Rythmik FV18(x4) vs Rythmik FV25HP(x2) vs JTR Captivator 2400(x2) vs Monolith 16 THX(x2)

[ryanosaur]

Fwiw, I would consider vent noise a pretty detrimental factor. I don’t know how loud it was for the tester to note it in their results for the Rythmik, Beyond that there is very little difference between the output of the FV25 and the Monolith. Less than 1dB separates them at most testing points. That’s not something I would quibble over… port nose is.

 

[Pogre]

Would he be better off Picking up 4 x Rythmik FV18 Subwoofers over 2 x Rythmik Fv25HP or 2 x JTR Captivator 2400 Subwoofers.

Jeezum bawls, I don't think he'd be dissatisfied with any of those choices! My knee jerk response is to go for 4 of them. That will make integrating and dialing them in a little bit more tricky, but the end results could be epic.

Shady is our sub expert tho, and I'd let his advice override mine if it comes down to it.

 

[KING DRANZER]

Jeezum bawls, I don't think he'd be dissatisfied with any of those choices! My knee jerk response is to go for 4 of them. That will make integrating and dialing them in a little bit more tricky, but the end results could be epic.

Shady is our sub expert tho, and I'd let his advice override mine if it comes down to it.

Will have to figure out how to get 4 subwoofers working with Denon AVR-X4700H with its Audyssey XT32. Will daisy chain front and rear and split it into two. That should do it.

 

[ryanosaur]

Will have to figure out how to get 4 subwoofers working with Denon AVR-X4700H with its Audyssey XT32. Will daisy chain front and rear and split it into two. That should do it.

Add a miniDSP 2x4 and use REW and a Umik-1 to tune them... daisy chaining is clumsy and will require them to be placed very specifically in your room.
If you did daisy chain, run the front pair together, then the back pair. Each pair need to be placed symmetrically in the room and equidistant from the LP.
The miniDSP option will allow you to place them individually to their best advantage.

 

[KING DRANZER]

Add a miniDSP 2x4 and use REW and a Umik-1 to tune them... daisy chaining is clumsy and will require them to be placed very specifically in your room.
If you did daisy chain, run the front pair together, then the back pair. Each pair need to be placed symmetrically in the room and equidistant from the LP.
The miniDSP option will allow you to place them individually to their best advantage.

Okay will do that.

 

[William Lemmerhirt]

How would Purchasing 2 x Rythmik FV18 SUBs now and adding 2 more in future be.

Nukkin futz!!!!!

 

[William Lemmerhirt]

Fwiw, I would consider vent noise a pretty detrimental factor. I don’t know how loud it was for the tester to note it in their results for the Rythmik, Beyond that there is very little difference between the output of the FV25 and the Monolith. Less than 1dB separates them at most testing points. That’s not something I would quibble over… port nose is.

I don’t see a link to the port noise thing but I’ve seen it reported before. Imo, port noise is a moot point. In that if your playing THAT loud, how the hell are you gonna hear port noise over the rest of the soundtrack? Not to mention the room falling apart. Lol

 

[KING DRANZER]

Nukkin futz!!!!!

Guess 4 x Rythmik FV18 setup is getting some votes.
Hmmmm..............

Will it be as ground shaking as 2 x JTR Captivator 2400 setup.

 

[William Lemmerhirt]

Guess 4 x Rythmik FV18 setup is getting some votes.
Hmmmm..............

Will it be as ground shaking as 2 x JTR Captivator 2400 setup.

This is hard to answer without any context. But I would feel confident in saying yes. One BIG advantage will be in having two more subs. As shady mentioned before, FR is king when it comes to quality bass, especially when you get to this class of subwoofer. Having FOUR will go a lot farther in smoothing out the room than two. But I don’t subscribe to the idea that you can use a whole bunch of crappy subs and have it be better than a couple great ones. Again, in this class of subwoofer, they’re all winners.
It sounds like your friend might not have a lot of experience in this arena. I can say, if that’s true? He will blown away with any of these combinations. And if he’s really that critical about music, I believe he would already have some opinions on subs/speakers. So again, I believe he’ll be blown away no matter what.
I saw you got some nods to PSA. This is worth looking at too. Taking the whole measurements thing out of it, I know they’re are plenty of happy owners who, subjectively said they’re so much happier than when they had “XYZ” subs. Some also have in room measurements to support what they say so…take that for what you will. For Rythmik and the servo? Yeah it may not be relevant these days but they are excellent subwoofers so who cares…

 

[Pogre]

Will have to figure out how to get 4 subwoofers working with Denon AVR-X4700H with its Audyssey XT32. Will daisy chain front and rear and split it into two. That should do it.

If you keep them more or less equidistant, which they likely will be with 2 on each side of the room, you can use a splitter and put 2 per channel and still get good results. There's more of a learning curve and it's more work, but like Ryan suggests a MiniDSP 2x4 HD will give you the ability to do them all independently and would be even more ideal, but I don't think absolutely necessary.

Combined with the editor app you can do a lot with Audyssey as far as further eq'ing. There's a user created program called ratbuddyssey that gives you even more control for room curve adjustments. That's a whole other rabbit hole tho, lol.

 

[Pogre]

This is hard to answer without any context. But I would feel confident in saying yes. One BIG advantage will be in having two more subs. As shady mentioned before, FR is king when it comes to quality bass, especially when you get to this class of subwoofer. It sounds like your friend might not have a lot of experience in this arena. I can say, if that’s true? He will blown away with any of these combinations. And if he’s really that critical about music, I believe he would already have some opinions on subs/speakers. So again, I believe he’ll be blown away no matter what.

I agree. There isn't a bad choice here and any one of those configurations will turn your eyeballs into jelly.

 

[ryanosaur]

I don’t see a link to the port noise thing but I’ve seen it reported before. Imo, port noise is a moot point. In that if your playing THAT loud, how the hell are you gonna hear port noise over the rest of the soundtrack? Not to mention the room falling apart. Lol

I’m assuming those measurements are from Ricci… could be wrong.
However, the issue is more an academic one based on usage.
I guarantee that you’ll hear it in a solo organ performance with a sustained pedal tone at low c. I’d concur it might not be likely in a very dense electronic piece, or if employed in a manufactured movie sound where it is likely more transient.

Either way, I still see that as a design flaw in a Sub advertised as being capable of 12Hz reproduction.

 

[mx416]

My vote is the FV18 obviously. But the folks are right when it comes to subs. All the subs you listed are great. It’s about high quality with ample headroom. This way you can tune to try and fix the biggest factor, your room.

 

[ryanosaur]

Let's compare the two Subs with similar driver size, not dual 15s to an 18(conventional measure)...

Just for kicks, here is the FV18 CEA-2010 from Data-Bass:

And for convenience comparison to the Monolith 16:

I'm not trying to ding Brian's work at Rythmik...
(seriously, pun NOT intended!)
His gear holds up quite well after all these years. I can't help but wonder what he could accomplish with some smart retooling and updated designs!

Now, lets look at one other item:



Those are the Group Delay graphs from Ricci.
And this from Shady:

 

[ryanosaur]

Perhaps I missed it somewhere...
@KING DRANZER
How big is your total open room volume you will be putting these Subs in?
Is the room irregular or true rectangular?
What Speakers are your Mains?

Thank you.

 

[snakeeyes]

Seems like all are good choices. Get a good deal from whichever company for a pair of subs and add 3rd or 4th if needed later….4 subs maybe is going to be a tough fit in 2000 cu ft.

 

[William Lemmerhirt]

I’m assuming those measurements are from Ricci… could be wrong.
However, the issue is more an academic one based on usage.
I guarantee that you’ll hear it in a solo organ performance with a sustained pedal tone at low c. I’d concur it might not be likely in a very dense electronic piece, or if employed in a manufactured movie sound where it is likely more transient.

Either way, I still see that as a design flaw in a Sub advertised as being capable of 12Hz reproduction.

This is fair in all points. I can definitely imagine some port noise in the situation you described with the organ. I’ve even heard it with some soundtracks. Do you think the port noise would be noticeable if the subs were at a larger distance? Maybe the 12-15’ range? Similar to how LR speakers lose output at distance?

 

[lovinthehd]

Well, OP did say more specifically "Present 2000cft. Gonna move into 4000-5000cft room in 2Yrs. Will be carrying the setup there."

 

[snakeeyes]

Well, OP did say more specifically "Present 2000cft. Gonna move into 4000-5000cft room in 2Yrs. Will be carrying the setup there."

Mabye do 2 stacks of 2 for now?

 

[lovinthehd]

Mabye do 2 stacks of 2 for now?

LOL or just stick to two until ya move.