||Cain (AVS member)
I've auditioned and owned many different subwoofers.
The better subs do a good job of adding the lowest octaves of
sound, so one can instantly notice when they are turned on. The
F25 Rythmik Audio subwoofer is significantly different (from every
other sub I've heard). The F25 is completely transparent and does
not "sound" like a sub at all. I often have to check
to determine whether or not the F25 is functioning. The F25 quite
simply improves the sound of your main speakers (and my main speakers
are +- 1 dB down to 36 Hz.)
I've never heard recorded low frequency sound this clearly or
cleanly whether it be an organ, the lowest notes on a grand piano,
bass guitar, or the bass sounds in a well recorded movie. For
music, I can hear the articulation of low frequencies clearly
and distinctly without being overbearing or sounding soft/slow/muddy.
For movies I can feel, the power and emotion the Director intended
for the audience to hear - and experience.
What I wanted was bass that was authentic, not overpowering,
that was fast, hard and responsive. The F25 delivers these qualities
Your initial listening session may at first seem underwhelming
because it takes a little time to 'unlearn' years of listening
to traditional subwoofers. My advice, listen to some of the best
recorded most dynamic uncompressed music you own, and the difference
between this subwoofer and every other one you have heard before
will become obvious.
My long search for new subwoofers is finally over.
-- J. Cain Dual F25 owner
||Willscary (AVS Forum)
Well, here's my deal...
I am trying desperately to build a theater in the basement of
my home. I now have everything other than the screen. Unfortunately,
I have had no time for building, so the project is falling behind.
As far as being properly calibrated, I have never used REW or
any other program, but I am quite adept at using the BFD.
What I can tell you right now is that I was very pleased with
my SVS 16-46PCi. A single F25 absolutely blows the SVS away! The
difference is incredible.
The SVS plays deep and relatively clean compared to older subs
I had. The Rythmik takes everything to a completely different
level. I hear tiny nuances in deep bass that I had never heard
before. Others use descriptions such as "cleaner" and
"more articulate". These are good descriptions, but
for me, it does not do justice to the difference in sound. The
F25 (single as I have not hooked up the second) is different.
The bass is there, it is not weak. It is also not boomy or muddy.
This goes well with other descriptions. However, the best way
I can describe it is...it is as if a veil has been lifted allowing
the sound to be more natural and realistic. "Fast" and
"Tight" are also words used to describe the sub. Again,
good descriptions, but these do not go far enough.
OK, just a quick idea of what I am trying to convey...I am a
fan of Johnny Johnson. Johnny was a tremendous piano player who
was probably best known as being Chuck Berry's piano guy. Very
late in his life, Johnny created some masterful CDs with other
musicians. On one such CD, there is a bluesy track with really
exceptional bass. I have always loved this track, but now, it
sounds different. The pluck of each bass string can be clearly
heard. Not just the pluck of each different note, but the fingers
on the strings, the accompanying tones that the sliding skin on
the steel strings creates...in perfect time. Don't get me wrong,
the old SVS allowed me to notice a bit of this definition, but
with the F25 it isn't just noticed when trying to hear it, it
presents itself front and center in a way that makes me wonder
how I went all these years without hearing this reproduced on
my equipment. I am VERY familiar with this music and it sounds
completely different and much better to me now!
I don't know if this is the holy grail of subwoofers for me.
I do know that it is a real eye opener. I was very happy with
my decade old SVS and I am in total awe of the F25's ability to
wring so much more music out of the same recordings and equipment
that I have owned for quite some time.
I will give you more of a description after the new year when
hopefully I will be set up in the basement!