Following up on the speaker resistance and settings discussion earlier in the thread, I had previously used 8ohm setting on my LE temporarily as it’s a quick and easy way to get some brighter brights in the high end though it’s not the best way to achieve that considering the speaker impedance and the amp driving it. This weekend I took some time and made some adjustments to the sound setting’s in 4 ohm and am very happy with a nice full sound including the return of detail in the mid’s and high’s which were missing from the factory 4 ohm default settings.
Here are my settings -
Stern pinball LE speaker/audio settings (4ohm)
Select backbox speaker type
- 4 ohm
Select cabinet speaker type
- 4 ohm
Select audio filter
- HIGH/LOW Shelf (DEF)
Select blackbox bass frequency
- 250 Hz (Default)
Adjust backbox bass gain
- +3 db
Select backbox treble frequency
- 4 KHz (Default)
Adjust back box treble gain
- +8.0625 db
Select cabinet bass frequency
- 250 Hz (Default)
Adjust cabinet bass gain
- +6 db (Default)
Select cabinet treble frequency
- 4 KHz
Adjust cabinet treble gain
- 0 db
Technically the power amp should run cooler with matched impedance and you should get twice the total watts output, better sound at lower volumes and minimize distortion at high volumes. The loudest I’ve gone is about 35 and I cannot imagine what 60+ sounds like. I may have to test that. I did utilize the EQ and adjusted to taste but the high/low shelf setting actually sounded better than my “smile curve” or other adjustments.
My home theater speakers are Miller & Kreisel S-150’s (same as those used at skywalker ranch soundstage to mix SW films) 4 ohm and while they can run reasonably at 6 or 8 ohms if needed they really want the power of 4 ohm amplification.