Most basses have a volume potentiometer ("pot" or "knob"), which can be turned up or down, and a tone potentiometer, which rolls off the high frequencies when it is turned to the player's right. Some basses may also have a pickup selector control or switch, to select single-coil or humbucking pickups. Since the 1980s, basses are often available with battery-powered "active" electronics that boost the signal with a preamplifier and provide equalization controls to boost or cut bass and treble frequencies, or both. Some expensive basses have even more equalization options, such as bass, middle and treble.
A common feature of more expensive basses is "neck-through" construction. Instead of milling the body from a single piece of wood (or "bookmatched" halves) and then attaching the neck into a pocket (so-called "bolt-on" design), neck-through basses are constructed first by assembling the neck, which may comprise one, three, five or more layers of wood in vertical stripes, which are longer than the length of the fretboard. To this elongated neck, the body is attached as two wings, which may also be made up of several layers. The entire bass is then milled and shaped. Neck-through construction advertisements claim this approach provides better sustain and a mellower tone than bolt-on neck construction. While neck-through construction is most common in handmade "boutique" basses, some models of mass-produced basses such as Ibanez's BTB series also have neck-through construction. Bolt-on neck construction does not necessarily imply a cheaply made instrument; virtually all traditional Fender designs still use bolt-on necks, including its high-end instruments costing thousands of dollars, and many boutique luthiers such as Sadowsky build bolt-on basses as well as neck-through instruments.
Chords are not used that often by electric bass players. However, in some styles, bassists may sound "double stops", such as octaves with open strings and powerchords. In Latin music, double stops with fifths are used. Robert Trujillo of Metallica is known for playing "massive chords"  and "chord-based harmonics"  on the bass. Lemmy of Motörhead often played power chords in his bass lines.
A fully electronic kit is also easier to soundcheck than acoustic drums, assuming that the electronic drum module has levels that the drummer has pre-set in her/his practice room; in contrast, when an acoustic kit is sound checked, most drums and cymbals need to be miked and each mic needs to be tested by the drummer so its level and tone equalization can be adjusted by the sound engineer. As well, even after all the individual drum and cymbal mics are soundchecked, the engineer needs to listen to the drummer play a standard groove, to check that the balance between the kit instruments is right. Finally, the engineer needs to set up the monitor mix for the drummer, which the drummer uses to hear her/his instruments and the instruments and vocals of the rest of the band. With a fully electronic kit, many of these steps could be eliminated.
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1956 saw the appearance at the German trade fair "Musikmesse Frankfurt" of the distinctive Höfner 500/1 violin bass made using violin construction techniques by Walter Höfner, a second generation violin luthier. The instrument is often known as the "Beatle Bass", due to its endorsement and use by Beatles bassist Paul McCartney. In 1957 Rickenbacker introduced the model 4000 bass, the first bass to feature a neck-through-body design in which the neck is part of the body wood. The Fender and Gibson versions used bolt-on and glued-on necks.
If you choose to venture beyond the traditional acoustic drum set, the variety here will reward you for it. One great way to expand your percussion options is with an electronic drum kit, which gives you the opportunity to program any samples you want into the sound module. That means you get not only a huge range of natural drum sounds, but also the ability to queue up virtually any other effect you want. As well as electronic drums, there are plenty of world percussion options here for you to peruse. Those range from hand drums like the cajon and djembe to all kinds of distinctive instruments such as tambourines, chimes and, of course, the iconic cowbell.
Sheet music from the 1920s provides evidence that the drummer's sets were starting to evolve in size and sound to support the various acts mentioned above. However, the first "talkies" or films with audio, were released circa 1927 and by 1930 most films were released with a soundtrack and the silent film era was over. The downside of the technological breakthrough was that thousands of drummers who served as sound effect specialists were put out of work overnight. A similar panic was felt by drummers in the 1980s, when electronic drum machines were first released.