Official Rythmik Audio Subwoofer thread - Page 987 - AVS Forum | Home Theater Discussions And Reviews
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post #29581 of 29598 Old Today, 11:02 AM
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Originally Posted by citsur86 View Post
I don't have any clipping happening in the subwoofers. With these levels at 0, during normal listening volume the FV15HPs are getting about .4V only. Like this, they get 1V normal listening volume and about 2V at reference. My understanding was that ideal setting for them was to get between 1-4V. That is one of the main reasons I did this. I have the volume knob much lower on the Rythmiks now with the input voltage higher than it used to be. The knobs are about 10 o'clock now - whereas before with the .4V to .9V (with miniDSP 2x4-HD gain at 0), I had the FV15HP volume knobs at 3-4 oclock.



Understood - was actually going to start a new thread specifically related to Gain Structure and my unusual situation. My hopeful answer to all this mess is simply that the VSX-44 has low pre-amp output voltage.
I still think splitting the difference would be better... whatever gets the gain knob around 12 o'clock.

Current Setup REW measures

UN46EH6030 Calibration/Settings

Samsung UN46EH6030; Yamaha HTR-3066, SVS Prime Bookshelf Mains and Prime Center, Sony SS-CS5 Surrounds, Cambridge S20 Rear Surrounds, Rythmik LV12R; PS4 Slim, Xbox One, Xfinity X1
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post #29582 of 29598 Old Today, 11:17 AM
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Originally Posted by Schrodinger23 View Post
Thanks for adding that. I'm glad to hear you really like your PSAs. I don't want others to get the impression that I think PSA or JTR make speakers that only play loud and do nothing else well. I haven't heard either of them so I can't speak to anything other than just the basic design of the speaker. My main point that I was trying to get across is that most of us can probably put much less attention on sensitivity and thereby giving us many more options for speakers. That's not to say that sensitivity is not important, especially when one has a very large room and/or sits very far away from the speakers. But, for me (since I have a small room) sensitivity is toward the bottom of my list in terms of what is important. Towards the top of my list are things like accuracy (in terms of one axis frequency response), transient response, wide horizontal dispersion, good looks, etc. The more things I add to this list the smaller my pool of speakers to pick from becomes and often the more money I might have to spend.


Agree, it's a very personal choice, especially when it comes to speakers more so than subs.


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post #29583 of 29598 Old Today, 12:18 PM
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Originally Posted by citsur86 View Post
I see - this also makes me wonder if the 2x4 HD is then clipping the output since I have them turned up to +12db on all outputs. However, when I measured with AVR at MV and subwoofer channel level 0, the miniDSP 2x4-HD output was still only generating about 1.9V out. It is rated for 2V max output, so I guess I am good there. I also looked at the output meters in the 2x4 software while running bass heavy scenes at reference and they never came close to clipping - hit the yellow a couple times but mostly played in the upper green area. The highest they got was about here, and that was at the peak moments.
Is the spec. 2V peak or 2V RMS. What are you using to measure it? When you are measuring 1.9 volts how are you measuring it??? If you're using an oscilloscope then you should be able to determine if its under the 2 V spec., either peak or RMS. If you're measuring 1.9 volts with a voltmeter then I suspect the peaks may well be over a 2 V peak spec.

Regards, Ken (Retired)
9.1) Denon 4520CI; Samsung 55H8000 & BD-F7500; R&LRS/L/R SVS Ultra BS,
Ultra Center; FH & SS Polk; Rythmik F12; CyberPower CP1500PFCLCD (x2)
2.1 Ch.) Nakamichi RE-2, CDC-4A, CR7A, Denon 300F/Ortofon 2M Bronze;
ADS L1290(x2); PINNACLE BABYBOOMER SUB, PANAMAX MR4300
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post #29584 of 29598 Old Today, 12:25 PM
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Originally Posted by Matt2026 View Post
Is the spec. 2V peak or 2V RMS. What are you using to measure it? When you are measuring 1.9 volts how are you measuring it??? If you're using an oscilloscope then you should be able to determine if its under the 2 V spec., either peak or RMS. If you're measuring 1.9 volts with a voltmeter then I suspect the peaks may well be over a 2 V peak spec.
I'm measuring using a voltemeter.

The 1.9V was from a 60Hz tone with REW outputting at max (-3db) and on ch4 (so extra 10db) and AVR at reference MV. I also tested with same volumes having actual, bass heavy content playing, and checked that along the whole signal chain, no inputs, outputs, or speakers were clipping.

The spec is:

Max Input = 2V or 4V (jumper -selectable) - I'm using 2V
Max Output = 2V RMS



I actually chatted with a Parts-Express technical resource today and explained my entire Gain Structure, measurements taken under different conditions, etc. and according to the guy I spoke to, he believes I am properly setup and should be getting the cleanest and most distortion free audio from my subs and tactiles.
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post #29585 of 29598 Old Today, 12:42 PM
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Does that mean we can possibly expect your full review/report in a month?

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Jim, where will your review be posted when it is ready?
Not Jim but the Jman usually posts a link to his hometheatershack review.
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post #29586 of 29598 Old Today, 01:50 PM
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Originally Posted by PlasmaPZ80U View Post
I think you may get more assistance with this in the MiniDSP or REW thread or even create a new one. I understand this stuff to a certain degree but I have been into audio only for 2-3 years so, I still have a lot left to learn.
I have been into audio for more than 50 years but, based on your posts I have seen, I still have a lot more to learn than you do. So there's that. More seriously, I know that you were talking about audio's technical aspects and I didn't become even semi-serious about that until the last few months.

HT setup: Sony 75XBR X940D UHD HDR TV; Kaleidescape Strato Movie Server 6 TB; Yamaha RX-A3060 AV receiver; Sonamp 2-1 2channel 100W power amp; Crestron Control System; 2 Rythmik FV18 subwoofers, 6 Hsu HB-1 Bookshelf speakers, 1 Hsu HC-1 Center speaker, 4 Focal ICW8 in-ceiling Atmos speakers; Oppo UDP-203 4K HDR BD player; Mac Mini HTPC. TiVO Bolt 1TB DVR; TiVo Premiere Elite 2 TB DVR
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post #29587 of 29598 Old Today, 03:26 PM
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@gwsat what are the current settings on your FV18s? I finally have some time to do some serious listening/testing.
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post #29588 of 29598 Unread Today, 03:50 PM
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Originally Posted by Marc Alexander View Post
@gwsat what are the current settings on your FV18s? I finally have some time to do some serious listening/testing.
Marc -- Volume is at 50 percent, one port is closed, tuning frequency is 12Hz, Rumble Filter is ON, Damping is HI. Good luck! Settings are identical on both FV18s. Please let us know your impressions when you have reached some conclusions.

HT setup: Sony 75XBR X940D UHD HDR TV; Kaleidescape Strato Movie Server 6 TB; Yamaha RX-A3060 AV receiver; Sonamp 2-1 2channel 100W power amp; Crestron Control System; 2 Rythmik FV18 subwoofers, 6 Hsu HB-1 Bookshelf speakers, 1 Hsu HC-1 Center speaker, 4 Focal ICW8 in-ceiling Atmos speakers; Oppo UDP-203 4K HDR BD player; Mac Mini HTPC. TiVO Bolt 1TB DVR; TiVo Premiere Elite 2 TB DVR
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post #29589 of 29598 Unread Today, 03:55 PM
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Just watched the grenade scene from WWZ at -10 on the volume, one port low dampening, both subs 6db hot and no chuffing. That's typically the loudest I listen at sometimes I will crank it to -7.5, but I value my hearing.

Display - LG OLED
Receiver - Denon
Speakers - Klipsch
Subs - Rythmik
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post #29590 of 29598 Unread Today, 04:10 PM
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in my space of 50x30x14 1 15hp doesnt cut it...i add my 2 velodyne subs and its good enough...everyone different in wants/needs...rhythmik subs sound good w/music so i am happy

i will just add that my big open space requires alot of power/capability with speakers...subs included.

Power: Marantz sr7008, NAD C 275Bee x 2, Video: Oppo 103, Samsung 75un6300
Speakers: Focal aria 948, Focal cc900, Klipsch synergy KSF 10.5 Subs: Velodyne HGS 12, VA 1512, Rythmik FV15HP

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post #29591 of 29598 Unread Today, 04:42 PM
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Quote:
Originally Posted by JT78681 View Post
Just watched the grenade scene from WWZ at -10 on the volume, one port low dampening, both subs 6db hot and no chuffing. That's typically the loudest I listen at sometimes I will crank it to -7.5, but I value my hearing.
I remember Brian posting somewhere that using low damping for high spl can reduce bad noises in ulf heavy scenes vs. high damping. I think it was because 1 port 14Hz high damping on the FV15HP is alot like a sealed sub response and to have a ported Rythmik play high spl down very low, high damping is significantly more demanding than low damping.

And now Marc was mentioning the FV18 has a ideal transfer function with 3 ports 14Hz mid damping which I'm assuming is related to the above.
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post #29592 of 29598 Unread Today, 04:46 PM
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in my opinion high damping isnt as good as low...just adding more eq to a system

Power: Marantz sr7008, NAD C 275Bee x 2, Video: Oppo 103, Samsung 75un6300
Speakers: Focal aria 948, Focal cc900, Klipsch synergy KSF 10.5 Subs: Velodyne HGS 12, VA 1512, Rythmik FV15HP
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My opinion is the opposite but it is a matter of what you like to hear. At least with Rythmik you have choices. A mixed blessing.

"After silence, that which best expresses the inexpressible, is music" - Aldous Huxley
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post #29595 of 29598 Unread Today, 05:22 PM
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well i will just add today after 2 hrs of random steely dan i had great tactile feel, but thin bass. maybe my ears, who knows...1 sub big area

going on 4 hrs at 0mv

yea im ready to turn it down now kinda :P

Power: Marantz sr7008, NAD C 275Bee x 2, Video: Oppo 103, Samsung 75un6300
Speakers: Focal aria 948, Focal cc900, Klipsch synergy KSF 10.5 Subs: Velodyne HGS 12, VA 1512, Rythmik FV15HP

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kid charlemagne has some testing

Power: Marantz sr7008, NAD C 275Bee x 2, Video: Oppo 103, Samsung 75un6300
Speakers: Focal aria 948, Focal cc900, Klipsch synergy KSF 10.5 Subs: Velodyne HGS 12, VA 1512, Rythmik FV15HP
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post #29597 of 29598 Unread Today, 06:06 PM
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Think I had a breakthrough with the subs tonight. I plugged both line in slots in both subs and set crossover on sub to 60hz (AVR set to 80hz for tactiles sake). I read the crossover can cause boominess. Made it a bit better but boominess was still there. Then I figured I'd try to set phase to 180. Eureka! I guess the VSX-44 was setting phase the wrong way because after doing that the loud muffled boominess is all but gone! I'm left with the clean punchy articulate rumble bass. Will have to watch more content but I can already tell it's much improved.
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post #29598 of 29598 Unread Today, 06:14 PM
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Did you check polarity on the subwoofers? Read Step 6, page 17 of miniDSP 2x4 setup guide by Austin Jerry. Most likely you have to invert polarity in one of the subwoofers.



Enrico Castagnetti @ Rythmik Audio
Media Room: Ascend Acoustics Sierra Towers w/ RAAL, Horizon w/ RAAL & Sierra 2s | Rythmik F12SE (x2) | Marantz SR7008 | Parasound Halo P5 | Emotiva XPA-3 & XPA-200 | Oppo 105D | Sony HW40ES |
Desktop: Dynaudio BM5 mkIII | Rythmik L22 | Apogee Quartet | 27" iMac|
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