• TalkBass has been independent since 1998. Add your voice.
    Create a free account to reply to discussions, view embedded media, and browse with fewer display ads.
    Join freeLog in
    Want zero display ads or expanded classifieds tools? Compare plans.

Anybody running two sansamp RBI's?

Could you give more details about your technic to determine the "unity gain" of a line mixer? Is it by watching the input leds of your compressor? When you attempt to determine that unity gain, what is the level of your line mixer, is it max?

To determine whether you have unity gain you need two very advanced pieces of audio equipment (although one will do in a pinch), fortunately most humans come with them as standard equipment, they are usually located on the sides of ones head.
 
  • Like
Reactions: Fuzzbass
Nope - you can run them in parallel. I figured out a way years ago and have posted it numerous times.
Before using a splitter and mixer I used the method you describe as it is a fairly straightforward application of the technology. (Are you the guy who invented the Internet too?). I found the difference in sound of the second unit in the chain to be substantially watered down (yes, even after checking input 2's pad switch) and the interaction between the two with the fixed 50/50 mix (and subsequent blending and output adjustments) to be too cumbersome and sensitive. Those were the specific problems I sought to solve for which led me to a buffered splitter and line mixer solution. There is no way to increase the level of the alpha unit without increasing the beta unit as well. When the volume of one controls both that's not really parallel in my book, but I get where you're coming from.

For the record I switched to the VT Bass Rackmount since then anyway, but I digress.
 
Before using a splitter and mixer I used the method you describe as it is a fairly straightforward application of the technology. (Are you the guy who invented the Internet too?). I found the difference in sound of the second unit in the chain to be substantially watered down (yes, even after checking input 2's pad switch) and the interaction between the two with the fixed 50/50 mix (and subsequent blending and output adjustments) to be too cumbersome and sensitive. Those were the specific problems I sought to solve for which led me to a buffered splitter and line mixer solution. There is no way to increase the level of the alpha unit without increasing the beta unit as well. When the volume of one controls both that's not really parallel in my book, but I get where you're coming from.

For the record I switched to the VT Bass Rackmount since then anyway, but I digress.

That's fine - you're in the minority as it's worked well for a lot of folks over the past eight years since I originally posted. I always recommend folks give it a whirl since it only requires one more cable rather than going to the more obvious and expensive mixer solution, which can have it's own set of issues.

If you want a blended tone, it works very well and is pretty straightforward if executed properly. If you are wanting to do more than just blending tones, a mixer is the next step.

As for your snarky internet comment, it's neither warranted nor appreciated.
 
  • Like
Reactions: Fuzzbass
That's fine - you're in the minority as it's worked well for a lot of folks over the past eight years since I originally posted. I always recommend folks give it a whirl since it only requires one more cable rather than going to the more obvious and expensive mixer solution, which can have it's own set of issues.

If you want a blended tone, it works very well and is pretty straightforward if executed properly. If you are wanting to do more than just blending tones, a mixer is the next step.

As for your snarky internet comment, it's neither warranted nor appreciated.

@JagR, I agree with your last comment. Maybe DigitalMan should read the Talkbass forum rules again.

@DigitalMan, maybe you should read the Rule #1 bellow. I put in bold and italic parts that should be of interest to you. By the way, I appreciate your help on my preceding posts but In My Opinion, I agree with JAGR when he writes that some of your comments are not necessary and may not be appreciated.

Rule #1: Respect your fellow members. All registered users must address fellow members with the utmost respect at all times. If you do not agree with a fellow member, be courteous in your response. Thomas Jefferson said it best: "When I hear another express an opinion which is not mine, I say to myself, he has a right to his opinion, as I to mine".

Because of the limitations of text based communication, the expression of intent can be tricky. One of the most common triggers of rule violations is the misinterpretation of intent behind a post. Use smilies often, and remember, it never hurts to begin a response with "In my opinion"...

If you do not address everyone on the board with respect, be prepared to lose your membership.
 
  • Like
Reactions: Fuzzbass
Here again is the link to parallel SansAmp rack preamp operation, as discovered by JGR:
Something cool for Sansamp RBI/RPM users... | TalkBass.com

I've been using this method since it was posted, and love it.

There are limitations. If you want to alternate between one and the other via footswitch, the Tech21 manuals will show you how to do that. If you want the capability to alternate and blend, then additional gear is needed.

All that said, I've used the parallel method with RBI+RPM, RBI+VT-RM, and RPM+VT-RM. Despite the limitations it's still really versatile. Sometimes I've left both preamps active: the simplicity of "set it and forget it". Other times I have left the primary active full time, and switched the secondary in when I needed more overdrive.
 
  • Like
Reactions: JGR and dupseb
Here again is the link to parallel SansAmp rack preamp operation, as discovered by JGR:
Something cool for Sansamp RBI/RPM users... | TalkBass.com

I've been using this method since it was posted, and love it.

There are limitations. If you want to alternate between one and the other via footswitch, the Tech21 manuals will show you how to do that. If you want the capability to alternate and blend, then additional gear is needed.

All that said, I've used the parallel method with RBI+RPM, RBI+VT-RM, and RPM+VT-RM. Despite the limitations it's still really versatile. Sometimes I've left both preamps active: the simplicity of "set it and forget it". Other times I have left the primary active full time, and switched the secondary in when I needed more overdrive.

And what do you prefer, the RBI+PRM or VT-RM+RPM?
 
And what do you prefer, the RBI+PRM or VT-RM+RPM?

Each setup is cool in its own way. To add to the versatility, you can flip the "primary" and "secondary" preamps in the parallel config. Either way you can get levels equal, but the primary (the one you plug into first) will dominate a wider range of the blend spectrum.

JGR uses the RPM as primary and dials in RBI to taste. I like bright sizzle for hard rock, so I prefer RBI as primary and RPM as secondary. Yes, same as the SABDDI, the RBI has a mid scoop that can be mitigated but not eliminated by rolling Blend back toward noon. It also has the Presence control that I love. Soooo, I dial in a bright tone with the RBI, and use the sweep mid on the RPM to restore mid punch at whatever frequency I feel like on a particular day (the band and style of music factor in, too ;)).

But really, all the configs work well together. You could use RPM as primary and dial in VT-RM to taste, or vice versa. Same's true with any combination.

Probably my least favorite combo was RBI plus VT-RM, because both of those units tend to be colored, while the RPM is flattest of the three. I still liked it, though! What can I say: flat tones are nice, but I also enjoy playing with tone coloration.




P.S. Someone here on Talkbass (I forget who, sorry) ran RBI, RPM, and VT-RM in parallel! I was never tempted to get so fancy, but he got cool tone out of it.
 
  • Like
Reactions: dupseb
Sorry for any confusion, I'm not talking about a particular solution. I was addressing the comments directed at me a few posts back.

Let's forget it.
I think that the main purpose of this forum is to help each other.
Some of us are bass experts as you are DigitalMan, JAGR, Fuzzbass and I think the others can learn from you a lot.
Some others, like me,are new old bass players who make a comeback after 30 years and realized that the world has changed a lot.
The only thing I want when I ask my questions is to learn from your experience and have fun.
Let's talk about bass....
 
Last edited:
  • Like
Reactions: Fuzzbass

Latest posts