Tang Band W5-1138SMF 5-1/4" Subwoofer - Specs all over the place?
Hi, I got a Tang Band W5-1138SMF subwoofer for a project of mine. I proceeded to measure the free air parameters with DATS V3 and I got completely different results from the specs.
First of all the Fs is reported by DATS at 65HZ instead of 45HZ from the specs. Then all other parameters like Qes, Qms, Qts are also different from the official specs. Do you think I got a bad unit?
Hi Nick, thanks for replying mate. I do not know what you mean by the vent pole being of the ground. I just placed the speaker on a table, firing side up, connected the DATS clips to the terminals and proceeded to measure the open air properties. Should I have done something differently?
No worries. having it completely on the table might be part of the problem. If you look at the back of the subwoofer, you will notice a hole in the magnet. This is the vent. You typically want that off the ground, unobstructed about 1.5". You can use anything to lift it off the ground. just make sure it is supported on both sides without anything covering the center. Here is a video I queued up for you that should help.
Thanks, I repeated the measurements as advised, no change at all. Guess I have a bad unit then.
Also make sure if you are using DATS V3 you have the correct revision selected: https://www.trueaudio.com/dats/downloads/DATS%20V3%20Quick%20Start.pdf
DATS is fine, I have the one with the H mark at the bottom. Also measures other speakers within specs, so I have an indication the installation is ok and everything is working as it should. I will try the break in suggestion as you recommended. Thanks again.
Further reporting, the burn in session I performed did not yield any improvement in the drive. Furthermore, I purchased a second similar unit from a different supplier for putting my mind at rest, and guess what! The second drive also had similar bad measurements in DATS, especially the Fs which in this case registered at 59HZ not even close to the 45HZ advertised by Tang Band in their specs!
So based on my experience on buying two different similar speakers from different suppliers and both measuring bad either (a) Tang Band has very bad quality control, or (b) it lies on the advertised specs to push sales, or (c) it sells at discount the speakers that do not pass quality control to dealers which subsequently sell them to innocent consumers without a reference that they are buying a defective product.
I do not care if (a), (b) or (c) is true, or all of the three, but in any case Tang Band is not a brand I will ever trust again as a consumer. I plan to post a video on youtube to expose their shortcomings as a brand.
Thanks again Nick for your help. really appreciated.
You're Welcome. Although I must admit I think you got a bad batch or there is something off with your testing equipment. I use the W5's often and they have always been close to their specs. I just pulled one I had in stock to remeasure it to see if something had changed, but mine measured normal. Yours are way off, which is why I am so confused.