Beyma TPL-200 felt pad removal?

spladd1ct

Member
2015-04-07 4:41 am
I am running a pro audio set up in the back of my truck for outdoor event (car shows) pro audio use.

I will be running 8 beyma 12p80nd v2's and 4 beyma tpl-200h.

I understand from reading on forums that removing the felt pad and instead loading the horn into a larger damped rear chamber can further reduce distortion dramatically.

I was wondering if this would be beneficial for me in my particular application.

Thanks in advance fellas.
 
For the TPL-150H:

As far as I can remember, removal of the felt reduces second harmonic distortion which isn't very audible. Removal of the felt also decreases damping of the resonance at 1.6kHz significantly, causing a response peak. This may be more audible than the reduction in second harmonic distortion - the manufacturer obviously obviously added the felt for a reason.

I think the same applies to the TPL-200, except that the resonance at 1.6kHz seems to be better damped to begin with.

I would not want an underdamped diaphragm for a high power application. Perhaps better to measure and see what you get.
 

mpa

Member
2010-03-25 9:19 pm
UK
This is exactly what I did with my TPL150's and IMHO it does make a significant difference. It also creates a peak at approx 8Khz that needs EQ to tame though.
Great drivers though, I don't think they have a 'sound' as such, they don't 'shimmer' or 'sparkle' they just sound 'right' to me..
 
[IMGDEAD]https://lh3.googleusercontent.com/rc73-KkQO2Jk3Z3Kc3EW__Te-LGMdXqLDZzeQHPzsHPNq0sKNp_qrYmjzsn5EaTMOby-H5KNVl5MsK4W3WSuHmBJMg5KuXtMmudsMRqvvelkGWw0jUc4NM4uhjEubqEZ16edO0gJZdIBja_QTQWvTrcIf68ozOnBENiTF8ZE9MrPPpuAYgfefXG3HHS5sa6NysMpegaqBkfdg-_pCS1I7xbCsYyQFuxsmH2qckYNG_QtXhs45RKiW6aaP3NAsKUmkPTfVYsWWxlJoMbPncxo5LSKRFbz2RWvNQJKsjpP6ABinHi4wvrKGT8AIm6rTH0k1Ov7XUqSiypW19iR8HwhxV9Em0aZWT2qMX94Ooj6aDS7lAAX7uQT_pphCRmMdoA-i1FuNPI7M_tjnmhgwdJ_noKwj_4Z_mqDHiPLb-hYYL_aP8oXOMPmVcOlyxhVf8GsTEN7JoneLmu2eynSp-_glcIhSOAv37QUuRpEmh_10dTcp7k7WXJLstUG09fSyd3cYmExb1FmVKxWe8qHC0RqvASpMVoxhfTkIvYIBaN5o6xdQ5h_Sst-UuzDNGQnnXPOfYyk=w595-h297-no[/IMGDEAD][IMGDEAD]https://lh3.googleusercontent.com/ylmatdLHC4mU6R0WuCIlG_c0D8TAbEKOOmR9BjkwA0SwFoewMVsiDhbgQdZoFhdiHP0l7ThruRTEix6RBQPTFBdJqwdPGf4MBHPEoNLJGmfE_cIUcvVPaYPvZVWv4qYIrGUTk27Zv3VIlinJbMK04wjQq9Uq1mgdC-g2L_T7Bc3ZWHygWbVuhTzlVOJVHqTF5_C7XsqQE4bjeem8OUvm8QgSHt_wv-IMhL0CJhaiHkCqEN1Gj6bOZXIEfgO2hPmDFEyAw4KRRaBpOaWAqcjE1KVHTexT7_-KzhCtEl0jgMZaQ0C0620MnY1nr99el2moJBENFX3uh431vHkuRLWgW_e-BBKXVII02LzMZKenW47TtcPOJh2ww_qClfeGB0ZfthGdnz1igtZsk1c91jvdvvT55L072IQI5ao9Vtg1di52m0ENuAPxisQxpr0lgrFnRNoYMYWIUMygOTuw0y32aYioSqJvWcQGfC-H9Xz8kk2sBJhh9HPzNOnWhKRMnaqDAIfKohHUSXLQ-M9xNEJCotwgKVAnytbOUJWZmqo7CJ0a3LSszIwWFhLZtSCgSJbCozGy=w549-h380-no[/IMGDEAD]
 

manninen

Member
2014-07-16 7:49 pm
[IMGDEAD]https://dl.dropboxusercontent.com/u/33080121/hifi/steelisreal/tpl.jpg[/IMGDEAD][IMGDEAD]https://dl.dropboxusercontent.com/u/33080121/hifi/steelisreal/200.jpg[/IMGDEAD]
sorry to ruin 1/10 tpl threads on diy audio.
find any similarities on my room measurement compared to factory sheet?