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  1. #1
    Join Date
    Nov 2014
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    3

    Default Rythmik F8

    Hi guys. Fairly new to the Ascend product as I have just received a pair of Sierra1 Nrt's and Sierra 2's to audition. I'm "new" to the audio world although I've been listening to and playing music all my life.

    I'm planning to pair a sub with the pair of Sierra's that I end up keeping...so I'm doing a little research. I'm definitely going with a Rythmik sealed sub. For the foreseeable future I plan to run a 2.1 set-up. Maybe upgrade to 5.1 in the future....maybe. I don't need or want drywall-cracking power. I just want to sufficiently add the low frequencies to my music. My room is fairly good size, about 18x26x8.

    I saw that Rythmik has a dual 8" sub that has the ability to crossover up to 250hz. Is there any advantage to crossing that high with a speaker like the Sierra? My limited audio knowledge tells me that it would allow the Sierra to better reproduce the >250hz frequencies, taking some "burden" from them. Please tell me if this is completely wrong!

    Jason

  2. #2
    Join Date
    Mar 2011
    Location
    NW Pennsylvania
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    696

    Default Re: Rythmik F8

    I think most of the time people use a 60 or 80hz crossover with the Sierra's. That relieves much of the strain of the lower frequencies while the Sierra's still play the frequencies that are directional. I would think for your larger room an F12 or F15 would be suitable. A second identical one could be added in the future if needed.
    Nate

  3. #3
    Join Date
    Aug 2003
    Location
    USA
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    5,538

    Default Re: Rythmik F8

    Quote Originally Posted by natetg57 View Post
    I think most of the time people use a 60 or 80hz crossover with the Sierra's. That relieves much of the strain of the lower frequencies while the Sierra's still play the frequencies that are directional. I would think for your larger room an F12 or F15 would be suitable. A second identical one could be added in the future if needed.
    The idea of running the subwoofer into the 200Hz range is only recommended when you are using small satellite speakers. With Sierra-1, you should be using a crossover point between 60-80Hz. The Sierra-1 speakers will do a much better job of reproducing the directional frequencies than any subwoofer (80Hz on up). You would only use such a high crossover point when the speakers are not capable of accurately reproducing these frequencies...
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    Good Sound To You!

    David Fabrikant
    www.ascendacoustics.com

  4. #4
    Join Date
    Dec 2012
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    220

    Default Re: Rythmik F8

    I'm really not sure why Rythmik decided to build those F8 subs unless there are enough people with tiny **** acoustimass-type satellites that require sub extension that high. I was thinking it might be nice to have a smaller footprint, but the F8 doesn't save much space compared to the F12.

  5. #5
    Join Date
    Aug 2003
    Location
    Manhattan Beach, California
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    Default Re: Rythmik F8

    Quote Originally Posted by bkdc View Post
    I'm really not sure why Rythmik decided to build those F8 subs unless there are enough people with tiny **** acoustimass-type satellites that require sub extension that high. I was thinking it might be nice to have a smaller footprint, but the F8 doesn't save much space compared to the F12.
    I was wondering the same thing...and if that was the case, why not a single 8"? In no way could a little satellite speaker keep in output with a dual 8".
    -curtis

  6. #6
    Join Date
    Dec 2014
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    52

    Default Re: Rythmik F8

    Back from my car audio days, me and my buddies would always run 2 X8 in a sub enclosure. People were always shocked how clean, hard and deep they would hit. I can definitely see were this could come into play especially for music in the home as well, were you want that type of bass. From the F8 specs they go pretty low as well. Would be quite interesting to hear them in person. In my dream home theater setup, if I had unlimited funds, I could see putting one of these on each channel, and then a bigger Rythmic dedicated for LFE, drool!!!!!

  7. #7
    Join Date
    Nov 2014
    Posts
    3

    Default Re: Rythmik F8

    I appreciate the info guys! I'm heading the F12 route BTW.

  8. #8
    Join Date
    Oct 2012
    Posts
    130

    Default Re: Rythmik F8

    So what spl can we expect from this sub at 20hz vs the f12? Above 90db? 110db?

    I never understood the freq/spl graph on product pages

  9. #9
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    Aug 2003
    Location
    Manhattan Beach, California
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    Default Re: Rythmik F8

    Quote Originally Posted by eliwankenobi View Post
    So what spl can we expect from this sub at 20hz vs the f12? Above 90db? 110db?

    I never understood the freq/spl graph on product pages
    The FR graphs on the product page are much like the FR graphs on Ascends' speaker pages. They don't show max SPL, they show linearity.
    -curtis

  10. #10
    Join Date
    Oct 2012
    Posts
    130

    Default Re: Rythmik F8

    Quote Originally Posted by curtis View Post
    The FR graphs on the product page are much like the FR graphs on Ascends' speaker pages. They don't show max SPL, they show linearity.
    Thanks. Thats actually part of the confusion.

    I remember asking on a forum about a sub that was less than $300, supposedly reached 20hz... Then the response was "yeah but at what spl?."

    I said: good point.

    Hence my question here.. I am not doubting it is a good sub. I more than understand that extension alone is not a the most important element when choosing a sub. I am particularly intrigued by the comments on its transient response... But would like the confirmation.. At this price point, it is good competition against Rythmik's own F12 and SVS SB-2000 as far as sealed subs go. The sb-2000 shows its capable of ~ 96db spl at 20hz. Also, Ascend speakers also show spl level of 85 db for freq response graph on Sierra-2, -1 and 90db for the towers.. I believe this is absolute spl levels in a semi anechoic environment.... But Rythmik graphs show this +20 , +5 and -20 db on the spl scale and I don't understand what would be the 0db reference volume...

    Can this be clarified?

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