@rickysnit It’s typically not good practice to increase the capacitance of any circuit by itself without adjusting the design of the rest of a circuit. In some cases, people may do so say in a speaker crossover, but it can introduce both improve and degrade the sound. Generally when replacing a capacitor, you will want to stay within 5-10% of its rated capacitance, as most capacitors and circuits are designed to sway this amount. The voltage rating on the other hand is there for safety / integrity purposes. If you increase this on a capacitor, you’ll just end up with a capacitor that has a larger form factor with no sonic benefits, but if you unit fries due to a surge, this capacitor might live where others might fry out.
What people often do is upgrade to different capacitor brands and models in a similar way to how people roll tubes to tailor the sound. In this case people will generally stay within the same capacitance and voltage values as the original capacitors.
Often times manufacturers put in lesser quality capacitors to meet price points. They may feel the end result in these designs meets their expectations and don’t push further. Much of the DIY community likes to tinker here, and I did so myself when it was easier for me to access improvements this way instead of purchasing better performing gear.
Here is a website that’s been around a long time that document’s one person’s experiences and ratings in capacitor rolling for speaker crossovers. I find his observations to be valid when using these capacitors in other places like preamps and amps.
https://www.humblehomemadehifi.com/Cap.html
