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Swolephile's SI 24" Assemble Yourself Build - Page 5

post #121 of 223
I forgot, what are you using to EQ?

Regarding the FTW, I spoke with the owner (I think his name was Mark if I remember right) last summer when I was thinking about the 21" and he did tell me that he had HT in mind when he designed them and those looking for a driver for music this driver would do very will but wouldn't be his first choice.
post #122 of 223
Thread Starter 
Quote:
Originally Posted by Thatsnasty View Post

I'm nearly finished my pair of FTW-21's and I'm expecting them to blow me away, but hearing how they don't blend as well as the 24" with music, sounds strange.
It's true the 24" should beat them in low bass (they are 3 inches larger and have similar xmax), but I'd expect them to be quite similar in the mid-bass.
The FTW's use a lot of similar parts as the UXL, and the UXL has decent inductance management and a similar (same?) motor, so I'd expect it to be reasonably flat...

Too many unknowns for me to say anything, especially since both the 21's and the 24's haven't been "officially" tested on Data-bass.
Speaking of that, who's going to volunteer theirs? wink.gif I'd love to but there's no way I'm sending one from Canada frown.gif


I'd really love to hear more impressions as well.

It was my sub and mains taken for a quick roadtrip since I had to help my nephew move out of his dorm this week. We used a mini DSP to compensate for normal lowend rollof. My friend has a similar floorplan as my brother. 2200 cubic ft sealed room. No room treatment in either room. I did not bring my omninimic so we did not take measurements.

I had two graphs saved using my Inuke 6000 dsp with my ftw 21s but they were stored in my old dual core Dell Vostro computer which I recently sold to help fund the purchase of this driver. So all I can give is my subjective opinion at this time.
Edited by Swolephile - 12/11/13 at 8:58am
post #123 of 223
Thread Starter 
Quote:
Originally Posted by carp View Post

I forgot, what are you using to EQ?

Regarding the FTW, I spoke with the owner (I think his name was Mark if I remember right) last summer when I was thinking about the 21" and he did tell me that he had HT in mind when he designed them and those looking for a driver for music this driver would do very will but wouldn't be his first choice.

I have a mini dsp but to be honest I run everything raw without eq when Im at home. Every eq Ive tried always sounds a bit bloated or tonally unbalanced in my opinion. I get alot of room gain cause its cornerloaded in a very small room so Ive had to take the sub trim all the way down to -4 just so it wont overtake my mains.
post #124 of 223
Quote:
Originally Posted by Swolephile View Post

I have a mini dsp but to be honest I run everything raw without eq when Im at home. Every eq Ive tried always sounds a bit bloated or tonally unbalanced in my opinion. I get alot of room gain cause its cornerloaded in a very small room so Ive had to take the sub trim all the way down to -4 just so it wont overtake my mains.


Gotcha. EQ is a must in my room since my response drops off a lot below 25hz if I don't. the L/T function on the minidsp is a lifesaver in rooms like mine to boost up the lowest frequencies. .
post #125 of 223
Quote:
Originally Posted by Thatsnasty View Post

Too many unknowns for me to say anything, especially since both the 21's and the 24's haven't been "officially" tested on Data-bass.
Speaking of that, who's going to volunteer theirs? wink.gif I'd love to but there's no way I'm sending one from Canada frown.gif


I'd really love to hear more impressions as well.

Josh will be getting an HS 24" to test by Christmas. cool.gif
post #126 of 223
Quote:
Originally Posted by Electrodynamic View Post

Josh will be getting an HS 24" to test by Christmas. cool.gif

Sweet! I can't wait to see the results.cool.gif
post #127 of 223
Quote:
Originally Posted by Electrodynamic View Post

Josh will be getting an HS 24" to test by Christmas. cool.gif

Excellent. smile.gif
post #128 of 223
Great news!
post #129 of 223
Quote:
Originally Posted by Electrodynamic View Post

Josh will be getting an HS 24" to test by Christmas. cool.gif

Good deal!
post #130 of 223
Quote:
Originally Posted by Electrodynamic View Post

Josh will be getting an HS 24" to test by Christmas. cool.gif

post #131 of 223
I got Josh Ricci's driver finished up today. I had it on the test bench for about 45 minutes so it's good-to-go. biggrin.gif

I've already got an HS 24" to use in my movie room or I'd snag this one. The driver I have is the very first 24" we ever built with a rough paper cone, rough dust cap, no surround bolt down rings, etc. It doesn't look nearly as good as the drivers do now. The bolted down "gasket" really sets it off. cool.gif
post #132 of 223
Thread Starter 
Quote:
Originally Posted by Electrodynamic View Post

I got Josh Ricci's driver finished up today. I had it on the test bench for about 45 minutes so it's good-to-go. biggrin.gif

I've already got an HS 24" to use in my movie room or I'd snag this one. The driver I have is the very first 24" we ever built with a rough paper cone, rough dust cap, no surround bolt down rings, etc. It doesn't look nearly as good as the drivers do now. The bolted down "gasket" really sets it off. cool.gif
Quote:
Originally Posted by Electrodynamic View Post

Swolephile will be getting an HS 24" to test by Christmas. cool.gif

Feel free to send another 24 my way if your feeling charitable.biggrin.gif
post #133 of 223
Quote:
Originally Posted by Swolephile View Post


Feel free to send another 24 my way if your feeling charitable.biggrin.gif

I did build two more of these beasts this week. I purchased black bolts for the "gasket" ring and I'll be trying those out on the woofer that is still in the progress of being built. Trying a different look for the front on this one.
post #134 of 223
Thread Starter 
Well I will definitely be purchasing a second SI 24 from you soon.smile.gif
post #135 of 223
Quote:
Originally Posted by Swolephile View Post

Well I will definitely be purchasing a second SI 24 from you soon.smile.gif


That says a lot right there...smile.gif
post #136 of 223
Thread Starter 
Yep. The funny thing is I never dreamed I would be the first guy using this driver at AVS. At the time of its announcement all my overtime hours were cut, I was laid off, and in danger of not having a job altogether. Now things are looking up and I am blessed to have one of these monsters in house already. Very thankful.

Just can't wait to get another one to complete the pair. I see lots of precise, thunderous bass in my near future.smile.gif
Edited by Swolephile - 12/13/13 at 11:00pm
post #137 of 223
:-)
post #138 of 223
Quote:
Originally Posted by Swolephile View Post

Yep. The funny thing is never dreamed I would be the first guy using this driver at AVS. At the time of its announcement all my overtime hours were cut, I was laid off, and in danger of not having a job altogether. Now things are looking up and I am blessed to have one of these monsters in house already. Very thankful.

Just can't wait to get another one to complete the pair. I see lots of precise, thunderous bass in my near future.smile.gif


I wonder if the sound signature is similar to the SI 18's.
post #139 of 223
Thread Starter 
Im gonna find out when I get some SI 18's for my rear subs. One big happy family.smile.gif
post #140 of 223
Nice! How many?
post #141 of 223
Thread Starter 
Either 2 or 4
post #142 of 223
What a testimonial, sooner or later people will start to realize how great sounding Nick's woofers really are and forget the micro-analysis of specs. It's a shame there isn't a rule that says you can't post about a speaker unless you've actually heard it.wink.gif
post #143 of 223
Quote:
Originally Posted by 16hz lover View Post

What a testimonial, sooner or later people will start to realize how great sounding Nick's woofers really are and forget the micro-analysis of specs. It's a shame there isn't a rule that says you can't post about a speaker unless you've actually heard it.wink.gif

Eh, it's fun to toss things around on the forums. cool.gif
post #144 of 223
"Eh, it's fun to toss things around on the forums."

...you mean like if you built a 48 cubic footer tuned to 12hz and hit it with 2000 watts of power that you'd get 120db at 12hz before room gain? :-)

spl, model, no inductance or compression effects


excursion not including high pass filter


power with 80hz low pass
post #145 of 223
^^^ Lol.. I can’t get my calculator to go that hi. smile.gif Actually a 45” cube aint that bad, especially in a large room.
post #146 of 223
Quote:
Originally Posted by LTD02 View Post

"Eh, it's fun to toss things around on the forums."

...you mean like if you built a 48 cubic footer tuned to 12hz and hit it with 2000 watts of power that you'd get 120db at 12hz before room gain? :-)

spl, model, no inductance or compression effects


excursion not including high pass filter


power with 80hz low pass

Those are pretty good graphs in theory. I mean exactly what you posted. Numbers are fun and it affords you to spend time to attempt to prove points based on anechoic chamber responses. cool.gif

Someone has built an enclosure to our spec and loves it. Regardless of some people erroenously claiming "high" inductance, etc. If you were to look at Josh Ricci's measurements of other high-stroke woofers you will notice the lack of actual low inductance specifications versus what the real inductance is. Companies tend to lie about the inductance of their speakers to make it look better to the customer. You can vary the inductance value based on the frequency at which the inductance is taken at. The higher the frequency, the lower the Le is. Which is why the TC LMS Ultra has such a low Le on paper from the factory but the Le is significantly higher when measured at 1K Hz by Josh Ricci. Not to mention the the LMS 5400 is limited to ~35mm one-way because of the surround.
Edited by Electrodynamic - 12/14/13 at 11:07pm
post #147 of 223
Quote:
Originally Posted by LTD02 View Post

...you mean like if you built a 48 cubic footer tuned to 12hz and hit it with 2000 watts of power that you'd get 120db at 12hz before room gain?

LTD, I think everyone would agree that you perform an incredibly valuable service around here - particularly when it comes to helpful reminders of the value that can come when one is willing to compromise a bit on cabinet size.

But that doesn't mean you're not also pure evil. wink.gif
post #148 of 223
"affords you to spend time to attempt to prove points based on anechoic chamber responses."

not sure it is so much about proving points as it is seeing how various drivers will perform in various enclosures. with respect to inductance, i was simply indicating that it is not part of the model presented. not that it is either good or bad for this driver. btw, winisd models for 2pi space--1/2 a super large anechoic chamber. :-)

"Companies tend to lie about the inductance of their speakers to make it look better to the customer. You can vary the inductance value based on the frequency at which the inductance is taken at. The higher the frequency, the lower the Le is. Which is why the TC LMS Ultra has such a low Le on paper from the factory but the Le is significantly higher when measured at 1K Hz by Josh Ricci."

it appears that tc sounds is not the source of the error to which you refer.

the manual states le as 3.4 mh, not 1.96mh. ricci measured 3.83. i'd call that within the realm of different measuring conditions.

http://www.parts-express.com/pedocs/manuals/293-666-tc-sounds-lms-ultra-5400-manual-43422.pdf
post #149 of 223
You can take 2 of the same drivers, in 2 different boxes and have them sound different and it has nothing to do with the actual driver but it's implementation.
post #150 of 223
Quote:
Originally Posted by LTD02 View Post


the manual states le as 3.4 mh, not 1.96mh. ricci measured 3.83. i'd call that within the realm of different measuring conditions.

http://www.parts-express.com/pedocs/manuals/293-666-tc-sounds-lms-ultra-5400-manual-43422.pdf

So TC Sounds published two different sets of Le parameters for their LMS Ultra? Interesting. Depending on which link you clicked it yielded an Le variance of almost 100%.
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