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woofer pumping

Today I tried to play some vinyl through my new setup (Dynaudio C1 speakers and VTL MB-450 amps/VTL 5.5 pre) and I noticed a large amount of woofer pumping (Whenever I listen through the CD player or Squeezebox the woofers barely move at decent listening volumes).

My turntable is a Technics SL1200, cartridge is AudioTechnica 440 MLa and the phono pre is a Cambridge Audio 640P. Nothing fancy but the woofer pumping is worrying me and I'd like to reduce it. It's currently sitting on an Ikea Expedit so it's not the best for isolating vibration since just tapping it immediately makes the woofer travel more.

I was thinking of getting a 4" maple platform from Mapleshade with the Isoblock footers. Any other suggestions?
jibbonacci

Showing 2 responses by apachef1

apachef1
164 posts
 
I would invest in a decent audio rack to start. Any subsonic filter switch on your phono pre? I'm gonna say you're getting feedback from the speakers being on the Ikea furniture. Being a direct drive TT will also add to the situation. Isolation is gonna be key.

How big is your listening room?
apachef1
164 posts
 
IT SHOULD HELP BUT REALLY IT SOUNDS LIKE THE ROOM AND SETUP MAY BE ON THE SMALL SIDE. THE TT IS MOST LIKELY PICKING UP SOUND WAVES IN THE ROOM.

I CANT COMMENT ON THE BENEFITS OF A 2" VS 4" PLATFORM FOR YOUR TT. IT COULD BE SITTING ON A SLAB OF CONCRETE AND THE TT WILL STILL PICK UP SOUND WAVES IN YOUR ROOM.

START WITH THE 2" AND HOPEFULLY IT WILL TAME IT DOWN ENOUGH FOR YOU TO LISTEN TO YOUR VINYL UNTIL YOU MOVE INTO THE NEW SPACE

DIRECT DRIVE TT ARE NICE AND EAST TO USE BUT YOU DO END UP WITH SOME SOUND QUALITY ISSUES FOR THE ADDED CONVENIENCES
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