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I have a studiomaster 1200D power amp that i want to use in bridged mode (1200w @ 8 ohms).This will be used to power a pair of 8 ohm Bass cab's.As running a Speakon speaker cable from the bridged point of the power amp into the first speaker cab then daisey linking it to the next speaker cab may affect the impedence.Please can you help.Thanks.Peter.

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How do you change from 4 to 8 ohm output on a phonic 1860 mixer


Stereo and bridged mode selects automatically. Stereo mode gives 4-16 ohms per side. Bridged mode is only from 8-16 ohms. This impedance match is created by the combination of speakers you use. If you link any speakers, the wiring is usually going to be in parallel because of the sockets wiring in the cabs. Any time you link 2 speakers in parallel, it cuts the impedance in half. Remember that in bridged mode, do not link 2 8 ohm sets together because this will create a 4 ohm circuit which it will not allow. This can only be done in stereo mode. It is ok to use speaker combinations of higher impedance, but never go lower as it would cause damage to the power amp.

Apr 03, 2013 | Music

1 Answer

Speaker daisy chaining , am I going to damage my amp etc.?


The Peavey CS4080HZ is intended to place 2,040 watts
per channel into four-Ohm-rated speaker
impedances. The "HZ" suffix is intended
to state the amplifier has a relatively high
impedance output and is optimized for no
lower than four-Ohm loads. Are you strapping in Bridged or Stereo Mode? Bridged Mono Operation
Both amplifier channels can be bridged together to make a very powerful single-channel monaural amplifier. Use
extreme caution when operating in the bridged mode; potentially lethal voltage may be present at the output
terminals. To bridge the amplifier, depress the rear panel Bridge switch to the IN position. Direct the signal to channel
A's input and connect the speakers across the hot outputs (the "+" binding posts) of channels A and B. Only channel
A's input attenuator is active while in Bridge Mono mode. Both connectors are strapped together, so either connector
can be used with a patch cable to drive the input of another amplifier.
Unlike the stereo mode, in which one side of each output is at ground, both sides are hot in bridged mode. Channel A's
side is the same polarity as its input with the minimum nominal load impedance being 4 ohms (equivalent to driving
both channels at 2 ohms) in bridged mode. Driving bridged loads of less than 4 ohms will activate the DDT
circuitry, resulting in a loss of power, and may also cause a thermal (overheating) overload.
Therefore, check the impedance of the cabs for each mode. Remember, if you connect two individual speakers in Parallel (+ to + and - to -) you cut the impedance in half. Two 8 ohm speakers in parallel now have a load of 4 ohms. Series connection + to - to + to -, will double the impedance. Two 8 ohm speakers will have a load of 16 ohms.
I have actually taken a two speaker cab with a 4 ohm impedance and opened up the back to re-do the wiring. I rechecked the impedance with a ohm meter. So yes, be careful. Whatever you do, keep the speaker lengths as short as possible. Buy really good speaker wire or if you make your own, go with 10 gauge wire.

May 02, 2017 | Music

1 Answer

I have 2 12'' subs 1300.watts and 2 1200watts amps both bridge to push 2400.00watts do not sound lond enoungh


impedance mismatch cud be the culprit. make sure ur speakers are the right ohms for ur amp. most amps are designed to operate on a 4 ohms speaker load on bridge mode. some amps are never designed for bridge mode. so if u bridge these amps u will get less output. u have to be very careful when u make the connections. plus when u bridge two amps for 4 ohms load, the total impedance becomes 8 ohms. make sure ur speakers are 8 ohms. few ohms can make big difference on power amps.

Apr 07, 2010 | Sony Xplod 1200W Class AB Bridgeable 2-Ch....

1 Answer

I have a audiobahn a400t and im running 2-12''jh45 mtx jackhammers the speakers are wired in parallel stabel @ 2or1 ohm. the speakers are in a ported box. how do i run my wires to my hook these up right to...


Hello rattle822,

A pair of JH4512-04's can be wired to 2 ohms if the subs themselves are paralleled. There's only one voice coil and it's 4 ohm. If wired in series, the final impedance to the amp would be 8 ohms. They cannot be wired to 1 ohm.

In bridged mode, your 4-channel amp is only stable down to 4 ohms. You can bridge 2 of the channels to provide a relatively low 200 watts RMS X 2. The best power solution for your subs would be to bridge channels 1 and 2 and wire one sub to it. Likewise, bridge channels 3 and 4 and connect the other sub. If you connect both subs in parallel, the impedance will be too low causing the amp to overheat and possible fail.

As for the settings: Low pass filter on, crossover somewhere between 80-100, input levels to match your receiver, and bass boost to your personal preference.

Hope this helps.

Aug 13, 2009 | AudioBahn Car Audio & Video

1 Answer

Lt960-4 power acoustik Amp 4 channels mono


it can be used as a bass amp. if each pair of channels is bridged then you will basically have a 2 channel amp. just be sure to set the x-over's to lpf for subwoofers. I checked the power ratings, and bridged at a 4 ohm load will give you 250 rms watts per sub, so thats enough to run most 10's or 12's. there wasnt a rating for a 2 ohm load, but your amp should support it.

Aug 03, 2009 | Power Acoustik LT-980/2 Car Audio...

1 Answer

Not a problem just a question


  • 100 watts RMS x 2 at 4 ohms
  • 200 watts RMS x 2 at 2 ohms
  • 400 watts RMS x 1 at 4 ohms in bridged mode
  • stereo or bridged mono output
  • 4-ohm stable in bridged mode
  • Tri-Way capable
  • requires 8-gauge power and ground leads — wiring and hardware not included with amplifier
  • 50-250 Hz high-pass/low-pass (12 dB/octave) crossovers
  • wired remote included for fingertip control of Punch Bass (0-18 dB boost at 45 Hz)
  • MOSFET power supply and output devices
  • MEHSA mounting technology increases the heat transfer from the MOSFET output devices to the heat sink, for higher power output, lower operating temperatures, and greater reliability
  • TOPAZ — noise-killing differential inputs that eliminate 80% of ground loop noise
  • Trans•ana circuitry keeps preamp voltages low and signal paths simple for outstanding audio quality
  • NOMAD — advanced protection circuitry for "intelligent" shutdown protection
  • speaker- and preamp-level inputs
  • 11-1/8"W x 2-3/8"H x 9-7/8"D


  • Wire your sub in bridged mode (4 ohm mono)
    + to + on amplifier
    - to - on amplifier
    (using bridging terminals)

    Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.

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    Crown amp xs900 will not reset



    naz, get a hold of crown, tell them whats up. check all fuses and connections first. the unit is worth $900.00. they should be a little understanding.

    Features
     

    • 2-ohm dual (per channel) : 1200W
    • 4-ohm dual (per channel) : 900W
    • 8-ohm dual (per channel) : 600W
    • 4-ohm Bridge : 2500W
    • 8-ohm Bridge 2100W

    • Indicators for : Signal, Clip, Power, AC Mains, Fault, Bridge, Temp.
    • Housed in a rugged, all-steel 2U chassis
    • Microprocessor-controlled protection system.
    • Flow-through ventilation from front to back.
    • Internal heat sinks with forced-air cooling for rapid, uniform heat dissipation.
    • EIA Standard 19-inch rack mount width
    • Safe with all types of loads.(2 to 8 ohms in Stereo, 4 to 8 ohms in Bridge Mono.)

    Inputs 

    • XLR-¼" combo connectors: One per channel
    • 3-pin female XLR connector and TRS ¼" phone jack accept balanced or unbalanced signals.
    • 3-pin Phoenix-style connectors (2-channel models only),One per channel, accepts balanced or unbalanced signals.

    Output 

    • Balanced XLR connectors (2-channel models only)
    • One per channel, 3-pin male XLR connector in parallel with XLR-¼" combo and Phoenix-style input connectors for daisy-chain operation.
    • 5-Way binding post output connectors: One pair per channel; accept banana plugs, spade lugs or bare wire.
    • 4-Pole Speakon output connector (2-channel models only)
    • Accepts a 4-pole Speakon connector.

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    3 Answers

    Help me...


    If you had 4 single voice coil speakers you can create either of those 2 ohm or 4 ohm setups. If you run 2 of them in parallel you will get the 4 ohms. If you run 4 of them in parallel you will get the 2 ohms. In parallel I mean that you connect the positives together and run them to the positive on the amp and the connect the negatives together and run them to the negative on the amp. Let me know if you need more help. Good Luck.
    -Andrew Hawkins

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    1 Answer

    How should I wire up this amp and sub


    The amp's not actually a very good match for the sub, since the sub can be wired for 2 ohms or 8 ohms, and the amplifier is most efficient at 4 ohms in bridged mode. My advice would be to wire the amp in bridged mode, and wire the sub for an 8 ohm load. To do this, the amp's (+) wire should go to the (+) terminal on one of the sub's voice coils. Then run a wire from the (-) terminal on the OTHER voice coil to the (-) terminal on the amp. The remaining (+) and (-) terminals (on opposite voice coils) should be connected to each other with a wire. Your original wiring setup had the amplifier connected to only one voice coil, while the other voice coil was shorted.

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