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Old 24th May 2012, 01:14 PM   #461
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Originally Posted by lduarte1973 View Post
you might be right about that , but id still try it with a tube pre you might prefer its tone
Why would you want to lower it's quality?.

I can see the reasoning for guitar, where distortion is often preferred, but bass is more often clean and high quality.

This is why the vast majority of bass amps are solid state, and not valve.
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Old 24th May 2012, 02:12 PM   #462
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well i guess mine is an exception then , it has tubes and a clean sound
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Old 24th May 2012, 04:46 PM   #463
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probably more complicated than that, or less

for one, you need gain
and drive power
various effects obviously takes a minimum of power to handle

regarding output stage
maybe the output trafo does something good with its high output impedance
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Old 24th May 2012, 05:03 PM   #464
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You can get clean out of a valve.

Keep it running in a linear region, add some feedback around it to compensate, and there's no reason it shouldn't sound solid state.
There's a lot of cheaper guitar amps around that use a valve for marketting purposes. Its a simple cathode follower arrangement (often a 12AX7 or equivalent), and the overdrive sound is provided by some LEDs in the feedback loop of an op-amp. Lovely... NOT.


I'm working on a project to get the saturated-valve-output-stage sound from as small a box as possible, and will start a thread when I've got something to show for it.

Chris
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Old 24th May 2012, 05:46 PM   #465
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this is my amp tubework 3300RT , not me on the video

Tube Works RT-3300 - YouTube
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Old 24th May 2012, 08:38 PM   #466
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Originally Posted by chris661 View Post
You can get clean out of a valve.
You 'can' get clean, but what would be the point? - it wouldn't sound any different to a transistor amp (but would be massively larger, heavier, more expensive, and under powered).

This is why most bass amps are transistor.
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Old 24th May 2012, 10:52 PM   #467
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this is my amp tubework 3300RT , not me on the video
hey, its cheating, thats not a tube amp but much better, its a mosfet SS solid state
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Old 4th June 2012, 05:13 PM   #468
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Originally Posted by tinitus View Post
hey, its cheating, thats not a tube amp but much better, its a mosfet SS solid state
it has a switch so you can choose tube or fet for preamp stage , i believe the tube is a 12ax7
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Old 5th June 2012, 11:53 AM   #469
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Originally Posted by Nigel Goodwin View Post
You 'can' get clean, but what would be the point? - it wouldn't sound any different to a transistor amp (but would be massively larger, heavier, more expensive, and under powered).

This is why most bass amps are transistor.
mine is a hybrid 300w
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Old 5th June 2012, 05:16 PM   #470
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is the driver stage tube or SS ?
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