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Discussion Starter · #4 ·
Re: Coming soon. FW18.1

Finished in textured black. Response graphs at listening position(13'away) before any eq, 1/3 octave smoothing, no lowpass or highpass. In a 950 square foot room with 8-11 foot ceilings. Blue line is vented [email protected] Red line is 130L sealed.
 

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Discussion Starter · #8 ·
Re: Coming soon. FW18.1

As shown will be $1425+shipping This is just a prototype/demo

Btw, I may have some minor changes made to the driver, when I get more. Mostly cosmetic.
 

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Discussion Starter · #10 ·
Re: Coming soon. FW18.1

Sound quality is about the same a lot more bottom end with ported, but sealed is definitly very good as well. Level was the same for both tests.

I will probably be getting them with the "wet" cone with aluminium dust caps. Mainly for cosmetics.
 

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Discussion Starter · #12 ·
Re: Coming soon. FW18.1

Carlos and I havn't realy discussed the mods yet so its still very up in the air.

Here is some max output #'s

[email protected];
105.6db @10Hz
114.4db @15Hz
125.5db @20Hz
118.7db @25Hz
117.7db @30Hz
123.7db @ 40 Hz (amp limited)

Sealed 130L net, never clipped the amp.
104.6db @10Hz
107.4db @15Hz
116.5db @20Hz
111.5db @25Hz
112.7db @30Hz
120.6db @ 40 Hz
(the numbers above 20hz seem a little lower than expected I may check things over and do them agian and see if I can't get more)

also for comparison the FW15.3 with EDLT1300 amp did;
102.6db @10Hz
108.4db @15Hz
118.8db @20Hz
112.0db @25Hz
113.8db @30Hz
116.0db @ 40 Hz

So far impressions around here are they both sound very good, the 15.3 is a little "softer" "smoother", the 18.1 is "harder" "louder"(even with the levels set the same) But with a little Eq to bring up the bottom end of the Acoupower to match the 15.3 they seem even closer.

With low frequency sine waves the Acoupower seems to have a little air turbulence noise coming through, not at all noticable with real material though.
 

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Re: Coming soon. FW18.1

Finished in textured black. Response graphs at listening position(13'away) before any eq, 1/3 octave smoothing, no lowpass or highpass. In a 950 square foot room with 8-11 foot ceilings. Blue line is vented [email protected] Red line is 130L sealed.
Nice work Nathan. It looks really cool enclosure. :)

[OT]Too bad that the cone looks like a really cheap paper cone with ugly dustcap. Cone with same glossy look as the surround and with inverted dustcap would make it über cool driver. :snoring:[/OT]
 

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Discussion Starter · #17 ·
Re: Coming soon. FW18.1

I moved the 18.1 into exactly the same place I tested it in the vented box and the LMS5400 in the vented box(in the corner). And I got some better max output numbers, and more accuratly compares with the vented box, amazing what difference moving the subwoofer 2 feet over makes(it was directly beside before). Of course the better FR was 2 feet the other way, without an improvment in output. can't have your cake and eat it too I suppose.

[email protected];
105.6db @10Hz
114.4db @15Hz
125.5db @20Hz
118.7db @25Hz
117.7db @30Hz
123.7db @40 Hz (amp limited)

Sealed 130L net.
112.6db @10Hz
112.9db @15Hz
119.5db @20Hz
113.7db @25Hz
116.0db @30Hz
124.6db @40 Hz


Ps; Ricci's XXX sub had the driver in one spot and the port in the other, seeing as it was twice the size so figure that one out.
 

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Re: Coming soon. FW18.1

Outdoor measurements will set apart the room from the driver. Then you will have data on both your room and the driver itself. Cant wait to see those!

In room sealed is delivering all but 120dB @ 20Hz. Lets see. [email protected] , [email protected] :T

"With low frequency sine waves the Acoupower seems to have a little air turbulence noise coming through, not at all noticable with real material though."

Was this noise from the sealed box?

Dr V
 

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Re: Coming soon. FW18.1

That's a nice looking FR outdoors. Moving it into the corner helped the low end out a lot! A lot closer comparison to the vented sub now actually giving more output at 10hz than the vented sub. Looks like you are getting about 10db of room gain at 10hz in the corner. Nice.

Let's see:scratchhead:...now if I assume that the XXX was where the LMS was in the corner and the port was where the Acoupower sealed was tested initially...Then I average the 2 Acoupower readings to get a variable modifier and then apply the variable to the XXX #'s...It tells me....There was a lot of bass!
 
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