Official Rythmik Audio Subwoofer thread - Page 246

Wow, That looks like mine! I have two F15HP clones. I was initially planning to go with a single FV15HP, but was concerned about screen clearance. It turned out that my screen would have cleared an FV15HP with room to spare because of my platform height. I'm really enjoying my two F15HPs. Sorry for the crappy cell phone pics.

Congrats! Twin gorillas in your A/V room...wow. Time for Master and Commander......the initial opening cannon battle cranked is bad a$$! Two tall ships going at it.

I always thought the floor creaking in the surrounds was the coolest part. One of the best uses of surround I have heard.

Sweet! Congrats!

+1

One of my favorite surround demos. No explosions or bullets or arrows... just really feeling like you're in the belly of a ship!

Enveloping surround at its best.

Two excellent systems! Now both of you need to raise your center channel speakers up 'till they're just below the screen. Ideally, you want the tweeters of your front three speakers all at ear level when you're sitting. This isn't always possible, but try to come as close as you can. Having your center low will result in sounds dipping down as they move across the screen, and you want the voices to come from the faces not the waists. Instead of buying a taller stand, you can just put a small platform under your present stand.

+1 on the center channel height. First thing I noticed . . . And if you're experiencing any congestion in the center channel, getting it further from the floor may help to clean it up a bit.

Here is my omnimic graph after my calibration.

Table flat response....ya gotta love that. Must be "monstrous".

What smoothing?

I believe the one above 1/6th, but I can't remember. I moved through a few of them but don't exactly remember which one it was. I will try for a more detailed one to see, I do know that when I moved it there wasn't a whole lot of change. I am sure I could work to further improve my room, but since I have only one place to put my subs I am happy with my extension, my CHTs were rolling off above 20...

Very impressive!

Hi, I would like to purchase either the f12 or f15 to pair with my ascend acoustics HTM-200s for my home theater (has dual 4" woofers). My set up is 3 HTM 200's across the front and sonance 621r surrounds. Is there any concern about the f15 being too "overpowering" for my smallish LCR speakers? I want the best bass possible and my first choice is to get the f15 so I won't need to upgrade later. But if the f12 would integrate better with my system I'd be willing to get the f12. Any thoughts?

The F15 will be fine. Buy and be happy, especially when you can upgrade the rest of your speakers!

O.k. so i've had my F15HP SE for almost a week and i can say that i am totally impressed with the tightness of this sub. I previously had and AV123 MFW-15 which definitely had some umph to it, but no where near as clean. My concern was that this sealed sub would not put out enough to fill the rm but that is no where near the case. I'm using a Denon 4311 with Xt 32 for HT and a Parasound p2100 for stereo music . Oppo bdp-95 feeds this with and Emotiva xpa-5. This sub blends in really well with my Salk fronts crossed at 60HZ. I also have an antimode 8033 in the mix. I really do not have any option on sub placement. My rm is approx 3800 cu ft cathedral ceiling open to another area about 1500 cu ft. Not sure if i have the sub set up optimally but to my ears it sounds excellent. Using LFE input ,HT switch setup is 14Hz and Damping low with rumble filter on. Thru Parasound switches are Damping Hi and freq 20Hz again rumble filter on. Any thoughts on switch setup. I have a bunch of hi Rez music on Hard drives no RAP!! I don' t have the legs for the sub i am on a concrete slab any improvement with those. As you can see i don't have the most ideal rm but it is what it is.

Thanks Rich

Sounds like an awesome set-up.

One thing I noticed on your settings though is that for ht you have your low freq filter at 14hz with the rumble filter on. Looking at the Rythmik FAQ, it looks like the rumble filter is a 3rd order high pass filter at 20hz, so I don't think you're going to get much below 20 with that on. I think I read someone suggest 14hz and med/high damping and the rumble filter _off_ if you want want to get good output below 20hz.

Thanks for the reply, will try that on a couple of movies that i know go pretty low. I am a total newbie in the setup for subs. Any comments positive and negative are appreciated.

At what time on the disk does this occur ?

Haven't watched the movie yet.......

The entire sound demo, basically the ambient ship creeping atmosphere stuff to the ship cannon battle is all within the first 10 minutes. Just watch from the beginning, you get everything good within the first scene.

Anyone tried the realtraps test tone?
http://www.realtraps.com/test-cd.htm

I have just setup my Denon AVR Audyssey calibration and my FV15HP (volume on subwoofer is at 10:30 o'clock, LFE trim in AVR is -10dB). After that, I tried playing the 20-29Hz test tone, with master volume of -20dB on my AVR. I heard soft flapping noise from the sub as the test tone was playing. That freaks me out as I expect the FV15HP to play it effortless at 20Hz. However, there's no flapping noise while playing >30Hz test tone. I've also tested it at AVR master volume of -30dB. The flapping sound is still there but softer. The sub parameters are 20Hz, low damping, 2 ports mode, rumble filter on, power limiter on. Is there a problem with the driver?

Playback was with Audyssey MultEQ XT and Dynamic EQ turned on.

Here's the poor recording from my iPhone3GS:
Sub noise.zip 179k .zip file

Anyone in this forum has tested their subwoofer limit with these test tone? Feedback and comment are greatly welcomed.
Edited by Skylinestar - 11/25/12 at 10:24pm

I personally have not tried these test tones and have no hard answer for you but don't freak out.....Brian will chime in with his expertise. With the holidays, it might take some time for him. Hopefully, he's enjoying time with family. Brian will have answers for you and more importantly, he can make it right :-) no matter what.
I just got my new FV15HP like maybe 2 weeks ago. It takes some time to get a good setup for your environment, your equipment. Your gain on the sub seems conservative so its not like your overdriving it. Are you in 1 port or 2 port open mode?
And yes, your sub should play 20hz effortlessly.
Edited by polizzio - 11/24/12 at 3:50am

Yes, the gain is conservative to many who are used to Audyssey setup. I have watched Real Steel at -10dB master volume. The bass from the robots are strong and loud enough for me. I'm sure WOTW will be much louder than that. Hence, I don't see the need to run the LFE hot.

It's in 2 ports mode (port bung removed). I don't really need 14Hz ULF as my setup is in the family living hall, but it should be able to handle 20Hz effortlessly until reference level. As you can see from my previous post, I am doing my best to safeguard the driver by setting rumble filter to ON, limiter ON, and 20Hz low damping for steeper roll off.

Need some advice! I have a FV15. I am moving into a new house with basicly the same floor plan (good for the wife). Since I will be owning this house I want to set up the sub correctly. I have a Monoprice sub wire now. For me to do the sub crawl I will need a longer wire. My question would be Monoprice or Blue Jeans? Length will be about 35 feet. That's in case I find a spot away from the eq and have to run the wire along the base board. Thanks in advance!

Jeff

Lol , Are you playing the test tone with dynamic eq on ? Turn it off . The signal are too strong with dynamic eq on. And remember never playing the test tone continuesly more than 10 minutes , it will damage the driver.
Edited by BOTBOTCHAI. - 11/24/12 at 8:05am

Oh yes... the Audyssey has Dynamic EQ turned on by default at that time. If I'm not wrong, with lower volume, Dynamic EQ will try to bump up the bass a lot. Should have thought of that effect earlier. Perhaps Dynamic EQ with LF test tone is a bad combo.

I rarely play low frequency test tone (like the one in the realtraps CD) continuously...perhaps once or twice throughout the lifetime of a speaker/subwoofer, just to see how the driver handles with the low bass. In fact, it was my first time playing it on my FV15HP. That day I ran it for 5 secs...playing 20Hz to 25Hz...then stop.

Thanks BOTBOTCHAI for the hint and advice.

Anyone else dare to try playing the realtraps test tone? BOTBOTCHAI, you test it before and also heard the flapping noise?

Buy the monoprice......$8 for a 35' single premium rca cable . People sometimes get sucked into spending unnecessary money on outrageous cabling.

http://www.monoprice.com/products/product.asp?c_id=102&cp_id=10236&cs_id=1023603&p_id=3976&seq=1&format=2

. Yes , i have test it before with master volume -20db. I not heard any flapping sound from my subwoofer . Only once i heard my subwoofer flapping is when I playing the AVS test disc 10hz test tone . I was jump from my couch and i tell myself I will never ever play it again.LOL.
Edited by BOTBOTCHAI. - 11/24/12 at 10:23am

Was Dynamic EQ switched on at that time?

You heard the flapping at 10Hz, which is much below the limit of FV15HP. I heard the flapping at 20Hz. Should I be worried?

. Dynamic EQ is off at that time . Are you heard the flapping sound when you are watching movie like Tron , WOTW , FOTP ,Underworld at master volume -10db ? If you are not heard that flapping sound then you no need to worry cause you have turn on the rumble filter and limiter .

I have watched War Horse previously, but with Audyssey off. The LFE trim at that time was also hotter at -5dB (after Audyssey was at -10dB). The artillery/bombing scenes near the end of the movie were so powerful. On my couch (about 10 feet away from the subwoofer), I didn't notice the flapping sound at that time. I've also watched WOTW previously (with Audyssey off too). Didn't pay much attention to the flapping sound cos all I know is the bass is loud and deep, while the main speakers produces the earth and building cracking and collapsing sound everywhere.