prism orpheus and LP's
On Wednesday, June 10, 2015 at 2:53:47 AM UTC-6, Trevor wrote:
The line inputs are 14.5K and the mic press are 5.5K
If you just pad the line inputs with a 33kOhm resistor, you'll lose some
level,
Which you can't really afford to do when you are only starting with a
few millivolts and applying a huge amount of post EQ.
And you'll add a bunch of noise with that 33k resistor. The level problems will get ya before that, though; nominal output level on a typical magnetic cartridge is about -45dBu, which doesn't fit well with either a +4dBu or -10dBV (about -8dBu) line input.
The proper parallel resistor for a 1M input impedance is 49.9k.
Doing the EQ in software actually works, and if you record in 24 bits you've got plenty of dynamic range to work with.
No, what Nate did is probably the most effective method. Short of getting a decent phono preamp, which the $10 units aren't.
Peace,
Paul
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