PM   #10
weiyan is offline weiyan  Hong Kong
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Thank you for the advice. Its better to keep away from this speaker.
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