Quick Answer / Summary: Tonearm wires are the fine internal conductors of a turntable tonearm, carrying the phono signal from the cartridge to the phono stage, typically 24 to 30 AWG solid wire. A moving magnet cartridge is soldered by the owner, a moving coil often arrives pre-wired, and the run ends at the phono RCA output with its own ground. The gauge is fine, the signal is small, and the solder joint at the cartridge is the critical connection of the run.
Tonearm wires are the fine conductors inside a turntable tonearm, carrying the phono signal from the cartridge at the stylus to the phono stage at the base of the arm. They are the shortest and the most delicate run in a vinyl system, because the signal they carry is the smallest in the chain and the wire is the fine gauge that the arm requires. The topic is the wire inside the arm, the gauge and the construction, the solder at the cartridge, and the path to the phono output that ends the run.
What the Tonearm Wires Carry
The tonearm wires carry the phono signal, the output of the cartridge as the stylus tracks the groove, and it is the smallest audio signal in the system. The moving magnet cartridge produces a millivolt-class signal and the moving coil a fraction of that, and the wire has to carry it from the cartridge to the phono stage without adding noise or losing it. The signal is the reason the wire is fine and screened, and the arm is the reason the run is short.
The Phono Signal
The phono signal is the unamplified output of the cartridge, the millivolts of the moving magnet or the microvolts of the moving coil, and it is the signal the phono stage exists to raise to line level. The tonearm wires are the first conductors of that signal, and they carry it from the cartridge at the headshell to the phono input at the arm’s base. The signal is small, and the wire is the short, clean path it travels before the phono stage amplifies it.
Inside the Arm, Not on the Shelf
The tonearm wires run inside the arm, the fine conductors along the tube from the headshell to the base, and they are not the external cable of the system. The external run is the phono cable from the arm’s output to the phono stage or the preamp, and the tonearm wires are the internal part, the last and the first few inches of the signal path. The wires are the internal run, and the phono cable is the external one that follows them.
The Fine Gauge and the Construction
The tonearm wire is the fine gauge of the internal run, commonly 24 to 30 AWG, and it is the solid conductor rather than the stranded one, because the wire is fixed in the arm and does not flex. The gauge is set by the space inside the arm and the small current of the phono signal, and the construction is the solid, screened wire that the arm’s tube holds. The fine gauge is the profile, and it is the reason the wire is a specific part rather than a general cable.
The Fine Gauge
The 24 to 30 AWG is the gauge of the tonearm wire, the fine conductor that fits the arm’s tube and carries the small phono signal without the mass of a heavier wire. The gauge is lighter than any speaker or line cable in the system, and it is the number that sets the wire apart, the fine internal conductor of the turntable. The gauge is the specification, and it is the fine one, by design.
Solid, and Screened
The tonearm wire is the solid conductor, not the stranded, because it is fixed in the arm and does not bend in use, and the solid holds the solder joint at the cartridge better than the strand. The screening, the fine braid or the foil around the conductors, is the shield that keeps the small signal clean, and it is the construction that the phono wire is built with. The solid and the screened are the two properties, and they are the construction of the wire.
Soldering the Cartridge
The solder at the cartridge is the critical connection of the tonearm wire, the joint that carries the signal from the fine wire to the cartridge terminals, and it is the owner’s job on a moving magnet cartridge. The moving coil often arrives pre-wired, the factory soldering the fine leads, and the moving magnet is the user-soldered one, the cartridge the owner wires to the arm. The solder is the skill of the job, and it is the connection the whole run depends on.
The Joint at the Cartridge
The joint is the fine wire to the cartridge terminal, a small solder connection that is clean and mechanical, the tin on the terminal and the wire seated under it. The joint is the critical one, because the signal is small and the wire is fine, and a cold or a cracked solder is the crackle and the dropout of the phono channel. The solder is the skill, and the clean joint is the standard it has to meet.
Screening and the Earth
The screening of the tonearm wire is connected at one end, the earth of the phono connection, and the cartridge earth lead is the fine ground that completes the shield. The earth is the phono ground, the connection that keeps the hum out of the small signal, and it is the wire alongside the signal pair in the arm. The screening and the earth are the shield circuit, and they are the second part of the wiring after the signal pair.
From the Arm to the Phono Stage
The tonearm wires end at the phono output of the turntable, the RCA pair and the ground at the base of the arm, and the external phono cable carries the signal from there to the phono stage. The internal wire is the run inside the arm, and the external phono cable is the run to the preamp, and the two are the complete phono path from the stylus to the line level. The arm’s output is the handoff, and the phono stage is where the small signal becomes the line signal.
The Phono RCA Out
The phono output of the turntable is the RCA pair, left and right, and the ground, the connection the phono cable plugs into, and the tonearm wires are what feed that output from the cartridge. The output is the end of the internal run, and the phono cable is the external run that follows it to the phono stage. The RCA out is the handoff, and it is where the tonearm wire’s job ends and the phono cable’s begins.
The Ground and the Hum
The phono ground is the connection that keeps the hum out of the small signal, the earth lead from the turntable to the phono stage, and it is the wire that the tonearm’s screening reaches. The ground is the second part of the phono connection, after the signal pair, and it is the one that a missing or a loose ground turns into the hum of the phono channel. The ground is the shield’s path, and it is the connection the wiring has to include.
Tonearm Wiring by Cartridge Type
| Item | Moving magnet | Moving coil | Note |
|---|
| signal level | millivolt class | microvolt class | the small signal |
| wire gauge | 24 to 30 AWG | 26 to 30 AWG | the fine internal wire |
| soldering | owner soldered | often pre-wired | the critical joint |
| screening earth | to the phono ground | to the phono ground | the hum path |
Practical Applications
Where the tonearm wires work: the moving magnet cartridge soldered to the arm’s fine leads, the moving coil’s pre-wired internal run, the upgrade of a turntable’s internal wiring to a better phono wire, and the repair of a crackled channel traced to the solder at the cartridge. In each, the tonearm wires are the fine internal conductors of the arm, carrying the smallest signal in the system from the cartridge to the phono output, screened and earthed to keep it clean.
Frequently Asked Questions
What are tonearm wires?
They are the fine internal conductors of a turntable tonearm, carrying the phono signal from the cartridge at the stylus to the phono stage at the arm’s base, typically 24 to 30 AWG solid, screened wire.
Do I solder a moving coil cartridge?
Usually not, a moving coil often arrives pre-wired with the fine factory leads. The moving magnet is the owner-soldered cartridge, and the moving coil is the one that is commonly pre-connected to the tonearm wires.
What gauge is tonearm wire?
The fine gauge of the internal run, commonly 24 to 30 AWG, the solid conductor that fits the arm’s tube and carries the small phono signal. It is lighter than any external cable in the system, by design.
Why does my phono channel crackle?
The usual cause is the solder at the cartridge, a cold or a cracked joint on the fine wire, or the cartridge seating loose in the headshell. The check is the joint and the seat, because the small signal shows a bad connection as crackle and dropout.
Is the tonearm wire the same as the phono cable?
No, the tonearm wire is the internal run inside the arm, and the phono cable is the external run from the turntable’s phono output to the phono stage. The two are the internal and the external parts of the same phono path.
