KAB Turntable Accessories
KAB Speedstrobe - $109.00 US / $ 143.00 CDN
If you have a turntable, you should have one of these. It's highly accurate, simple to use and inexpensive.
The KAB SpeedStrobe was designed to replace and improve upon older strobe designs that relied on power line frequency. KAB also wanted something that was easier to use and included the ability to actually measure small amounts of error. Not just a go - no - go - test.
The KAB SpeedStrobe features a quartz locked illuminator with 99.99% accuracy. And since it is battery operated, it works everywhere. No need for 50 or 60 Hz versions. The Disc is silk screen printed on durable 20 mil PVC.
Instead of hypnotic bars, the KAB SpeedStrobe features the actual speed numbers. In use, the desired speed is read directly from the disc. no searching for the right band. Covers 16.66, 33.33, 45, 70.59 - 90 RPM. By timing the drift of the display over one minute, accuracy can be measured to 0.03%
KAB Rumble / Subsonic Filter - $79.95 US / $105.00 CDN
The KAB Great Sound Escort RF-1 is a very fine transparent rumble filter that not only suppresses very low frequency (subsonic) energy, but also uses a unique active cancellation circuit that effectively suppresses vertical rumble too.
If you are noticing large big speaker cone movements when playing your vinyl, and think a better turntable will help? It may not! This very low frequency energy is called rumble. Much of it is actually cut into the record groove when the master disc was made. But the main source is feedback exciting the natural stylus/arm resonance between 7 and 12 Hz. This produces a slow easily visible in and out motion of your woofers. If you cannot see this motion, the RF-1 will not solve your feedback problem. If you can see this motion, the RF-1 will solve your feedback problem.
With rumble eliminated, the soundstage becomes more "still" and the bass actually tightens up because the woofers are no longer modulating and the power amp is no longer wasting current resources on sub-audible noise.