Posted by crazychile on July 05, 2002 at 15:21:14

Wayne- I noticed in the plans you sent me for Thermionic 3 pi's that the resistors should be rated at 40watts. Some of the resistors I am thinking about using are 12watt and so three of them in parallel would only be 36watt. Is this close enough? Some of these resistors are kind of expensive so I wondered if I could save a few bucks.

Also, How critical are the resitor values given that the tolerances of most power resistors are 5-10%? The reason why I ask is in my search for parts sometimes I cannot find an exact value, (15ohm instead of 16, 27ohm instead of 25, ) and I'm wondering if I vary this slightly if it will be audible. (especially on the tweeter)

Would you recommend that I not vary from a round port? I tend to favor how a rectangular port can sometimes be less prone to noise. Can I do a rectangular port as long as the total port area remains the same?

Thanks for your patience- I bet you just love it when guys ask questions about changing your (proven) design....

Eat Mo' Hot Sauce...
crazychile

• as per Adam, you can de-rate - Sam P. 19:19:37 07/05/02 (0)
• Re: Resistor wattage and other questions...... - Adam 15:46:29 07/05/02 (8)
  • That's it! - Wayne Parham 15:57:50 07/05/02 (7)
    • Re: That's it! - crazychile 19:48:07 07/05/02 (6)
      • Re: That's it! - Paul C. 21:23:05 07/06/02 (5)
        • 1 More thing - Paul C. 21:27:08 07/06/02 (4)
          • Re: 1 More thing - Adam 08:56:27 07/07/02 (3)
            • Re: 1 More thing - Paul C. 16:00:46 07/07/02 (2)
              • Re: 1 More thing - Adam 16:35:27 07/07/02 (1)
                • Re: 1 More thing - Paul C. 20:52:08 07/08/02 (0)