Mullard KT88 No Cryo Reviews

4.8 Rating 37 Reviews

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Phone:

909.931.9686

Email:

joel.m@upscaleaudio.com

Location:

2058 Wright Avenue,
2058 Wright Avenue
California
91750

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Gordon Schafer

Verified Reviewer

“I am not sure how to rate this. I purchased it to replace one in my amp that was having issues biasing the set of 4, and then a fuse blew. I did a startup fuse check and found one that would not start up. Replaced it with this new one. The amp will start up and play for a while then the protection circuit shuts it down in the same way as before, repeatedly. I have two other sets of power tubes that work fine but I prefer the sound of the Mullards. So there is still some kind of issue with them. That being said I do love these tubes, but for me the reliability has been an issue, and it sucks having to replace the whole set after about 1000 hours. BTW upscale as always did a great job with the purchase and shipping.”

3 Helpful Report

Posted 1 year ago

Patrick Cashmore

Verified Reviewer

“Rolling the KT88's into the El34 sockets was quite startling. The first standout in my Prima Luna was the power increase, and to my ears a little more color over the 34's especially in the top end. I am now eagerly awaiting my Rega P10 with the Aphelion 2 that Kat is setting up for me.”

3 Helpful Report

Posted 2 years ago

Frank Brothers

Verified Reviewer

“I run my Prima Luna Prologue Two with Mullards KT88. In one word, sophisticated. Smooth response throughout the frequency spectrum. Thumpy, quick bass, glassy highs with no sibilance, balanced mids. Just a touch warmer than Gold Lions. Can't say enough about how refined these tubes are.”

4 Helpful Report

Posted 2 years ago

Joshua Wright

Verified Reviewer

“The Mullard KT88 replica is a very good-sounding tube. The tube produces a full pallet of fleshed-out tones, details, and frequency extremes without sounding dull or harsh. It is everything I was expecting and allows my Audiopax Model 88s to shine as they should.”

2 Helpful Report

Posted 2 years ago

Thanks for your review, Joshua! Mentioning your amps will really help others on their tube-rolling journeys.

Posted 2 years ago

Richard Potekin

Verified Reviewer

Author didn't leave any comments.

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Posted 2 years ago

Lawrence Lanes

Verified Reviewer

Author didn't leave any comments.

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Posted 2 years ago

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Posted 2 years ago

Michael Black

Verified Reviewer

“I purchased these to replace and allow me to save my Prima Luna branded tubes. I prefer EL34 tubes; these do have a little more base, but not very much.”

3 Helpful Report

Posted 2 years ago