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Double Bass Nerd question about the tonebone bassbone.

I got myself an fdeck preamp to use with my new upright, but I never thought to use my bassbone as a preamp before I bought it. Now that I've had a chance to A/B the two, I prefer the sound of my bassbone quite a bit more. It's more... accurate.
I've read that the input impedance of the bassbone is set to 470k, but the correct impedance for the SixRounds Original pickup I have on my bass is 1M.
My question to you is, what exactly am I missing in the sound by not matching impedance correctly? It sounds good to my ears, but my OCD brain can't help but wonder what I'm missing.
Also, is the impedance set by a simple 470k resistor? Would swapping it with a 1M resistor change the impedance? If so, could someone tell me which resistor it is? I've done a little smd work, and am totally capable of swapping out a resistor if that's all it takes.
Thanks guys!
 
I'll try to answer. First of all, you are not matching, nor do you want to match impedance. Please see here. What you are "missing" by not providing what's recommended as the optimal loading, is likely some of the low end. That assumes that your Bassbone is not a "voiced" pre-amp. Many pre-amps do not have flat responses, by design. It's a practice I abhor. The fdeck is essentially ruler flat across the frequencies of interest to us. The Bassbone may not be and you may prefer that sound. What matters is what you prefer. I prefer to use a pre-amp that's flat and then adjust the tone controls to my liking. I prefer to not have some altered response "baked into" the pre-amp. Also, recognize that you are evaluating the fdeck and Bassbone via the "filter" that is the rest of your rig. As I've said elsewhere, there's really no sense in striving for a flat overall response for your rig. Pickups aren't flat, cabs aren't flat, and room interactions sure mean that the overall response isn't flat. Tone-shaping is a virtual necessity. There is virtue, IMO, in striving for electronics with a flat response and a cab with as flat a response as practical. Then, you are starting with what's as close as you can get to a blank slate and you can add in the correction as needed.

Sometimes, the input impedance is simply set by one resistor at the front end of the pre-amp. Assuming it would not disrupt other aspects of the circuit, in such cases, changing the input impedance is as simple as swapping that resistor. Anybody have a schematic?
 
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...Now that I've had a chance to A/B the two, I prefer the sound of my bassbone quite a bit more. It's more... accurate.
I've read that the input impedance of the bassbone is set to 470k....It sounds good to my ears, but my OCD brain can't help but wonder what I'm missing...

The way I've always answered a question like this is:
  1. You ain't gonna break anything if the impedance values are "off." So...
  2. Don't pay attention to what your eyes (and reading about it) is telling you, because...
  3. If it sounds good, it is good.

And you said it when you wrote:
"I prefer the sound of my bassbone quite a bit more" and "It sounds good to my ears"

Just roll with it. There isn't an "Impedance Police" looking to issue any tickets if your equipment is hooked up "wrong."
;)
 
I plug all my electric and upright (with or without high pass filter) basses on the tonebone and it sounds great. what is more surprising is that I started plugging my laptop headphone out into one channel and it also sounded great, that way I can play synth bass and treat it just like any other instrument. It works, no hiss or volume problems. All I use is a 1/8 TRS (stereo) into a 1/4 TS (mono). Trust your ears always, don't rely on technical data. My .02 cents.
 
Fact. Thanks Mark.
I do like the sound. I just can't help but wonder how it would sound if it were up to the state mandated upright bass impedance set forth by the clergy of low frequency physicists. Haha.

Maybe that's why the new version of the Bassbone has a 10meg input on one channel, and a variable input impedance on the other. It looks like has adjustable an HPF on both channels as well.
 
I got myself an fdeck preamp to use with my new upright, but I never thought to use my bassbone as a preamp before I bought it. Now that I've had a chance to A/B the two, I prefer the sound of my bassbone quite a bit more. It's more... accurate.
I've read that the input impedance of the bassbone is set to 470k, but the correct impedance for the SixRounds Original pickup I have on my bass is 1M.
My question to you is, what exactly am I missing in the sound by not matching impedance correctly? It sounds good to my ears, but my OCD brain can't help but wonder what I'm missing.
Also, is the impedance set by a simple 470k resistor? Would swapping it with a 1M resistor change the impedance? If so, could someone tell me which resistor it is? I've done a little smd work, and am totally capable of swapping out a resistor if that's all it takes.
Thanks guys!

LOL, It sounds like your experience playing amplified DB in context is pretty slim...correct me if I'm wrong, pretty boy. :-)

After you get some real playing time in and are able to feel and hear the difference between the DB and electric bass, I'd wager that you'll shift your opinion of what sounds "great".

Have you ever noticed that music gear salesman will always light your cigarettes and puff a little smoke your way during the sale process. And refill your pack when it's getting empty and you are questioning the gear you've purchased.
 
Edit-- Gremson, I posted this in response to your post expressing displeasure with MR PC's post. It seems that you've deleted your post.

Sometimes it's not what you say, but how you say it. While I wouldn't choose the same approach that MR PC did, there is, perhaps, some merit in what he said. Before going any further, I want to state emphatically that there is no arguing with an individual's preference. You choose whatever sound you like, whether or not it conforms to what others think is near-ideal or not. To each his own and all of that.

Still, it is a fact that we all learn to make finer discriminations as we are exposed to new dimensions. As we do, our preferences often shift in terms of what we target. You've posted that you're new to the DB. Now, for all I know, you could be very seasoned in terms of your experience listening to the DB-- so much so that you've developed preferences based on years of listening to different exemplars in different musical contexts. That would be unusual. For most who are new to the DB, or any other instrument, or, for that matter, a drill press, or a car, or a clock, or loudspeakers, or art-- an understanding of what others regard as the prototypical desired characteristics along with an understanding of the dimensions of the differences develops with time and exposure to different exemplars. There have been many teenage newbies who have posted here who declare their $1500-DBs to be fantastic instruments that are better than those costing 3x that amount. We cannot argue with their opinions, but we can take note of their experience (or lack thereof) and wonder over what range of exposure their opinions are based. We can note that we would not likely hold the same opinion of their $1500 basses. We can wonder whether, over time and with exposure to other DBs, they will change their opinions. I'd say that in most cases, that will, indeed, happen.

I'm fairly confident that, ignoring "voicing" as I mentioned earlier, I'd prefer the sound of your pickup through the fdeck, given what I know to occur when a typical piezo is loaded by 470k ohms. I'd go so far as to say that most here would have that preference as well. Again-- all that matters is what you prefer. Still, I think it's likely that we would have different preferences because many here have had years of exposure to those exemplars. They have a very good working "template" of the sound of a DB and understand that that sound is more closely achieved (certainly not in an ideal fashion) when a piezo is "properly" loaded. They've learned to make that discrimination.

So, will you end up shifting toward the more usual preferences? No way to tell. If I had to bet, I'd say you will. For right now, it would be silly for anyone to suggest that you choose an arrangement of equipment that conforms, not to your own preferences, but to those of others. Of course, go with the sound that you prefer. It may change, it may not.

I'll end with one or two examples. It's very well-known among audiophiles that one (perhaps, sneaky) way to sell equipment to those with little to no listening experience is to exaggerate the low and high end, either via design or via adjustments of the tone controls. People find that sound impressive. It's like ear-candy. Flatten the response and they'll say that they prefer the exaggerated response. Then they take the equipment home and, often, they realize after weeks or months that real music doesn't sound like that. Over time, they become dissatisfied. The same is true for TVs. Did you ever notice that new TVs have a "retail" and a "home" setting? A "retail" setting? Yes, indeed. It produces a very bright picture with extreme contrast and over-saturated color. It draws your attention in the store. Then you get it home and realize that you can't really see the details of shading in objects. Then you go for the adjustments. Now had the TVs with the more natural setting been right next to ones with the "retail" setting in the store, almost no one would buy them. Personal preferences? Yes, but ones based on limited samples.

I am not suggesting that your preferences are, necessarily, based on limited experience. I made that clear earlier. I am suggesting that, with experience, your preferences might just change as MR PC suggested. They may not. Whatever is your preference at whatever time, go with it and enjoy.

I hope you don't find any condescension in this. None was intended. Now, re-read MR PC's post and you may view it in a different light.
 
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Edit-- Gremson, I posted this in response to your post expressing displeasure with MR PC's post. It seems that you've deleted your post.
Sometimes it's not what you say, but how you say it. While I wouldn't choose the same approach that MR PC did, there is, perhaps, some merit in what he said. Before going any further, I want to state emphatically that there is no arguing with an individual's preference. You choose whatever sound you like, whether or not it conforms to what others think is near-ideal or not. To each his own and all of that.

Thanks drub, yes you've stated the obvious in a much more eloquent fashion than I ever do! :-) I believe we've crossed bows here a few times in the past, but I really do value your insight and sharing on all things DB.
 
Thanks drub, yes you've stated the obvious in a much more eloquent fashion than I ever do! :) I believe we've crossed bows here a few times in the past, but I really do value your insight and sharing on all things DB.
Much appreciated. I hope my post went beyond the obvious. :)
 
You talk real purdy, Mr drurb.
I deleted my post because it was a bourbon fueled response, and I saw more snark in Mr PC's response than there really was.
I definitely haven't had a ton of experience in amplifying the sound of an upright. But I have been a multi-instrumentalist performing and recording several instruments for over a decade. And through those years, my ears have changed my mind more than once on how I think an instrument should sound.
I definitely appreciate the wealth of knowledge stored in the Internet walls of TalkBass. Even if a bunch of it is doled out with an extra few ounces of condescension!