Update for EV Sb120a 12" powered sub's - diyAudio
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Old 23rd July 2010, 09:08 PM   #1
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Default Update for EV Sb120a 12" powered sub's

I have four old Sb120a's in great condition. The problem is that their performance really sucks as a whole. The new Sb122's rock, but I have these old ones and I'd like to build new boxes for them and move the speakers and amps into something that will let them perform.
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Old 23rd July 2010, 10:29 PM   #2
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Hmmm...

Could be a few things causing the lack of performance. The cabinet could be leaking, causing reduced output. The drivers could be knackered, or the amplifiers could be knackered.
Need to find out what's holding them back, because those specs are impressive. 120dB@50Hz-120Hz... EACH!!
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Old 24th July 2010, 02:35 PM   #3
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The spec's look good, but they are poor performers in the real world. Every
thing about the boxes is 100% working. I want to upgrade the sound and performance by building new cabinets. The plastic boxes don't have a smooth tone and are kind of thumpy around 100hz, no nice low end like the new Sb122's.
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Old 24th July 2010, 03:38 PM   #4
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In that case, I'd keep the internal volume and port tuning the same, but make sure the cabinet is braced properly etc. Also, replacing the (probably dried up) electrolytic caps on the PSU might help things.

Chris
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Old 9th March 2011, 07:17 PM   #5
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I am looking for a 120 or 121 cabinet. Do you still have the ev ab120's. If so I would like to buy just the cabinet
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