When it comes to the three major Japanese amplifiers, I think it boils down to the YAMAHA PC4002 series, the TOA P320D, and the RAMSA WP-9440. The WP-9440, in particular, is a monster amplifier equipped with an outstandingly powerful power supply, featuring four screw-type capacitors specifically made for this amplifier, with a diameter of 80mm, a height of 100mm, 105V, and 30000μF. The sound that comes out of it is like nothing else, faithfully reproducing even the expressions of the artists as if they were alive and approaching you. The model year is 1995, making it the final model of the 9440 series. While there are dents and scratches on the exterior, it is in good condition for a 30-year-old product. Regarding operation, the protector takes about 1 minute and 30 seconds on the left side and about 1 minute on the right side to release during a cold start after being left unused for about a week. However, if it is turned on every other day, it releases in about 10 seconds. However, the left side takes longer than the right side, and the protector may activate again for about 5 minutes after the power is turned on, but it will be released after waiting for about 20 seconds. Please understand and acknowledge this before purchasing. The packed weight exceeds 35kg, so it will be shipped via Sagawa Express.