I am not sure where you got your information about a US Amp 2000x producing 4200-4400 watts. But I can say with all certainty that this amp will not make any more, than 3000 watts WHEN it blows up!!!
Above is the link to the Motorola data sheet on the output devices found in that amp. In this amp there are 12 MJE4343's and 12 MJE4353's which are complimentary divices. On the Data sheet you will see a spec labeled "Total Power Dissipation" This is the maximum amount of heat, represented in watts that the device can get rid of before a failure occurs. Each device can dissapate 125 watts and with 24 devices you get 3000 watts.
Not to mention that the devices in this amp are geared to run at high voltage, up to 160v. When you lower the ohm load below 4 ohm bridged you are now asking the amp to act as a high current amp. The devices in the amp were not speced to do this and WILL blow and when they do they usually take the circuit board with them. Costing the customer, at least a major repair, but possibly his entire amp, due to a ruined board.
If you choose to run a product in a manner other than specified by it's manufacturer, just remember it may cost you more than you think.
I have also seen many of these "MOD'ed" 2000x's and all I have seen done is the protection bypassed. Or at worst nothing done, with the customer paying for it. This type of mod does not make the amp more power full, it just bypasses any safeties built in. In my opinion this is not smart. If you want a larger amp. BUY IT. and use it correctly.
Tired of the exaduration!
-------------------- Thunder. aka: "Jimmy Walker" TIPS Inc. (601-932-8477) Independant Enclosure Fabricator Old School...Since '86. Because Size Does MATTER! "Experience is something that you aquire, Right after you need it..." Posts: 538 | From: Pearl, MS | Registered: May 1999
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I am not sure where you got your information about a US Amp 2000x producing 4200-4400 watts. But I can say with all certainty that this amp will not make any more, than 3000 watts WHEN it blows up!!!
Above is the link to the Motorola data sheet on the output devices found in that amp. In this amp there are 12 MJE4343's and 12 MJE4353's which are complimentary divices. On the Data sheet you will see a spec labeled "Total Power Dissipation" This is the maximum amount of heat, represented in watts that the device can get rid of before a failure occurs. Each device can dissapate 125 watts and with 24 devices you get 3000 watts.
Not to mention that the devices in this amp are geared to run at high voltage, up to 160v. When you lower the ohm load below 4 ohm bridged you are now asking the amp to act as a high current amp. The devices in the amp were not speced to do this and WILL blow and when they do they usually take the circuit board with them. Costing the customer, at least a major repair, but possibly his entire amp, due to a ruined board.
If you choose to run a product in a manner other than specified by it's manufacturer, just remember it may cost you more than you think.
I have also seen many of these "MOD'ed" 2000x's and all I have seen done is the protection bypassed. Or at worst nothing done, with the customer paying for it. This type of mod does not make the amp more power full, it just bypasses any safeties built in. In my opinion this is not smart. If you want a larger amp. BUY IT. and use it correctly.
Tired of the exaduration!
My 2000x putout 121v@4ohm. It ran stable @2ohm, I never tried 10hm. Due to the high cost of repais for USAmps, I don't think I would take my chance unless you are able to afford the costs of repairs if it blows. I had 6 of them and they all putout over 3600watts! The are extremely powerful amps if you can keep feeding them the juice to put it out.
-------------------- :::JMANN::: MY GARAGE! Cerwin-Vega! ~ HiFonics~ Pioneer ~ Alpine Posts: 2850 | From: South Euclid, Ohio (just outside of Cleveland) | Registered: Apr 2001
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posted
well we get 70 v ac @ 1 ohm for comp i would not do this for daily driving.
-------------------- AUDIO X TEAM KINETIK TEAM MAXXSONICS TEAM OHIO GENERATOR T3 AUDIO TEAM BUDWIESER Posts: 3655 | From: Florence, al | Registered: Oct 1999
| IP: Logged |
I am not sure where you got your information about a US Amp 2000x producing 4200-4400 watts. But I can say with all certainty that this amp will not make any more, than 3000 watts WHEN it blows up!!!
Above is the link to the Motorola data sheet on the output devices found in that amp. In this amp there are 12 MJE4343's and 12 MJE4353's which are complimentary divices. On the Data sheet you will see a spec labeled "Total Power Dissipation" This is the maximum amount of heat, represented in watts that the device can get rid of before a failure occurs. Each device can dissapate 125 watts and with 24 devices you get 3000 watts.
Not to mention that the devices in this amp are geared to run at high voltage, up to 160v. When you lower the ohm load below 4 ohm bridged you are now asking the amp to act as a high current amp. The devices in the amp were not speced to do this and WILL blow and when they do they usually take the circuit board with them. Costing the customer, at least a major repair, but possibly his entire amp, due to a ruined board.
If you choose to run a product in a manner other than specified by it's manufacturer, just remember it may cost you more than you think.
I have also seen many of these "MOD'ed" 2000x's and all I have seen done is the protection bypassed. Or at worst nothing done, with the customer paying for it. This type of mod does not make the amp more power full, it just bypasses any safeties built in. In my opinion this is not smart. If you want a larger amp. BUY IT. and use it correctly.
Tired of the exaduration!
i hate to bust your bubble but yes removing the protection does make the amp put out more power by alowing it to run at a lower ohm load. i have tested these amps first hand and have got 4200 whats on a 12volt setup,gorman was running them on a 16 volt setup and was getting a tad over 4400 watts...the list is endless to the number of people getting 4000+ watts out of there modded 2000X's you can get 130+ ac volts output and they will draw nearly 400amps of current and draw 33 amps of current on the speaker wires while a repair on the 2000X is very high as long as your setup and ohmload is right you can run them for years with no problems...
-------------------- glenn smeby TEAM KRYPTONITE TEAM THUNDERFORCE-2003 Posts: 1655 | From: panama city ,fla. | Registered: Jul 2001
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posted
The statement about the output devices having a total power disipation rating of 3000W is a good way to look at it but it overlooks some details. First the devices only have to disipate the power that is not delivered to the load i.e. the waste. For a heavily clipped output waveform this can approach 0 as it does in D class amps. Lets say the output stage is 75% eff. (max theoretical for AB amp playing sine wave) at 3000W output the devices must dissipate (3000/.75)-3000 = 1000W. At 4400W the disipation is ~1500W. This is still not the whole story. The 125W spec is only true if the device is at room temp. If you read further in the spec sheet you will see a power derating spec in watts per C. This means that as soon as you start playing the amp asking the devices to dispate 60+ watts each and they heat up you may well be exceeding the rated power. If the amp is only used for short bursts then allowed to cool fully it should be fine at these power levels. Remember though, if you lose one output device at that output level they will all go very quickly and those transistors are at least $7 a piece.
posted
stell not found what i need to know .. i am runing a biger alt. and 2 bats. i have had outher us amps and ran them at 1/2 ohm but thoughs did not have the sat thoughts where 2 ohm amps .. all i need to know is of this amp will run for a few sec. for burps no more then that ..or will it shut off .. i need to know some thing soon ill have my subs back this week .. think you if you can tall me any thing
posted
the 2000x will not burp at 1ohm with the SAT in place. it will try, but the output will stop before it really gets started and the SAT light comes on. it will burp at 1ohm if the SAT is bypassed. i have been there, done that. (12vdc battery setup) i hope this answers your question.
-------------------- Team Livewire Posts: 2199 | From: columbus, ohio | Registered: Mar 2001
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