Harmony Central Forums
Announcement
Collapse
No announcement yet.

2 amps, one cab?

Collapse



X
  • Time
  • Show
Clear All
new posts

  • 2 amps, one cab?

    I picked up a 5e3 clone off of ebay a couple weeks back. The thing is wired for an 8 ohm load, but the cabinet I have is a 2x12 with 8 ohm speakers, so I would have been running a 4 ohm load, which I knew had the potential to damage the amp. I tinkered around and removed the connection to one of the speakers, thus matching amp and cab at 8 ohms. It sounds great, but hot damn this thing is louder than I was expecting! So not quite a bedroom amp, but I think it will be my new gigging/stage amp. Upon further analysis, I'm wondering if I could get a clean/dirty 2 amp setup going...

    I was thinking it would be cool to completely separate the inputs on the cabinet so that one input went to one speaker, and the other input to the other, so I could essentially have two amps feeding into one cabinet. Like a 5 or 18 watt Marshall for dirt and the 5e3 for Fender cleans. Any of you guys ever do something along these lines? Anything I should beware of or look out for?

    www.myspace.com/stillillsd
    www.myspace.com/noisegateband







    Originally Posted by Naterel


    Itchyfingers gets my vote, his pedals scream class









    Originally Posted by bird turbo


    I have a kid like that in the band I play in at my church. I just wanna kick in his little face.









    Originally Posted by Poltergeist


    it sounds like a pitbull is eating the Universe.

  • #2
    A few companies have sold "split" stereo / dual input cabinets over the years.
    **********

    "Look at it this way: think of how stupid the average person is, and then realize half of 'em are stupider than that."

    - George Carlin

    "It shouldn't be expected that people are necessarily doing what they appear to be doing on records."

    - Sir George Martin, All You Need Is Ears

    "The music business will be revitalized by musicians, not the labels or Live Nation. When the musicians decide to put music first, instead of money, the public will flock to the fruits and the scene will be healthy again."

    - Bob Lefsetz, The Lefsetz Letter

    Comment


    • #3
      Of course you have a Carvin cab, you San Diegan. I do too. But it's looks like I'm going to buy a Traynor cab from a forumite tomorrow (to go with my Traynor head).
      This sig space for rent

      Good deals with: big Idiot, crowquill, DylanWilde, twanguero, big_cat, starmansam, christianatl, nd1377, gigant0r, cmog, SweetOblivion, GAS_KING, aussy, BHz_econo, light_years, WeStartToDrift, TheQuietWilds, seblo_15, loosegroove

      Comment


      • #4
        It shouldn't be a problem to split the signal as long as:
        a) power rating is matched. Any speakers with power rating less than the amp will blow the speakers.
        b) have them wired each to a separate output.

        you could always think about this idea:

        Wire it with 3 holes and a switch. The switch goes from mono to stereo, the 2 holes on the stereo side is for each speaker while the hole on the mono side is for both so you can get the best of it all.
        Kinda like a big 4x12 marshall cab!

        Does it Make sense, Greg?
        Spam:Selling:Nothing.WTB:Catalinbread Merkin FuzzGibson Maestro FZ-1 or amazing clone

        Comment


        • #5
          There's also specialized switcher just for that:
          http://www.tonebone.com/tb-headbone-vt.htm
          Ita erat quando hic adveni.

          Comment


          • #6
            If you are wiring the cab to take two inputs then make sure the jack mounting plate is plastic or that isolated jacks are used.
            DCC Engineering. Custom Cabs and Effects.






            Originally Posted by -Assy-


            Okay I summed up this entire thread in three posts. Let's go home and beat our children.

            Comment


            • #7
              All good points, thanks guys.

              Emre, I thought the mismatched power rating would damage the amp, didn't realize it could also mess with the speakers. Thanks for the heads up, my friend.
              www.myspace.com/stillillsd
              www.myspace.com/noisegateband







              Originally Posted by Naterel


              Itchyfingers gets my vote, his pedals scream class









              Originally Posted by bird turbo


              I have a kid like that in the band I play in at my church. I just wanna kick in his little face.









              Originally Posted by Poltergeist


              it sounds like a pitbull is eating the Universe.

              Comment


              • #8
                I strongly recommend checking out Celestian's website. They give all kinds of good article with everything you could possibly need to know.

                Personally, I prefer using two separate 112 cabinets, but that's because I'm a small dude and hate moving large thing onto the stage and back home up the stairs. I like making separate, lighter trips.
                http://myspace.com/hotmessization
                http://brochu.bandcamp.com

                - SPAM -
                Fender HRD White Lightning - Limited run of 800 - PM me
                Two Celestion Seventy 80 speakers - 16ohm - $100 for the pair

                Comment


                • #9
                  Of course you have a Carvin cab, you San Diegan. I do too. But it's looks like I'm going to buy a Traynor cab from a forumite tomorrow (to go with my Traynor head).


                  If only I could bring myself to like Carvin guitars... Are you going to get rid of the Carvin cab when you get the Traynor? I could probably take it off your hands.
                  www.myspace.com/stillillsd
                  www.myspace.com/noisegateband







                  Originally Posted by Naterel


                  Itchyfingers gets my vote, his pedals scream class









                  Originally Posted by bird turbo


                  I have a kid like that in the band I play in at my church. I just wanna kick in his little face.









                  Originally Posted by Poltergeist


                  it sounds like a pitbull is eating the Universe.

                  Comment


                  • #10
                    A few companies have sold "split" stereo / dual input cabinets over the years.


                    Didn't most of those have internally isolated speakers? I think you could run into phase cancellation problems if you only powered one of two speakers in a closed back cabinet.

                    Comment


                    • #11
                      Didn't most of those have internally isolated speakers? I think you could run into phase cancellation problems if you only powered one of two speakers in a closed back cabinet.


                      You will get phase cancellations only through the combination of certain speakers. It is famous to have certain speaker combo but the whole idea of splitting your cab to have a 2x12 / 2 1x12 is totally possible if you wire it well.

                      Greg, if you just run the 5e3, then most of the speakers should be able to handle your 5e3.
                      Spam:Selling:Nothing.WTB:Catalinbread Merkin FuzzGibson Maestro FZ-1 or amazing clone

                      Comment


                      • #12
                        Didn't most of those have internally isolated speakers? I think you could run into phase cancellation problems if you only powered one of two speakers in a closed back cabinet.


                        Yes, ideally you'd want two separate "compartments" - one for each speaker. Otherwise, just as you said, there will likely be additional phase issues within the enclosure.
                        **********

                        "Look at it this way: think of how stupid the average person is, and then realize half of 'em are stupider than that."

                        - George Carlin

                        "It shouldn't be expected that people are necessarily doing what they appear to be doing on records."

                        - Sir George Martin, All You Need Is Ears

                        "The music business will be revitalized by musicians, not the labels or Live Nation. When the musicians decide to put music first, instead of money, the public will flock to the fruits and the scene will be healthy again."

                        - Bob Lefsetz, The Lefsetz Letter

                        Comment


                        • #13
                          It shouldn't be a problem to split the signal as long as:
                          a) power rating is matched. Any speakers with power rating less than the amp will blow the speakers.


                          Not necessarily true. Mechanical failure will only occur when enough wattage is applied to push the speaker farther than it was designed to go. Distorted waveforms are especially nasty because they clip across wide spectrums, pushing the speaker more violently.

                          For cleans, as long as the speaker sounds clean, you're fine.
                          Guitars: Gibson Les Paul Traditional Pro, Epiphone Les Paul Standard (for sale), Fender Stratocaster, Ibanez AF75 (for sale), Alvarez Artist, Washburn Taurus, Fender Precision, Rogue MandolinAmps: Traynor YCV40WR, SWR LA12, Behringer BX3000T head/Steel Sound 2x12 bass cabPedals: Too many to list...Good deals: knives490, slufay, Jim Hunter, deadanddreaming, lank81, MickTaylorFan, jmecale72, billy budapest, melx, CRANK, Mdsmithii, juankyman

                          Comment


                          • #14
                            Not necessarily true. Mechanical failure will only occur when enough wattage is applied to push the speaker farther than it was designed to go. Distorted waveforms are especially nasty because they clip across wide spectrums, pushing the speaker more violently.

                            For cleans, as long as the speaker sounds clean, you're fine.


                            You are correct, dkerwood. I should have been more clear in my explanation but yes, you are totally right.
                            Spam:Selling:Nothing.WTB:Catalinbread Merkin FuzzGibson Maestro FZ-1 or amazing clone

                            Comment


                            • #15
                              Maybe I read the OP wrongly, but:


                              I was thinking it would be cool to completely separate the inputs on the cabinet so that one input went to one speaker, and the other input to the other, so I could essentially have two amps feeding into one cabinet.


                              When I read this, I think of literally taking the two preamp stages, the running them into two separate PI stages and finally two separate power stages (each with an individual speaker). If you did this, you would have the ultimate freedom in channel-switching amps, as you could chose the EQ/PI/output sections per your desires...not too bad since you've got one EQ/PI/PowerAmp already in the 5E3 chassis.

                              An very well-thoughtout power-distribution/grounding scheme would be important, to keep high-gain or saggy noise off the clean side.

                              You'd have to up the rectifier/filtercaps (maybe even solit them....yes, split them)

                              Of course, you'd need a second pair of PI tube(s), plus the second output powertubes and OT.



                              JanusAmps
                              Blind Doc Jones' Pickles....Cures What Ails Ya

                              Comment













                              Working...
                              X