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
Amazon.com: Sescom SES-LZSLHZ-XF14 Professional Low Z to Switchable Lo or Hi Z Impedance Matching Transformer : 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: Lowell TLM-600 Impedance Matching Transformer, 70/25V In to 600/8 Ohm Out : Electronics
Amazon.com: Electro-Voice EVID 4.2T 4" Two-Way Surface-Mount Loudspeaker, 70V/100V Transformer, 65Hz-20kHz Frequency Response, 8Ohm Nominal Impedance, Pair, Black : Electronics