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Reload Thread: Hey there needing some helping choosing an amp at a fair price

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    Jmnofear92's Avatar
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    Hey there needing some helping choosing an amp at a fair price

    Hey there,
    I recently purchased two rockford fosgate p3d2-12's and I'm looking for a 0.5ohm stable amp. I have found a Lanzar DCT5001D amp. It's a 5000 watt monoblock amp which is a half ohm stable and says it pushes 5000 watts at half ohm. It has three 40amp fuses which is about 1200watts rms? Which for my subs rms is 600watts a piece with 1200watts max per sub. Is this a good find or too good to be true? Hope you can help only have basic knowledge of install and starting to try to learn more!

    Thanks everyone!,
    Jarred







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    Re: Hey there needing some helping choosing an amp at a fair price

    For the price of that you could just get a good 1200 watt RMS amp. I wouldn't go with any non Opti Lanzar amps personally.




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    Re: Hey there needing some helping choosing an amp at a fair price

    Yes, it is too good to be true and, you cannot judge the output of an amplifier by its fusing. You would be able to if amps were 100% efficient but they are not. All amplifiers use more power than they produce and cheap amps with exaggerated power claims are notoriously inefficient.

    As was said above you'd be better served to buy a quality amplifier with a modest RMS power rating, even if it cost more than the one you're looking at.

    Also, don't bother looking at "peak" or "max" power ratings, even from the highest quality manufacturers. Those numbers are marketing propaganda and they are only there because consumers do not understand how electricity and power work.



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    Re: Hey there needing some helping choosing an amp at a fair price

    So, given your advise; do you know of any half ohm stable recommended amp for a fair price?




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    Re: Hey there needing some helping choosing an amp at a fair price

    There are several, if not dozens.

    Some of the more experienced guys will chime and and give you some solid advice and manufacturer names shortly I'm sure.

    Literally, there are so many options and I only have experience with a couple of them so I don't want to throw out my biased advice.




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    Re: Hey there needing some helping choosing an amp at a fair price

    Budget will be good first off then you need around 1200-1500 rms




    pioneer avhx 5500 dvd, gzpa 1.4000 x 2
    ab vfl 350.4 ,7 pc 2150 and a 150 ah power ware agm ,275 amp singer alt , 2nd one coming soon
    cdt 6.5 es 6 mids,cdt es 010 tweets,es 03 Mids ,mx1000 3 way x overs , sky high and stinger hpm o gauge wires ,also 2 tantric hdd 15's in a 9.5. ^3 ported no wall box 11.5 octo port.
    NOR CAL DB DRAG JUDGE
    http://www.dcsoundlab.com

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    Re: Hey there needing some helping choosing an amp at a fair price

    Looking to spend up to $350




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    Re: Hey there needing some helping choosing an amp at a fair price

    Just run the P3's at 2 ohm. You're going to save yourself a lot of headaches. This would be a great amp: Kicker ZX1500.1 Watch your gains however, that Kicker will definitely blow your RF's if you don't set it right. It's probably capable of around 1800.




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    Re: Hey there needing some helping choosing an amp at a fair price

    I agree with that ^ stable voltages and more efficiency with less stress on your electricals.



    Clip city b1tch, clip clip city b1tch. 10's, 12's, 15's, goin up in flames b1tch.
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    Re: Hey there needing some helping choosing an amp at a fair price

    Stay with a Fosgate amp

    Check out their site to find an adequate amp to power 5-600 WATTS Rms

    stay at 2 ohm


    Easier on your electrical system




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    Re: Hey there needing some helping choosing an amp at a fair price

    How about this amp?

    ITEM DESCRIPTION:
    OPTI2000D Optidrive 2000W Half Ohm Stable Mono Block Digital Competition Amp
    OPTI2000D


    Lanzar OPTI2000D Optidrive 2000 Watt Half Ohm Stable Mono Block Digital Competition Class Amplifier

    700 Watts RMS Power @ 4 Ohms
    1100 Watts RMS Power @ 2 Ohms
    1600 Watts RMS Power @ 1.3 Ohms
    2000 Watts Max Power @ 0.5 Ohms
    4000 Watts Bridge Max Power @ 2 Ohms
    Mono Block Subwoofer Amplifier
    0.5 Ohm Stable
    MOSFET Power Supply
    PWM (Pulse-Width-Modulated) System
    Double Sided Epoxy PCB Circuit Board
    Gold Plated RCA Inputs
    Custom Terminal Block for Speaker Connections
    Thermal, Overload Short Protection
    Remote Bass Control
    Soft Turn On/Off
    THD @ 1Watt/4 Ohm: 0.1%
    S/N Ratio: 90dB
    Frequency Response: 15Hz - 150Hz (+/-3dB)
    Damping Factor @ 20Hz/4 Ohms: 400
    Low Pass Filter: 50Hz-150Hz, 24dB/Octave
    Variable Subsonic Filter: 15Hz-40Hz, 24dB/Octave
    Variable Bass Boost: 0 to 18dB
    Variable Phase Control: 0 to 180
    Input Sensitivity: 200mV ~ 8V
    Input Impedance: 10k Ohm
    Line Output Impedance: 100 Ohm
    Fuse Rating: 30A x 6
    Dimensions: 10.08'' (W) x 2.12'' (H) x 19.1'' (L)
    [[UPC]]




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    Re: Hey there needing some helping choosing an amp at a fair price

    Quote Originally Posted by Jmnofear92 View Post
    How about this amp?

    ITEM DESCRIPTION:
    OPTI2000D Optidrive 2000W Half Ohm Stable Mono Block Digital Competition Amp
    OPTI2000D


    Lanzar OPTI2000D Optidrive 2000 Watt Half Ohm Stable Mono Block Digital Competition Class Amplifier

    700 Watts RMS Power @ 4 Ohms
    1100 Watts RMS Power @ 2 Ohms
    1600 Watts RMS Power @ 1.3 Ohms
    2000 Watts Max Power @ 0.5 Ohms
    4000 Watts Bridge Max Power @ 2 Ohms
    Mono Block Subwoofer Amplifier
    0.5 Ohm Stable
    MOSFET Power Supply
    PWM (Pulse-Width-Modulated) System
    Double Sided Epoxy PCB Circuit Board
    Gold Plated RCA Inputs
    Custom Terminal Block for Speaker Connections
    Thermal, Overload Short Protection
    Remote Bass Control
    Soft Turn On/Off
    THD @ 1Watt/4 Ohm: 0.1%
    S/N Ratio: 90dB
    Frequency Response: 15Hz - 150Hz (+/-3dB)
    Damping Factor @ 20Hz/4 Ohms: 400
    Low Pass Filter: 50Hz-150Hz, 24dB/Octave
    Variable Subsonic Filter: 15Hz-40Hz, 24dB/Octave
    Variable Bass Boost: 0 to 18dB
    Variable Phase Control: 0 to 180
    Input Sensitivity: 200mV ~ 8V
    Input Impedance: 10k Ohm
    Line Output Impedance: 100 Ohm
    Fuse Rating: 30A x 6
    Dimensions: 10.08'' (W) x 2.12'' (H) x 19.1'' (L)
    [[UPC]]
    decent amp, but I have a alpine mrp 2000 for 325 shipped




    pioneer avhx 5500 dvd, gzpa 1.4000 x 2
    ab vfl 350.4 ,7 pc 2150 and a 150 ah power ware agm ,275 amp singer alt , 2nd one coming soon
    cdt 6.5 es 6 mids,cdt es 010 tweets,es 03 Mids ,mx1000 3 way x overs , sky high and stinger hpm o gauge wires ,also 2 tantric hdd 15's in a 9.5. ^3 ported no wall box 11.5 octo port.
    NOR CAL DB DRAG JUDGE
    http://www.dcsoundlab.com

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    Re: Hey there needing some helping choosing an amp at a fair price

    Quote Originally Posted by Jmnofear92 View Post
    So, given your advise; do you know of any half ohm stable recommended amp for a fair price?

    For sure I do. The CT Sounds line up will take a .5Ω load but as has been said, you'd be far better off with an amp that does what you need at 2Ω in a daily setup... unless you're prepared to spend a good chunk of money on electrical upgrades.

    When you drop to .5Ω efficiency decreases a lot and what that means is that the amp requires significantly more current just to produce the same amount of power. So if you buy a .5Ω stable amp and don't up your electrical, you'll be buying new subs and/or amps sooner than later, because an amp that's starved for voltage will try to pull more current and that will lead to clipping and other stresses on the amp's power supply.

    In the end, it's best to buy a quality amp that will do what you need at or above 1Ω. It may cost a bit more in the short run but it'll cost a lot less in the long run.

    But to answer your question directly... the 900.1 will do what you need at 1Ω and more than you need at a half. The 1400.1 will do what you need at 2Ω and it will blow your subs to smithereens at a half. The 900.1 is priced comparably to the amp you posted and I'd pay double for it before I'd buy the amp you posted. ;-)



    Owner, Audio Anarchy, LLC
    2915 Youree Drive, Shreveport, LA
    318-780-6149

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    Re: Hey there needing some helping choosing an amp at a fair price

    Well my plan is to upgrade "the big three" run an external dry cell battery for the amp so that the amp will not starve for power it would be getting all the power from it's own cell. Running a bigger alternator as well to replenish the power back to the batteries. So, am I half way there for electrical upgrades?




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    Re: Hey there needing some helping choosing an amp at a fair price

    Quote Originally Posted by Jmnofear92 View Post
    Well my plan is to upgrade "the big three" run an external dry cell battery for the amp so that the amp will not starve for power it would be getting all the power from it's own cell. Running a bigger alternator as well to replenish the power back to the batteries. So, am I half way there for electrical upgrades?
    That could be good enough, depending on the amp, the wire, the batteries and the alternator but the amp won't be getting all of its power from the second battery. The alternator and front battey are a part of the equation as well. In fact, the alternator needs to be able to be the primary supply of power to the amp while the vehicle is running. The batteries are just there for additional current when needed.



    Owner, Audio Anarchy, LLC
    2915 Youree Drive, Shreveport, LA
    318-780-6149

    Authorized Dealer in NW Louisiana for CT Sounds & Execution Audio. We also carry other products but you really don't want that stuff... ;-)


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