Funk Audio 8.2P Floorstanding Loudspeaker Preview

[mwmkravchenko]

There are 2 ways to find it. Taking an impedance sweep and an acoustical measurement
Look between 12 and 14 kilothertz. On the impedance graph there will be a small bump.

This is a diaphragm resonance. He notch circuit is only a passive means of Equalization. It never goes away. I listen to a pair of those everyday for 5 years.

When you increase the level being played by the driver, the notch keeps it real to position.

There is no electronic means of making a mechanical problems go away.

 

[monkish54]

There are 2 ways to find it. Taking an impedance sweep and an acoustical measurement
Look between 12 and 14 kilothertz. On the impedance graph there will be a small bump.

Thank you.

the notch keeps it real to position.

The notch does what?

There is no electronic means of making a mechanical problems go away.

Are you saying that a notch filter will equalize the mechanical resonance, but it won't truly get rid of it as it is just a passive component and not a rework of the driver?

Thanks for the info, btw.

 

[mwmkravchenko]

I'm saying that a notch filter is simply a bandaid solution. The problem is still underneath the band aid.

Tell me it ain't so.

Are you calling me A troll?

 

[cpp]

I'm saying that a notch filter is simply a bandaid solution. The problem is still underneath the band aid.

Tell me it ain't so.

Are you calling me A troll?

I thought a notch filter was used to eliminate hum

 

[mwmkravchenko]

Hum is an impedance mismatch between a components chassis ground and actual ground and potential.

You can use different means to isolate that problem.

But not getting into that one here.

Not the same kind of filter. Those electrical filters actually do their job.

The loudspeaker approach is not quite the same application.

 

[Steve81]

I'm saying that a notch filter is simply a bandaid solution. The problem is still underneath the band aid.

I won't call you a troll, but I'm curious how audible this resonance would be if the problem were taken into account and the speaker engineered accordingly, ie with a 4th order XO an octave or more below the resonance for example, especially since the issue is above 10kHz where human hearing is less than stellar.

 

[mwmkravchenko]

In the example given the problems at 13 kilohertz.

No crossover up that high.

Your example of using a fourth order crossover is valid. Because it takes a 24 decibel lowering of the problackem to make it go away in real world use.

So the choice of crossover and the point of use will very much determine the efficacy of the output. This becomes a really big problem in woofer to midrange crossover points where our hearing is acute. And in the example given just plain annoying up that high.

This is also the case in operation of a narrow band dome midrange.

We all choose our own poisons.

 

[Steve81]

In the example given the problems at 13 kilohertz.

No crossover up that high.

Your example of using a fourth order crossover is valid. Because it takes a 24 decibel lowering of the problackem to make it go away in real world use.

I think the example that pops into most people's mind are Philharmonic's offers which utilize the Neo 8. I'm not sure where Dennis crosses it over to the RAAL tweeter, but given the audible results, I'd guess he probably crossed it low enough to avoid significant audible problems.

We all choose our own poisons.

That's what makes it fun!

 

[mwmkravchenko]

I agree that Denis knows what he is doing.

The driver choices are well thought out.

And he definitely has room with the tweeter to crossover well out of the trouble region.

 

[monkish54]

I'm not sure where Dennis crosses it over to the RAAL tweeter

Certainly not 14,000hz! LOL

Dennis uses the RAAL at 2900hz. At 24dB an octave, the resonance is not even close to being an issue.

 

[dznutz]

I agree that Denis knows what he is doing.

The driver choices are well thought out.

And he definitely has room with the tweeter to crossover well out of the trouble region.

Are any of Funk Audio's products available for audition at your Perth, ON facility?

 

[mwmkravchenko]

No.

My facility is my humble home. I'm not setup for auditioning systems.

I've worked from there since I built it.

If circumstances permit I will be showing them at the next DIY Ottawa event. You can find some of that stuff on another well known DIY audio website.

 

[monkish54]

My facility is my humble home.

Is that where you make the secret sauce too?

 

[aces high]

No.

My facility is my humble home. I'm not setup for auditioning systems.

I've worked from there since I built it.

If circumstances permit I will be showing them at the next DIY Ottawa event. You can find some of that stuff on another well known DIY audio website.

I'm in Ottawa and would love some info about the next DIY meet if you don't mind.

 

[mwmkravchenko]

2010 Ottawa DIY Audio Get Together - diyAudio

Winter DIY OTTAWA MEET - Page 2 - diyAudio

DIY Ottawa winter 2013 - diyAudio

Three years running.

 

[mwmkravchenko]

Is that where you make the secret sauce too?

Only when I'm grillin on the barbeque buddy.

 

[AcuDefTechGuy]

I have not seen anything new of the 8.1P monitors on the website.

Any pics & specs?

I'm interested.

 

[mwmkravchenko]

They are getting a radical redesign.

There's a pair of the original for sale. They measure exceedingly well.

The new one will be a little bit of a change.

 

[Nuance AH]

They are getting a radical redesign.

There's a pair of the original for sale. They measure exceedingly well.

The new one will be a little bit of a change.

Can we see the measurements? Have you thought about taking a pair to the NE GTG in PA in April? It would be a great place to get them some exposure. Here is the link:
http://www.avsforum.com/t/1446450/ne-spring-speaker-shootout-gtg-date-poll-and-discussion

 

[mwmkravchenko]

Contact man with no cape.

He is the dude. I sent him measurements on Sunday.