SKU: 40041638374

Ray Tubes Select 5U4

$82.80 $92.00
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  • USA
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Ships within 48 hours · Estimated delivery Sep 4 - Sep 9

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Description

Ray Tubes Select 5U4Ray Tubes Select 5U4 5U4 full wave rectifier, twin diode. Power supply rectifier that influences amplifier character. Select tier. The Ray Tubes Approach Ray Tubes was created specifically for the audiophile and hi fi market not repurposed industrial tubes, not rebranded commodity production. They partner with manufacturers to build tubes to audio specific specifications, then subject every batch to QC that includes both electrical testing and

Ray Tubes Select 5U4

5U4 full-wave rectifier, twin-diode. Power supply rectifier that influences amplifier character. Select tier.

The Ray Tubes Approach

Ray Tubes was created specifically for the audiophile and hi-fi market — not repurposed industrial tubes, not rebranded commodity production. They partner with manufacturers to build tubes to audio-specific specifications, then subject every batch to QC that includes both electrical testing and listening evaluation by sound engineers. The Select tier represents the results of that process at an accessible selection standard.

Press Recognition

Ray Tubes is a newer brand without extensive press coverage yet. Our own evaluation and customer feedback in amplifier applications has been consistently positive — comparable in character to better NOS options at a fraction of the cost.

Specifications

  • Tube type: 5U4
  • Production: New production to Ray Tubes specifications
  • Quality control: Electrical testing plus listening evaluation
  • Tier: Select
  • Pricing: Per pair

Questions about matching these to your specific amplifier, or which tier is appropriate for your application? Reach out.

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: 40041638374

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4.7 ★★★★★
Based on 24 reviews
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Product Reviews
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Verified Purchase
William Turner
Lowell, US
★★★★★ 1
Their other flavors without fizz are great...but not this one (My honest opinion).
Now I know why this one was so cheap! The taste was not pleasing to me at all... I threw it away. However, I do love their other lines, with the berry flavor being the best! Orange is good too but to obtain the best flavor, 2 spoons are required (for me anyways). Also, the berry flavor (while only taking 1 spoon) is even better tasting if you add a little lemon juice to it. Finally, I read that adding lemon juice to water helps to prevent kidney stones! Who knew! This is a good product but I think they went to far trying to add "fizz".... the effect was negative while the previous products are great!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 26, 2025
G
Verified Purchase
Green cam
Cuba, US
★★★★★ 5
Fizzing fiber drink
This is a great tasting fiber drink, plus added vitamins..
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 10, 2026
L
Verified Purchase
LC
Draper, US
★★★★★ 5
Best one yet
Best tasting Metamucil if you enjoy carbonation. Less sweet than regular (even the no added sugar version felt a bit overly sweet to me). Lemonade is a close second but a bit too expensive. Wish it would come with a scoop but I saved one from a different product and dropped it into the jar here.
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Reviewed in the United States on January 25, 2026
L
Verified Purchase
Lucky
New York, US
★★★★★ 3
Great product, dislike new 43oz size
Works well. Prefer the “fizzy” formula over all others. I recommend adding powder to your cup, fill 30-50% with cold water, then use a small handheld milk frother to blend. It’ll “foam” then settle, add you can add more water. (If you fill the whole cup with water right away it’ll overflow when it foams up.) I prefer to drink it quickly, before it starts to thicken into a heavy gel/paste. 3 star rating for 2 reasons: 1) Strongly dislike the food coloring! 2) They recently changed container size and shape. It used to be a 29oz cylinder, now it’s 43oz and more like a tub. The new format is too large for my kitchen vitamin drawer + too wide and heavy to grab with one hand. (I’ve included side by side pics here - didn’t think to take them until I’d already removed the 43oz label for recycling.) I saved my last 29oz canister and I’ve been decanting powder from the 43oz, keeping the 43oz in pantry storage.
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Reviewed in the United States on March 26, 2026
T
Verified Purchase
Tereca
Boise, US
★★★★★ 5
Great product
I have been using Metamucil for a long time! I can tell a difference in using the plain and the vitamin variety. I feel a more energetic. I will not use this variety close to bedtime. It does fizz a lot. Only add a small amount of water to the glass and after the fizz settles down add more water. Great product!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 22, 2026

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