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Lets get Technical > All Things Tube All about preamp and power amp Tubes.

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Author Topic: Marshall Valvestate 8100  (Read 2422 times)

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BC Rich Guy

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Marshall Valvestate 8100
« on: Time Format »

This is a single tube preamp set up and I think the tube maybe getting old and weak. The head seems to have lost it's low end rumble and now all I get is a weak hi gain sound from it. And would a thick tang Sovtek would bring back that low end rumble while not sacrificing too much gain?
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rnolan

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Re: Marshall Valvestate 8100
« Reply #1 on: Time Format »

Does sound like the tube needs replacing. Whatever tube you pick get it both Balanced and Matched (http://adadepot.com/index.php?topic=547.0). I'd go with a Mullard long plate, but then they're my favourite tube (no secret there LoL).
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Studio Rig: MP2/MB1 > Eurorack UB2442FX-Pro > TC M-One XL > Behringer Truths (with Truth Sub) / QUAD ESL 63s
Live Rig: MP2/MB1 > Alesis Quadverb > Alesis Midiverb 4 > Yamaha AM802 > B200s/Carvin TS100/DCM200L > ADA Split Stacks/Mesa P112s

MarshallJMP

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Re: Marshall Valvestate 8100
« Reply #2 on: Time Format »

Most of the gain is made by a pair of led diodes,the tube just warms up the sound.
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rnolan

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Re: Marshall Valvestate 8100
« Reply #3 on: Time Format »

So MJMP does it sound like it's more than just the tube then ?
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Studio Rig: MP2/MB1 > Eurorack UB2442FX-Pro > TC M-One XL > Behringer Truths (with Truth Sub) / QUAD ESL 63s
Live Rig: MP2/MB1 > Alesis Quadverb > Alesis Midiverb 4 > Yamaha AM802 > B200s/Carvin TS100/DCM200L > ADA Split Stacks/Mesa P112s

MarshallJMP

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Re: Marshall Valvestate 8100
« Reply #4 on: Time Format »

No i do think it's the tubes since BC doesn't talk about gain loss,just tone loss.
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BC Rich Guy

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Re: Marshall Valvestate 8100
« Reply #5 on: Time Format »

Thanks guys, it definitely was the tube.
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MarshallJMP

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Re: Marshall Valvestate 8100
« Reply #6 on: Time Format »

Ok so all good now?
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rnolan

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Re: Marshall Valvestate 8100
« Reply #7 on: Time Format »

Cool, easy to fix then  :thumb-up:
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Studio Rig: MP2/MB1 > Eurorack UB2442FX-Pro > TC M-One XL > Behringer Truths (with Truth Sub) / QUAD ESL 63s
Live Rig: MP2/MB1 > Alesis Quadverb > Alesis Midiverb 4 > Yamaha AM802 > B200s/Carvin TS100/DCM200L > ADA Split Stacks/Mesa P112s
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