Benz micro glider cartridge loading advice needed.

Not to hijack this fine thread... I wish someone could, in a new thread explain why in the heck phase inversion is used in the first place.  I have a system full of CJ equipment and it gets confusing about weather to flip the speaker wires or not..

@quincy No hijack at all. I totally agree with you about this whole phase inversion issue. Color coded wires on the carts are there for a reason and are universal. So, if a manufacturer needs to invert it for some reason, why don't they just insert a toggle switch internally? Would be a heck of a lot easier than to have to deal with tweezers and changing the wires. And I don't know about you, but if you look at my virtual system, it is not so easy to change the polarity of my speaker wires. Maybe someone can tell us why the phase inversion is necessary at the cart. 

Regards 

@judsauce @quincy 

Absolute phase.

Think of it this way - 

If you have cone speakers and absolute phase is correct the drivers first inpetus is to push out and then back as the signal is applied.

If the absolute phase is reversed the cones first inpetus is to suck in instead of out when the first signal is applied.

When the absolute phase is correct with cone speakers I generally hear a more natural sound, when it is wrong I generally hear a slightly flattened soundstage, and at worst slight compression in the mids.

With electrostatics such as @lewm runs, his speakers, unlike most  cone speakers, are pushing sound both frontwards and backwards so the effect is less apparent.

The problem with Conrad preamps is that most of them invert absolute phase in the line stage, so you simply reverse the + and - connections at the speaker.

However if you have a phono stage that inverts phase ( and the line stage does not ) then you can't reverse the + and - at the speaker because the CD or digital will then be out of absolute phase. In this case the best solution is to reverse the + and - connections on the cartridge for each channel.

Here’s a way to think of it. No one is “using” phase inversion. It’s simply a fact that some gain topologies invert the phase of the incoming signal, and some don’t. Designers choose a gain topology based on their personal beliefs about how to realize maximum gain, linearity, bandwidth, etc, with lowest distortion, regardless of how their choices affect the phase of the amplified output signal with respect to the input signal that must be amplified (and for phono, which must be RIAA filtered in the process). Then they inform the end user that the circuit “inverts phase”. That means input vs output. I personally think it’s a tempest in a teapot for most of us. If you’re as sensitive to absolute phase as Dover, there’s a 50-50 chance you’ll prefer the phase inverted output to a non-inverted signal, for a given track on a given LP. Because the phase characteristics of recorded material are all over the place. But if you want to worry, I’d look for a preamp or phono stage with a “phase” switch, unless you enjoy crawling on the floor to swap speaker wires or, god forbid, swapping cartridge connections for every track.

@dover ​​​

@lewm 

Thank you both for extremely informative and well written posts. It totally shines a light on a subject I knew very little about. I'm going to have to normal up the leads on my cart for my new phono preamp. I don't look forward to it. I first inverted the leads years ago for my SFP1 preamp, but I did it before I set up the cartridge for the table. This time I'm going to swap and normal up the leads while the cart is still on the arm. Wish me luck! 🙄

Thanks again