Question about Legacy LA938 Car Audio Amplifier
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Posted on Jan 02, 2017
never attemp to bridge your amps specially this type of amps. this are too very complicated. you may blow your amp if you will attempt it again.
Posted on Jan 26, 2008
SOURCE: Legacy Amp 2600 watt HELP
The settings you have will not break anything and may sound OK.
But they may not be optimum for getting the best bass from your system. The SubSonic setting filters out frequencies below the threshold of hearing allowing the amp to put more power into the frequencies that can be heard. So, it should be set to about the same frequency that your enclosure is tuned for or just a little lower. If your enclosure is tuned for 35Hz, then the subsonic should be close to maximum.
Similarily, the low pass sends all frequencies below the setting to the subs, (other than those blocked by the subsonic filter) and is commonly referred to as the "crossover" frequency. Typical crossover frequencies for subwoofers are 60Hz, 80Hz and 100Hz. For a ported enclosure, lower is probably better.
The phase shift should be set to the position that best synchronizes the bass with the music. Because of the additional wiring required for the subs, the signal to them is sometimes slightly delayed causing the bass to be "out-of-sync" with the rest of the music. The thump of the bass comes just a little sooner or later than expected. If the bass sounds out of phase, turn the phase shift on, otherwise leave it off.
The "gain" or level control allows you to match the amps input to your head units subwoofer output. The best setting is usually as high as possible without distortion. Set it by turning up the head unit volume to about 3/4 maximum and then advance the amp gain until your subs just begin to distort. Then back it off slightly.
These settings should allow your amp to put the most power into the frequencies that your subwoofers are designed for and hence produce the loudest and lowest bass.
Hope this helps.
Posted on Jun 28, 2009
SOURCE: amp turns off
what ohm is it running at? if you have all three hook up it parallel then its to low of ohms and it would be louder if you unhook your 10" sub as it moves differently form the 12"s and it cancels out some bass. but if you want it then you have to change the wiring around a bit. take the positive wire off a 12 and put it on the positive side of the 10 and then take the ground for the 10 and hook it up to the positive side of the 12. so you should have one wire from the amp going to the negative side of the 12 and one going to the positive side of the 10 and a jumper wire from the 10 to the 12. and if it still shuts off then you have bigger problems.
Posted on Sep 25, 2009
check out audiobahn.com go to tech support and go to wiring diagrams type in how many speakers DVC or SVC and it will show you how...
Posted on May 11, 2010
You should definately bridge them. Firstly, lay the 2 speakers face down next to each other. Note the connections +- +-. The first + will go to the amplifier. The next terminal(-) will be connected to the next speaker(+). Take the last(-) and connect to amplifier. Please note that your amplifier has a bridge section which is normally the first + and the last- on the two channels. Connect your woofers on the bridge.
Posted on Jun 09, 2010
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