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selector switch.
3. Trim the leads of the capacitors (one required per channel) to approximately _ inch.
4. Insert the leads into the CLOAD pin receptacles securely.
Resistive Loading
NOTE: The PRO10 is shipped from the factory with a 100 Kohm resistor installed and the phono stage
MM configuration selected. This resistor should not be removed unless the resistive loading is being
changed in accordance with the following guidelines.
1. Determine the resistor value for proper loading of the cartridge in accordance with the
specifications of the cartridge you have selected. A recommended value may be suggested by the
manufacturer of the cartridge. The resistive loading affects both the MM and MC stage.
The resistive loading for the MM stage can be calculated using the following equation:
Ri (in Kohms) = (100,000 * Rc) / (100,000 - Rc)
Ri = inserted resistor value
Rc = cartridge loading value (must not exceed 100Kohms)
Kohms = 1,000 ohms
example:
Rc (desired) = 50 Kohms
Ri = (100,000 * Rc) / (100,000 - Rc)
Ri = (100,000 * 50,000) / (100,000 - 50,000)
Ri = (5,000,000,000) / (50,000)
Ri = 100,000 ohms = 100 K ohms (factory installed)
The resistive loading for the MC stage can be calculated using the following equation:
Ri (in ohms) = (133 * Rc) / (133 - Rc)
Ri = inserted resistor value
Rc = cartridge loading value (must not exceed 133 ohms)
For Ri >> 1300, Rc = 133 ohms
example:
Rc (desired) = 100 ohms
Ri = (133 * Rc) / (133 - Rc)
Ri = (133 * 100) / (133 - 100)
Ri = (13,300) / (33)
Ri = 403 ohms (use 402 ohm standard value resistor)
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