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Lepai 4x45W Mini Amplifier with Remote USB MP3 Media Card FM
Is there a better FM antenna available that will work with this amp?
All I have been able to find have either fork terminal connections or a coax typel cable connector. RCA doesn't seem to be standard for FM antennas. The short piece of wire included with the amp is useless for picking up stations. The tuner just keeps scanning and never finds any stations, not even local stations.
No, we do not have any additional antennae available for this application. Honestly, I would try splicing the wire of your choice into the existing antenna, or simply use any old RCA cable longer than the one included you may have at hand. Generally, the longer the better.
Date published: 2012-01-27
Can i use 8D cell batterys to run this unit?
I have this Amp connected to a Speaker box-And i use it as a boom box--Its unreal how great it sounds!! I wanted to use it portable without the plug--I was thinking about hooking up 8 d batterys-(12) volts to the unit--Just wondering how long they would last?
A more popular choice for this type of application would be an SLA battery. I've linked a couple below for your reference. "Ah" refers to Ampere Hours, a higher value indicates that the battery will deliver power for a longer period of time between charges.
Date published: 2012-06-07
So I have this amplifier running 4 Dayton Audio DAEX25 Sound Exciters. I would like to make a portable radio using a small SLA battery.
How long at max volume would I expect to get out of a 12ah battery? Would this unit actually draw the 5 amps that it is rated for?
Well depending on the volume and the type of music you listen to, you would get a variable play time from 2-6 hours; 2 hours being heavy bass at full volume and 6 being a moderate volume rock or pop with moderate bass. The lower the volume and the less bass, the longer you have. 12ah sure is a hefty sla, so expect a while though. And just my two cents, but I wouldn't be using tactile transducers for this project only because they are nutorious for having a low output unless attached to very large thin surfaces, like the inside of a hollow core vaneer door or a large sheet of 1/32" steel, and the sound isn't always the best either. I would just splurge on two pair of dayton shelf speakers at a mere $30 a pair. But either way, you should consider using a 60 hz high pass so you don't waste amps on hard to reproduce frequencies while outdoors. What ever you choose, best of luck on the project! Be sure to add the project schematic to PE's projects section.
Date published: 2012-06-10
Is there a 3.5mm jack audio input because I'm confused about the "MP3"? And what is the RCA Audio Output for since it has outputs for to 4 speakers?
There is not a 3.5 mm input on this amplifier, but one could use a stereo 3.5 mm male plug to stereo RCA male adapter to allow connection of iPods, MP3 players, smartphones, or computers. I have listed one below for quick reference.This amplifier has a built-in MP3 decoder along with USB and SD/MMC card input. What this allows for is storing your songs in MP3 format on a storage device (such as a USB thumbdrive, SD card, or MMC card) for direct decoding and playback through the amplifier without the need of any other device.The RCA audio pass-through output is paralleled to the input (meaning that the signal that you provide to the input is the same as the output) and allows for the connection of additional amplifiers or direct connection to a subwoofer with a built-in amplifier that has RCA input.
Date published: 2012-01-17
does it have external antenna plug
yes-if you look at the rear view, lower right corner is a red RCA jack, copy/zoom to see the label" ANT."
Date published: 2012-01-16
Is there a "better" power supply than the one included that you recommend? If so, can you provide a link?
Use at your own risk, but I connected a 16V 4.5 amp IBM Thinkpad power supply to it (jack and polarity match), and I seem to get a little more clipping room. I can turn the volume knob up to 1:00 before distortion vs. 11:00 with the stock supply.Since is says "Car Amplifier" right on the unit, I am sure 16V should be no problem for it. Again YMMV.
Date published: 2012-10-28