THAM10 a very compact 10" TH 
Sunday, March 6, 2011, 22:42
Posted by Anders
finally, after having had some 25 different designs drawn up, simulated, debated and reviewed I now present my final proposal.

This is my suggestion for a very compact, lightweight and capable 10" loaded tapped horn which should provide well from 50Hz and up in real world conditions.

Many thanks to Johannes Rodin for providing good ideas and valuable insight, his help in my designs to date (THAM6, THAM15 and now THAM10) is a big part of the end result.

This is the THAM10 :


Part 1 of the drawings



Part 2 of the drawings



The hornresp input data


The cone excursion at 1W (and approx. 100dB output)


The SPL graph in 2PI (halfspace, flat on open ground) and 1W.

The following simulatons are made in a 1PI environment, I will not judge these simulations, that is best left to the potential DIY'er.


Loaded with the B&C 10MD26 and placed along a wall, 1W, 1m.


Loaded with the B&C 10PS26 and placed along a wall, 1W, 1m.


Loaded with the B&C 10HPL64 and placed along a wall, 1W, 1m.


Loaded with the B&C 10NDL64 and placed along a wall, 1W, 1m.


Loaded with the Beyma 10G40 and placed along a wall, 1W, 1m.


Loaded with the Beyma 10LW30N and placed along a wall, 1W, 1m.


Loaded with the RCF L10-750YK and placed along a wall, 1W, 1m.

My previous designs all provided approx. 10Hz lower low frequency drop off corner in reality then the simulations showed, and with that in mind I have no difficulties thinking this design should be capable of useful response from 50Hz.

They should be (must be) processed with a low frequency cut of filter set at minimum 40Hz, preferably 50Hz, and with a slope of 24dB/Oct for safe operation at higher levels, the upper cross over point may be set as the user feels appropriate at each given situation.

Designed with the B&C 10NW64 in mind, a lightweight neodynium woofer, these small boxes should be easy to handle, and easy to transport, the amount of power the THAM10 will safely handle is yet to be determined by real world use.

Intended for use as bass speakers in small live acts where sub bass is not required, and space is limited, they should be able to surprise in a positive way with regards to sound pressure level given their size and weight.

Questions regarding other suitable drivers will not be answered, try simulating them yourself in hornresp using the data provided above.

BUILD PICTURES :










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