Beyma TPL-150 and RAAL 140-15D

Loren42 · 4th June 2011, 01:16 PM

I am in the beginnings of spinning a two-way design and one of the problems is finding good transducers that meet the low end requirements and a good mate for the higher frequency requirements.

Typically, this means a pretty low crossover frequency of about 1 to 2 kHz.

Normally a compression driver is the answer, but...

The Air Motion Transformers made by Beyma and RAAL seem like they might make a very good alternative with reasonably high sensitivities. I would like to mate these to a pair of Acoustic Elegance TD15H drivers I have sitting idle at the moment.

These would be used for home HiFi, driven by my 50 WPC tube amp.

The downside is the expense, but are these drivers really worth their salt?

They seem intriguing and I would be interested in hearing other people's experiences with these drivers.

_henry_ · 4th June 2011, 02:11 PM

i too have plan to acquire this next year. TPL-150H that is.

i have seen nothing but praise for this amt horn.

cheers
henry

Loren42 · 4th June 2011, 02:19 PM

Quote:

Originally Posted by _henry_

i too have plan to acquire this next year. TPL-150H that is.

i have seen nothing but praise for this amt horn.

cheers
henry

Yes, but I have not seen too much in the way of actual construction projects using it.

It's been around for a while and it would be good if there was more information and design tips. I am not that much of an expert at being on the tip of the spear on this one. Easier to follow a beaten path.

Dynaudio4way · 13th September 2011, 01:04 PM

Next year (allegedly) Beyma are launching an updated version of TPL150/H with larger magnet assembly for higher BL factor (thus improved sensitivity) and also new diaphragm material which can handle approx 40% more heat disipation / watts power handling. I believe there will be two versions, and they will have the same basic size / geometry as the existing model (ie. same 5 inch ribbon size - just more output - with the same original 230mm square aluminium horn mouth) so should be a simple replacement upgrade from any existing TPL150 models, without needing to saw a new baffle hole or anything. Hopefully prices for new models should be reasonably similar to existing model, however that could end up becoming quite expensive by next year anyway because cost of neodymium is currently going up and up every month, hence Beyma's recent launch of several new ferrite versions of some of their existing neo drivers.

pinkmouse · 13th September 2011, 02:52 PM

Thread moved to more appropriate area

4th June 2011, 01:16 PM	#1
Loren42 diyAudio Member Join Date: Sep 2008 Location: "Space Coast" Florida, USA	Beyma TPL-150 and RAAL 140-15D I am in the beginnings of spinning a two-way design and one of the problems is finding good transducers that meet the low end requirements and a good mate for the higher frequency requirements. Typically, this means a pretty low crossover frequency of about 1 to 2 kHz. Normally a compression driver is the answer, but... The Air Motion Transformers made by Beyma and RAAL seem like they might make a very good alternative with reasonably high sensitivities. I would like to mate these to a pair of Acoustic Elegance TD15H drivers I have sitting idle at the moment. These would be used for home HiFi, driven by my 50 WPC tube amp. The downside is the expense, but are these drivers really worth their salt? They seem intriguing and I would be interested in hearing other people's experiences with these drivers.

13th September 2011, 02:52 PM	#5
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	Thread moved to more appropriate area __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

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4th June 2011, 02:11 PM	#2
_henry_ diyAudio Member Join Date: Jun 2002 Location: Indonesia	i too have plan to acquire this next year. TPL-150H that is. i have seen nothing but praise for this amt horn. cheers henry

13th September 2011, 01:04 PM	#4
Dynaudio4way diyAudio Member Join Date: Jun 2011	Next year (allegedly) Beyma are launching an updated version of TPL150/H with larger magnet assembly for higher BL factor (thus improved sensitivity) and also new diaphragm material which can handle approx 40% more heat disipation / watts power handling. I believe there will be two versions, and they will have the same basic size / geometry as the existing model (ie. same 5 inch ribbon size - just more output - with the same original 230mm square aluminium horn mouth) so should be a simple replacement upgrade from any existing TPL150 models, without needing to saw a new baffle hole or anything. Hopefully prices for new models should be reasonably similar to existing model, however that could end up becoming quite expensive by next year anyway because cost of neodymium is currently going up and up every month, hence Beyma's recent launch of several new ferrite versions of some of their existing neo drivers.

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