If it is a new machine, Taobao has the price and the output power. The one with higher power has better sound quality.

If it is an antique power amplifier from decades ago, it is on the verge of being scrapped. If the price is 200-300 cheaper, you can buy it for fun. If it breaks, don’t use it. ---It’s not good if it doesn’t have original accessories. repair.

The sound quality is better if the output power is higher. How many high-power tubes are there in the amplifier? Only then can we estimate the power.