Bewith is a Japanese high-end car audio brand that is known for releasing one unique and revolutionary product after another. In this series of articles, we’re introducing the background and advantages of each of its iconic products, while also delving deeply into the world of car audio. This time, let’s take an in-depth look at the audio regulator.
First, let’s explain exactly what an audio regulator is. It is a unit that manages the electrical power sent to the power amp or digital signal processor and ensures the system’s safety.
No matter whether you’re talking about home or car audio, electrical power is essential for sound. Every audio unit has a circuit design that is crafted in its smallest details so that it can accurately control and amplify the audio signal. For this to work, power must be supplied in the right way. The foundation of this system is a safe electrical power supply.
Everyday use of electric components in a car such as windshield wipers or air conditioning can easily cause a drop in voltage. Listening to music could also cause the voltage to drop. When listening at high volume, for example, a bass tone could suddenly cause a large current to flow, leading to a voltage drop. In other words, we cannot possibly expect realistically to supply electrical power safely.
In recent years, there are more cars being built with current sensors that automatically shut off the alternator when power is not needed for better fuel efficiency. There are also more cars with start stop system that initiate the engine when the car starts, which can also cause a voltage drop. This environment makes it difficult to ensure the power supply for car audio. An audio regulator is a unit designed to deal with these issues.
In addition to voltage fluctuations, there are also noise issues. Noise is the ultimate enemy of the ideal audio sound. One important theme in the development of any audio unit is how to reduce noise to as close to zero as possible. There is already noise at the outside in the generation of power of an audio unit.
From the power generation stage at the alternator, a car’s power is already producing noise just from the alternator alone. Noise is also generated from every single electrical component. Car electrical power is connected and it’s easy for the noise generated in other components of the car to interfere with the audio unit. It’s not as common for there to be drops in voltage in hybrids and EVs but they’re equipped with even more electrically powered devices, so there is a great deal of noise generation. When a hybrid motor is engaged, it produces noise as well.
Bewith’s audio regulators are designed to handle noise. They create DC power of a set voltage that’s clean and safe in order to supply the power needed to the power amp and processor.
The idea of using an audio regulator makes obvious sense, but it’s not so easy for audio makers. Developing a special unit just to handle power generation is no easy task in terms of cost and time spent.
However, Bewith has consistently endeavored to do exactly this. Its first product was the Confidence speaker system, a 2-way speaker system released in 2002 that featured the world’s first ever all-eccentric cone. It followed it up just one year later with its first audio regulator, Reference R-60A. At this time, Bewith was aggressively expanding its lineup. It had a power amp, two speakers and two sub-woofers on the market. But it already had its first audio regulator on the market.
The Reference R-60A underwent a model change and in June 2007, Bewith released the new Reference R-70A. It evolved even further two years later with the February 2009 release of the Accurate A-100A.
The Accurate A-50A made its appearance in 2012. This product used an all-magnesium compound with specially designed characteristics as material for its casing, which allowed it to achieve just 650g in weight. Both compact and offering high efficiency, a next-generation audio regulator was born.
The Accurate A-50A underwent a further evolution in February 2014 to become the V-50. Like its predecessor, it used the all-magnesium composite Magneola, and also featured newly designed high speed switching and current sensing circuits and large-capacity power circuits featuring the MUSES7001 next-generation SiC diodes. It included the highest level of technology for an electrical power unit and at the time of writing, is the ultimate in safe power generation.
In this way, Bewith has continued over many years to endeavor to develop products that address the issues other makers don’t. Its one simple aim is to reproduce music faithfully from its source and its audio regulators, too, are designed toward this aim.
The world of car audio is rich with a mixture of contrasts, from low to high tech, and from analog to digital. This world gives birth to sound â€“ something we cannot see that fades in an instant. There is a great deal of wisdom to be found in this transient world. We hope that you’ve enjoyed the articles and learned something interesting along the way.
I hope that at least one time you have the chance to experience high-end car audio. You will definitely understand the depth of sound that is possible with audio. Bewith’s website lists dealerships. If there is one near you, you can experience the sound it offers in one of the demo cars. Even just one listen is a rewarding experience.
(Translated by Greg Scott)