Cromolin Vibration Control Strips
The Bimetallic connection
And that, in short, is the whole story behind Cromolin Vibration Control strips from Media Access, the good folk who brought us Needle Nectar some months ago. Boss man, Paul Wakeen sent me a sample of Cromolin VC (not to be confused with the cleaning product named Cramolin) and suggested I try it. The product comes in a package of three adhesive-backed pieces measuring 1 3/8" by about 6 inches. According to the white paper enclosed, written by Don Wadia Moses, the strips are made of Cromoloy alloy and are an example of constrained layer damping at work for the world of audio. He cites some very high-tech applications, like the Nashville Network's rubidium plasma atomic clock. He claims that the resonance and microphonics problems with this studio master clock were eliminated by the application of Cromolin VC strips. Impressive indeed, and so are the before and after scope traces represented.
Constrained layer damping in
I finally decided to cut one of the strips into little pieces and stick them to the chips in my humble NAD 502 CD player. I found that kitchen scissors work very well for this task. I went for baroque and stuck the cuttings on every chip in sight. I even managed to get a good-sized one attached to the laser housing.
I plugged the NAD into my recently re-tubed, refurbished Fisher 500B receiver with two meters of Kimber PBJ. The Quad ESL-57s were already warmed-up, so I selected a CD at random and listened. The bimetallic strips are said to facilitate the transfer of vibration away from the chips in the form of heat. I think it works. I immediately noticed improvements in the sound of my CD player. It seemed a bit sweeter and a bit more relaxed on discs like Holly Cole's Don't Smoke in Bed (ALERT 2Z 81020). I'm sorry that I can't be much more specific than this, but the resolution level of this system (and it is intentionally non hyper-audiophile) just doesn't allow for absolute blandishments. Now, I suppose I could have stuck one of those Cromolin VC cuttings on the body of my Lyra Lydian, but there are some things I'm just not prepared to do for Audiophilia, and that's one of them.
After many weeks, I began to feel that my experiment with constrained layer damping had certainly done no harm, and might very well have improved the sound of my CD player. I knew that the flimsy top case of the player had to be resonating. So after a good listen to a CD that's been getting a lot of airtime on the CBC radio network, La Luna by the Canadian Guitar Trio (Skylark 9802 CD), I popped the hood on the NAD and adhered a whole six-inch strip of Cromolin centered diagonally across the inside of the top cover. The Trio likes to let their guitars ring rather freely. They play a mixture of classical and South American arrangements with plenty of percussive effects. Musically, things can get rather busy between the three guitars and their composer friends on percussion. In back-to-back listening to the first three cuts, I found a definite improvement in the clarity of instrumentation and percussion. There was slightly improved depth, less glare, and lower string passages were no longer muddled. There was indeed a significant overall improvement.
Vibration Control Strips
Distributed by Media Access
2660 City Road D, Woodville, WI, 54028, USA
phone: (800) 830-1575
e-mail: firstname.lastname@example.org, web: http://www.mediaacc.com
Price: $69.95 - package of 3 strips
Source of review sample: Distributor Loan
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