Tb W4-1052sa - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Multi-Way Conventional loudspeakers with crossovers

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 17th July 2004, 03:10 AM   #1
smbrown is offline smbrown  United States
diyAudio Member
smbrown's Avatar
Join Date: Jun 2004
Location: Portland, OR
Default Tb W4-1052sa

I've seen recent threads on these. I picked up a pair that arrived from Parts Express just the other day. Today I stuck them in a BR box that is 980 in3 and has a 2.5" x 0.75" vent. I put about 25% stuffing in it. So far they sound pretty good, but a couple problems and I'm looking for some help. When I play my test CD and measure the SPL from sitting position, I get nice and flat down to 63 hz, and 50hz is -7 db. So the bass is not too bad. The top end seems to have good presence and is all there without too much harshness. But the problem is in the lower midrange. I get a bit drop out between 250 and 400hz. We're talking about -5 to -8 db. This causes everything to sound kind of thin. Any ideas about what I might tweek? There is no BSC at this time but I think that might just make it worse. Sure appreciate any ideas you all might have -- these seem to have lots of potential. Not as airy as the Fostex's I've tried, but much better impact and bass. Thanks,
  Reply With Quote
Old 18th July 2004, 02:49 AM   #2
smbrown is offline smbrown  United States
diyAudio Member
smbrown's Avatar
Join Date: Jun 2004
Location: Portland, OR
Well, having seen no replies, I took matters into my own hands. I remodeled the Tang Band W4-1052SA's on WIN ISD and ended up with a box that is 620 in3, and a 2" by 5" port. I also added a bit of BSC - just a 1mh + 4ohm resistor I had laying around. Later I'll see if that's even in the ball park.

My mid bass problem is much better and the speakers easily get down into the 50's now. Wow, great imaging, very nice dynamics. I still think the Fostex's I've heard are a bit faster. But these seem to have smoother treble than some of the Fostex I've had and don't seem to need hundreds of hours of break in time.

So far I'm pretty impressed with these little guys!
  Reply With Quote
Old 19th July 2004, 08:47 PM   #3
MarkMcK is offline MarkMcK  United States
diyAudio Member
Join Date: Aug 2003
Location: Ohio
Go to:


There is more information there about this driver.

Too much treble will also cause a loudspeaker to sound "thin." The 1052 has a bump shelf in the low to mid treble that must be equalized. Your "BSC" is close, but not ideal.

Also, the 250 to 400 Hz problem may be room or location. It could be a box problem, but in quasi anechoic testing I have never seen a problem in this range with this driver in comparable sized boxes.

Data base searches are not perfect, but if you search the "1052sa" the other thread will appear.

  Reply With Quote
Old 19th July 2004, 10:01 PM   #4
diyAudio Member
Join Date: Jan 2004
Location: Toronto, ON, Canada
Give MarkMck's 1052 mods a try (found in the thread he linked to). Unfortunately, mod #2 hasn't been posted on his site yet.
  Reply With Quote
Old 20th July 2004, 03:05 AM   #5
smbrown is offline smbrown  United States
diyAudio Member
smbrown's Avatar
Join Date: Jun 2004
Location: Portland, OR
Default A bit more help?

Thanks for the thread reference. I changed my BSC to the filter shown by MarkMac (don't know if you'd call this BSC with the added cap so correct if I'm wrong). At any rate, even without the glue modification it sounds and measures much better. I am still getting the big drop around 400 - 500 hz, however. Wondering if it was room placement (my box is rear ported), I moved it closer to the back wall. Seems to not make much difference - I tried it about 2' and at about 4'. The latter sounds much better for sound stage. I just picked up a bottle of Gem Tac at Michael's, a crafts store. I'll give it a try as well.

I had my son listen to these, he has much better HF hearing than I do now. He heard a bit of upper treble tizziness. About a handfull of more stuffing behing the driver cured this without making the box sound overstuffed. Any other ideas on the 400 hz dropout (still about -7 db) would be appreciated. Box is currently 626 in3 with a 2"x5" rear facing port.
Thanks a bunch!!
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Tb W4-1052sa edjosh23 Full Range 79 24th April 2008 04:15 PM
TB W4-1052SA in OB? 00600 Multi-Way 6 15th September 2007 05:38 AM
w4-1052sa modifications dgoodier Full Range 1 18th February 2007 12:31 AM
W4-1052SA vented raul_77 Full Range 6 12th April 2005 02:11 PM
MarkMcK's TB 1052sa Mod #2 bwbass Multi-Way 4 9th January 2005 05:19 PM

New To Site? Need Help?

All times are GMT. The time now is 05:10 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2