Funk Audio 18.2 Dual 18" Sealed Subwoofer Preview

mwmkravchenko

mwmkravchenko

Audioholic
this is kinda cool. nathan doesn't rely on his own measuring from the get go? so everything (specs and data) is all done third party?
Nathan has the drivers and boxes independently measured. I provide one more level of confidence.

My first loyalty is to the truth in measurements. Above all else this has to be preserved. So if I make a mistake and post something incorrect and look like a moron...


Well it has to be fixed.

We will cautiously develop designs, measure them carefully and post the measurements. When enough of our measurements are proved to be accurate we will have a reputation that is hard won.

We are working at getting true arms length measurements. Not an easy to do without spending boat loads of cash in advertising.
 
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gene

gene

Audioholics Master Chief
Administrator
Correction to Preview Article

Based on the CEA data presented by Mark, I changed out the 134dB SPL claim to 125dB and also included the measurement info in the article as listed below:


10 hz 31.6% 99.5
12.5 hz 28.2% 106.7
16 hz 22.4% 111.3
20 hz 17.8% 113.7
25 hz 8.9% 116.6
32 hz 5.0% 119.6
40 hz 10.0% 122.3
50 hz 6.3% 125.3
63 hz 4.4% 127.7
80 hz 1.99% 128.8
100 hz nill 130.4
125 hz nill 131.4
160 hz nill 131.2
200 hz nill 130.3
 
AcuDefTechGuy

AcuDefTechGuy

Audioholic Jedi
Based on the CEA data presented by Mark, I changed out the 134dB SPL claim to 125dB and also included the measurement info in the article as listed below:


10 hz 31.6% 99.5
12.5 hz 28.2% 106.7
16 hz 22.4% 111.3
20 hz 17.8% 113.7
25 hz 8.9% 116.6
32 hz 5.0% 119.6
40 hz 10.0% 122.3
50 hz 6.3% 125.3
63 hz 4.4% 127.7
80 hz 1.99% 128.8
100 hz nill 130.4
125 hz nill 131.4
160 hz nill 131.2
200 hz nill 130.3
So Max SPL is not a single number, but an average of all those SPL numbers from 10Hz-200Hz?
 
mwmkravchenko

mwmkravchenko

Audioholic
So Max SPL is not a single number, but an average of all those SPL numbers from 10Hz-200Hz?
That really depends on the marketing department.

Take a good look at the figures. Is it 128 db or 111 db? Most companies do not post the numbers we did. Some do and I applaud them.

We posted a decade span from 10 to 100 hertz. There is a serious drop in the output. But most peoples rooms will have serious reflection reinforcement along the same lines as the drop. So thinking of the room as adding in a mirror image in the way of refection to the out put. Tis sub, and most other subs to some degree can give you quite a flat frequency response in room.

Where this sub has quite an advantage in in swept volume, and very low distortion. So much more dynamic, a sense of limitless power.

Simply put this is one very good subwoofer capable of very high sound pressure levels. And due to the low distortion levels it is very tuneful, as in you can discern the changes in pitch away down low. Very important to me. I have loved organ music for 30 years, and there are all kinds of rumbles grunts and thunders away down low that few loudspeaker systems reproduce. I have quite a large collection of classical music and I regularly review recordings. Subs like this bring many things you never heard before to light.

When I was listening to this sub before we tested it I kept telling Nathan that this is the closest thing to a proper large format horn I have ever heard. I have been a specialist in high efficiency horns for many years. This gives you most of what they do in a much smaller package. And the dynamic range is quite interesting to listen to believe me!
 
gene

gene

Audioholics Master Chief
Administrator
mwmkravchenko

mwmkravchenko

Audioholic
Interesting thread Gene. If I get a chance today I'll throw together a few more tidbits.
 
mwmkravchenko

mwmkravchenko

Audioholic
This is a simple THD Chart for lower SPL output.

10 hz 3.54% 75db
12.5 hz 3.2% 80db
16 hz 2.5% 87db
20 hz 2.2% 90db
25 hz 1.6% 95db
32 hz 1.0% 98db
40 hz 0.56% 101db
50 hz 0.5% 104db
63 hz 0.79% 105db
80 hz 0.6% 108db
100 hz 0.7% 109db
125 hz 0.5% 110db
160 hz 0.22% 108db
200 hz 0.18% 105db

In general terms anything in the voice range is considered objectionable if the distortion level increases more than 1%. In the low end we are looking at the distortion levels are very, very low.

Most music indeed almost all music has the largest transient peaks in sound pressure at or around the 40 to 80 hertz range.

One last point is that the distortion levels are very linear, no great peaks or large valleys. May seem a small point but in reality it displays a very well engineered driver/system. Our amps play a big part in this to. They are solid performers. Not smoke and mirror peak output rated. Quality where it counts.
 
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AcuDefTechGuy

AcuDefTechGuy

Audioholic Jedi
So what's the price on the unpowered Funk 18.2 (since the best is unpowered and all :D)?

You know the $15,000 Focal Utopia Subwoofer is unpowered. :D
 
F

funky waves

Junior Audioholic
You can contact me privately for special/custom order prices, but seeing as this unit is essentially "unpowered" with the amplification separate from the sub itself, it is the perfect system for you, optimized amplification but not "built in".
 
Irvrobinson

Irvrobinson

Audioholic Spartan
You can contact me privately for special/custom order prices, but seeing as this unit is essentially "unpowered" with the amplification separate from the sub itself, it is the perfect system for you, optimized amplification but not "built in".
Yeah, but I'm guessing ADTG wants to use his own amplifiers...
 
AcuDefTechGuy

AcuDefTechGuy

Audioholic Jedi
Yeah, but I'm guessing ADTG wants to use his own amplifiers...
Yeah, I kind of like being different. That's part of the fun for me - doing something most people wouldn't do. The individualism. :D

I like using ATI amps to power my speakers & subs.
 
mwmkravchenko

mwmkravchenko

Audioholic
Does our friend with his own amps also have his own EQ?
 
R

ratm

Audioholic
Jesus,

Reading this was harder than memorizing the Kreb's Cycle (which is still up there as the most useless info I've ever learned). Sorry for the noobish question, but why 2400 watts and 4800 watts? Whats the purpose of having the ability to double the wattage, to get that extra 3db's? Its hard to imagine needing that much power.
 
Irvrobinson

Irvrobinson

Audioholic Spartan
Jesus,

Reading this was harder than memorizing the Kreb's Cycle (which is still up there as the most useless info I've ever learned). Sorry for the noobish question, but why 9600 watts and 4800 watts? Whats the purpose of having the ability to double the wattage, to get that extra 3db's? Its hard to imagine needing that much power.
You have a 10,000 cubic foot listening room and want to rock. I know someone like that. There's also the gotta-have-the-most-powerful-version factor, which IMO accounts for most of the Mercedes AMG sales I'm aware of. And then of course there's the factor of not being able to calculate your annual discretionary spending to within $10K per year anyway, so why not?
 
AcuDefTechGuy

AcuDefTechGuy

Audioholic Jedi
Does our friend with his own amps also have his own EQ?
I don't use EQ for anything, speakers or subs. But if I wanted to, I could buy a Crown amp w/ EQ/DSP. But I don't want to use EQ or DSP for anything. I don't even like Room Correction.

Jesus,
Reading this was harder than memorizing the Kreb's Cycle (which is still up there as the most useless info I've ever learned). Sorry for the noobish question, but why 2400 watts and 4800 watts? Whats the purpose of having the ability to double the wattage, to get that extra 3db's? Its hard to imagine needing that much power.
I use an ATI AT3002 amp for my dual Funk 18.0 subs. It's 450 watts into 4 ohms from 20Hz-20kHz @ 0.03% THD. I have two Crown 2400 watts amps in my closet.
 
mwmkravchenko

mwmkravchenko

Audioholic
[QUOTEI don't use EQ for anything, speakers or subs. But if I wanted to, I could buy a Crown amp w/ EQ/DSP. But I don't want to use EQ or DSP for anything. I don't even like Room Correction. ][/QUOTE]ce

Every small format sub has to use a means of EQ. It is simple physics. And there is so way to cheat physics, no matter what many companies marketing departments may like you to believe. A small box will create a high system resonance. That is universal. Even custom designed drivers with extreme mass loading ala Velodyne still require EQ. A means to manipulate this is the incorporate EQ into the design.

So as with all well designed systems you cannot take it apart and expect it to work correctly.

Going without EQ is not an option here.
 
AcuDefTechGuy

AcuDefTechGuy

Audioholic Jedi
Every small format sub has to use a means of EQ. It is simple physics. And there is so way to cheat physics, no matter what many companies marketing departments may like you to believe. A small box will create a high system resonance. That is universal. Even custom designed drivers with extreme mass loading ala Velodyne still require EQ. A means to manipulate this is the incorporate EQ into the design.

So as with all well designed systems you cannot take it apart and expect it to work correctly.

Going without EQ is not an option here.
It has been an option for me since 1994 when I used unpowered subs. It has always sounded great. It still sounds great. I'm not about to use EQ now or ever.
 
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