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Noble Amps Preamp
- Thread starter IanMartinAllison
- Start date
These are made individually, with love... and does Fende even make a tube preamp pedal?
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i meant the pre in an amp. like the superbassman 100T perhaps, which has a preamp out, or even the 63 blonde bassman clone that i have that's handwired with super beefy transformers
yeah, you are right, that's why I want to keep on using tubes. And I'm more interested in material use than actually the circuit of a Noble.
I like to play through the Noble into the front of a Fender tube pre amp. Tube + tube. Does that make me bad?
Can anyone describe the theory behind Noble's "low cut" switch?
My manual from 2016 says "Low cut switch drops 6dB/octave below 150Hz." Jack told me this was an error, the number should be 90Hz.
As I understand it, 6dB/octave is a straight linear curve down to the lowest frequency (but could be wrong!). The 90Hz point is way to high for a typical High Pass Filter for bass guitar, and HPFs usually have at least a 12dB/octave curve if not 24dB.
So what is the operational point of the Noble's low cut switch? If you have an HPF, should the low cut switch be left off? Used in tandem with the HPF?
Insights welcome!
My manual from 2016 says "Low cut switch drops 6dB/octave below 150Hz." Jack told me this was an error, the number should be 90Hz.
As I understand it, 6dB/octave is a straight linear curve down to the lowest frequency (but could be wrong!). The 90Hz point is way to high for a typical High Pass Filter for bass guitar, and HPFs usually have at least a 12dB/octave curve if not 24dB.
So what is the operational point of the Noble's low cut switch? If you have an HPF, should the low cut switch be left off? Used in tandem with the HPF?
Insights welcome!
I don’t use it, but instead run the Noble into the front end of a PJB combo with 5 band EQ and roll off the Low Bass band as needed. Everything else flat.
There are frequency response graphs around which should answer your question.
I pinged Jack and will relay his response. An HPF affects the frequencies differently than the Low Bass shelving control. The latter essentially lowers a broad section of low frequencies with a shallow slope. The HPF lowers only a small section of lower frequencies below its knee with a steeper slope. Counter intuitive, but by doing that the HPF removes the LF "junk" noise and can actually boost the rest of the bass signal if desired for a clearer and louder signal. Just trying to understand Noble's Low Cut control with more precision.
That info has been known for a long time. Demonstrated and measured many times.
Not trying to be “mean,” just trying to point out that the info you seek has been known for quite some time.
Not trying to be “mean,” just trying to point out that the info you seek has been known for quite some time.
I want to understand how Jack's LC relates to my HPF. Use mine and not his? If I use both, how do they sonically interact? That's all. The manual doesn't say anything about use cases for his LC.
The answer to this is as individual as the player. It depends so much on the the player, the bass, the amp...
There is also a large number of players that don't use a high pass filter.
This is just one of those things that you will have to work out yourself.
I understand the difference between a HPF and a shelving filter, and my one complaint about the Noble - if you can call it a complaint - is that the HPF is fixed at a higher point than I would have liked. If I were able to change it, I would set it at 80hz, which is the frequency I most often ask FOH soundmen to roll off my DI feed in live situations. It’s a frequency I understand how to deal with because so many sound boards have a HPF set there.
However, lacking that feature, I have still had good results just leaving that switch off and mitigating the excess bass further down the chain.
However, lacking that feature, I have still had good results just leaving that switch off and mitigating the excess bass further down the chain.
carsonchilders
Carson Childers
I sent my Noble to Jack and he moved the HPF as low as he was willing to go, I think it ended up around 60hz. I utilized it with the bass boost a lot in my old setup.
I was wondering about a custom request. Did he leave the 6dB/octave shelving intact or induce a sharper slope to actually function like an HPF?
carsonchilders
Carson Childers
I don't think he changes that. "The slope of this filter is not steep" is what he said
Great discussion here. I’m wondering what combinations of gear and settings people are using with basses tuned to a low B, like most 5-string players.
I like to fatten things up a little bit. depending on the bass that I use, I generally use 1 of 2 settings:
- Bass at noon / Treble at noon
- Bass at noon / Treble at 9am
