Home » Sponsored » Pi Speakers » Not so "Easy-as-Pie" One-Pi's
Re: Q on Tweeter XO [message #49768 is a reply to message #49767] Tue, 25 July 2006 09:25 Go to previous messageGo to previous message
Wayne Parham is currently offline  Wayne Parham
Messages: 18787
Registered: January 2001
Illuminati (33rd Degree)

The tweeter is actually about 1dB lower than the midwoofer. But if you need to reduce its output a little more, you can always use a series/parallel resistor combination. Be sure to do some modeling or measurements to set the Q of the circuit, to ensure that its damped enough that a peak doesn't form. That's what the 16 ohm resistor is for - It's a damping resistor. If you add series resistance to reduce tweeter output, you'll need to change the value of damping resistor.

The 16 ohm damping resistor is only barely necessary on the stock circuit, because even without it, there is very little peaking. But amplifier output impedance and feedback change the characteristics of the circuit, so the damping resistor ensures that the circuit is well damped even in non-optimal conditions. If you increase series resistance to pad the tweeter, you'll probably find the shunt resistor used for damping should be a smaller value. This will increase damping and will attenuate the tweeter more at the same time.


 
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Previous Topic: Pics - finished pi stage4
Next Topic: Sometimes is difficult to get a screw... oops!!!
Goto Forum:
  


Current Time: Tue Nov 26 07:07:06 CST 2024

Sponsoring Organizations

DIY Audio Projects
DIY Audio Projects
OddWatt Audio
OddWatt Audio
Pi Speakers
Pi Speakers
Prosound Shootout
Prosound Shootout
Miller Audio
Miller Audio
Tubes For Amps
TubesForAmps.com

Lone Star Audiofest