Transformers Audio & Signal 2-500MHz IL 1dB Impedance Ratio 1:8 (100 pieces): Amazon.com: Tools & Home Improvement
Amazon.com: Sescom SES-AES-EBU-1 XLRF to 75 Ohm BNC Female AES/EBU Impedance Transformer, 0.1 to 6MHz Bandwidth : Electronics
Amazon.com: BOJACK EE-14 8 Ohm Audio Transformer 1300 : 8 Ohm for Voltage Amplification and Power Output(Pack of 10 Pcs) : Industrial & Scientific
Amazon.com: Shure A85F Line Matching Transformer - Low Z Female XLR to High Z 1/4-Inch Phone Plug connects a Balanced Low Impedance Microphone Output to an Unbalanced High Impedance Input : Everything