Arcade Collecting > Restorations & repair
1975 Atari Crash 'N Score Restoration
Level42:
Car speakers are not shielded and since they're pretty close to the screen on this cab I wouldn't use them, or at least check if there's any influence on the screen.
About the Ohms value: If you succeed in blowing that amp up because of the wrong impedance, you probably blew up your ears first. You will not be turning up the sound that high, especially not with the simple notorious sounds those oldies produce.
Majoraslayer:
The speakers are down next to the coin box; I would think that would put plenty of space away from the monitor. That volume control on the monitor doesn't actually do anything. These speakers don't look shielded at all, but I could be wrong. The sound seems to be turned all the way up at the moment as well.
ChadTower:
--- Quote from: Level42 on August 31, 2009, 01:58:13 am ---Car speakers are not shielded and since they're pretty close to the screen on this cab I wouldn't use them, or at least check if there's any influence on the screen.
--- End quote ---
Pfft, if it waves the picture, just put a piece of metal between them.
RayB:
5w 8 ohms
Stick to that.
Level42:
Sigh.....
The facts:
Check out the Crash-n-score manual:
The Crash-n-score PCB uses two LM380 sound amps, so each speaker has one LM380.
Check out the LM380 datasheet:
Repsonse charts are given for 4, 8 and 16 Ohms impedance speakers, so YES the LM380 WILL drive any of those.
People are confusing a 4 and an 8 Ohms impedance speaker like being it a 120VAC or 230 VAC mains difference, which it is not.
Yes, you do load the amp more with a lower impedance speaker but that doesn't mean it will blow it up.
Yes it will blow up if you run it on way too loud volume (which is clearly indicated by the sound getting distorted) for continuous time, but that's true for 4,8 and 16 Ohms impedance.
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