(Topic ID: 259900)

Speaker Spec?

By mainthing

32 days ago

Topic Stats

  • 3 posts
  • 3 Pinsiders participating
  • Latest reply 32 days ago by jj44114
  • No one calls this topic a favorite


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#1 32 days ago

I have a Williams Blackout and Black Knight that I wanted to replace the speakers in. I looked at the manual as saw the manual calls for a 6.5 inch 8 ohm speaker. I couldn't find them from the usual pinball parts stores so I found some and replaced them. Sound is clear and better, but both of the old speakers are 4 ohm and identical. I doubt these have been replaced but maybe, do you all think it matters that the new speaker is 8 ohms and not 4? I understand over the years non original parts get substituted, but both old speakers are identical. Or, could Williams have substituted 4 ohm speakers because a supplier ran out? I'm curious what you all think and are the machines okay with the 8 ohm speakers or could I fry the sound board?

#2 32 days ago

I would replace them with whatever you pulled from the game. I would think a 4 ohm speaker would be less stress on an old sound board than 8 ohms.

#3 32 days ago

Depends on how they are wired, in series or parallel. Two 4 ohm speakers wired in series gives 8 ohms at the amp. Two wired in parallel gives two ohms at the amp, which is very low and will put a lot of stress on the amp. I think most games of this era specify 8 ohms at the amp.

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