Lundahl LL1584-PHF3MX Audio transformer

LL1584-PHF3MX is a transformer isolation unit for unbalanced-to-balanced conversion. The LL1584-PHF3MX is typically used when connecting an unbalanced preamplifier to a power amplifier (with balanced XLR connector).

Transformer turns ratio                                    1:1
Connectors:                                                        XLR-F — XLR-M
Cable Length:                                                     No cable
Max Prim. Level. 1% dist, 50Hz:                     17 dBU

Electrical characteristics

• Transformer static resistance primary + secondary:                        640 ohms

• Core:                                                                                                       Amorphous strip core

• Max signal level (THD less than 1%):                                                   +17 dBU @ 50 Hz

• No-load impedance @0 dBU, 50Hz                                                     11 k ohms typically

• Frequency response @ 0 dBU (source 150 ohms, load 10k ohms)      10 Hz - 70 kHz +/- 0.5 dB

• Distortion (THD) at 50 Hz (source 150 ohms)                                      < 0.2 % @ 50 Hz, for all signal levels -2 through

                                                                                                                            +16dBU      

• Loss across transformer with load 10k ohms                                       0.5 dB

• Isolation between input and output sides:                                            1 kV