Exceptionally high level, high bandwidth, low distortion 600 Ohm or 200 Ohm input transformer. Suitable as replacement for the original transformer in Trident A range, B range, Fleximix and other vintage recording studio units. No uncancelled DC permitted in primary or secondary windings. 70% Mumetal/30% M6 laminated core for minimal distortion even at very high levels. Very high inductance ensures an input impedance of at least 1000 Ohms over a wide frequency range when the secondary is loaded with 50k Ohms. Heavy Mumetal screening can to ensure immunity from hum fields.