Pro vs hifi drivers - pros and cons?

[badman]

Originally Posted by Brett

Makes me winder how they conduct at all. Wet them down first?

I was windering that too!

In all seriousness, though, pro stuff DOES seem to do dynamics quite a chunk better. And with todays compressed recordings, we need every bit of help we can get!

[Pano]

Pro drivers are big and heavy. That's why I like them.
(also very fond of the paper voice coils)

[Cal Weldon]

Grunt!
Me like'm big & heavy
Me like'm 4" aluminum 4 layer coils and rugged composite cones.
Me like'm big horns. Big horns = Big music

Me no like'm sissy hi-fi drivers - those for my sister.
Grunt. Must go drink grog now.

Cheers.

[Brett]

Originally Posted by badman

I was windering that too!

I was pritinding to be a Kiwi. Choice bro.

[tinitus]

Actually, the plan is to build Rubanoides together with a friend
Yeah, I suppose I will use 18" woofers
In the meantime I will play with some planar designs
Pro or hifi, I have no idea, and really dont think about it

[Luke352]

Originally Posted by markus76

As 45 said, dynamics is important. But how dynamic is a driver when its voicecoil starts to glow like a toaster while playing music at 70dB SPL (listening position)?

Hope this post was on topic - don't want to be locked up alone with 45 in the Sin Bin

Best, Markus

I can confirm that this Aura driver Aurasound NS15-992-4A 15" Subwoofer NLA from Madisound when tested on a Klippel got hot enough to make the plated coating on the Neo mags actually bubble and flake off and arc out against the VC, in the process causing what looked like sparks to shoot out the back of the driver.



My only other contribution to this thread will be that although Tonality goes a great way to selling the illusion without Dynamics though it has no hope of passing off the illusion as the real thing. Dynamics IMO is probably the most important part to making the illusion seem like the real deal. Please note though that Dynamics does'nt always mean high levels of average SPL, you can have dynamics at low levels and high levels.

[MaVo]

Originally Posted by Cal Weldon

Grunt!
Me like'm big & heavy
Me like'm 4" aluminum 4 layer coils and rugged composite cones.
Me like'm big horns. Big horns = Big music

Me no like'm sissy hi-fi drivers - those for my sister.
Grunt. Must go drink grog now.

Cheers.

That made my day

And thats why i like this forum, since we dont forget to have fun with our hobby.

[Andre Visser]

Originally Posted by Luke352

I can confirm that this Aura driver Aurasound NS15-992-4A 15" Subwoofer NLA from Madisound when tested on a Klippel got hot enough to make the plated coating on the Neo mags actually bubble and flake off and arc out against the VC, in the process causing what looked like sparks to shoot out the back of the driver.

Well what do you expect for $0.00?

[Andre Visser]

Originally Posted by gedlee

I agree with this 100% and I have plans to do such a test (those who follow my posts will see that this is exactly what I have been talking about). But not having done this test, Keith is simply guessing that it is not a major factor. The only data that we have in this regard is the fact that high efficiency loudspeakers are often, if not always, described as having a more dynamic sound. It is a simple fact that they have lower thermal changes and hence resistance changes. This is very strong evidence to say that the above test would show a significant effect from thermal modulation.

So we can expect a statement like this to come out of someone's thumb?

Originally Posted by markus76

But how dynamic is a driver when its voicecoil starts to glow like a toaster while playing music at 70dB SPL (listening position)?

[Robh3606]

On the issue of dynamics I think lower efficiency drivers are simply on the wrong side of the power curve and more importantly are not designed to handle the power required for them to reproduce the loudest peaks. If they cannot do that them obviously music reproduced using them will be compressed. In addition to the driver issues lower efficiency speakers tax the amp speaker combination to it's limits much more easilly.

If you take a 85db speaker move back 12 ft you would be lucky to get 105db from the pair with 100 watts where you listen. That sounds like a rather high SPL level but it's not with a well recorded music where the dynamics are properly recorded. A snare drum rim shot could get you there in a heart beat, even playing at a more modest 85db average.

I think Earls right we need a Dynamic Linearity test to really see what's happening.

Rob