Amazon.com: RADIO DESIGN LABS STP-1 RDL UNIVERSAL AUDIO ATTENUATOR, NUMBER OF CHANNELS: 2, APPLICATIONS: CONVERT 8 OHM, 25 V OR 70 V SPEAKER OUTPUT TO 600 OHM INPUT : Electronics
Amazon.com: Radio Design Labs RDL STR-19B Stick-ON Series 19" Racking System - 10 modules : Electronics
Amazon.co.jp: RDL EZ-ADA4 Stereo Audio Distribution Amplifier by Radio Design Labs : 家電&カメラ
Amazon.co.jp: RDL TX-PA40D Stereo Audio Power Amplifier 40 Watt with 24 Vdc Power Supply Class D Output Circuit - Power Supply Included by Radio Design Labs : 家電&カメラ