In the pinball machine system menu, we recommend to set your audio settings to:

• UTIL >  Vol > Backbox Speaker Type > 8 Ohms
• UTIL >  Vol > Cabinet Speaker Type > 8 Ohms
• UTIL >  Vol > Filter Freq > 250 Hz
  

If you need more volume / power while playing, adjust these settings to your preference (minus means more volume):

• ADJ >  Feature Adjustements > Music Attenuation > -20
• ADJ >  Feature Adjustements > Speech Attenuation > -15

1. You’ll need a RCA to RCA cable
2. Connect the cable onto the Subwoofer OUT RCA connectors (on the PINBLASTER board)
3. Connect the cable to your external subwoofer
4. Adjust individual subwoofer gain to your preference

A maximum of six machines is recommended for optimal performance, but the system is fully compatible with fewer machines as well.

1. You’ll need RCA to Jack 3.5 cable(s)
2. Connect a cable to the first PINBLASTER board onto the Subwoofer OUT RCA connectors.
3. Run this cable to the next adjacent machine and connect the Jack 3.5mm stereo into the Subwoofer IN input.
4. Repeat with the next machine (if needed)
5. On the last pinball machine of the chain, connect the RCA OUT to the external subwoofer
6. Adjust individual subwoofer gains to your preference.

• Starting the Connection: Use the RCA line-out available on your PLUS sound board as the initial point of the external subwoofer daisy-chain.
• Connect a Ground Loop Isolator: Place a ground loop isolator between the PLUS sound board and the first PINBLASTER in the chain. This is mandatory to protect the integrity of the daisy-chain signal and the connected boards.
• Extending the Chain: To add more PINBLASTER boards to the daisy-chain, simply use a standard stereo RCA-to-jack 3.5 cable for each subsequent connection (no ground loop isolator needed)

Check for any misinserted pins in the black connector:

In doubt, remove the PINBLASTER board and check the CN3 and CN5 pins on your SPIKE 1 adapter.

If this backbox filter is present, make sure to bypass it: