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Re: PI 4 Upgrades [message #93647 is a reply to message #93645] Sun, 02 May 2021 14:31 Go to previous message
Wayne Parham is currently offline  Wayne Parham
Messages: 18670
Registered: January 2001
Illuminati (33rd Degree)

The Radian 475BePB should work, but I haven't tested it. Not sure about the exit angle and whether it matches to entrance of the H290C. Also, you would want to match the sensitivity using R1/R2 values from the chart below:
               dB        R1        R2
               ========================
               6dB     12 ohm    30 ohm
               8dB     12 ohm    20 ohm
               10dB    16 ohm    16 ohm
               12dB    25 ohm    16 ohm
               14dB    30 ohm    14 ohm
               16dB    40 ohm    12 ohm
               18dB    50 ohm    12 ohm
               20dB    75 ohm    12 ohm
               ========================
 
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