Low impedance amplifier

Low impedance amplifiers work in the same way as standard impedance amplifiers, but they offer a lower electrical resistance to current flow. They therefore require less power to operate.

They therefore allow direct connection to loudspeakers. However, be careful about the type and length of the connecting cables, as they will have an impact on how well the system works. When the distance between the amplifier and the loudspeakers is great, the energy lost in the cables will exceed that consumed by the loudspeakers. This will result in a loss of power.

It's important to make sure that the amplifier is capable of supplying enough power for the speakers. It is also important to ensure that the amplifier is compatible with the impedance of the loudspeakers.

In general, we recommend choosing an amplifier whose power rating is at least equal to the power handling of the loudspeakers. You should also choose an amplifier whose output impedance is compatible with the impedance of the loudspeakers.

Rondson offers a range of low impedance loudspeakers compatible with our amplifiers.

The choice between 4 Ω and 8 Ω depends primarily on your speakers and your installation setup:

• 8 ohms is the most common standard impedance in professional installation sound systems. The majority of passive speakers operate at 8 Ω. This is the safest and most versatile choice.
• 4 ohms allows the amplifier to deliver more power (usually double compared to 8 Ω). However, the amp is under more strain and generates more heat. This choice is suitable when you need more power with a limited number of speakers.

Fundamental rule: the total impedance of your speakers must never be lower than the minimum impedance supported by the amplifier.

The main difference lies in the audio signal distribution method. A 4 Ω or 8 Ω low impedance amplifier sends the signal directly to the speakers, offering better sound fidelity and high-quality stereo reproduction. On the other hand, a 100V line amplifier uses transformers to increase the voltage, allowing many speakers to be wired over very long distances (up to several hundred meters) with minimal losses.

A low impedance amplifier is the best choice when:

• You are providing sound for a small to medium-sized space (under 200 m²): bar, restaurant, shop, gym, meeting room.
• You are looking for high audio quality with stereo sound, deep bass, and superior sound fidelity (high-end background music, sound design).
• Wiring distances are short (under 50 m between the amp and speakers).
• You want a quick and easy installation with a limited number of speakers.

Conversely, opt for a 100V system if you need to cover large areas, run cables over long distances, or connect a large number of speakers.