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Active bass + sans amp = distortion?


Theodeus

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Hi!

I´m having a minor problem with distortion with my new Yamaha BB605 (sweet) and my sans amp bass driver DI... When all the controls on the SA, except blend, is set to flat and my bass too, it produces a very unwanted dist on the lower notes (G# and downwards)... Is it because I put the active bass into the sans amp wich sends the signal to the amps preamp? That means the signal goes through 3 preamps before it gets amplified =)Wee... Any clues? :wave:

Lol, my other user (wich I no longer can use) had 27 figures in the name... It was possible to register, but not to login! (MasteroftheGfifthfretDstring btw)
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I didn't really READ the post (just skimmed), but typically lower-pitched massier strings can make more output signal (which is why some people set that side of the pickup closer to the body). So it is easy to overdrive the circuitry, and in a chain, it can add up depending on how each input and output gain is set, without higher-pitched strings be as [obviously] beyond the wall.
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BTW, preamps designed for bass are not necessarily voiced FLAT when the controls seem to indicate that everything is set flat. Since bassists function in a band or ensemble as the lowest tuned frequencies, the preamps are often contoured to emphasize the low end (and maybe some highs for clarity and definition).

 

The result is that low freq signal strength can be distorting or clipping next circuit in the signal chain, and several preamps in a row can make this additive, so that if it begins mildly and rather inaudibly (the ear is not as sensitive to low-freq distortion), after two or three recursions it is obviously audible (much the same thing as phil6006's settings in the How can I get shaking lows without clipping? thread.

 

Gain structure down the signal chain is very important to understand for quality audio, and troubleshooting, and low frequencies/overtones more usually than not represent the most energy - and signal strength - in typical music content.

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I have a SansAmp BDDI and haven't yet experienced the distortion that you've mentioned (unless I've been purposefully overdriving my sound). My bass has an active on-board EQ as well, and I don't think the "3 preamps" is the issue.

 

I do know that the SansAmp has a very sensitive input, and, for example, when I practice in my basement the SansAmp really boosts the hum induced from my pickups by the combination of lights and computer down there.

 

Do you run any other effects/pedals before the SansAmp in your signal chain? The manual recommends against doing this whenever possible because it can add unwanted noise to your sound.

 

Frankly, I'm a bit baffled.

spreadluv

 

Fanboy? Why, yes! Nordstrand Pickups and Guitars.

Messiaen knew how to parlay the funk.

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try cutting the low EQ on the bass a little.
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Did you try changing the battery in the bass? I was playing one of those through my rig and it was distorting alot. I changed the battery and - Viola - beautiful tone.

 

Those BB605's are sweet little basses. I am debating getting one. I had it hom efor a while but fought the urge.....so far.

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