Addicted To Audio - Home Audio Electronics & Accessories

Fostex RPKIT50 Regular Phase (RP) Stereo Headphone Assembly Kit

Fostex RPKIT50 Regular Phase (RP) Stereo Headphone Assembly Kit - Main image
$286.3 $409 In stock

Category: Cat_All Headphones

RPKIT50 is a headphone assembly kit employing flat drive diaphragms that uses proprietary RP (Regular Phase) technology.

This product is to assemble a pair of headphones employing "RP diaphragm" that is uniquely developed using our RP (Regular Phase) technology. You can enjoy your own favorite sound by combining various parts to adjust the sound to make it for music listening or monitor headphones specific to music production.

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Delivery costs

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.2 / 5 · 5 reviews)

Ella P. ★★★★★

The flat drive diaphragms deliver a clarity I've never heard before, and assembling the kit myself made me appreciate the engineering even more. Was nervous about the build, but the instructions were clear enough to get it right on the first try.

Penelope C. ★★★★★

Putting this kit together was a rewarding challenge, and the result is a pair of headphones with that signature RP driver clarity I was hoping for. The flat diaphragm really makes a difference in the soundstage depth—it feels much more open than my usual dynamic drivers.

George ★★★★☆

Getting the RP diaphragm seated properly took a few tries, but once assembled, the clarity and speed of the soundstage are genuinely impressive for a DIY kit. My only small wish is that the included earpads were a touch plusher for longer listening sessions.