Am I the only person that DIDN'T like their B20's ?!? - diyAudio
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Old 26th June 2008, 10:43 PM   #1
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Default Am I the only person that DIDN'T like their B20's ?!?

Well ?







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Old 26th June 2008, 10:56 PM   #2
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Default Re: Am I the only person that DIDN'T like their B20's ?!?

Maybe if you added more information it will aid us in discovering why you DIDN'T like them...

Personally I love mine, they aren't very detailed but pair them with a small tweeter and they are very listenable for long periods of time. No fatigue whatsoever...

Did you add a super tweeter? What cabinet did you place them in? OB?
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Old 27th June 2008, 01:20 AM   #3
gychang is offline gychang  United States
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Default needs a super tweeter.

no complaints, agree no listening fatigue.

Click the image to open in full size.
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Old 27th June 2008, 01:38 AM   #4
GM is offline GM  United States
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Default Re: Am I the only person that DIDN'T like their B20's ?!?

Apparently.

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Old 27th June 2008, 01:44 AM   #5
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No.
To me they have not enough highs
to be called even ' extended range '
I have ' woofers ' that do better.

Here's a far superior product with
~ the same T/S parameters :
http://reverenet.com/prod_detail.cfm?product_id=270

specs here:
http://fullrangedriver.com/forum/viewtopic.php?id=1554
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Old 27th June 2008, 02:01 AM   #6
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Quote:
Originally posted by hitsware
No.
To me they have not enough highs
to be called even ' extended range '
I have ' woofers ' that do better.

Here's a far superior product with
~ the same T/S parameters :
http://reverenet.com/prod_detail.cfm?product_id=270

specs here:
http://fullrangedriver.com/forum/viewtopic.php?id=1554
How much money? No posted FR graphs?
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Old 27th June 2008, 02:49 AM   #7
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I did not like them either until i added a super tweeter. Maybe the best thing about the B20, besides price, is lack of listening fatigue. I listen to my pair all day at my office at low volumes and crank them up after hours - usually listening to some sort of jazz.

Every full range driver fanatic should own a pair IMO. Find a room that could use a medium sized pair of speakers and buy the SI amp and a cheap CD player or iPod to listen to. I think gychang has maxed out his B20's. I'd be inclined to call his pair B30's.
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Old 27th June 2008, 02:57 AM   #8
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>How much money?

They were ~ $17 but are discontinued.

>No posted FR graphs?

Like the biggest percentage of drivers sold,
no fancy specs or measurements for these.
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Old 27th June 2008, 03:51 AM   #9
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Hmmmm................

b20's stock ?

Yea, they stink..............

I put cotton batton behind whizzer, helped a bit...........

And I noticed it sounded much better in a qtc .577 (6ft3 box 1'x2'x3') with no stuffing than in the .707 qtc 1.75ft3 (both sealed). Less honk/echoy

I think the driver is thin (not too) so you have to design box around preventing backwave mixing with cone.

I added some eq from a 10 band equalizer, helped a bit also.....
But lost some detail..............out went the eq..........

I cut 1/4 of the whizzer off, it decreased some of the honky sound but needed more eq (think 8khz and 16khz sliders maxed)

crossed it at 5khz 24db to a piezo..........outstanding time aligned combination (the piezo resonated near 4.5khz so no spit present).

crossed it to a pair of 15's per side at 200-300hz, it sounded much worse in the mid/highs........... tough to get a cheap excellent sounding active crosover (thinking of marchand m46's though)..........


Remember you are paying $25 for an 8"
you have a bit of bass form 4 times the area of a 4" using of a ringing pipe out delayed rear horn bass.
You don't have to avoid most of your collection that'd make a 3" full range sound like it's gargling soup..............

There are a few threads on these lately...............

They NEED tweaks.......................

I'd imagine cutting the dust cap and installing is a big improvement.

Others mention some foam on inside of frame behind driver.
Others mention rope chaulk on outside of frame to dampen it.

Some even stiffen the driver with damar/puzzle coat (especially the whizzer).................

Now the main question is what is it worth ?

I think a $25 driver with 1 hour of labor (assuming free) that can compete with drivers over double the price is worth it.

Even crossing a tweeter at 10khz 6db would add sparkle and detail making the driver more fun.......... And the huge area far from normal crossovers would sound better than 6db or 24db (time/phase aligned) etc to me.


But I take the more difficult path.

I'm not impressed with someone building a good/great sounding speaker using $1,000 worth of parts.

Make a speaker that sounds 90% as good with 10% the cost, I'm impressed................
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Old 27th June 2008, 04:38 AM   #10
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http://www.diyaudio.com/forums/showt...91#post1548791




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