Rerurn to Romy the Cat's Site


In the Forum: Horn-Loaded Speakers
In the Thread: Horn speaker with dipole bass?
Post Subject: To Romy regarding dipolesPosted by Vasyachkin on: 3/8/2010
fiogf49gjkf0d
 Romy the Cat wrote:
I do not exactly understand what you are proposing at DiyAudio site.
i can't log in to Diy Audio so i can't view the attached image ( diagram ) files there - can you view them ?  without diagrams it would be really hard to understand.  but basically it was a motor design for a ribbon that is symmetrical - half the motor is in front and half is in the back of the ribbon.  the motivation was to optimize field geometry but a side benefit is that it can be used as a dipole.  there may be some confusion because i redesigned it twice so there were at least three threads about it.  if there is interest i can do a more coherent ( not broken up into 3 pieces with some fallacies in part 1 and 2 ) write up on my own site.
 Romy the Cat wrote:
I have generally an attitude against dipole radiation, and particularly in bass. There is a common believe among audio people that dipole bass has advances, there was a lot of said and written about it and there were many objective (perfectly verifiable) rationalizations brought to support this point of view.  I am familiar with all of them and I also hear a number of good dipole bass systems.
ok.
 Romy the Cat wrote:
I do feel that the people who support dipole bass are clueless and do not know what is important and what is irrelevant.
it is possible.
 Romy the Cat wrote:
Their arguments that dipole bass is able to self-EQ the room’s modes sound laughable to me.

because you don't agree or because you think it is irrelevant ?
 Romy the Cat wrote:
The dipole bass, with very characteristic water-down texture never was sounding right to me. This is one of the reasons why I never appreciate the open baffle designs….
i don't think there are too many people who understand what it takes to produce a good dipole bass section.  it is possible that the reason dipoles sound "watered down" to you is that wrong drivers are used or the system is not big enough.

on the other hand it is also possible that the "watered down texture" is due to dipole radiation pattern itself and there is simply nothing that can be done about it in a dipole.

i recently listened to some older Martin Logans and they did sound cold, lifeless and "extra-terrestrial" - i don't know if that is what you mean by "watered down."  if yes then it may be a matter of personal preference as well as music choice.

it is quite possible that the brain has expectation of certain "colorations" such as room reflections or harmonic distortion, which when missing may sound disturbing.  at least that's my theory regarding MLs.  if so, then it MIGHT go away with time as your brain gets used to the speaker - or it may not, considering that in the studio the track isn't mastered on dipoles.
 Romy the Cat wrote:
In contrary, at higher frequencies dipole might work fine, but no in bass.
at high frequencies my ribbon would have the advantage of a "baffle-less" design too.

Rerurn to Romy the Cat's Site