The SK18752 chip is exclusively found in audio products manufactured in Japan, predominantly used by SONY, and only rarely seen in Denon products. The SK18752 is significantly larger than the LM1875, with a package size comparable to the 5200. Due to the lack of official data, repeated testing has led to the estimation that the rated operating voltage for the SK18752 chip should be around +33V, with an output power of 30W at 8 ohms.

This device utilizes eight SK18752s connected in parallel as its output. Despite its compact size, its thrust is quite impressive. The measured continuous output power per channel is 135W without distortion, providing powerful thrust. Its sound characteristics are bright and clear in the mid-to-high frequencies, with good bass dynamics. It is pleasing to the ear. It is likely that the Japanese made special tuning adjustments when developing these products based on the M1875, coupled with better semiconductor technology. Apart from one Sony amplifier using the LM18752 chip, no other Japanese audio products have been found to use the American LM18752 circuit.

The sound characteristics of the SK18752 chip are bright and clear in the mid-to-high frequencies, with good bass intensity, making it pleasing to the ear.

Both the input and output connectors are gold-plated

Imported volume potentiometer

The volume can be independently adjusted on both the left and right sides. The volume potentiometer, imported from Japan, is of the ALPS16 type, featuring fine craftsmanship, smooth feel, stable adjustment, and durability. Its theoretical operational lifespan is 15,000 cycles

Model: A15
Power: 135W, 4-892, recommended for 3-15 inch speakers
Operating voltage: Switchable between AC115V and 230V
Dimensions: 240W x 120H x 258D mm
Weight: The net weight of the entire machine is 7.1KG