AlmostGod Posted July 12, 2021 Author Share Posted July 12, 2021 I believe my set is covered in a layer of fiberglass, is this something anyone has heard of before? Thinking it's going to be difficult if possible to remove the pain without destroying the fiber glass... Best to leave it or paint over it at most? Quote Link to comment Share on other sites More sharing options...
mark1101 Posted July 12, 2021 Share Posted July 12, 2021 My 4 MWM-S Cabinets are fiberglass with the aluminum edge banding. Hard to find the singles like this any longer. 1 Quote Link to comment Share on other sites More sharing options...
AlmostGod Posted July 13, 2021 Author Share Posted July 13, 2021 On 7/12/2021 at 2:57 PM, mark1101 said: My 4 MWM-S Cabinets are fiberglass with the aluminum edge banding. Hard to find the singles like this any longer. Yeah I have those as well, my corners also look different, thinking they're not aluminum, but something more rigid? Quote Link to comment Share on other sites More sharing options...
Dave A Posted July 13, 2021 Share Posted July 13, 2021 On 7/12/2021 at 7:20 AM, AlmostGod said: I believe my set is covered in a layer of fiberglass, is this something anyone has heard of before? Thinking it's going to be difficult if possible to remove the pain without destroying the fiber glass... Best to leave it or paint over it at most? LEAVE IT! besides being really hard to damage they will help kill any resonance. Not as pretty as birch veneer but I would prefer the fiberglass. 1 Quote Link to comment Share on other sites More sharing options...
Moderators dtel Posted July 13, 2021 Moderators Share Posted July 13, 2021 44 minutes ago, Dave A said: LEAVE IT! besides being really hard to damage they will help kill any resonance. Not as pretty as birch veneer but I would prefer the fiberglass. Yes the fiberglass is good and very tough. 2 Quote Link to comment Share on other sites More sharing options...
ClaudeJ1 Posted July 13, 2021 Share Posted July 13, 2021 On 7/12/2021 at 8:57 AM, mark1101 said: My 4 MWM-S Cabinets are fiberglass with the aluminum edge banding. Hard to find the singles like this any longer. This is why Bandsaws were invented. Make your own. Lots of MWM Double Bins around for pennies on the dollar. 1 Quote Link to comment Share on other sites More sharing options...
Marvel Posted July 14, 2021 Share Posted July 14, 2021 5 hours ago, AlmostGod said: Yeah I have those as well, my corners also look different, thinking they're not aluminum, but something more rigid? The corner pieces on the Pro Heresy with aluminum trim are cast pieces. I've not seen the MCM cabs with aluminum up close. Quote Link to comment Share on other sites More sharing options...
AlmostGod Posted July 16, 2021 Author Share Posted July 16, 2021 Hi everyone, does it matter how I connect those four drivers to the horn? I saw two of them were connected parallel. Does it matter which ones? Also, why are two of them connected parralel Quote Link to comment Share on other sites More sharing options...
Dave A Posted July 16, 2021 Share Posted July 16, 2021 6 hours ago, AlmostGod said: Hi everyone, does it matter how I connect those four drivers to the horn? I saw two of them were connected parallel. Does it matter which ones? Also, why are two of them connected parralel As a general rule of thumb you take pictures of the original wiring before you take them apart and do one set at a time so you always have a reference to look back to. I do both with crossovers and it saves grief. https://wgsusa.com/how-properly-wire-4x12-speaker-cabinethttps://wgsusa.com/how-properly-wire-4x12-speaker-cabinet might help you out. Quote Link to comment Share on other sites More sharing options...
OO1 Posted July 17, 2021 Share Posted July 17, 2021 On 7/10/2021 at 2:52 PM, kg4guy said: what's the speaker in the middle ? 1 Quote Link to comment Share on other sites More sharing options...
kg4guy Posted July 17, 2021 Share Posted July 17, 2021 It's a Speakerlab bass bin with Klipschorn HF section with AK3 networks I built a back around them like the TSCM so they wouldn't be dependent on walls they sound amazing > 1 Quote Link to comment Share on other sites More sharing options...
Marvel Posted July 18, 2021 Share Posted July 18, 2021 On 7/16/2021 at 9:42 AM, AlmostGod said: Hi everyone, does it matter how I connect those four drivers to the horn? I saw two of them were connected parallel. Does it matter which ones? Also, why are two of them connected parralel If the crossover is expecting a 16 ohm driver to be connected, you can connect four 16 ohm drivers together to provide a 16 ohm load. Two 16 ohm drivers in parallel gives an 8 ohm load... putting another parallel pair in series will get you back to a 16 ohm load. This way the crossover point stays the same but you have higher output. And it doesn't matter really matter which ones, as long as the end result works out. Just make sure the polarity is correct so the diaphragms all move the same direction with an applied voltage/signal. 2 Quote Link to comment Share on other sites More sharing options...
AlmostGod Posted July 26, 2021 Author Share Posted July 26, 2021 I'm having a hard time thoroughly cleaning that fiberglass, dirt stays in there, I'd really love to pressure wash them but I'm not going to take them down 2 floors to clean. Anyone got any tips? Quote Link to comment Share on other sites More sharing options...
Chris A Posted July 26, 2021 Share Posted July 26, 2021 1 hour ago, AlmostGod said: I'm having a hard time thoroughly cleaning that fiberglass, dirt stays in there, I'd really love to pressure wash them but I'm not going to take them down 2 floors to clean. Anyone got any tips? Acetone has 1/3 the viscosity of water at room temperature, therefore the Reynolds numbers for similar impingement velocities are 3x higher than water. Open all the windows first, then use a respirator to avoid breathing acetone vapors. (It's the Reynolds numbers attained on the surfaces you're cleaning which do the cleaning action...and acetone is used a lot in fiberglass work to clean stray resin off working surfaces when laying up.) You can also use compressed air for everything that doesn't require wetting action to clean. I'd use compressed air first to knock off anything that's not adhered to the fiberglass surfaces, then acetone for the remainder. Chris Quote Link to comment Share on other sites More sharing options...
Dave A Posted July 26, 2021 Share Posted July 26, 2021 3 hours ago, Chris A said: Acetone has 1/3 the viscosity of water at room temperature, therefore the Reynolds numbers for similar impingement velocities are 3x higher than water. Open all the windows first, then use a respirator to avoid breathing acetone vapors. (It's the Reynolds numbers attained on the surfaces you're cleaning which do the cleaning action...and acetone is used a lot in fiberglass work to clean stray resin off working surfaces when laying up.) You can also use compressed air for everything that doesn't require wetting action to clean. I'd use compressed air first to knock off anything that's not adhered to the fiberglass surfaces, then acetone for the remainder. Chris That will work and take them down to bare fiberglass. repainting is easy but you are going to regret not taking care of cosmetics before sitting them up two flights of steps. Is there some reason you can't just buff with scotchbrite pads and paint over what is there? Quote Link to comment Share on other sites More sharing options...
mark1101 Posted July 26, 2021 Share Posted July 26, 2021 I took my bass bins out in the driveway stood them up and pressure washed them. Brushed the heavy deposits. There are pics of me doing that somewhere on this forum. Quote Link to comment Share on other sites More sharing options...
AlmostGod Posted July 27, 2021 Author Share Posted July 27, 2021 14 hours ago, Dave A said: That will work and take them down to bare fiberglass. repainting is easy but you are going to regret not taking care of cosmetics before sitting them up two flights of steps. Is there some reason you can't just buff with scotchbrite pads and paint over what is there? They are already upstairs. I have an appartement and I'm not allowed to keep them in the public places. I'll use acetone on them I think! Quote Link to comment Share on other sites More sharing options...
Dave A Posted July 27, 2021 Share Posted July 27, 2021 25 minutes ago, AlmostGod said: They are already upstairs. I have an appartement and I'm not allowed to keep them in the public places. I'll use acetone on them I think! Acetone + room + vapors = boom. 2 Quote Link to comment Share on other sites More sharing options...
GeorgeK Posted July 27, 2021 Share Posted July 27, 2021 Acetone is very bad for kidneys if you get it on your skin. Quote Link to comment Share on other sites More sharing options...
AlmostGod Posted July 28, 2021 Author Share Posted July 28, 2021 18 hours ago, Dave A said: Acetone + room + vapors = boom. Yeah I'll get some fans and open up the windows, that'll work? Quote Link to comment Share on other sites More sharing options...
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