Author Topic: Phono preamp input sensitivity/impedance question  (Read 447 times)

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Offline radiohead

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Phono preamp input sensitivity/impedance question
« on: Apr 11, 2017 at 08:13 AM »
Hello, I am currently auditioning a Musical Fidelity LX-LPS phono preamp. Compared to my Musical Fidelity V-LPSII, both share the same input impedance (47K ohms for MM, 100 ohms for MC). The LX-LPS has input sensitivity listed as 3.0 mV for MM and 300 for MC. The V-LPSII has 3.5 and 450 respectively.

Using a Denon DL110 cart, I prefer using the MC input of the XLPSII. It just sounds "fuller" than the MM. But in the newer LX-LPS, the MC input just sounds a lot louder as compared to the VLPSII. In this case, I prefer using the MM input which has a higher gain as compared to the VLPII's MM input.

If i were to choose the best setting, I would go with the MM input of the LX-LPS, followed by the MC of the VLPSII. The MM of the VLPSII is weak in terms of volume while I find the MC of the LX-LPS too loud (as in cd player loud). Does this mean that lower input sensitivity produces higer gain? Does this make any sense?

Offline lithium_deuteride

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Re: Phono preamp input sensitivity/impedance question
« Reply #1 on: Aug 16, 2018 at 10:58 AM »
That Denon cart is MC right?  I'm surprised you can use the MM inputs on the MF phono-stages.  Unless you are using a step-up transformer?
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Offline radiohead

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Re: Phono preamp input sensitivity/impedance question
« Reply #2 on: Aug 16, 2018 at 12:33 PM »
That Denon cart is MC right?  I'm surprised you can use the MM inputs on the MF phono-stages.  Unless you are using a step-up transformer?

It's a high output MC so you can plug it directly to the MM input of the phono stage.