In our naivety.....we have always believed that the extra connections involved in interchangeable headshells, DIN plugs, SUTs etc MUST cause 'losses' in the signal chain compared to an unbroken single cable from cartridge to phonostage.....
Then I read the statement by John Elison (which was posted on Vinyl Asylum) proving that the 'signal losses' involved in 'connectors' were a fraction of the signal losses caused by the increased length of phono cable....as 'signal loss' was proportional ONLY to Resistance....🤗
Here is what I posted on WTBF in reply to the 'Troll' DaveyF:-
Originally Posted by DaveyF
The ability to change cartridges easily is not the reason most manufacturer's went away from the removable headshell. The reason is that the signal loss at the headshell junction to the arm was clearly heard by a'philes as their systems gained in resolution.I've never seen nor heard 'proof' of this...?
Add to that the increase in rigidity of the fixed headshell vs. the removable headshell and the result is that the removable headshell design became a thing of the past...
SME themselves were one of the first manufacturer's to go this route. ( and for VERY good reason, IMHO).
Audiophiles can easily 'convince' themselves of 'imagined' differences...as we all know too well
The maximum possible resistance of a single gold-plated connector is 0.01-ohm whereas the resistance of 4-feet of 33-gauge wire is 1.0436-ohms. The resistance of 1-foot of 33-gauge wire plus 3-feet of heavier 26-gauge interconnect wire and 6 gold plated connectors is 0.2609 + 0.12243 + 6 x 0.01 = 0.44333-ohms. Signal loss is proportional to resistance; therefore, the continuous 33-gauge wire has over twice the signal loss as the combination of wire with 6 connectors.In other words....the 'signal loss' with your continuous, unbroken 4 feet of tonearm cable to phono-stage, is at least twice that of a tonearm with interchangeable headshell.
Signal loss is proportional to resistance only. In other words, the small voltage and current of a phono cartridge signal has no greater impact to the signal loss as would a much larger voltage and current. This is why having some formal education in electrical theory helps. It might seem like the minuscule voltage and current from a phono cartridge will be more susceptible to signal loss than higher line level voltages and currents, but that's not the case. Signal loss is proportional to resistance, only.
Best regards,
John Elison
Some education in Structural Engineering would also be helpful before making assumptions on 'rigidity'.
The 'bayonet and locking collar' arrangement standardised for removable headshells, creates what is called a Moment Connection in Structural Engineering.
This means that all Bending Stresses, Shear Stresses and Deflections at the joint are transferred without loss.
In fact....this form of structural coupling is more rigid than many 'fixed' headshells....especially those connecting metal shells to wood tonearm bodies.
Most fixed headshells are secured by 1 or 2 screws which have little ability in creating a Moment Connection.
As you say Raul...... our "ignorance" levels rarely prevent us from posting 🤪