can give a feeling of a fat texture. Obviously, the flipside is that it lose the tightness and definition of the sound.

Obviously, by having more speaker cones, it will have greater air moved: For example, given the depth is approximately equal, a 2x10 have the surface area of 157sqin, while a 1x12 only have 113sqin. Also, it will have increase power-handling capability, or more precisely, they split the amp output. Thus, given same amplification head, a 2 speaker configuration will have louder volume, but not as much power.

Types of Unit

DI Unit (including amp modelers)
Many so called Amp modelers and micro-amps, especially in regard to Rockman, are actually DI Units. basically, these units transform the unbalanced, high impedence signal from the guitar into a signal that can be used by the headphone, or even connect directly to line-in or balanced mic-input, allowing direct input of guitar to the mixing desk in a recording studio without losing the tone and quality of an amp. Furthermore, the guitar oreinted amp modelers can also be used as modelers or effect units that can be plugged into a guitar amplifier to provide volume.

Another benefit of using a DI unit is that they are compact, while they can go loud and getting that particular tone. This is particularly true for amp modelers and "headphone amplifiers", as their embedded electronics frequently a very

good approximation of a tube amp, and if you are going to hook up to a P.A. system most of the time, these may provide a much better alternative, as they are usually cheaper: The Behringer V-Amp 2, for example, is less than $100 dollars.

There are two kinds: one is an analog modeler, which is commonly used in modeling amp (Amplifier that actually tries its best to emulate a certain tone instead of just amping it), and digital computer modeling, such as Line6's POD 2.0. The benefit of using amp modeler is that it allows you to use such effects even in recording, as well as a more easy to maintain equipment — true tube, after all, is a nightmare to maintain.
What amp modelers and effect units does not do, however, is provide the volume; for those, you will need to hook it up to a powerful amplifier, or a loud P.A. system.

Combo Amps

Busking amps
In essence, they are practice amps that have a battery attached. Naturally, that means they are gonna be more expensive. 15 watts on average, but Pignose Hog 30 can go to 30 watts, while Crate's Taxi Series have some that have 50 watts with 10 inch speakers. They will usually provide 6 to 10 hours in one charge. Also, make sure they can take AC power in too when needed. Do note that they are actually quite weak in terms of overdrive. On the other hand, rock and metal music is not exactly busking music, either — soft and light music that add to the atmosphere (usually a park or something) is usually preferred, and thus, the watt amounts is usually enough. A good one is Vox's DA5 (veyr tiny and small) and DA15, as they have modelling processors for an approximation of a tube amp.

Small gig amplifiers
From 30 watts upward, these combo amplifiers the smallest package which is considered suitable as a stand-alone amplifier for small gigs. The standard is usually 50 or more watts of power and one 12 inch speakers, though some manufactures may use less wattages of 30 and 40, while employing more than one speakers. In better models, sound quality begins to approach levels acceptable to professional musicians. Quality is always important, but perhaps even more so in the case of the 1x12 combo - with a good one, you'll prove the doubters wrong, but with one of the many duds, you won't be taken seriously. The 1x12 is not a big amp, and if you want to bring it to a serious audition or gig without enduring a storm of eye-rolling and chuckling, it had better stand out from the crowd. These cost about 180 to 450 dollars.