Buy High Pass Filter or KAB RF1?

Thank you very much. It either buy the KAB or buy a preamp with rumble filter I guess. I was thinking of possibly the pro-ject tube box S2 if I don’t go the KAB route. 

I need it because the cones on my two speakers as well as the woofer on my sub are modulating very badly when playing phono. 

Also, how do most people have the KAB hooked up?

I biamp my speakers so it would have to be between the TT cables and the Marantz Preamp Processor for my system.
The problem is that this means that I will need rca cables for between the other side of the KAB to the Marantz phono inputs right?  Maybe they sell 6” pigtails.

Thanks Stereo5. Yes, it’s quite frustrating the number of people who say to relocate the table when they know a TT has about two feet worth of phono cable length to work with. There are only so many relocation options. 
On other threads I have asked questions like...what does everybody like better A or B....and everybody seems to want to give C as the answer. Lol 

I have already determined I am getting some sort of rumble filter to try no matter what anybody says, because the problem can come at an instant when I am showing my system like last time I had guests and I want to be prepared. 
I will probably get the KAB and then buy an Atoll phono preamp because they are my favorite sounding audio company. 
I just hope having the KAB and the Atoll feeding into a line input in my Marantz isn’t going to be too many connections.

Do you think it will? 

So I called the company and the guy said the $22 passive version is pretty much just a high pass filter and would technically make an audible difference. He said they have an active product around the same price as the KAB now where you can’t hear the difference when using it. 

I just ordered the KAB. I can’t take this anymore. lol 

Rega thinks it’s a cartridge mismatch but my cartridge only weighs 2 grams more than the one that comes with it and the compliance is spot on I think. 
I think the needle is picking up feedback from the speakers.

being new to this stuff I found that people have an argument that doesn’t make sense. They ask why a filter is necessary and act like it’s a band aid. Yet, these same people will tell you that even rumble that you can’t hear is bad for your system. So that means their systems may be rumbling and they don’t even know it. Why not have this in the system to protect it if nothing else. I haven’t heard one person say it degrades sound. 

Guys,
I may have figured it out and I would like to get your opinion. The P3 mass is 11 g. My Nagoaka MP-110 cartridge is 6.5 g with only a 6 for dynamic compliance. Using an online calculator this puts the resonant frequency at a 15-16 Hz!I believe it’s supposed to be around 10 Hz correct?
Do you agree this is most likely my problem?

Lew,

Thanks for the tip. The ultimate goal is to buy the Atoll phono preamp and put the KAB on the back side of it before it goes into a line level input of the Marantz.

i have a 5 channel amp that feeds my front two speakers and my sub has its own built in amp. 
The crossovers in the front two speakers are built into the speakers and the crossover that controls the sub is in the Marantz. 
There is only one line feeding the sub so I’m not sure how I would connect this just to the sub.

Do I need to wait until I receive the outboard preamp or is there a way to Connect in the meantime? 

Great insight on the y connector Al!

Also, I cancelled the order for the KAB because I now think it’s a cartridge incompatibility issue with my light tonearm since the dynamic compliance of the cartridge is a mere 6 causing the cartridge resonance to be 15-16 Hz.

It looks like I will be on the hunt for a new cartridge first. 

The weird thing is why are my front speaker drivers rumbling too when signals below 80 Hz are being sent to my sub?

Ok thank you so I am in compliance. Plus Rega told me people use this cart with my P3 all the time. 
Will a KAB fix a feedback problem? Just curious. 
I thought rumble could be caused by feedback but I have somebody telling me a filter wont fix feedback.

My woofers DON’T flop with the volume turned down. 
It started out of nowhere on my AJA album Black Cow. Something wasn’t right so I switched to Led Zeppelin II and it was rumbling on that too!

Thanks Brandon I’ll stay in touch! I just saw your first post. This is crazy isn’t it?

im now thinking about buying the out board pre amp first so I can get the table away from the speakers and see if it’s a feedback issue. 
I have also heard that you can buy a test record that will help to identify the problem but it’s like $50.

i also saw in another similar thread that if you turn on the turntable but don’t play the record and then crank the volume way up that if the speakers pump it’s a feedback problem. 
Finally somebody told me if it’s a feedback problem that a filter won’t work but I thought that “rumble” = “feedback” problem.

i am convinced a simple passive filter will hurt sound since the designer of one mentioned in this thread told me it technically does. He said whether you hear it or not is another story. I have also read that while an active filter may not degrade sound it may throw the bass out of phase. 
I thought I was simply just going to buy a record player and spin records a couple months ago. Lol 

Oops sorry I forgot to check your question Al. When I get home tonight I will play a record without the sub and will report back!

Thanks for reading my manual!

There was only one time there was audible noise that came from one of my front speakers, but it’s pretty much just noiseless extra flapping of the cones and woofer. 

Ok Al I moved the fronts forward of the turntable and it appears only the subwoofer sitting next to the TT is rumbling now.

When I turned the Sub off there was no rumble present.

Is it safe to assume that the rumble in the Sub is feedback?

I am giving my boy a bath right now but I can try to relocate the sub to see if it all disappears. 
One thing is for sure, I need to buy an outboard preamp so I can get rid of that phono cable extender. It’s horrible. I’m surprised so many people have recommended to just extend it. The hum is so bad it’s not even listenable. Rega seemed adamant that it’s a certain length for a reason. I’m a total believer now.

Update: I also moved the sub farther away and now I have no rumble whatsoever. 
I kept being told to move the table but being limited with existing ICs the way to go for me was to move all of the speakers. 
I’m happy that I won’t need a rumble filter now. 
The question now is whether buying an outboard phono preamp like the Atoll P200SE will make an audible difference because my Marantz AV7704 sounds pretty damn good and I can’t imagine it getting much better. Thoughts? Will the difference really be audible?

Thanks guys!
I can’t wait now to try the Atoll. I feel that the Marantz AV7704 is the best bang for the buck for new audiophiles who aren’t rich. Coupled with the right amp it sounds great. It sounds industrial and horrible with my Anthem A5 but beautiful and detailed with my Atoll. I’m sure the ribbon tweeters on my speakers help too.
I am a musician and a drummer, so I definitely have an ear for sound and can tell the difference quite easily.

Gotcha thank you Al. I ordered the Atoll today from Canada. I figured it was worth a try because I have never heard magic before like what comes from my Atoll amp. I figured they must know what they are doing to some degree. You would know better than I, but my experience so far is that more expensive may have a better chance of being better, but more expensive doesn’t always mean better. I think I have said it before but my $4500 Anthem A5 sucks! Lol 

Indeed ieales, indeed. I’m going to try the Anthem as driving my Atmos and surrounds in the theater room I am building in the basement, and use an Atoll for the fronts down there.

I also have an Atoll upstairs for my record player driving my two Monitor Audio Golds. Soon I will have the Atoll phono preamp.

I have two Marantz AV7704s, one for each room.

Crap the rumble is back just on the subwoofer, and only when it’s turned up past 10 o’clock. 
I’m assuming if I put a single passive high pass filter on the sub it’s my best option for hurting sound the least other than buying the KAB and getting a Y connector.