Official JTR Orbit Shifter Subwoofer Thread - Page 19

Originally Posted by lbrown105 

Thanks Zivkof for the information, I don't have a great pic of it right now but it is the LFU version and you can see it in this shot taken form the main LP which is about 9.5 ft away from the horn opening. If I add another OS I will no co locate for two reasons. One, it would inhibit viewing a tiny bit from the couch that is right next to it because of the added height. The other reason is the placement now is giving a lot of gain between 20-35 hz ((10-15db) and my hope is by locating mid point along the opposite side wall that might even that out a bit So although the calculation says I should only gain 3bd if you factor in how much I currently have to cut the 20-30hz range I could end up with substantial gain if the placement is right.
Curious why will I get less consumption from the wall with two OS's running vs 1?

Originally Posted by ZivkoF 

Thanks Ibrown105 for the great pic, yes I can see the horn opening, every time you double the power is +3dB in SPL so with two of OS LFU (+6dB) to achieve the same SPL as with one you need twice less of the power! The real result of how much you will gain with the second one is to take measurements at LP and then to move the second one to best spot place or relocate the first one. I could not find the information on OS LFU how big is the horn opening (wide x high) at JTR site if you could do that measurements. Thanks.

Originally Posted by lbrown105 

yeah i see what you mean at the same spl less draw because I have doubled the driver area too. In the end I will end up driving them both very hard but I know from another member they had no trouble with a single dedicated 20amp circuit for two OS's. The horn opening is 48.25cm wide by 50.75cm tall.
I have done quite a few REW measuremnets in my room and my guess is by keeping one corner loaded (as is now) and having another opposite mid wall may produce the best result but we'll see. Truth is right now I am waiting on my new neosis LCR and it could be quite a while before I add another OS. The other subs I have now do a good job at leveling out the room even though the are considerably less powerful.
Are your main speakers all horn design too? I thought I saw sme pics from you on another thread.

Originally Posted by sendtobrit 

Just received an Orbit Shifter and was wondering for those who have them what your gain is set to? also what your receiver is set at? I am just curious because the sub is so efficient i have it at like 18 and -5.5 on the receiver. Pretty powerful sub thanks guys.

Originally Posted by sendtobrit 

Cool good to know! I have my opening facing a corner and it seems to do pretty well. The curve has a big peak around 25hz, but if i do Audyssey it goes away and is fairly flat. i have done an A B comparison with Audyssey on then off to hear the difference and it definitely is different it seems like the Audyssey is lower volume while with it off it's louder. I'm sure it's cleaner with Audyssey engaged and the curve is much flatter but maybe flatter isn't always better! Regardless the sub is a beast and yes i have the LFU too.

Originally Posted by RMK! 

Not to offend anyone but the bar has just been raised way way up when it comes to a Home Theater with the Orbit Shifter doing LFE duty. Take a look at this amazing looking (and sounding) theater.

Originally Posted by jbrown15 

Man I'd almost be worried what dual OS's could do to a sealed room of that size!

Originally Posted by RMK! 

Yes, the components are outstanding and it is very clean looking but more importantly it was properly engineered and built to optomize AV quality. It is great to see style but with some real substance.

Vic is planning on adding a second OS and I have a pretty good idea how that will sound ...

Originally Posted by RMK! 

Hi Luke,

Yeah, that was fun . It is awesome when you feel the sound as much as hear it (and I know you know that ).

BTW, I've been following your Dual GJALLARHORN build Thread and it is looking very good. Good hobby for those cold Minn winters eh? What are you going to use for DSP?

Originally Posted by RMK! 

Hopefully you have space heaters to prevent hypothermia and, allow the glue to dry.

Originally Posted by siriusproper 

has anyone experimented with the so-called "magic power chords?" Which for what it's worth, I personally believe there are sonic benefits to be had with upgraded power chords.

Originally Posted by lbrown105 

I am looking for any information or links to threads that help educate on the best set up options for horn and sealed sub combos. I currently use the BFD 1124P and REW which is very helpful, butI got a hold of a brand new DCX2496 for very cheap so I thought I would give it a try. I know it has more flexibility and thought there may be some advatnage with all the options especially for my set up which has 3 sealed subs and one horn sub (of course the OS which is why I am positing here). Any help is appreciated. Specifically are there specific crossovers that are better suited to certain designs?

Originally Posted by subyguy 

I'm running a single OS with twin sealed 15's as you may have seen. I have my OS high passed at around 25Hz and then the sealed take over below that using a minidsp. I had no issues at all integrating the two designs as long as I stayed above where the OS started to drop off naturally. I could corner load the horn to get way more extension but I found I had a smoother response at the midpoint of my wall and since I had the sealed to cover the bottom I was happy to give up some low end on the horn to get rid of some ugliness up higher. All I did was tweak the phase a bit to eliminate some cancelling at the crossover and the rest was a breeze. I could even overlap the crossovers and create a massive hump if I wanted without any ill effects. I think posted screen shots of my dsp setting at one point. I'm currently on the waiting list for two uxl 18's because i do run out of steam with the 15's if I really boost them and we're moving to a house with a way bigger theater space so I will need the extra output. With the uxl's I may be able to raise the crossover on the OS slightly to keep it happy at super high levels as well...depends on how the room ends up but it is 18X50X9 so it's a big space.