FV15HP Clipping

[herbu]

If you want really good effortless natural bass, it really does require a huge enclosure, and I mean huge compared to what most people would tolerate.

FV15HP is 18"(W) x 24" (H )x 24"(D)
PB13U is 20.5"(W) x 22.5"(H) x 27"(D)

Big enough for "really good effortless natural bass"?

I wonder if Rythmik and SVS compromise on size for consumer acceptance. Would these 2 subs be better if the cabinets were bigger?

 

[AcuDefTechGuy]

I don't think it is the amp making the click, but the driver exceeding xmax.

If you look at the measurements, that sub is operating close to the wind. For that reason, the AH reviewer did the measurements with the limiter on.

The review shows notching by the limiter at points where you would expect high cone excursion. I suspect the need for the limiter is due to this servo Eq system. Rhythmic are not very forthcoming about the real details. I have not tried to find the patents yet.

In general any type of bass Eq to a ported box is problematic.

I suspect the idea, is to use a Qb3 box rather then Qb4. This gives you a smaller box but a higher F3 and of course lower efficiency. Then the bass is extended by this Eq servo system I suspect. I could be wrong about this, as I said details from Rythmic are scant. In any event I suspect one of many schemes to try and get the proverbial Quart out of a pint pot.

If you want really good effortless natural bass, it really does require a huge enclosure, and I mean huge compared to what most people would tolerate. However, if you have long conditioned the WAF, I can assure you there is nothing like it!

In this case, do you think the problem (clicking) is secondary to having too MUCH power respective of the DRIVER capability?

IOW, if the power output were limited to 250W instead of 500W, the driver excursion would not exceed it's limit?

 

[crossedover]

FV15HP is 18"(W) x 24" (H )x 24"(D)
PB13U is 20.5"(W) x 22.5"(H) x 27"(D)

Big enough for "really good effortless natural bass"?

I wonder if Rythmik and SVS compromise on size for consumer acceptance. Would these 2 subs be better if the cabinets were bigger?

Think about a folded horn or a tl subwoofer. the enclosures are huge and by design do not require the driver to be pushed to crazy xmax to achieve great bass. The DTS 20 from Danley is 87 x20 x 18, the tuba from Fitzmorris is 72 x 36 x 36... Now will most spouses put up with those monsters probably not

 

[TLS Guy]

In this case, do you think the problem (clicking) is secondary to having too MUCH power respective of the DRIVER capability?

IOW, if the power output were limited to 250W instead of 500W, the driver excursion would not exceed it's limit?

There is not enough data to answer your question. However obviously as you use less power the less likely the driver is to exceed xmax.

 

[TLS Guy]

Think about a folded horn or a tl subwoofer. the enclosures are huge and by design do not require the driver to be pushed to crazy xmax to achieve great bass. The DTS 20 from Danley is 87 x20 x 18, the tuba from Fitzmorris is 72 x 36 x 36... Now will most spouses put up with those monsters probably not

Yes, that is exactly what I'm getting at. My TLs don't even use sub drivers. However in pleasing the grandchildren, I have hit everybody hard in the chest with shock waves, and really shaken the room and never run a driver out of xmax. In fact you barely see the drivers move. It is all about acoustic transformation and room coupling.

Basically there is a good reason a double bass is the size it is and the large bass organ pipes. In the domestic arena it is all about making do with less unfortunately. I'm just the odd nut that designs and build speakers, where the size of the speaker is dictated by physics alone.

 

[TLS Guy]

FV15HP is 18"(W) x 24" (H )x 24"(D)
PB13U is 20.5"(W) x 22.5"(H) x 27"(D)

Big enough for "really good effortless natural bass"?

I wonder if Rythmik and SVS compromise on size for consumer acceptance. Would these 2 subs be better if the cabinets were bigger?

Crossedover has explained very well in a post below what I'm talking about.

 

[AcuDefTechGuy]

BTW I did watch Serenity again yesterday. The bass is definitely hot. But I don't think any hotter than GI Joe Retaliation or some other movies. Actually I think GI Joe Retaliation may even hotter on the bass.

You know what else is hot on the bass? Red Dawn 2012. I think the movie is pure crap and NOT even worth renting. But the bass is freaking over the top. Definitely keep the limiter on for this movie or else safety not guaranteed!

 

[JohnnieB]

Alright TLS, I give, where do I find info on those speakers. Google was dumbfounded, frankly, so am I.

 

[crossedover]

Alright TLS, I give, where do I find info on those speakers. Google was dumbfounded, frankly, so am I.

Which ones? if your talking about his, they are DIY self built.

 

[TLS Guy]

Alright TLS, I give, where do I find info on those speakers. Google was dumbfounded, frankly, so am I.

You mean these?

They come from Blood Sweat and Tears!

 

[afterlife2]

However in pleasing the grandchildren, I have hit everybody hard in the chest with shock waves, and really shaken the room and never run a driver out of xmax.

Thanks for making me laugh this morning TLS.

 

[Hi Ho]

Herbu, does your clicking sub sound anything like this?

https://www.youtube.com/watch?v=xR1fL-_hFyo

My Rythmik sub recently started doing that during low bass. I changed the filter to 30 and the damping to high and I still have the problem. My amp doesn't have a limiter switch on it.

 

[herbu]

Herbu, does your clicking sub sound anything like this?

Nope. Nothing like that. Mine was usually just a single click, sometimes 2 or 3, but always coincident with a thunderous boom or crash. The click itself sounded like one of those little clickers we used to drive our teachers nuts with.

 

[JohnnieB]

Thanks tls. Those are absolutely beautiful.