Update for EV Sb120a 12" powered sub's

audiogearjunkie · 23rd July 2010, 08:08 PM

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.

chris661 · 23rd July 2010, 09:29 PM

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!!

audiogearjunkie · 24th July 2010, 01:35 PM

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.

chris661 · 24th July 2010, 02:38 PM

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

lawyerdave · 9th March 2011, 06:17 PM

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

23rd July 2010, 08:08 PM	#1
audiogearjunkie diyAudio Member Join Date: Jul 2010	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.

23rd July 2010, 09:29 PM	#2
chris661 diyAudio Member Join Date: Feb 2008 Location: Lancashire Blog Entries: 7	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!! __________________ "Throwing parts at a failure is like throwing sponges at a rainstorm." - Enzo My setup: http://www.diyaudio.com/forums/multi...tang-band.html

24th July 2010, 02:38 PM	#4
chris661 diyAudio Member Join Date: Feb 2008 Location: Lancashire Blog Entries: 7	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 __________________ "Throwing parts at a failure is like throwing sponges at a rainstorm." - Enzo My setup: http://www.diyaudio.com/forums/multi...tang-band.html

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24th July 2010, 01:35 PM	#3
audiogearjunkie diyAudio Member Join Date: Jul 2010	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.

9th March 2011, 06:17 PM	#5
lawyerdave diyAudio Member Join Date: Mar 2011	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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