Official Rythmik Audio Subwoofer thread - Page 195

Originally Posted by ekajnabi

I have heard a lot of good things about FV15HP and Rythmik Audio line in general and excellent customer service. I am not sure though as I am not receiving responses to my PM and few phone calls I made to +512 565 0292 (left VM) for few questions I have before the purchase. It makes me think who and how we contact if there were issues. Is this the general contact number or you guys know any others?

Originally Posted by fordf250

Check post 4778-I'm afraid your looking at several months, not just a few-looks like there are several "irons in the fire" before the 800 amp production is realized-with the 1400 amp farther out after the 800 becomes available.

Originally Posted by ekajnabi

Thanks. It sounds like we are second citizen... I hope that they will eventually get to return calls at some point. Not sure how does support works after the purchase in case of issues.

Originally Posted by qguy

Think of it this way.... when your buying a product like a car or a phone would you rather wait to get a call back from the designer himself or get an instant response from say a call center agent

Originally Posted by Rythmik


I was on a camping trip from Sat to Tuesday. You know the drill, camping sites normally don't have good wi-fi. Unfortunately, I am the one handling the shipping and that got stalled, plus there are some urgent behind-the-scene customers support. In addition, all subs are currently built to order here in Austin. There is a lead time between ordering and shipping. Hopefully, everything will get smoother soon.

-Brian

Originally Posted by Follz20

For HT I'd suggest 20Hz extension, med/high damping and rumble filter off. This all depends, of course, how large your space is, how loud you listen to movies, how far the sub will be from the LP etc etc.

Originally Posted by njfoses

So now that im waiting on my F15HP i would like to talk amp settings. Since my use is mostly ht im thinking of limiter on, 14hz high or med damping and rumble filter on. Anybody agree or disagree?

Only PEQ and XLR models have a rumble filter, so the following discussion only applies to those two models.

The rumble filter is a 3rd order high pass filter with corner frequency at 20 Hz to provide a steep roll-off below 20 Hz. It is useful when playing LP records, or when there is unwanted subsonic signals in both movies and music that makes the cone move in and out wildly without making audible audible sound. When it is on, it changes the roll-off of sealed subwoofers from 2nd order to 5th order, and vented subwoofers from 4th to 7th order.

Those who are more familiar with filter design will be interested to know that our extension filter is a 2nd order filter to set up the roll-off frequency for both sealed and vented subwoofers. With the difference of order between rumble filter and extension filter, one can actually get more flexible roll-off slope. For instance, in the following we list 3 possible roll-off slopes.

Configuration 1: a sealed box with rumble filter off and extension filter on at 20 Hz has a 2nd order roll-off at 20 Hz.

Configuration 2: for the same sub, if one wants to have a 3rder roll-off to attenuate some subsonic signals, he/she can set the extension filter to 14 Hz med damping and turn on the rumble filter.

Configuration 3: if one set the rumble filter to on and set the extension filter to 20 Hz, then one gets a 5th order roll-off characteristic from this combination.

So it can configure the sealed sub in 2nd order, 3rd order, and 5th order depending on the desired slope of roll-off. For the case of a vented box, it can be configured as 4th order, 5th order, and 7th order with configuration 1, 2, and 3, respectively.

Originally Posted by millerrh

I've got mine set on 20 Hz, high damping, rumble off right now. I tried dialing mine in as a hybrid music/ht

Originally Posted by Follz20

@njfoses

The rumble filter, in addition to attenuating signals below 20Hz, will also give you a different roll-off characteristic relative to the extension setting you set your Rythmik to.

A quote from Rythmik FAQ:

Originally Posted by njfoses

Correct me if im wrong but the higher "order" crossover equals a steeper roll-off right? If im correct then with a sealed sub which has the advantage of under 20hz response vs ported, setting the rumble filter off combined with a 14 or 20 hz setting would make sense. If the rumble filter was on there would be very little output below 20hz.

Originally Posted by millerrh

I understand it the same way, if you look on Rythmik's site you can see the effect of the higher roll off filters on the same graph too. You will get the widest frequency response at 14hz and rumble off. But there is more headroom to be had in the more audible frequency regions by setting the roll off higher.

If you read the amp settings page that came with your sub, you see he recommends 14hz for low volumes and 28hz for high volumes. In the few things I listened to, I didn't hear a whole lot of difference between 14 and 20 Hz, with maybe just a bit more punchiness added to the 20hz setting. I did hear a lot of difference with the damping and I can't imagine ever doing something different than high damping. So 20hz I feel doesn't have an audible disadvantage over 14 in the sources i have listened to so far and gives me an added layer of safety net for when I'm pushing the volume a bit. That's how I came to my decision.

Originally Posted by Skylinestar

How's the punch between 20Hz Hi Damping vs 20Hz Lo Damping?

Originally Posted by Skylinestar

How's the punch between 20Hz Hi Damping vs 20Hz Lo Damping?

Originally Posted by millerrh

It's a good question. Brian (Rythmik) a few posts up (or maybe it was in the FAQ?) said something about 28 Hz low damping being the punchiest sound for dance music.

I found high damping always gave me the tightest (what I would call punchiest) sound. I heard some of the boominess I don't like when it was set to low damping. So I kind of find this odd that low damping would equate to punchiness in Brian's book. Maybe I have a misunderstanding of what punchy is and I put it in the same category as "tight." Too many adjectives

So regardless of the frequency you set, it seems to me that high damping gives you the cleanest, tightest, and most impact (punchy sound). Lower damping settings seem to me to be not as tight, lacking impact, and introducing some boominess.

However, my observations seem to be at odds with what Brian has already posted, (and I would consider him the expert) so maybe it's just me or what I was listening to.

I still wonder what the benefit is of having lower damping settings. Seems like it always sounds worse to me. Hopefully someone with more experience can chime in. I am grateful Brian includes these in the amp though so we can see for ourselves what sounds good to us.

Originally Posted by Iain-

First thing I noticed is that limiter will affect the sound quality, therefore I use an external mains switch and leave the "Auto-On" switch to ON.

That said, I agree with your assessment that best setting is high-damping for most punch. My amplifier is set to 14 hz/hi-damping. With those settings and the limiter off I'm continuously amazed by the sound quality of this sub. It can do no wrong.

BTW, my use is 75% music and 25% home cinema.

Originally Posted by millerrh

When you say limiter do you mean Rumble Filter?

Originally Posted by ddgtr

I asked Brian most of these questions as I am waiting myself for the XLR versions to roll in:
- XLR 2/3 will be available either at the end of this month or in April sometime
- as per Brian, the Master will export all controls to the Slave. The Slave will have all its controls disabled except for phase, which can still be adjusted as needed
- I am planning to get 2 E15's with XLR, so I hope there will be higher powered amp options

It would be nice if some kind of documentation were available on these new amps.

Originally Posted by ddgtr

I asked Brian most of these questions as I am waiting myself for the XLR versions to roll in:
- XLR 2/3 will be available either at the end of this month or in April sometime
- as per Brian, the Master will export all controls to the Slave. The Slave will have all its controls disabled except for phase, which can still be adjusted as needed
- I am planning to get 2 E15's with XLR, so I hope there will be higher powered amp options

It would be nice if some kind of documentation were available on these new amps.

Originally Posted by Iain-

First thing I noticed is that limiter will affect the sound quality, therefore I use an external mains switch and leave the "Auto-On" switch to ON.

That said, I agree with your assessment that best setting is high-damping for most punch. My amplifier is set to 14 hz/hi-damping. With those settings and the limiter off I'm continuously amazed by the sound quality of this sub. It can do no wrong.

BTW, my use is 75% music and 25% home cinema.

Originally Posted by ddgtr

I asked Brian most of these questions as I am waiting myself for the XLR versions to roll in:
- XLR 2/3 will be available either at the end of this month or in April sometime
- as per Brian, the Master will export all controls to the Slave. The Slave will have all its controls disabled except for phase, which can still be adjusted as needed
- I am planning to get 2 E15's with XLR, so I hope there will be higher powered amp options

It would be nice if some kind of documentation were available on these new amps.

Originally Posted by Iain-

No.

It's the ON/AUTO-ON/OFF switch. Limiter is always on when AUTO-ON is set. Therefore I leave that switch set to ON continuously. Limiter is disabled with that setting.

Originally Posted by ntrain96

How exactly does the limiter effect SQ?