Hard Disk Drives. Frequency: 28Hz-68KHz. Resistance ratio: 300Ω+300Ω: 2400Ω. Super mini size, elegant appearance. Cell Phone & Smart watch. Audio output: Stereo L/R RCA. Best price, Good quality. Italy ,Russia.
I bought this step up transformer as I mainly play music through my phone...... what a difference this transformer makes... the definition becomes very much clearer and the amp comes alive. Highly recommended.