JL W7 Home Conversion !! :D

[annunaki]

How about the sub itself? Can it be down or up firing? ... just curious. The high pass infrasonic filter, what would you do that with? A DCX-2496?

From the calculations I have found I would not advise up or down firing at the moment.

I would suggest a Mini-DSP in this case as it is more flexible with frequency selection below 20hz.

 

[RBrashears]

When looking up the mini dsp what am I looking for, any specific model ?

 

[annunaki]

When looking up the mini dsp what am I looking for, any specific model ?

This one is what you would use.

 

[RBrashears]

Thanks a million everyone I couldn't do it without your help.. I think I have enough info to get things ordered and get ready for my build, I'll keep everyone posted on the progress !!!

 

[annunaki]

Thanks a million everyone I couldn't do it without your help.. I think I have enough info to get things ordered and get ready for my build, I'll keep everyone posted on the progress !!!

Glad we could help! Let us know if you need any other assistance.

We look forward to your pics and your build thread in the DIY section...

 

[Warpdrv]

. The DCX2496 does not allow for this unfortunately.

Not True, you just have to do a workaround solution to get there..

Mark Seaton posted this ages ago...

Quote"Hi Ilkka, Awesome results on this sub and of course the data on all the others. FYI, you can use the DCX to high pass lower than 20Hz. There are two means to get an effective lower frequency high pass filter. If you look at both 12 & 18dB/octave Bessel filters, you will see the sharper roll off is in fact a good bit lower than the nominal Fc. Addition of 1-2 PEQ's makes a lower effective XO pretty easy. The other, more straight forward option is to use a Butterworth or LR with a simple 12dB/Oct Low Shelving filter (would have to check the "Q" of the shelf to see if or LR matches best). In simple terms, you are basically applying a Linkwitz Transform to the high pass filter. Works just fine within reason. There is probably some point where the cut and boost exceed the working range of the DSP math, but I've done this in practice a few times with good results.

As well as another person that will go un-named

Well, that's actually quite easy. The DCX does not have ability to set filters below 20Hz. While this may seem to high, it's not really. You can easily extend the actual filter by for example setting high pass filter to 20Hz, 2nd order, Butterworth. Now add a single parameteric band at 20Hz in the EQ section on the unit, set to Q of 1.5 and gain of +4 dB. This will counteract and extend the roll off, giving you an effective roll off on the 13w7 of -3dB around 17Hz and -6db around 14hz, with rapid roll off after this; exactly what you want with this 10 cubic foot cabinet tuned to about 16Hz to prevent excessive excursion under this tuning frequency.

 

[Warpdrv]

Also, as far as the Inuke - I wouldn't rule it out

Michael Hurd just got 4 of the Inuke 3000's in and I'm waiting to hear back from him on the Power as well as EQ performance...

If there is anyone I trust - it would be him.... I'll keep you posted as soon as I hear word back from him...

 

[lsiberian]

Also, as far as the Inuke - I wouldn't rule it out

Michael Hurd just got 4 of the Inuke 3000's in and I'm waiting to hear back from him on the Power as well as EQ performance...

If there is anyone I trust - it would be him.... I'll keep you posted as soon as I hear word back from him...

That is fascinating, but the mini dsp offers a lot more IMO. You can integrate the subs and front sound stage with an external amp. I suppose I need to demonstrate this soon.

 

[Warpdrv]

That is fascinating, but the mini dsp offers a lot more IMO. You can integrate the subs and front sound stage with an external amp. I suppose I need to demonstrate this soon.

So you have experience with the DSP in the Inukes then from what your saying, can you expand on that a bit more ?

I'm not saying the MiniDsp is better or not, but if one could eliminate having yet another link in the chain and external devices that need to be wired up I'm all for it... I hate having multiple external devices in my system, simplicity providing form and function will always get my vote first...

 

[Warpdrv]

Well I got an update from my friend from Canadia on the Inukes 3000DSP... He is EXTREMELY well versed with the DCX2496, and helped me extensively during setup of my monster subs. We were chatting over gmail....

well you can't do anything below 20 hz, you can by combining a high pass with a PEQ like Illka did with the DCX etc to get a similar transfer function to a 16 hz highpass.

The voltage limiter is a nice touch so you can tell the amp the load, and then limit the power for instance, with a 4 ohm load in bridged mode, at 64.5 volts, it's showing a limit of 1039.2W simple I/VR calculation. The fan is LOUD, louder than the EP series IMO, but I haven't heard them side by side.

8 filters per channel, you can set each one up as either a parametric eq, or a shelving filter in bridge mode, you only get the 8 total, not 16 filters that is in addition to either a low pass or highpass ( in another tab )
So to clarify, you could send the amp a full range signal, roll it off at 80 hz ( lowpass at 12 db per octave ) plus 8 Parametric Eq's you can store 19 presets on the amp, with unlimited profiles as well in your computer.

18 gauge IEC cord on the 3kw unit !?!

Me: 18ga chord... hmmmm

Mike: well it does pull power differently since it's a class D with SMPS and the duty cycle on a sub is relatively low

me: true

Mike: so while it does 2K + bursts for 30 msec at a time, and there is a 1/2 second period between bursts, the caps are being charged up

 

[Alex2507]

The fan is LOUD

Not that I'm in the market but for me the loud fan is a deal breaker just
because of my gear being housed within ear shot. Still a cool discussion.

 

[Warpdrv]

I'm not choosing sides with this gear or that, just pushing out the info that I heard and I find to be interesting.... The Class D amps always peak my interest for efficiency's sake. Built in DSP adds to my curiosity.

There is always the ability to swap out these fans, in fact there is a youtube on this amp already out there. Fans are a super easy change and also inexpensive as well...

 

[RBrashears]

I know it's not the Behringer amp but I'm thinking about just using my Qsc gx5 amp to power this beast, since I already have the amp it would save some money for my ht receiver Im going to buy, any suggestion on using it?

 

[AudioAddict32]

Since you have the JL driver already it will perform Well for you if you can come up with the power to run it.I guess youve figgured out its going to take a huge Box but if you do sealed It performs well as JL chose to seal them in their offerings if i remember correctly. its a more than capable driver for such an old design and should serve you well. Good Luck.