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One of the original tubes went down so I had to decide which set to choose. I ended up on this and of course they work but also I have the impression that I hear less noise than before. Whatever the case, it is a good recommendation in a good price!
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PV
Serious upgrade
Paul VIGKOS 15.11.2023
The blues junior amp now has more headroom
Perfectly matched and paired with sovtek preamp tubes ecc83 gave a more boutique character to the famous fender blues junior amp
An excellent choice
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B
Bladegul 11.09.2023
En remplacement des Sovtek (qui devenaient polyphoniques) dans un Koch Studiotone, elles font parfaitement le job : aucun bruit de fond, chaleur et compression naturelle. Je n'ai pas d'avis sur la durée de vie de ces lampes, on verra à l'usage mais en l'état, c'est un remplacement parfait. A noter que le Koch ne nécessite pas de réglage de bias.
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FJ
buenas valvulas
Francisco Javier835 15.06.2023
Buen producto, perfectamente matcheadas, cero o muy bajo ruido, utilizadas para potencia en un ampli sin resistencia variable para bias, funcionan a rendimiento elevado, por eso quizás el buen tono.