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power acoustik ts-1920-2 amplifier


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rgv92 
Member - Posts: 8
Member spacespace
Joined: December 16, 2009
Location: Florida, United States
Posted: December 16, 2009 at 4:41 PM / IP Logged  
i ordered a Power Acoustik TS-1920-2 which pushes 440 x 2 RMS @ 2ohms per channel. Will this amp be able to push into a 1.34 ohm load per channel without any issues ? The amp states that it is 2 ohm stable in stereo, but i was wondering if i would run into any problems if i ran it into said load.
j.reed 
Copper - Posts: 716
Copper spacespace
Joined: January 05, 2009
Location: Arkansas, United States
Posted: December 16, 2009 at 4:47 PM / IP Logged  
Manufacturers put there lowest stable rating for a reason. To protect there amps. PA amps are very low quality. If it does work at the load it will not work for long.
power acoustik ts-1920-2 amplifier -- posted image.
rgv92 
Member - Posts: 8
Member spacespace
Joined: December 16, 2009
Location: Florida, United States
Posted: December 16, 2009 at 4:50 PM / IP Logged  
alright thanks. well can you suggest a way to wire 3 MA audio 12"'s 4 Ohm dvc to get maximum output ?
j.reed 
Copper - Posts: 716
Copper spacespace
Joined: January 05, 2009
Location: Arkansas, United States
Posted: December 16, 2009 at 5:01 PM / IP Logged  
If you want the best ouput possible. Run on that amp run just 2 of the subs in series/parallel. That will give you a 2ohm load and full power out of the amp to the 2. Or you could use series parralel to all 3 but that will be a 3ohm load. You will not see full power nor a difference in output to the ear.
power acoustik ts-1920-2 amplifier -- posted image.
rgv92 
Member - Posts: 8
Member spacespace
Joined: December 16, 2009
Location: Florida, United States
Posted: December 16, 2009 at 5:08 PM / IP Logged  
That would be the way to go, if my amp was 2 ohm stable bridged. it is only 2 ohm stable, per channel in stereo mode. minimum impedance for bridged mode is 4 ohms. also, my subs are 300 rms/600max each. I Had 4 of them at one point, but some idiot put a bag on top of my box and blew a hole in the cone. would i see better results if i were to purchase a replacement, and run 4 12"s?
i am an idiot 
Platinum - Posts: 13,674
Platinum spaceThis member consistently provides reliable informationspace
Joined: September 21, 2006
Location: Louisiana, United States
Posted: December 16, 2009 at 5:15 PM / IP Logged  
Did I do that?
j.reed 
Copper - Posts: 716
Copper spacespace
Joined: January 05, 2009
Location: Arkansas, United States
Posted: December 16, 2009 at 5:18 PM / IP Logged  
rgv92 wrote:
That would be the way to go, if my amp was 2 ohm stable bridged. it is only 2 ohm stable, per channel in stereo mode. minimum impedance for bridged mode is 4 ohms. also, my subs are 300 rms/600max each. I Had 4 of them at one point, but some idiot put a bag on top of my box and blew a hole in the cone. would i see better results if i were to purchase a replacement, and run 4 12"s?
Yeah i forgot you are using a stereo amp. Series/parallel although would give you a 2ohm load would only utilize on channel, Not so good. That would only give you half the power from your amp. With 2 subs you would want to wire each sub in series giving you a 4ohm load per channel or Bridged you would have to run series/series giving you a 8ohm bridge load, Same power. Getting a 4th sub would infact be best. You would be able to present a 4ohm bridge and extract full power from the amp.
power acoustik ts-1920-2 amplifier -- posted image.
rgv92 
Member - Posts: 8
Member spacespace
Joined: December 16, 2009
Location: Florida, United States
Posted: December 16, 2009 at 5:22 PM / IP Logged  
thats what i figured...now one more question, i am considering building a new box for 4 MA audio MA121XQ
specs as follows: Size: 12 Inches
Power Handling Capabilities:
600 Watts Power Handling
300 Watts RMS Power Handling
High Profile Triple Treated Surround
Black Powder Coated Stamped Steel Basket
Copper Wound Black Anodized Aluminum Voice Coils
Dual Laminated Cotton Spider
Rubber Sealant Gasket
Vented Bumped Back Plate
60 Oz. Strontium Magnet
Platinum Plated Block Terminals
Sensitivity: 88.36dB
Impedance: 4 Ohm Dual Voice Coil
Mounting Depth: 5.5"
Mounting Diameter: 11.75"
Optimum Vented Box: 3.0 Cu/Ft
Optimum Sealed Box: 1.0 - 1.5 Cu/Ft
What would be the best size box for this set up, tuned to 36 hz?
i have a sealed box for 4 12"s, which is 4 cubes.
j.reed 
Copper - Posts: 716
Copper spacespace
Joined: January 05, 2009
Location: Arkansas, United States
Posted: December 16, 2009 at 5:29 PM / IP Logged  
What i found was
-Ported 1.75cu.ft. 14sq.in. port area per sub.
-Sealed is .5 - 1cu.ft. per sub
The MA site is down right now. I would shoot them an email and see what they recommend.
power acoustik ts-1920-2 amplifier -- posted image.
i am an idiot 
Platinum - Posts: 13,674
Platinum spaceThis member consistently provides reliable informationspace
Joined: September 21, 2006
Location: Louisiana, United States
Posted: December 16, 2009 at 5:36 PM / IP Logged  
His woofers are dual 4 0hm.
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