Mullard KT88 No Cryo Reviews

4.8 Rating 37 Reviews

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909.931.9686

Email:

joel.m@upscaleaudio.com

Location:

2058 Wright Avenue,
2058 Wright Avenue
California
91750

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John Denning

Verified Reviewer

“I like these tubes, because they sound very balanced on my system. I control my soundstaging & tone control with my pre-amp tubes, and I find the Mullards very ameneable to that approch. Yes, I will buy them again........ John”

3 Helpful Report

Posted 2 years ago

Jerry Johnson

Verified Reviewer

“I just replaced the el34's in my Primaluna Prologue integrated w/ the Mullard kt88's. Wow wee ! A friend said " you're probably in the sweet spot" with tubes. My amp sounds better than I thought it would now. Stronger bass , better top end , to my ears anyway. Thank you Upscale. P.S. they look great too.”

3 Helpful Report

Posted 2 years ago

Kenneth Picton

Verified Reviewer

“I replaced Gold Lion KT-88's with these. Overall, I like the sound of the Mullards.”

5 Helpful Report

Posted 2 years ago

Armando Rancano

Unverified Reviewer

“Most tubes need 200-300 hours to truly blossom. However, Upscale's 78-hour burn-in prior to delivery helped these KT88s sound incredibly good out of the box. I have them powering a Willsenton R8 amp. The Mullards most definitely sound better than the stock Willsenton-branded tubes right away. I've had them on all day and can already tell subtle changes. I very much look forward to listening to the amp while the tubes mature. I have Sylvania 6SN7 and 6SL7 NOS tubes in the amplifier and rectification slots. Bass weight and tightness were immediately apparent, as was a smoother, silkier top end. The midrange is holographic and dimensional. Voices and instruments float in air. Orchestral sections are distinct even on densely orchestrated symphonic passages. I had considered the Golden Lions. I use the 300Bs in my Reisong A50 amp. However, there were too many reliability issues reported online for the KT88s to take a risk on more expensive tubes.”

3 Helpful Report

Posted 2 years ago

“The description of the sound of this tube by upscale & the reviews I found to be accurate . I like the sound of this tube in my Mac 275”

Helpful Report

Posted 2 years ago

“Same as above good stuff”

Helpful Report

Posted 3 years ago

GORDON SCHAFER

Unverified Reviewer

“I just received these Mullards, and right after installing and biasing I knew I was going to prefer them to the stock tubes in my new Doge 10 Mk3 integrated amp. Right out of the box they sounded better in every respect than the stock tubes ( which have 300+ hrs). It is awesome that Upscale has already burned them in for 72 hours and am really looking forward to seeing what they sound like after 200 hours and beyond.”

Helpful Report

Posted 3 years ago

“compared to the earlier 6550 tubes in my Audio Research vt 100 the Mullard kt-88s sound a little more musical and slightly warm. Looking forward to MBL 126's in my system and how the 88's serve with them. thnx John Cocks”

1 Helpful Report

Posted 3 years ago