How to choose cabs and amps

A well-designed sound system is important for any musical production. This is not only about concerts in clubs and at festivals. Band rehearsal rooms, theatres, presentation rooms and school auditoriums all benefit from a good sound system. This shopping advice will familiarise you with the assortment of products and teach you how to produce the sound at your event.


The foundation of all good sound systems is sufficiently powerful cabs, an amplifier and perhaps a mixing console and microphones. If you are looking for a simple sound solution for your event, we recommend buying a complete sound system set with an amp, cabs, mixing console, stands and cables, i.e. everything you'll need for any event. You can then connect anything to the mixing console to produce sound – a mike, musical instruments, a music player, computer, etc.

Our experts are ready to answer any questions and to recommend the ideal solution for your sound system. You can call us at 020 8089 1481 ( Mon–Fri 9:00 a.m.–4:00 p.m.) or send us your questions by email to .

  • 1 - Speaker adjustment
  • 2 - Input gain adjustment
  • 3 - Balanced microphone/line input
  • 4 - RCA (cinch) input
  • 5 - Inlet socket

Cab types

Cabs can be divided into four basic groups:

PA speakers – intended for sound reproduction
Stage monitors – allow performing musicians to hear themselves play
Mobile with batteries – intended for sound reproduction anywhere and anytime
Subwoofers – for reproducing bass frequencies

Active and passive cabs

Cabs can also be divided into active and passive. Active cabs differ from passive cabs in that they have their own built-in amp, so you can simply plug them in and they will work. Passive cabs do not have their own amp and must be connected to an external amp.

The following parameters are important when choosing an active cab: power rating and SPL value in decibels. The higher these values, the greater the acoustic pressure the cabinet can take, allowing it to be used in a larger space. When choosing an active cab, also take a look at its inputs (connectors). XLR inputs are used to connect microphones, 1/4" TRS jack connectors for musical instruments or mixing consoles .RCA connects, also known as cinch connectors, are most commonly used for external players.

Passive cabs can only be combined with an amp that has the proper parameters, particularly power rating and impedance. Power rating is stated in watts, impedance in ohms.

Both solutions have their advantages. For beginning bands and those who want to keep their sound system simple, we recommend active cabs due to their practicality.
But if your goal is to put together a more sophisticated sound system with a greater number of cabs, you might want to think about passive cabs connected to a high quality end amp.

Mobile cabs with batteries

If you want to be fully independent and are looking for equipment you can take anywhere, buy yourself a mobile sound system with batteries. Many of these devices also come with a microphone. In addition to microphone inputs, this equipment usually also has line inputs for connecting musical instruments (guitar, keyboards) or music players/telephone/computer. Battery-powered sound systems are popular not only with street performers; they help you be heard anytime and anywhere.

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