Matching the cartridge to the phono stage


Hey Everyone, I am new to this so please be gentle :) 

I am in the process of buying an amp that has the phono stage in it with the following specs with 3 options for the cartridge type MM/MC-Low/MC-High:

Moving Magnet: 2.5mV / 47kΩ

Moving Coil:

MC-High-Output: 0.3mV / 100Ω

MC-Low--Output: 0.1mV / 40Ω

LINE 180 mV / 47 kΩ

 

Now I am thinking of buying the Hana SL cartridge with the following specs:

Hana SL specifications:

  • Output Level @ 1kHz: 0.5mV

  • Output Balance @ 1kHz: Less Than 1.5dB

  • Impedance @ 1 kHz: 30 Ohms

  • Suggested Load: 400 Ohms

  • Cartridge Weight: 5 Grams

 

The preamp MC-Low says:  MC-Low--Output: 0.1mV / 40Ω

The Hana SL cartridge: Output Level @ 1kHz: 0.5mV, Impedance @ 1 kHz: 30 Ohms and Suggested Load: 400 Ohms. 

 

How do these values match ? As far as I can see I don't have the same voltage 0.5mv on the cartridge and 0.3mv on the phono preamp. I also see that 40ohm vs 30ohm. The 400ohms figure is only mentioned on the cartridge. 

Can this cartridge be used successfully with this phono stage ?

Do I need to match these numbers ? Can someone help explain this whole thing to me. 

Thanks!

ajones82

0.3mV and 0.5mV are close enough that there will be just a tiny movement of the volume control between them, so go ahead and set the phono stage to the 0.3mV input. The loading of 100Ω will do fine, but if you really want to experiment when you have got used to the sound of 100Ω load, you can always slip a resistor in series with the cable to play around with it. You probably know that resistive loading of MC cartridges is used to damp a peak in their response in high frequencies. The higher the resistive load, the less this peak is damped. So if you think you aren't getting enough top end, you might try a higher load, but to be honest, you'd need a better ear than mine to tell the difference.

Somebody will pop up to insist you must use a transformer and the MM input. I would save such experiments for much later in your career!

Thanks guys. Interesting that setting on the preamp is MC High output but you are recommending to use it for this cartridge. Btw the phono stage is Luxman L-509Z (integrated amp). I'm in the process of purchasing some of this stuff still but before I do I wanted to figure out how to match things together. 

@jasonbourne71 this is what I found about the gain: 

PHONO (MM): 87 dB or more, PHONO (MC-H):: 70 dB or more, PHONO (MC-L):: 62 dB or more

@dogberry I have no idea about resistive loading. Just trying to setup my first turntable. Very new to this :) 

@ajones82 Welcome to being a New to Vinyl user.

There are lots of little nooks and crannies of formulas lurking, when it comes to a Vinyl Source and the Trilogy of Ancillaries.

What are the other ancillaries you are planning to use the Cart' with to make up the Trilogy, i.e, Turntable >Tonearm.

 

Thanks @pindac 

I'm thinking of Rega Planar 6 with its standard tonearm with the Hana SL cart. 

That is not a very user-friendly spec sheet. This appears to be a full function integrated amplifier and so I’m assuming these mV numbers are sensitivity -- i.e. the required signal level to elicit full amplifier output with the volume control at MAX.

If we work backwards from the phono sensitivity and the stated line stage sensitivity, we can arrive at the gain levels:

  • 0.1mV corresponds to a gain of 65dB at a load of 40 ohms ( @jasonbourne71 was right): 65 = 20 * log(180 / 0.1)
  • 0.3mV to 55dB at 100 ohms
  • 2.5mV to 37dB at 47K ohms

For a 0.5mV cartridge, 60dB is ideal so typically you could go to either 55dB or 65dB. However, the Hana’s 30 ohm DC coil impedance is not a good match for the 40 ohm load listed at the 0.1mV / 65dB setting. Therefore, I would use 0.3mV / 55dB, however even THAT is not ideal, as 100 ohms load is still low for a 30 ohm coil. It will work, it might even sound very good, but you will be throwing away 2.27dB of signal (meaning your effective gain is only 52.73 dB at this setting). Quite frankly their fixed loading selections for MC present a pretty tough load. The most common "rule of thumb" is that you want a phono stage load impedance which is greater than 10x the cartridge’s coil ohms, but I have gone as low as 6x on occasion. Below that, and you will start to face problems very quickly due to signal losses. 30 ohm coils into 100 ohms load is only 3x :(

This phono stage is probably not optimal for the Hana SL, without internal modification - maybe you can change the load resistor? Most MC cartridges would do fine on this amp. The Hana SL is atypical because its coil impedance of 30 ohms is very high for its output level of 0.5mV. You will typically see 0.5mV cartridges with coils that are 5 - 15 ohms. The Hana ML, at 0.4mV and 7 ohms coils, would be a much better match here.