I'm in the midst of constructing my idea of a completely modular electric bass system to include a very modular bass guitar (no internal preamp to speak of, pickups wired with individual outputs with individual volume controls only). I'll be getting to building that bass inside of a month. Currently I'm using my ever-loyal Cort A4. I'm currently using a Baer ML112 cab which is a front ported 1x12 neo + 1x6 with a crossover (not sure of the x-over's tuning point). Amp = Mackie M1400i. Preamp = a ton of custom stuff ranging from Line 6 M13 to a fully analog modular filter array to a DIY Marshall JTM45. I want to add another speaker cab to the works. Not to replace the Baer, but to augmment it and provide me with another voice in the choir. I'm also looking for a little more volume, moreso for the added headroom. So I have a couple of loose-end questions here. Does a 1x15 provide more SPL than a 2x10 - all things being relatively equal (same speaker types in both, whether they are both neos or both traditional type magnetics) .. and so on. In either case I'm considering front ported cab designs. Also, are modern 15s fast enough to work well with an Entwistle/Sheehan tapping type of typewriter style? Or is that the 10" universe? To clarify "fast" and/or "speed", some may argue that "speaker speed" is a ridiculous notion in that "100hz is 100hz" and that "speed" is a mistaken idea. When I speak of speaker speed, I'm talking about loudness, not frequency. In the synthesizer world it's known as the amplification envelope. It has nothing to do with frequency or pitch, it is relative to how quickly the audible volume level comes up to full volume ... more specifically the attack portion of the envelope. So when I ask if a modern 15" speaker is as fast as a 10", I mean does it's volume envelope's attack phase come up to expected levels as quickly as a 10" speaker. It has nothing to do with the actual frequency, only the SPL. That said, will the attack transients be as pronounced between the two designs? For that "a little bit mushier" attack the 12" seems to provide me with that just fine. Uh .. so far. So I'm hoping to add more low end, but to tighten it up a bit with this additional cab. So .. 1.) attack speed - 2.) SPL amounts - 3.) general versatility within my given setup as provided above. I used to have an Ampeg SVT with a front ported Ampeg 6x10 HLF cab. Among other things, I'm trying to gain access to that tight/very nice bottom/low end. Keeping my current amp/speaker cab in mind. This is difficult to explain. Thanks.