Ampeg Rocket Bass Combos

Discussion in 'Amps and Cabs [BG]' started by kranahan, Mar 29, 2021.


  1. Bass

    Bass

    Nov 10, 2003
    Canada
    Good point, very interesting. Models 210, 115 and 112 are all the same, except 112 has +15 treble instead of +16. Models 110 and 108 depart significantly on bass, mid and treble.
     
    beans-on-toast and Dino Boreanaz like this.
  2. Lowbrow

    Lowbrow Supporting Member

    Apr 22, 2008
    Pittsburgh PA!
    I, too, roll off bass & boost treble a couple of notches on my RB-112. I believe what I see in the freq. charts posted earlier, but think we are actually dealing with an exaggeration in low end when set flat, which is simple to tame--and definitely easier to wrap one's head around than the massive low-end cutting I became accustomed to when using a Rumble 100.

    If any of the earlier conclusion that these combos "lack mids" came from feedback I myself posted earlier on, let me state that I do not believe this to be the case. My addition of an EQ pedal aims to expand my tone control to enhance mids higher than the combo's built-in 500hz knob -- specifically 900hz, 2.8k.
     
  3. Lowbrow

    Lowbrow Supporting Member

    Apr 22, 2008
    Pittsburgh PA!
    Thanks for the charts, by the way. Interesting to see that what I heard as a bass boost when engaging SGT is really more of a high-end roll off.
     
    Dino Boreanaz likes this.
  4. Michael Eisenman

    Michael Eisenman Supporting Member

    Jun 21, 2006
    Eugene, Oregon
    Wow. Pink noise really is pink.
     
  5. jeff7bass

    jeff7bass

    Apr 9, 2009
    Use a A/B box or a Sansamp and run them both in stereo. That would be cool.
     
  6. Here are frequency response plots of my RB-110 using a mic on the speaker. These three plots show the frequency response using pink noise input into the Aux In as compared to into the 0 dB amp input with and without the SGT engaged. As with my previous plots, I've noted settings on the left side of each screenshot.

    The Aux In bypasses the preamp's EQ section and does seem to have a flatter response than going through the preamp.

    I did not experiment much with the mic position, so the pronounced hump in these plots around 120 Hz may be the result of proximity effect from the close mic positioning. This hump may also make the mid-scoop appear more exaggerated than it sounds in the room.

    Enjoy!

    Aux In Mic.jpg
    Amp Input Mic SGT Off.jpg
    Amp Input Mic SGT On.jpg
     
  7. beans-on-toast

    beans-on-toast

    Aug 7, 2008
    lowplaces and Dino Boreanaz like this.
  8. So I bought the RB108 and want to replace the 8" speaker with a 10". I find the 'A' note doesn't have enough 'oomph'. What's the best method/tool to cut the hole a little bigger without getting all crooked? I don't have a shop space.
     
    68Tele-Bass likes this.
  9. Lowbrow

    Lowbrow Supporting Member

    Apr 22, 2008
    Pittsburgh PA!
    Oh man. Not trying to be snarky, but I highly suggest you return it and buy the 110 you really want.
     
  10. They don't have it here. They have the RB112 but I don't want it. Too pricey. Aren't the Rockets made to be modded just like the Rumbles? I got my jigsaw ready...
     
  11. Michael Eisenman

    Michael Eisenman Supporting Member

    Jun 21, 2006
    Eugene, Oregon
    Wait for one. Cabs are sized to optimize the properties of their drivers. It’s a system.
     
  12. zmebass76

    zmebass76 Makin' bass faces since '92... Supporting Member

    Feb 17, 2013
    Nederland, Tx
    I highly recommend you just buy the RB110 instead of the 108. These cabs are designed and built for their specific drivers. You'll need a bigger cab to house a 10" speaker.
     
    68Tele-Bass and Greenstreet like this.
  13. You guys are right. By modding with a bigger speaker, my frequencies will probably be out of wack, rendering the amp useless. I'll keep it for now and save up for the RB110. Thanks for bringing me to my senses!
     
  14. Michael Eisenman

    Michael Eisenman Supporting Member

    Jun 21, 2006
    Eugene, Oregon
    Just the one note? Maybe there’s a setup issue with your bass. I haven’t seen any similar complaints about the RB-108.
     
    Greenstreet likes this.
  15. Acoustically, just the A note doesn't seem to be as strong no matter what bass I use. It doesn't do that on my BA 110 V2 or Rumble 40 V3, which both have 10" speakers. They seem to carry all notes evenly. I thought because the RB-108 has an 8" speaker a 10" would be better.
     
    68Tele-Bass and Michael Eisenman like this.
  16. jeff7bass

    jeff7bass

    Apr 9, 2009
    Different sizes serve different purposes IMO. The 108 is a bedroom/living room practice amp. The 110 same, but could do acoustic coffeehouse type jams. 112, could do lower volume rock jams, rehearsals, parties, etc, even stage gigs with PA support (and maybe a stand). 115, better for rock gigs especially with an extension 115 for the full 200 watt 215 rig. 210, plenty of guts for gigging by itself even without PA support. With extension, serious pro-style rig suitable for bit rooms and festivals.
     
    68Tele-Bass, Greenstreet and Bass like this.
  17. Greenstreet

    Greenstreet

    Aug 31, 2017
    I haven't played the two side by side, but several people have posted in the RocketBass thread that the 108 is louder than the 110.

    .
     
    jeff7bass likes this.
  18. Bass

    Bass

    Nov 10, 2003
    Canada
    I find it hard to believe that a 30 watt 8-inch amp would be louder than a 50 watt 10-inch amp. I'd like to see some sort of test with a decibel meter.
     
  19. Greenstreet

    Greenstreet

    Aug 31, 2017
    The difference between 30 watts and 50 watts is really not that much at all. Consider that the cabinet for the 108 is larger proportional to the speaker, heavier (indicating that it's made out of MDF rather than plywood, therefore less resonant), and the fact that Dino M said that the 110 is voiced more towards the lower frequencies than the 108 (it's the lower frequencies that suck the most juice), I can easily believe that an efficient 8" speaker in a 30 watt amp can be louder than an inefficient 10" speaker in a 50 watt amp.

    As I said, I haven't played them side-by-side myself. If you've done a side-by-side, or do one in the future, I'd be interested in your thoughts.

    .
     
    Last edited: Sep 22, 2021
    jeff7bass likes this.
  20. jeff7bass

    jeff7bass

    Apr 9, 2009
    That plus what the ear perceives as "loud" might not really be louder. TC Electronics seems to have tapped into what the ears hear (or the brain perceives) as well as anybody, if not better. They took a beating on their ratings with earlier amps, but even the famous Bass Gear amp tech Tom Lees admitted the technology in them was amazing and the amp was far louder than the actual power ratings. I think they did it with multi-band compression and/or filtering.
     
    Last edited: Sep 22, 2021
    Greenstreet likes this.
  21. Primary

    Primary TB Assistant

    Here are some related products that TB members are talking about. Clicking on a product will take you to TB’s partner, Primary, where you can find links to TB discussions about these products.

     
    Oct 17, 2021

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