Question about Pioneer PRS-X720 Car Audio Amplifier

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Prsx720 okay thanks for the help one more question as i said i have 2 prsx720 its 1-8 ohm load imp. continuous power100x2/4ohm bridged 400x1 . can i bridge the amp and put 2 dvc subs on each amp ? before i sold my other speakers i had 4 fosgate 10 high exurcions on one amp they slamed amp never got hot or anything no problems thank you

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The specs I read on the Pioneer site say the amp is not 1 ohm stable, so keep that in mind.

It partially depends on the impedance of each voice coil on the DVC subs. If they are dual 4 ohm, and you connect the DVCs in parallel ("+"s together, "-"s together), you could run a sub on each channel of the amp(s). This would put about 200W on each sub.

The other option is to still tie the dual 4 ohm voice coils in parallel, tie 2 subs in series (one "+" to the other "-"), and bridge the two channels of the amp (aka put them in parallel). But this, also, would be about 200W on each sub.

Things get different if the subs have dual 2 ohm, 3 ohm, or 8 ohm voice coils.

Posted on Mar 16, 2008

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I have a plad213 what load impendance am i running it i hook up 2 4ohm speakers in series bridged on that amp and how many watts RMS am i getting per speaker


2 4 ohm speakers wired in series is 8 ohms and then is dropped back down to 4 ohms when you bridge it.

2 4 ohm speakers wired in parallel is 2 ohms then dropped down to 1 ohm when bridged
(most amplifiers will not handle loads below 2 ohms)

hope this info helps

May 20, 2011 | Pyle Dryver PLAD213 Car Audio Amplifier

2 Answers

ON MY Pioneer PRS-X720 Car Audio Amplifier WHEN I TRY TO HOOK UP THE BRIDGE LITTLE SOUNDS COMES OUT THE SPEAKERS I HAVE TWO 12S MTX THUNDER IN THEY ARE IN A 2OHMS BOX BUT WHEN I HOOK UP JUST ONE CHANNEL...


From the specs this amp can only handle 4ohms when bridged but can handle 2ohms when it's not bridged

Specifications
  • Continuous Power (20Hz-20kHz, 0.04% THD)
    • 2 ch: (4 Ohm) 100Wx2
    • 2 ch: (2 Ohm) 200Wx2
    • 1 ch: (4 Ohm) 400Wx1
  • Maximum Power (EIAJ)
    • 2 ch: (4 Ohm) 250Wx2
    • 1 ch: (4 Ohm) 750Wx1
  • Frequency Response: 10Hz - 50kHz (0,-1dB)
  • Total Harmonic Distortion: <0.01% (1kHz, 4 Ohm)
  • Signal-to-Noise Ratio: >105dB (IHF-A Weighted, at 1kHz)
  • Dimensions: 10-3/8" x 2-1/2" x 13-5/8"
Hope that helps.

Nov 08, 2010 | Pioneer PRS-X720 Car Audio Amplifier

1 Answer

Amp comes on running 2 12" 450 watt pioneer subs, volume only seems to be about half output, with speakers bridged


This could be the reason. If you look at the specs for this amp you will see that the continuous power out is rated for 380W bridged. The speakers rated at 450W should be able to handle close to 315W continuous. Now if you split these numbers being you have bridged these speakers, you drive each one up to about 190W continuous. The speakers are being driven approximately by 60% of the rated capability. I personally like to keep it right where you got it, not exceeding 80% of the speakers rated capacity.

Here are the specs for the AMP:
  • Specifications
  • Peak Music Power 760 Watts
  • Number of Channels 2
  • Load Impedance Capability 2~8 Ohm (Stereo), 4~8 Ohm (Bridged)
  • Continuous Power (4 ohm) 125W x 2
  • Continuous Power (2 ohm) 190W x 2
  • Continuous Power Bridged (4 ohm) 380W x 1
  • Frequency Response 10Hz ~ 50kHz
  • Total Harmonic Distortion 0.008%
  • Signal-to-Noise Ratio 100dB
  • Dimensions 12" x 2-3/8" x 12-3/4"
  • Features
  • Bridgeable
  • Channel # Capability 1/2/3
  • PWM Regulated MOSFET Power Supply
  • Screw-Type Speaker Terminals
  • Balanced Isolator Input Circuit
  • RCA Inputs 2 Channel
  • Input Level Control Hi-Volt (200mV ~ 6.5v)
  • Built-in Crossover Selectable LPF (80Hz, -12dB/Oct.)
  • Aug 06, 2010 | Pioneer GM-5000T Car Audio Amplifier

    1 Answer

    Wattage


    I have the following specs for you
    Basically 150watts per channel using two channels , or 75watts using all four
    Here goes:

    • 4 Channel Mosfet Amplifier
    • Advanced Overload and Thermal Protection
    • Metal Film Capacitors/Resistors In Signal Path
    • Frequency Response +/-1dB, 20Hz to 20 kHZ
    • Signal to Noise Ratio (A-weighted) >100dB
    • Max Continuous Bridged Power @ 1% THD 150 watts x 2 into 4 ohms @ 14.4 Vdc
    • Max Continuous Power per Channel @ 1% THD 75 watts x 4 into 2 ohms @ 14.4 Vdc
    • Nominal Continuous Power per Channel @ 1 % THD 35 Watts x 4 into 4 ohms @ 14.4 Vdc
    • IASCA/USAC Power Rating 12 Watts x 4 into 4 ohms @ 12.5 Vdc
    • Minimum Load when Bridged 2 Ohms
    • Minimum Load per Channel 1 Ohm
    • Input Signal Voltage Range 0.1 volts to 2 volts
    • Crossover Type Resisitor Network, Linkwitz Riley,
    • Highpass/Lowpass
    • Crossover Slope 24 dB per octave
    • Crossover Frequency Range 20-550Hz
    • Factory Crossover Setting 85 Hz
    • Auxilary Output Channels 2
    • Auxilary Output Frequency Range Highpass or Lowpass, Opposite of Speaker Output
    • Bass Boost 0- to +18dB @ 45 hZ
    • Power Supply Voltage 10Vdc to 15.5Vdc
    • Recommended Fuse 40 amp
    Dimensions 12.25L x 9.25W x 2.10H

    May 23, 2010 | Car Amplifiers

    1 Answer

    I need to know what the wattage the alpine mrv-f407 puts out when its bridged or only running 2 channels?


    RMS Continuous Power (at 12.0V)
    Per channel into 4 ohms...............40W, 0.08% THD
    Per channel into 2 ohms ..............50W, 0.3% THD
    Bridged into 4 ohms.....................100W, 0.3% THD

    RMS Continuous Power (at 14.4V)
    Per channel into 4 ohms...............60W, 0.08% THD
    Per channel into 2 ohms...............80W, 0.3% THD
    Bridged into 4 ohms.....................160W, 0.3% THD
    Max. Power (at 14.4V)
    Per channel into 4 Ohms..............120W
    Bridged into 4 Ohms....................320W
    This should help.

    Apr 30, 2010 | Alpine MRV-F407 Car Audio Amplifier

    1 Answer

    Power Acoustik LT 980-2 clipping while bridged pushing 1ohm load


    Hello, your problem is that your amp is rated at 4 ohms bridged mono ans 2 ohms stereo. If your running it in stereo you need to raise the ohms to 2 ohms a channel and if your running it bridged into 1 channel you need to be running it at 4 ohms. Please rate this solution please so I can prgress on FixYa.com. Thanks!

    Dec 18, 2009 | Car Amplifiers

    1 Answer

    Sony xplod xm-1652z amp


    You probably have the output bridged at 2 ohms. This amp is not a 2 ohm bridged stable amp. It is 2 ohm stable only in stereo. That means each channel can be 2 ohms, buts not bridged at 2 ohms.

    If you have two 4 ohm speakers that are wired in parallel and then you bridge them, you have a 2 ohm load.

    They only safe way to use two 4 ohm speakers is to run one speaker to each channel and then you have a stereo 4 ohm load.

    When you use a 2 ohm load you get twice the current draw thru the amplifier as you would with a 4 ohm load. That means that the fuse you are using, the rating the amplifier is designed for, will blow any time you have a big bass hit.

    If you are not using a 2 ohm bridged load, and you are using a 4 ohm bridged or something the amplifier is rated for, and you still have this problem, you may have a bad speaker. Even a speaker that will play can sometimes be on the brink of shorting out and causing the amplifier to draw lots more current than it is rated for.

    If this is the case, you should go and get your speakers checked and see if they are still measuring at 4 ohms or at least close to it. Most speakers will measure a little lower than what the are rated. It is not unusual for a 4 ohm speaker to measure at 3.5 ohms, but if it is less than that, you problem is the speaker. Even if the speaker still plays.

    I hope this was helpful for you, if you require any further help just ask.

    If you did find that this was helpful in solving your problem, I would really appreciate a good rating.
    Thanks and have a great day,
    Dave

    Jun 19, 2008 | Sony Xplod XM-1652Z Car Audio Amplifier

    1 Answer

    Pioneer prsx720 wiring question


    If the subs are dual 4 ohm voice coils, you could hook the DVC's of each sub in parallel ("+"'s together, "-"'s together) making each sub essentially 2 ohms. Then connect one sub to each channel of the amps. This will put about 200W on each sub.

    Mar 14, 2008 | Pioneer PRS-X720 Car Audio Amplifier

    1 Answer

    Mtx 801d


    ASSUMING that the amp is OK with a 2ohm load then you "set it up" by the configuration of the speakers you use. Two 4 ohm speakers if parallel will give you a 2 ohm load. However, if you are bridging the ouputs then a single 4 ohm speaker bridged between the two outputs will put a 2 ohm load on each channel. Be very careful if you are bridging the outputs that you know what you are doing. On average, when bridged wrong (too much load) the amp will last about one month before it fries. Get some help if you are bridging. Be sure not sorry.

    Jan 14, 2007 | MTX Thunder 801D Car Audio Amplifier

    1 Answer

    My Kenwood 800watt amplifier


    Sounds like you have overloaded your amp. When you bridge you MUST make sure that you still have the proper speaker load. One 4 ohm speaker on one channel is fine, but when you bridge that same 4 ohm speaker, it gives you a 2 ohm load on each of the two channels that are now bridged. If you made the mistake of wiring two 4 ohm speakers in parallel (plus to plus and minus to minus) then when you bridge you will be driving a one ohm load on each channel. This is very close to a dead short. Stop using your amp at once until you get your speaker load correct. This will damage your amp and it will cause you to have to go to a repair shop to fix it. DO NOT RUN YOUR AMP ANYMORE UNTIL YOU FIX THIS. Good luck.

    Jan 22, 2007 | Kenwood KAC-9152D Car Audio Amplifier

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