HELIX Ci7 T20FM-SC - 0.75 inch / 20 mm high-end silk dome tweeter with coupling volume, FlexMount20 technology and neodymium magnet

HELIX Ci7 T20FM-SC - 0.75 inch / 20 mm high-end silk dome tweeter with coupling volume, FlexMount20 technology and neodymium magnet

Marsoni

M251S

$325.50

Get it in 3 business days with 1 day shipping. Friday, May 29

HELIX Ci7 T20FM-SC - 0.75 inch / 20 mm high-end silk dome tweeter with coupling volume, FlexMount20 technology and neodymium magnetHELIX Ci7 T20FM SC HELIX COMPOSE. The perfect speaker for any composition. Born out of the increasingly demanding challenges of modern automobile technology and the HELIX typical pursuit of intelligent solutions, we made the progressive redesign of proven universal speaker systems our mission. The result: our innovative HELIX COMPOSE platform that, according to the motto "developed inside the vehicle, for the vehicle", combines classic universal

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Bought three of these for my home office. Two for Synology NAS drives and one for a Mac Studio. The size ranges make this the perfect product to get everything off my desk. A little difficult to install with the desk upright so I suggest turning it on its side or over completely. In my case, I have these in sit stand desks which is great.

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Reviewed in the United States on December 24, 2025

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William Lech

Natrona Heights, US

★★★★★ 4

Decent bracket, Non-beveled screw holes cause complications

The screws that secure the mount to the underside of the desk stick out enough to cause the inner dimensions to change. I had to use the next hole down to increase the size of the bracket to accommodate my device, resulting in a less secure mount than desired. If the holes were beveled so that the screws fit more flush with the mount I'd be able to give it 5 stars. But the inner dimensions are not entirely as advertised due to the screws. Quality is up to standard otherwise, installation is relatively straightforward, price point is fine for a bracket of this size.

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Reviewed in the United States on September 18, 2025

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Kris

Chelsea, US

★★★★★ 5

Great mount!

Great under desk NAS mount. Adjustable and sturdy, easy to install. Worked well for my Qnap TR-004 four slot DAS. I used 5/64 drill bit for the holes. Since my desk has a rear lip I reused rear stopper bit as a headphone hanger. I bend it slightly to a hook shape.

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Reviewed in the United States on May 6, 2025