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  • January 11, 2009 at 3:12 pm #77523
    Hollow
    Member

    Does anyone have experience with or knowledge about the following:

    1) Can the LPB-2ube Stereo Tube Preamp be used to send one guitar signal to two amps?

    2) Has anyone used the two channels of the LPB-2ube as a tube buffer and a tube return in an effects loop, and, if so, how’d that work out? It seems like that would be a rad use for the pedal.

    Much obliged.

    January 11, 2009 at 6:08 pm #90437
    julian
    Moderator

    well to the first question, I don’t think it can, because it has two separate inputs and outputs.

    Edit: I’m wrong, it can be used as a signal spltter

    January 11, 2009 at 6:19 pm #90439
    Hollow
    Member

    Thanks for the input, Julian. I didn’t know if one of the modes (stereo/dual mono) might allow it to send one signal to two amps.

    Using it as a tube buffer/tube return in an effects loop still seems interesting, though.

    January 11, 2009 at 6:34 pm #90440
    electro-melx
    Moderator

    yes you can….

    https://www.ehx.com/assets/instructions/lpb-2ube.pdf

    – I/O Routing –

    Mono-to-Stereo Signal Splitter – The LPB 2ube can be configured as a signal splitter. Plug an instrument into the R (mono) Input and leave the Left Input unplugged. This will allow the signal going through the Right Input to go into both the right and left amplifier channels. Each amplifier section is processed independently, whether it is two guitar amps, a series of Electro-Harmonix effects pedals, tape recorder inputs, or two mixer channels.

    Stereo-to-Stereo – To use the LPB-2ube as a stereo pre-amp, plug the left and right outputs on your instrument into the Left and Right Inputs of the pedal respectively. Each stereo channel is independently controlled. Connect the outputs to the inputs of your tape recorder, mixer or power amp.

    Mono – The LPB-2ube can be configured as a mono tube distortion pedal by putting the two pre-amp channels in series. This provides 2 volumes and 2 drive controls, which can be set for a wide variety of overdrives. Experiment with the four knobs and you will see the many possibilities… from bluesy to total grunge and anywhere in between. An additional patch cable will be needed, preferably one that is 1 ft. in length or shorter. Plug your instrument into the R (mono) Input. Plug one end of the short cable into the Left Input and the other end into the Right Output. The output of the LPB-2ube will come from the Left Output, so plug the Left Output into the guitar amp. Warning: This setup can be very loud; make sure the amp is off when setting it up and the VOLUME L knob is turned down all the way before turning the amp on.

    January 11, 2009 at 6:52 pm #90442
    Hollow
    Member

    Very cool. Thanks, man.

    January 11, 2009 at 6:59 pm #90443
    electro-melx
    Moderator
    Quote:
    Very cool. Thanks, man.

    no problem, it’s very versatile pedal….a friend of mine uses it in front of a Roland Jazz Chorus (non-tube) amp and by all accounts it totally rocks!

    January 16, 2009 at 2:56 am #90873
    CHOUT
    Participant

    I just got one…I’m digging it.

    May 17, 2009 at 4:55 pm #96797
    Goldenglove
    Member

    I’m thinking of buying one, but I want to know – if I overdrive it (with an LPB-1, for example), I’ll be overdriving the tubes, not some transistors, right?

    June 22, 2009 at 2:20 am #98217
    Greg Frasch
    Member

    After testing the LPB 2ube Preamp in the back of a Fender Stage 185, I have to tell all of this masterpiece.

    Respectively, it turned this amp into a tube amp. As well, adding to the mix the English Muff’n with the 12AY7’s
    to give it an additional drive channel if you will.

    Specs:
    I set the preamp section in the amplifier (effects loop) to -16dBv and an additional offset gain of -9db. Then, I pushed it all back up with the LPB 2ube, sometimes chained, and sometimes just one side. Giving a massive gain responsibility to the LPB 2ube.
    Then of course using the English Muffn’ gets a sort of Vox head sound for the OD channel.

    Oh the Velvet!

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