Our employee is happy to help you find the right product
The Lundahl LL1684 is a high-level amorphous core general-purpose transformer for microphone and line input, line output, galvanic isolation and phase-splitting applications.
Lundahl LL1684 High-Level Amorphous Core General Purpose Transformer
The Lundahl LL1684 is designed as a versatile high-level transformer for professional audio signal paths. It can be used in audio components for microphone or line input, line output and galvanic isolation, making it a practical choice for balanced signal interfacing and isolation tasks.
Its 1 + 1 : 1 + 1 winding structure allows multiple connection options, including parallel-parallel 1:1 operation for low-loss isolation and serial-serial 1:1 operation for high-level line isolation. The winding arrangement also provides excellent symmetry when the transformer is used for phase splitting in 1 : 1 + 1 input configurations.
The two-coil construction improves immunity to external magnetic fields from nearby power supplies and motors. Primary and secondary windings are separated by electrostatic shields, and the complete transformer is housed in a mu-metal can, supporting clean integration in sensitive signal circuits and electromechanics projects.
Key electrical specifications include 41 ohm static resistance per primary and secondary winding, a self-resonance point above 250 kHz, and a 10 Hz to 100 kHz frequency response within ±1.0 dB with a 150 ohm source and 10 kΩ load in serial connection. The transformer measures 42 x 28 x 22 mm above the PCB, weighs 81 g, uses 5.08 mm pin spacing and has a recommended PCB hole diameter of 1.5 mm.
Show more
Show more
There are no reviews written yet about this product..
Home audio 
Audio components 
Crossover components 
Test & measurement 
DIY kits 
Accessories 
New products 
Speakers
Amplifiers
DAC converters
DSP modules
Turntables
Streamers
Woofers
Tweeters
Exciters
Bass shakers
Plate amplifiers
Amplifier modules
Single board computers
Assembled crossovers
Printed Circuit Boards (PCB)
Capacitors
Resistors
Coils
Circuit Breakers
Crossover tools
Screw terminals
Acoustic measurements
Electric measurements
Sound level meters
DIY amplifier kits
DIY component packs
DIY speaker kit
DIY subwoofer kits
DIY bluetooth speaker
DIY electronics kits
Binding posts
Cabinet Hardware
Cables
Connectors
Speaker cabinets
Electromechanics
Power supplies
Speaker repair
Workshop & tools
Amplifier accessories
Stands & mounts
Gift voucher
Books
New products
Speakers
Amplifiers
DAC converters
DSP modules
Turntables
Streamers
Woofers
Tweeters
Exciters
Bass shakers
Plate amplifiers
Amplifier modules
Single board computers
Assembled crossovers
Printed Circuit Boards (PCB)
Capacitors
Resistors
Coils
Circuit Breakers
Crossover tools
Screw terminals
Acoustic measurements
Electric measurements
Sound level meters
DIY amplifier kits
DIY component packs
DIY speaker kit
DIY subwoofer kits
DIY bluetooth speaker
DIY electronics kits
Binding posts
Cabinet Hardware
Cables
Connectors
Speaker cabinets
Electromechanics
Power supplies
Speaker repair
Workshop & tools
Amplifier accessories
Stands & mounts
Gift voucher
Books
New products
