Members abzurd Posted September 16, 2013 Members Share Posted September 16, 2013 So I have an RCF 310A that has an HF driver distorting periodically. I first noticed it in May at a wedding. I swore then that it was coming through the FOH and other monitors too so I thought it was something else, but I'm guessing I'm wrong because I heard it again last Friday and all other speakers were fine.My guess is that this is this is the speaker where someone jumped during our rendition of "Jump" and dumped water, yes I remember it was water, in the horn. Anyway, it dried and the speaker worked the next week so I went on with my life and it was fine for almost a year. I'm not really even sure it's the same speaker. I switched it with the bass player's monitor at the first break and it was OK for him. He just needs a general monitor though so the SPL was lower. I noticed when I lowered the volume of it when it was distorting for me it wasn't as bad.So the question.... Does this sound like a bad diaphragm? Link to comment Share on other sites More sharing options...
Members agedhorse Posted September 17, 2013 Members Share Posted September 17, 2013 Yes, water with other stuff (including salts and sugars) can seriously damage a diaphragm, corrode the material, etc. Carefully pull apart and look closely. Especially between the phase plug and the dome. Link to comment Share on other sites More sharing options...
Members abzurd Posted September 17, 2013 Author Members Share Posted September 17, 2013 Thanks. So if it's the diaphragm, will I see something? I replaced a mylar diaphragm in a Yorkville NX550P once, but can't remember if I actually saw physical damage to the old one. FWIW, this one appears to be mylar too - ND1411-M I ask because a diaphragm is $50 and a new compression driver is $100. If I take it apart and don't see anything I'll be left with a decision of spending $50, $100, but hopefully not $150. I suppose the first step is taking it apart. Probably a project for next week as the trailer is tucked nicely in the garage with "stuff" packed all around it so I can still fit 2 cars in the garage. I have 2 RCF 522A's just sitting around, which isn't too shabby for a backup Link to comment Share on other sites More sharing options...
Members agedhorse Posted September 22, 2013 Members Share Posted September 22, 2013 Scratches are probably pencil from before assy. Clean everything including gap. Look for damage where vc meets dome. If everything looks good reassemble and test. Link to comment Share on other sites More sharing options...
Members Pro Sound Guy Posted September 22, 2013 Members Share Posted September 22, 2013 Have you done this before? The GAP cleaning is critical Youtube has videos on how to clean the GAP on a loudspeaker. It may look clean but I guarantee there is some poop in there. Link to comment Share on other sites More sharing options...
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