Question about Legacy - American II: 2 Channel 1200W American II Series LA790 Car Audio Amplifier

1 Answer

Installation i have a legacy amp 1200w la790. It is all hooked up except the wires that run to the right and left rear speakers. i don't know how or what to exactlly attach them to. please help! thanks

Posted by on

  • Tygh Duval
    Tygh Duval May 11, 2010

    Please provide more detail about your system setup (i.e. speakers, head unit, other amps, etc).

×

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

  • Expert
  • 290 Answers

If you've got a standard 4 speaker system (2 front, 2 rear), your best option is to connect both left speakers to the left channel amp output and both right speakers to the right channel amp output. The only thing you lose is the ability to fade the speakers front to back.

Posted on Mar 27, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

How hook amp up to a oem integration SNI-15 line output convertor


The amp needs an RCA input to communicate with the head unit. SOLDER the wires that come out of the head unit for the front speakers to the SNI-15, making sure that the polarity and right/left is correct. Do this for the front and rear speakers if you have a 4 channel amp. Cut the wires if you add new speakers and run the new wire from the speakers or sub box directly to the amp, or skin back the wire insulation and tap on if you use the factory speakers :( then plug your RCA cable from the SNI-15 to the input side of the amp. Don't forget that most new cars have their own amp so you might have to locate it and bypass the speakers wires around it. Don't make a mess in case you have to put everything back to factory for resale. You can avoid all this by installing a new/modern head unit with built in RCA outputs for front, rear, and sub woofer. I hope this helps. Ray

Apr 23, 2014 | Car Audio & Video

1 Answer

How to install jensen 40w+40w a-80


I have one of these new, in the box, with no instructions.

Specifications:
Power Output: 40W/Chan Maximum, 18W/Chan RMS
(20hz-20khz into 4 ohms at less than 1% THD)
Freq. Responce: 20hz-30khz, +/-3dB
Signal to noise ratio: 80dB, A-weighted
Input Sensitivity:
Low Level, 100-500 mV
High Level, 1-5v
Input Impedence:
Low Level, 10k ohms
High Level, 27 ohms
Load Impedence: 4-8 ohms allowable (4-8 ohm speakers)
Power Requirement: 14.4v DC (10.8-15.6 allowable)

As you can see the RMS wattage output of these units is only about 18W maximum.

I am planning on using the amp I have on a low power factory car radio. A low power factory radio output should be somewhere between 6-12 watts rms/channel. I will be using the "High Level" inputs for this. DO NOT connect a radio with a higher output power. If your radio says "High Power", 25W/channel, etc, do not connect to this amp. (exception: you can use the "line out" connectors, if so equipped, See Below). I don't have the connector for the high level input so i don't know what I'll do to hook up to it. I'll probably just run wires out of the amp, in lieu of the connector.

The "Low Level" inputs are for an unamplified, line level signal ("line out" connection of a radio, portable CD player, etc). Do Not connect a greatly amplified signal to these connections.

I don't know much about the "Input Sensitivity" control (pot). I'll be leaving it on "Low" for my initial test.

The grey wires are the right speaker wires and the white wires are the left speaker wires. The grey wire with a black tracer mark is the right speaker positive (+) wire. The white wire with a black tracer is the left speaker positive (+) wire.

The blue/white wire is for attachment to your radio's "Auto Ant" (power antenna) connection (usually a orange wire, I said USUALLY). If you have a power antenna on your car, simply splice into the wire running from your radio to the antenna. This blue/white wire activates a relay in the amp which, in turn, completes the circuit through the yellow (+) power wire (See Below). - Alternative 1: You could run this wire directly to your battery with a switch to turn the amp on. You would need to place an in-line fuse of 2amp. - Alternative 2: You could connect this wire to the accessory fuse in your fuse box. If this is done, again, attach a 2amp in-line fuse for extra protection. (Note: if attached to your fuse box accessory fuse, the amp will be on even if you're not using the radio. You could have a switch here also). These are just suggestions. The most common way to connect the blue/white wire is the "Auto Antenna" wire of your radio.

The large black wire is main Ground (-) for the amp. The large yellow wire is Positive (+) power to the amp. Ideally, these should be connected straight to your battery's (+) and (-) terminals. The yellow wire on your amp should have an integral in-line fuse holder with a 7amp fuse. If not, add one. Of course, the black ground wire could simply be attached under a screw, into the body of the vehicle.

Hope this helps !

Aug 12, 2012 | Jensen Car Audio & Video

1 Answer

I have phase linear uv8, need to know how to get subs 2 work! Amp goes into protect mode when rca's r plugged in, there r 3 sets of preamp out puts 1 front left and front right, 2nd is rear left rear...


try testing the amp without speakers plugged in. Run the sub preamp out to the amp that you will drive the subs with, but don't wire up the subs yet. Test for protect mode kicking in.
Yes - unplug the rca ins from the amp. retest.
No - Problem lies within the sub wiring. What is the load on the amp (measure with an ohm meter)? If it is below 4ohms, chances are the amp can't dip that low. Give it more resistance by wiring it differently (series vs. parallel)

Bruce

May 05, 2011 | Kicker Car Audio & Video

1 Answer

How to hook up the wiring on the crunch 520.5 need to know the gage for power


Hello,
  • I would go with some good 8 gauge. More than that for this amp would be overkill and a waste. Many people thing thicker wire is better but that is not the case. To thick of wire to the power feed can draw to much power and send the amp into protect mode. Also to thick of wire with an insufficient amount of power can actual hamper the amps true abilities.
  • Use stranded copper wire not solid copper wire for the best results of conductivity.
  • Make sure to run a 50 amp fuse inline with the power wire right off the battery. Amps surge and it is far easier to replace a $1 fuse than components inside your amp.
  • Your ground is best served running to a bolt in the floorboard. Using the same size, style and quality as your power wire is recommended.
  • Your remote wire will connect to the remote wire running from the back of your deck. The remote wire enables your amp to shut off when your deck is shut off. A simple 16 gauge stranded copper wire will suffice for the remote wire.
  • I recommend hooking the speakers up using one speaker per channel. I don't bridge amps really. If you want more power then buy a bigger amp.
  • The AV cords will go from your deck to your amp right to right and left to left.
  • That's the way to wire your amp.

Regards, Tony

Apr 22, 2011 | Crunch P520.5 Car Audio Amplifier

1 Answer

Legend Amp hook up manual.


Pretty Straight Forward get a 8 or 4 gauge amp wiring kit.

Run your hot wire to the +12V from the battery make sure to install the supplied inline fuse near the battery don't connect to the battery until installation is complete.

Run the REM to your stereo power ant. Wire. if available.

Run the GND to Metal Chassis Ground keep it as short as possible.

Run the RCA Cable from the back of the Stereo to the RCA Inputs or Low Level on the amp.

This amp is 2 Ohm Stereo Stable which means you can connect 2 (4 ohm) speakers in parallel to each channel or 1 (4 ohm) speaker on each channel or you can connect 1 (4 ohm) Speaker in bridged mode.

There are other speaker configurations you could use but you cannot drop the load below 2 Ohm in stereo mode and no lower than 4 ohm in bridged mode.

Hope this helps


Mar 25, 2009 | Legend LA1490 - American Legacy Series 2 -...

1 Answer

Amp issues


i myself would run a parallel bridged ciruit. basically run the speaker wires one positive on the right speaker side and one negative on the left side.

thanks

tom

Dec 23, 2008 | Car Audio & Video

1 Answer

No power in my amp


If you are going to try to repair this yourself and can't find a schematic diagram, read the following page. It should help you through basic troubleshooting.

Amplifier Repair Primer

If you have questions, let me know.

May 02, 2008 | Legacy Audio American Legacy II LA890 Car...

5 Answers

Wiring Diagram for Sony car amplifier XM-554ZR


You can download the installation manual from the link below: http://www.sony.co.id/support/product/xm-554zr?site=hp_en_ID_i It has the following diagram plus other hookup info... Please update the question & let us know if the information given was useful to you - Good Luck!

Aug 14, 2007 | Sony XM-2150GSX Car Audio Amplifier

Not finding what you are looking for?
Car Audio & Video Logo

Related Topics:

120 people viewed this question

Ask a Question

Usually answered in minutes!

Top Legacy Car Audio & Video Experts

Tygh Duval
Tygh Duval

Level 2 Expert

290 Answers

isaac johny
isaac johny

Level 3 Expert

796 Answers

xxxxxx xxx

Level 3 Expert

4724 Answers

Are you a Legacy Car Audio and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...