AK4958EG-L IC AK4961ECB AK4961ECB-L AK4962ECB AK4962ECB-L AK4A 2P A-K4P-M12-S-G-2M-BK-2-X-A-4-69 A-K4P-M12-S-G-5M-GY-2-X-A-4-69-075 AK-4XRS485/422 AK50