An Objective Comparison of 3in - 4in Class Full Range Drivers

[tuxedocivic]

Thank Dave, a lot better: http://www.diyaudio.com/forums/full...-class-full-range-drivers-45.html#post4239665

It looks like there are some note-worthy discrepencies. Considering Zaph's measurements are so close to the factory graph, I have some concern with the rest of the data.

 

[planet10]

LMS isn't available since 2010?

So what? It still works and is industry standard.

dave

 

[Scottmoose]

For reference, the majority of manufacturers based in the Far East use LMS v.4 to measure FR, impedance data. I believe there is a gradual move toward LX500, Clio and other systems.

 

[pnix]

Which raises the rather significant question of why you only appear to whine about anything and everything from a single manufacturer.

You cannot provide that information for the large number of other companies I listed, so by definition, you are not in a position to continuously misrepresent one as being worse in this respect than others.

MA data is worse. Compare to Tymphany data for example. Showing a frequency response on a scale going from -10 to +110dB makes any curve look good.

By the way, people arguing that nothing would be wrong with the way the MA data is presented keep the discussion going. If someone would claim that there's nothing wrong with the way Fostex presents their data I would respond in the same way. There is just nobody doing just that.

 

[pnix]

So what? It still works and is industry standard.

dave

Please also address my other questions.

Which IEC baffle?
What size is the anechoic chamber? What is its lower cutoff? Has anybody ever seen that anechoic facility?
What excitation signal was used?

 

[tuxedocivic]

The Fostex data is actually pretty accurate IME, though their scales are awful and really smooth it out. But if you look close enough, it's bang on. Only two drivers is my experience though 😉

 

[Scottmoose]

MA data is worse. Compare to Tymphany data for example. Showing a frequency response on a scale going from -10 to +110dB makes any curve look good

-I clearly stated I offer no opinion on any manufacturer response data.

-I am not discussing manufacturer response data with you, or anybody else here.

-You complained that MA does not provide sufficient information about their measurement / test equipment.

-Since you claim said information is inadequate, you must now support your implication that it is inferior to those of other manufacturers by providing your detailed information about the equipment employed by Vifa, Tang Band, Fostex, Scan Speak, SB Acoustics, HiVi, Dayton, PARC audio, Jordan, EAD, Supravox, PHY, AER, Lowther, Voxativ, Aurasound, Peerless, Fountek etc. If you do not do so, or claim they are all as bad, then you must explain in detail why you refrain from passing remarks about them, and direct your entire attention to that provided by a single example.

 

[Cal Weldon]

Everyone! And I mean EVERYONE. Stay with the subject of the thread. Stay away from personal comments. This is the last warning.

Sorry iko, I gave them that chance back in post 462. It's time for a cool off period. Thread closed while we discuss its future in the backroom.