Boss offers four different metronomes with a wide range of features and sizes.
Boss bills the DB-90 Metronome as “the most advanced metronome available” and they are right. It is much more than just a clicking metronome. It is the granddaddy of metronomes and there is nothing else on the market which matches its features:
Tempo range of 30 to 250 beats per minute.
Numerous rhythm patterns, including shuffle, funk, jazz, blues, techno, house, country, reggae, claves, salsa, rumba, bossa, and more.
It will subdivide the beat and accent different beats for different meters.
It talks! The DB-90 has a human voice counting feature to mark each beat of the measure.
It has several inputs and outputs, including a MIDI input that allows you to sync the metronome with an external sequencer.
It measures approximately 5 x 6.5 x 1.5 inches and weighs one pound, and it can operate on battery power or with an AC adaptor.
It has its own built-in speaker, but if you need it to be louder you can easily plug it into an external speaker.
Of course, since the DB-90 is the most advanced metronome, it is also the most expensive, but you do get what you pay for. If you want a metronome with every bell and whistle available, this is the one for you. If you are just looking for a talking metronome, try MetronomeBot.
The Boss DB-60 Metronome is a scaled-down version of the DB-90 with a lower price tag. It has several rhythm patterns and is capable of playing in many different time signatures. It can subdivide the beat in many ways, too. It has a headphone output that can also be plugged into a speaker.
A couple of main features from the DB-90 are missing from the DB-60: it does not have MIDI inputs and it does not speak the beat. Even though the DB-60 is less expensive than the DB-90, you may want to consider the DB-30 for a good metronome with several basic features.
The least expensive Boss Dr. Beat metronome is the Boss DB-30. Even though it costs less than the others, it has several great features, and it is very easy to use. It does not have the same number of pre-programmed rhythm patterns as the other Dr. Beat metronomes, but it does have 9 different types of rhythms with 24 variations on those patterns. You can also program several different time signatures and have it subdivide the beat in many different ways. The DB-30 also has a “tap” feature which allows you to quickly access your desired tempo by tapping the beat on one of the metronome’s buttons.
The DB-30 has a headphone output that can also be plugged into a speaker. Another great advantage of the DB-30 is that it is very small and lightweight. Part of the reason that it is so light is because it uses a CR2032 lithium battery. It easily fits into an instrument case, making it very convenient.
If you are looking for a basic metronome and a tuner, consider the Boss TU-80C Chromatic Tuner & Metronome. It does not have the same rhythm pattern features as the Dr. Beat metronomes, but it has duple, triple, and quadruple subdivisions of the beat as well as a few patterns. You can also use the TU-80 to tune your instrument, either through the built-in microphone or through the input jack for guitar and bass. The TU-80 uses two AA batteries. It is small and lightweight and easily fits into most instrument cases.