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Official Rythmik Audio Subwoofer thread - Page 308

post #9211 of 15139
Quote:
Originally Posted by mlundy57 View Post

After rerunning the experiment i learned that the hole I heard after setting the mains to small 80 Hz was due to my forgetting to raise the crossover on the sub. After I increased the sub's crossover to 100 Hz the 80 Hz setting on the mains worked very well. Overall the system sounds better this way than it did when the mains were running full and the sub's crossover was set to blend with them. Since this works so well when I order my new sub for the office I will go with a PEQ amp with the HPF out jacks instead of using an external crossover.

Question: The mains were ported to reach their -3 dB point of 45 Hz. Since I am now crossing them at 80 Hz should I plug the ports?

Excellent answer to your x-over needs. The PEQ's HPF output sound quality will most likely be atleast as good as reasonably priced separate x-overs out there.
post #9212 of 15139
Quote:
Originally Posted by isagreg View Post

I have LV12R sub. I have set the Power to AUTO.

The manual says "AUTO detects the input signal and turns on the amp immediately and turns off the amp after 45 minutes of inactivity".
I noticed that sometimes the sub would not turn off by itself. Last night I watched a movie then turned everything off leaving the sub on Auto. In the morning it was still on.

Does anyone have an explanation for this?
Also do you guys set your subs to Auto or On?

Thanks

yes, you most likely have a ground loop issue that's causing the amp to stay on.
post #9213 of 15139
What is ground loop?
It's not staying always on, usually it will turn off, but sometimes it just stays on.
I think I will keep it always on since it doesn't draw much power.
post #9214 of 15139
Quote:
Originally Posted by isagreg View Post

What is ground loop?
It's not staying always on, usually it will turn off, but sometimes it just stays on.
I think I will keep it always on since it doesn't draw much power.

DonH50 above gave you the "most likely" culprits. I would just experiment and see if you can actually see/make the amps come on, with your AVR off, via other thinks like turning on lights or powering up other devices on that circuit. I know sometimes my powered towers would come on when I plugged/used the vacuum on the same plugin circuit etc.

I wouldn't worry about a ground loop unless your house is older, or your house wiring is in question and/or you are getting noise or hum issues coming from the sub while on etc.

Also, I'm new to my Rythmik subs yet have noticed they auto power up "sooner" than my towers. Could just be the soundtracks or a more sensitive auto-on circuit. Completely normal either way.

Cheers
post #9215 of 15139
Is the sub humming constantly with a buzzing noise? That is the usual indication of a ground loop.
post #9216 of 15139
I have seriously been looking at the F25 since Jan (had to wait a bit) and I wanted to know if anyone has picked one up yet.
What is the DB output on these bad boys? Any other info? I checked the site and didn't have too much info on there, I couldn't tell if what is there is from the older version or the new one.
post #9217 of 15139
Quote:
Originally Posted by Replacement View Post

I have seriously been looking at the F25 since Jan (had to wait a bit) and I wanted to know if anyone has picked one up yet.
What is the DB output on these bad boys? Any other info? I checked the site and didn't have too much info on there, I couldn't tell if what is there is from the older version or the new one.

One thing to know is I do not believe they are shipping them as of yet - or if they are its extremely expensive. Last I read they were for sale "local pickup" only.

Cheers
post #9218 of 15139
Quote:
Originally Posted by KJSmitty View Post

One thing to know is I do not believe they are shipping them as of yet - or if they are its extremely expensive. Last I read they were for sale "local pickup" only.

Cheers

I thought Brian had this sorted out now? If you go to the Rythmik webpage and pull up the F25 and click on buy it shows they ship them via UPS. For example it would cost me $180 to get it shipped to Washington.
post #9219 of 15139
Quote:
Originally Posted by jbrown15 View Post

I thought Brian had this sorted out now? If you go to the Rythmik webpage and pull up the F25 and click on buy it shows they ship them via UPS. For example it would cost me $180 to get it shipped to Washington.


the website has showed 180.00 since the f25 released however its not the case. last i herd shipping was 400+
post #9220 of 15139
Quote:
Originally Posted by basshead81 View Post

the website has showed 180.00 since the f25 released however its not the case. last i herd shipping was 400+

No when I last looked at the F25 it showed $450 for shipping to Washington, it has since changed. If it really is $400, that's crazy. JTR only quoted me $250 to ship out a Captivator S2 which is bigger and heavier.
post #9221 of 15139
Quote:
Originally Posted by DonH50 View Post

Is the sub humming constantly with a buzzing noise? That is the usual indication of a ground loop.
No, it's not.
post #9222 of 15139
Quote:
Originally Posted by jbrown15 View Post

No when I last looked at the F25 it showed $450 for shipping to Washington, it has since changed. If it really is $400, that's crazy. JTR only quoted me $250 to ship out a Captivator S2 which is bigger and heavier.

hmm ok when i contacted rythmik about purchasing a f25 3 weeks ago the website showed 180.00 but I was told they could not ship, then a few days after it was posted in this thread they could ship for a hefty price. I have not inquired about it since...hopefully it is all worked out because I would like to hear some reviews on it!
post #9223 of 15139
Quote:
Originally Posted by basshead81 View Post

hmm ok when i contacted rythmik about purchasing a f25 3 weeks ago the website showed 180.00 but I was told they could not ship, then a few days after it was posted in this thread they could ship for a hefty price. I have not inquired about it since...hopefully it is all worked out because I would like to hear some reviews on it!

So I am still confused where this $450 shipping quote is from. We most likely will use UPS freight service for F25 shipping. The new pricing discount from UPS is approved. We just need to have account manager show us how to use the system.

-
Edited by Rythmik - 4/15/13 at 1:22pm
post #9224 of 15139
Quote:
Originally Posted by Rythmik View Post

So I am still confused where is this $450 shipping quote is from. We most likely will use UPS freight service for F25 shipping. The new pricing discount from UPS is approved. We just need to have account manager show us how to use the system.

That's great news Brian.
post #9225 of 15139
If I pick up a second LV12R how would I go about eqing it? My receiver is a denon avr-1713. I know it will eq one, but I'm pretty sure not two. I guess more specifically how would I get proper phase alignment between the other sub and speakers?
post #9226 of 15139
Quote:
Originally Posted by Rythmik View Post

So I am still confused where this $450 shipping quote is from. We most likely will use UPS freight service for F25 shipping. The new pricing discount from UPS is approved. We just need to have account manager show us how to use the system.

-


Clement,

The F25 is huge. If you have the space, go for it. The shipping is expensive, $450 (with no brokerage and taxes) or $780 (with brokerage and taxes).

Best Regards,

Enrico Castagnetti
Rythmik Audio - Tech Support



here is where it came from probably ! but people maybe forgot to mention that i was located in canada ... not far tho , im just 45min from the border ( montreal )

by the way Brian , i was wondering if that price was still the same , cause i think it was before u had your pricing discount or w/e...
post #9227 of 15139
Quote:
Originally Posted by JT78681 View Post

If I pick up a second LV12R how would I go about eqing it? My receiver is a denon avr-1713. I know it will eq one, but I'm pretty sure not two. I guess more specifically how would I get proper phase alignment between the other sub and speakers?

I guess I could do a search on this first smile.gif
post #9228 of 15139
Quote:
Originally Posted by JT78681 View Post

If I pick up a second LV12R how would I go about eqing it? My receiver is a denon avr-1713. I know it will eq one, but I'm pretty sure not two. I guess more specifically how would I get proper phase alignment between the other sub and speakers?
The 2 subs will be timed and equalized by Audyssey MultEQ XT as a single unity. You need a Y splitter to split the single subwoofer output on your AVR to the 2 subs. As the 2 subs are treated as one, both will be phase aligned together with the main speakers.
post #9229 of 15139
Thanks for shedding some light on that for me.
post #9230 of 15139
Quote:
Originally Posted by nemoreborn View Post


here is where it came from probably ! but people maybe forgot to mention that i was located in canada ... not far tho , im just 45min from the border ( montreal )

by the way Brian , i was wondering if that price was still the same , cause i think it was before u had your pricing discount or w/e...

No, that was before the discount. Shipping anything across Canadian border is expensive. We will re-quote.
post #9231 of 15139
Quote:
Originally Posted by Skylinestar View Post

Quote:
Originally Posted by JT78681 View Post

If I pick up a second LV12R how would I go about eqing it? My receiver is a denon avr-1713. I know it will eq one, but I'm pretty sure not two. I guess more specifically how would I get proper phase alignment between the other sub and speakers?
The 2 subs will be timed and equalized by Audyssey MultEQ XT as a single unity. You need a Y splitter to split the single subwoofer output on your AVR to the 2 subs. As the 2 subs are treated as one, both will be phase aligned together with the main speakers.

That AVR can't do independent time / phase alignment or volume for two subs, it will treat them as one.

JT78681, even top of the line Audyssey XT32 with SubEQHT equalizes the subs as if they were one, that's how you want it done. However you should do the volume settings yourself between the two (the AVR will level them as one with the mains) and come up with an approach for time/phase. For setting volume levels I am a proponent of "Gain Matching" search for a post from Craig John on the topic it has one of the better process explanations I've seen. The alternative is volume matching where they sound like they are at the same volume at MLP. Commonly in this approach, one sub is working harder and will run out of gas sooner then the other and limits your system. In gain matching the subs work equally hard, don't worry the sound is omnidirectional so it won't sound lopsided. You will need a way to measure SPL/how loud they are. SPL meters are not that expensive, but you may be able to get away with a phone app in a bind, just do a sanity check that the levels are reasonable and really go up and down appropriately.

Phase is a bit trickier, any chance you can set them up equidistant from MLP? In that case they are already time aligned with each other and Audyssey will align them (as one) with the mains pretty well. If not the general idea get the furthest sub aligned with the mains properly (u can let audyssey figure that out) and then introduce delay to the closer one to time align it with the rest of the system. Since you don't have a second "delay" setting on the AVR you can use the phase setting on the sub (or some folks have external devices like a minidsp). Knowing which setting is best depends on what gear you have. Examining the transition range around the crossover with measurement gears and sweeps is best, however with an SPL meter you can play a sine wave at crossover frequency and choose the setting with highest SPL.

Hope this helps
post #9232 of 15139
Quote:
Originally Posted by Skylinestar View Post

The 2 subs will be timed and equalized by Audyssey MultEQ XT as a single unity. You need a Y splitter to split the single subwoofer output on your AVR to the 2 subs. As the 2 subs are treated as one, both will be phase aligned together with the main speakers.

But MultEQ XT will not ensure that the subs are phase-aligned with each other, will it? I don't think it can, unless you're using XT32 which has two sub outs that it can treat differently. And isn't that how XT32 works -- it sets levels and distances for each sub individually, and then EQs them as a single entity?

So I think you'd want to optimize the phase between the two subs first (using the phase controls provided on the back of the sub), and then let Audyssey take care of optimizing the phase between the pair of subs and the mains.

Edit: dstew beat me to the punch. I'm too slow . . .
post #9233 of 15139
I Am using dual subs, with denon 1612. what i did it, plugg the 1st sub and run aud. take note the sub trim result is 0.00db, then unplug my 1st sub, plug my 2nd sub run aud. and sub trim result is +0.05db, as long as each of them gives the almost same result, them plug my Y spitter plug 1st sub and 2nd sub and run full aud. ang final result is +1.00db.
post #9234 of 15139
Thanks everyone for you input. Once I pull the trigger on the second sub I will try some of these methods out. Any suggestions on a good SPL meter that is dumby proof and wont break the bank?
post #9235 of 15139
Quote:
Originally Posted by JT78681 View Post

Thanks everyone for you input. Once I pull the trigger on the second sub I will try some of these methods out. Any suggestions on a good SPL meter that is dumby proof and wont break the bank?

JT, just jump on Amazon and search for SPL meters. Plenty to choose from at $20 on up. Many folks prefer the analog type yet the digital readout works fine as well. See if you can find one with a "slow response" setting - that can help get a more accurate consistent reading/AVR setting. I still use a RadioShack analog meter purchased about 15 years ago for $15 or $20. biggrin.gif
post #9236 of 15139
Quote:
Originally Posted by JT78681 View Post

Thanks everyone for you input. Once I pull the trigger on the second sub I will try some of these methods out. Any suggestions on a good SPL meter that is dumby proof and wont break the bank?

radio shack 49.00 simple to use and it works.
post #9237 of 15139
Quote:
Originally Posted by KJSmitty View Post

JT, just jump on Amazon and search for SPL meters. Plenty to choose from at $20 on up. Many folks prefer the analog type yet the digital readout works fine as well. See if you can find one with a "slow response" setting - that can help get a more accurate consistent reading/AVR setting. I still use a RadioShack analog meter purchased about 15 years ago for $15 or $20. biggrin.gif

You want to get a "C" weighted SPL meter.
post #9238 of 15139
This is how I set my dual 15FVHP.

Level match each sub:
Put first sub in position adj gain till I got spl reading at 64db. Then turn it off.
Put second sub in postion and doing the same thing.
(each sub seat next to my main on the
corner L and R at the same distance to LP so my phase was set at 0 degree and cross at 80hz. AVR sub channel level = 0)

Next, Turn on both sub, run test tone and
make sure I got 70db reading on my spl meter.

Finally, run AVR aud and fine tune the setting.
post #9239 of 15139
Quote:
Originally Posted by jbrown15 View Post

You want to get a "C" weighted SPL meter.

Good point. Look for one that has both A and C.
post #9240 of 15139
Brian posted instructions to time-align two subs someplace in this thread. Essentially you have to set the AVR's delay (distance) setting for one and adjust the pahse knob on the sub to align their phase (wavefronts). This is best done with a time-domain test, IME, but playing a test tone or even octave pink noise and adjusting one knob for maximum SPL should also work. Or something like that...
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