mc300baud
Well-known member
i have a Sega Naomi Ninja Assault that seems to have a bad amplifier (lots of buzz, hum and noise.) it looks like it's the guts from a dedicated cabinet transplanted into an MKII, so the audio amp board is different from any other Naomi board i can find on-line. for those that may not have seen one, Naomi main boards output a line-level signal (RCA connectors, even) but don't have internal amplifiers to drive speakers of their own.
the game is on-location and making money. the location owner doesn't want the game to be down or the audio off; he'd rather have the messed up audio than none, so i don't have the time to spend to try to repair the current amp board, and the few i've seen for sale working aren't cheap.
i saw this amplifier on Parts Express and was wondering if it might work to replace the bad amp in my game:
http://www.parts-express.com/pe/showdetl.cfm?Partnumber=265-079
i should be able to pull 12-volts DC off of the PS and the speaker in the cabinet is 25 watt 8 ohm (or 35 watt 4 ohm if i decide to switch to a 6X9 car speaker.) anyone else tried this or see any reason why it wouldn't work?
the game is on-location and making money. the location owner doesn't want the game to be down or the audio off; he'd rather have the messed up audio than none, so i don't have the time to spend to try to repair the current amp board, and the few i've seen for sale working aren't cheap.
i saw this amplifier on Parts Express and was wondering if it might work to replace the bad amp in my game:
http://www.parts-express.com/pe/showdetl.cfm?Partnumber=265-079
i should be able to pull 12-volts DC off of the PS and the speaker in the cabinet is 25 watt 8 ohm (or 35 watt 4 ohm if i decide to switch to a 6X9 car speaker.) anyone else tried this or see any reason why it wouldn't work?