Audio2000'S ACC3100 XLRF to 1/4" Male 500 to 50k Ohm Impedance Matching Transformer 1/4-Inch male to XLRF with 500-Ohms to 50,000-Ohms impedance matching audio transformer 8-Inch-long and 8mm-thick high-performance connection cable Gold-plated XLRF connector Gold-plated 1/4-Inch connector Excellent craftsmanship and material