Zyx Universe. O.24 mv vs .48 mv with low eff spkrs


I have a dilema

My Zyx Universe .24mv cartridge appears to be loosing its suspension characteristics. I believe an arm bearing not moving freely put too much wear on it.

I have 84 db speakers and have to crank at pretty high levels to get my volume up far enough to resolve things.

I know a .24 mv is going to have slightly more resolution and speed but woud I be better going with the .48 and having less stress on the amplification and higher output volumes?
128x128audiotomb

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Amplification is a chain to your speakers. And it is useful when you realized that Volume and Gain (internal amplification) are 2 different things.
I think you will have a proper Amp to drive your speakers, then the next critical detail is the matching between Preamp output to Input Amp. When the amp needs a stronger input signal than your preamp can deliver, you will have a loss in Gain and you can only compensate it with the volume poti. But this is something you can check on your own. When they match then you are normally with the volume poti at 09.00....
Same is for your Phonostage connected to your Preamp, they should match, too. A 0.24mV cartridge needs normally Phono Gain in the area of 62-65dB. When this is not sufficient then you can only compensate that with a better Preamp, or with a higher Gain setting in your Phonostage.
When your phono gain is probably at 55dB max, a 0.24mV Cartridge is too weak (or your Phonostage is too weak), this means, all the advantages of a low output MC Cartridge are useless because you will never hear it.
That is the reason why a lot of carts are offered with higher outputs, 0.5mV+
When you made this controlling, you will know what you can do to improve that. Normally it is the cheapest way to switch to a cartridge with higher output (a different Preamp or Phonoamp is generally more expensive when you look for something serious).
No matter what will be, a Preamp (and a connected Phonostage) are the brain of the System. They are responsible for a lively or a static performance). Amplifier power is cheap and there are a lot of good units out there. But good Preamps are much harder to find. But, when you made the right decision and only the internal Phono gain is too weak, So, go for a higher output MC when you don't want to change parts of the hardware...
0.24mV carts are better BUT you need the right working area for these.
it was great volume synergy before dropping to lower efficiency speakers...

Think so, too. With your amps I would use Electrostats.....I know, there are very strong tube amps out but see it with a car explanation, a low efficiency speaker is like a fat car, for example a Mercedes 500, your amp is like a strong engine. When you accelerate, all is fine but when you drive small, curvy rads with a lot of speed changes, the MB500 can do that but it is work and you will feel, it is not made for that. Same engine in a car with half weight (= a high sensitive speaker) and all those accelerations, curvy driving is easy like breathing. You have much more fun with driving, or with listening to subtle details. OTL are a match for Stats (or Horns) based on their Design. Here you get the best out of it.

Normally are Zyx carts durable, but a defect Arm kills every suspension. I did never trust Triplanar for example, my choice is Graham Phantom.