SKU: 60822452721

LX Upgrade Kit

$202.50 $225.00
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Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 16 - Jul 21

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

LX Upgrade KitUpgrade Your Sierra To Our New Sierra LX! DIY upgrade kit to convert your Sierra 1, Sierra 2, or Sierra 2EX to our new Sierra LX. Sierra LX is a fully Klippel NFS optimized speaker designed for wide and linear dispersion, high power handling, class leading bass extension and punch, and pure listening enjoyment. Detailed instructions are included. If you prefer not to do the work yourself, we would be happy to perform the upgrade for you. Simply give

Upgrade Your Sierra To Our New Sierra-LX!

DIY upgrade kit to convert your Sierra-1, Sierra-2, or Sierra-2EX to our new Sierra-LX.

Sierra-LX is a fully Klippel NFS optimized speaker designed for wide and linear dispersion, high power handling, class-leading bass extension and punch, and pure listening enjoyment. 

Detailed instructions are included. If you prefer not to do the work yourself, we would be happy to perform the upgrade for you. Simply give us a call or send an email for details. 

*Note: 1 kit needed for each speaker.  A pair of speakers requires 2 kits.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 60822452721

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4.8 ★★★★★
Based on 22 reviews
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Product Reviews
B
Verified Purchase
Brian Olson
Omaha, US
★★★★★ 4
Cool as the other side of the pillow
Color: Gray, Size: Queen (U.S. Standard), Set name: Stretchy and Soft
Good quality and keeps cool on side of pillow. Have to flip pillow for constant cooling is the ok only down side. Love the material as it is very soft and silky feel to it. Doesn't wrinkle over pillow and had some good color options. Easy to clean. Fair price for a good product
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 11, 2026
N
Verified Purchase
Nik
Boise, US
★★★★★ 5
Love!
Color: Blue, Size: Queen (U.S. Standard), Set name: Stretchy and Soft
Awesome cases! They really are cool to the touch. I didn’t sleep hot at all. I have a “cut-out” memory foam pillow, and this stretched around it perfectly. It is flexible enough that it doesn’t impede with the cut out. And while the material is “silky,” it doesn’t slide around the pillow while sleeping on it. The zipper feature is perfect. I washed and dried per the tag instructions and they washed very well. Super happy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 8, 2026
J
Verified Purchase
Jane - NY
Bozeman, US
★★★★★ 5
AMAZING - LOVE THESE!
Color: Blue, Size: Queen (U.S. Standard), Set name: Stretchy and Soft
I've been using these pillow cases for more than 6 months and LOVE them. They are well made, no wrinkling, fraying or wearing out, even with a weekly washing. I love the zippers on them, my pillows fits perfectly in the case and don't constantly escape from the case overnight. They definitely perform as described: they keep me cool at night and don't smell and actually don't make a mess of my hair. I bought an extra one and put it on a pillow I keep close to my body which helps me from overheating during the night. They are a great value for the price, I wish I could get top sheets in the same style as these and I'd be in heaven!
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Reviewed in the United States on March 23, 2026
A
Verified Purchase
Amazon Customer
Waukegan, US
★★★★★ 3
Cool Pillowcases
Color: Gray, Size: Queen (U.S. Standard), Set name: Stretchy and Soft
These pillow cases are silky soft and cool to the touch. They don’t stay as cool as I would like, however, so I find myself moving around on the pillow to find a cool spot or flipping the pillow over. I have washed them several times and the coolness seems to be diminishing. Still, it’s better than a regular cotton pillow case. The zipper is needed and helps keep the material on the pillow.
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Reviewed in the United States on August 20, 2025
S
Verified Purchase
Scott Mautino
Massapequa, US
★★★★★ 5
By far the best cooling pillow case I’ve bought highly recommend
Color: Blue, Size: Standard, Set name: Silky
Highly recommend best cooling pillow case I’ve bought very soft and comfortable seems to be made from good material as well
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 3, 2026

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