Ben S.
Member
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Does anyone have experience or opinions on the tonal differences of 7189's compared to 6bq5's? Especially comparing the same manufacturer.
I am mainly interested because of the higher plate voltages. I am not terribly worried because my amp has power scaling and that brings the voltage down, but when opened up all the way, the plate voltage is around 350v.
None of my tubes red plate and the manufacturer said the amp usually runs in the low 330's when full out.
Tone wise, I love my Sylvania black plates the most so far. So I may just give the Sylvania 7189A's a try. Do they make black plate 7189's?
My 50's Mullards are great, but the Sylvania have more clarity and seem give the amp better dynamics with picking pressure and have a little more harmonic content. I even like my late 50's Mazda over the Mullards. But they are all good.
Edit: I found that Sylvania did make a black plate 7189.
I am mainly interested because of the higher plate voltages. I am not terribly worried because my amp has power scaling and that brings the voltage down, but when opened up all the way, the plate voltage is around 350v.
None of my tubes red plate and the manufacturer said the amp usually runs in the low 330's when full out.
Tone wise, I love my Sylvania black plates the most so far. So I may just give the Sylvania 7189A's a try. Do they make black plate 7189's?
My 50's Mullards are great, but the Sylvania have more clarity and seem give the amp better dynamics with picking pressure and have a little more harmonic content. I even like my late 50's Mazda over the Mullards. But they are all good.
Edit: I found that Sylvania did make a black plate 7189.
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