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Hmmm... 2.1 power, 15 bucks...

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  • Hmmm... 2.1 power, 15 bucks...

    Lepai.

    Hmmm... wonder if this uses Tripath or not? Who wants to order one and find out what it's made of lol?

    If it is even 1/2 way decent, it is the answer to how I am going to power my ultra budget 2.1 system I have in the works for the wifey's work desk...

    I am so cheap.
    Don't listen to me - I have not sold any $150,000 speakers.

  • #2
    Re: Hmmm... 2.1 power, 15 bucks...

    If someone orders one, let me know how it works out! Working on a little system for the bathroom with exciters on the shower walls and a little 8" logitec powered sub. Might be perfect for the exciters!

    BTW - love the label on the sub output - "SUPER BASS" :p

    Eric

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    • #3
      Re: Hmmm... 2.1 power, 15 bucks...

      One of the links from a Google search says it uses both Toshiba and Sanyo amp chips:

      http://www.hyperspin-fe.com/forum/sh...ad.php?p=58760

      Both chips are old and don't have great specs, but it's hard to argue with the price and the amps are probably OK for budget applications.

      I like those old datasheets that look like they were printed on a Daisy wheel printer
      Free Passive Speaker Designer Lite (PSD-Lite) -- http://www.audiodevelopers.com/Softw...Lite/setup.exe

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      • #4
        Re: Hmmm... 2.1 power, 15 bucks...

        Neil, I know next to nothing about amplifier chips, what could I expect from the Sanyo/Toshiba? What are their limitations? Distortion? Frequency response? Wifey is shooting for a low volume "get some work done" set up.
        Don't listen to me - I have not sold any $150,000 speakers.

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        • #5
          Re: Hmmm... 2.1 power, 15 bucks...

          Lepai does make a Tripath amp. I bought one on eBay for 21 bucks, as I recall, and it came with a hefty AC adaptor similar to what you get with a laptop. Now, I'll readily admit that I'm not an audiophile, but I have to say the little amp sounds good to me. I think your wife would be quite happy with it, unless she's a very critical listener. The model I have is a Lepai 550.

          http://cgi.ebay.com/Lepai-TRIPATH-TA...ht_3360wt_1034
          Tritrix HT:http://techtalk.parts-express.com/sh...d.php?t=222519
          Dayton 12" Subwoofer: http://techtalk.parts-express.com/sh...d.php?t=222930
          Overnight Sensations: http://techtalk.parts-express.com/sh...d.php?t=223751
          Cerberus sub: http://techtalk.parts-express.com/sh...hlight=cerebus
          Duellatis: http://techtalk.parts-express.com/sh...d.php?t=224943
          NTN's: http://techtalk.parts-express.com/sh...d.php?t=227902

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          • #6
            Re: Hmmm... 2.1 power, 15 bucks...

            I just installed that little Lepai in my daughters room last week - sounds great!
            Don't listen to me - I have not sold any $150,000 speakers.

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            • #7
              Re: Hmmm... 2.1 power, 15 bucks...

              Originally posted by johnnyrichards View Post
              Neil, I know next to nothing about amplifier chips, what could I expect from the Sanyo/Toshiba? What are their limitations? Distortion? Frequency response? Wifey is shooting for a low volume "get some work done" set up.
              As I said...they will probably do fine for this application. The chips look like older designs (at least the Toshiba chip is fairly old), and they don't have the low distortion of either the Overture amps (LM3886-series) or the Tripath. The newer chips are typically less than .1% distortion, and the older chips in the LP-838 amp are closer to .3% for the higher frequencies. Can you or the wife hear the difference with budget speakers? I have no idea.

              The amp chips themselves do not have a frequency response limitation. However, they might be a bit noisier than the newer parts because the recommended gain is fairly high (40db for both amps). The noise might be a problem ("hiss").

              The Sanyo/Toshiba amps are linear, so there is a lot more heat generated per output watt than for the Tripath. This won't be a problem at moderate listening levels, but it does require a larger power supply to get the same amount of output power.
              Free Passive Speaker Designer Lite (PSD-Lite) -- http://www.audiodevelopers.com/Softw...Lite/setup.exe

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              • #8
                Re: Hmmm... 2.1 power, 15 bucks...

                i actually was just trying to find information about this the other day. ironically, i came across it while looking into lepai and other non SI/dayton t-amps, which was prompted by seeing pictures of the pink lepai you have in your daughters room in your spoiled kid thread on here. i was wondering the same thing, about which chip this one uses. i wound up buying a black lepai with the TA2020, but what the heck, i think i'll buy one of these too. the ebay offerings of this model the other day were like $30, and didn't have a power supply. for $15 including ac adapter, you can't go too wrong. lord knows i've spent $15 on far dumber things. if you wanna wait, i'd be happy to crack mine open once i get it and let you know whats inside.

                in case you're interested, here's a video of it in operation that i found. doesn't really tell you anything you didn't probably already know, but its one of the only things out there pertaining to this amp. am i the only one wishing that light didn't flash? http://video.google.com/videoplay?do...6496921070498#

                also, here's a flickr album with some pictures, one of which shows you how its size compares to the SI/dayton. http://www.flickr.com/photos/ditzlerphoto/4423366762/

                EDIT: bought.

                EDIT 2: there are a couple other lepai models on ebay now that i don't remember seeing the other day. namely, the lp-808 and the lp-a2. the 808 has very little info in the description. has a superbass switch instead of a knob. the a2 says it's three channel but doesn't appear to have any subwoofer controls, and no pic of the back. the description mentions that it uses a philips chip, the TDA7057Q (that i've not bothered to research).

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                • #9
                  Re: Hmmm... 2.1 power, 15 bucks...

                  Thanks for all the info guys, I found it on the eBay this morning for $14.35, shipped so I said what the heck. Bought one. Wife will be happy I spose.
                  Don't listen to me - I have not sold any $150,000 speakers.

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                  • #10
                    Re: Hmmm... 2.1 power, 15 bucks...

                    Be sure to let us know what you think of it. I just placed an order for one.

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                    • #11
                      Re: Hmmm... 2.1 power, 15 bucks...

                      Definitely curious. It has to at least be as good as the amp you'll find in any random set of computer speakers under $200.

                      I wonder if there's any XO between the L/R and the sub. If not, I might finally have a use for that 12mH coil I have laying around.

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                      • #12
                        Re: Hmmm... 2.1 power, 15 bucks...

                        Originally posted by Dirk View Post
                        Definitely curious. It has to at least be as good as the amp you'll find in any random set of computer speakers under $200.

                        I wonder if there's any XO between the L/R and the sub. If not, I might finally have a use for that 12mH coil I have laying around.
                        I was thinking the same thing WRT to a pile of 9.6 mH coils I have...

                        I can probably get a rough FR curve using my sound card and my multi-meter, if anyone is interested.
                        Don't listen to me - I have not sold any $150,000 speakers.

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                        • #13
                          Re: Hmmm... 2.1 power, 15 bucks...

                          Those are big coils, and a lot of cash! I get sticker shock when I have to cough up $15-20 for an inductor.

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                          • #14
                            Re: Hmmm... 2.1 power, 15 bucks...

                            Originally posted by Dirk View Post
                            Definitely curious. It has to at least be as good as the amp you'll find in any random set of computer speakers under $200.
                            Those chips were designed for car stereos. That's not a bad thing--many car amps are quite good. But you could probably go to a Goodwill store or yard sale and pick up a used car amp that also has a CD player for about the same price.

                            Actually, it would make sense to use some of the new car stereos for DIY speakers. A lot of the new radios have the USB connection for the iPod--not needed if the speakers are connected to a computer, but great for garage or kitchen speakers. If you buy a new one with Bluetooth connectivity you could even play your iPhone through it.
                            Free Passive Speaker Designer Lite (PSD-Lite) -- http://www.audiodevelopers.com/Softw...Lite/setup.exe

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                            • #15
                              Re: Hmmm... 2.1 power, 15 bucks...

                              These 2.1 amps are really nagging at me. I had a very weird 2.1 idea I wanted to try out since last fall; I even have the drivers on-hand. The drivers are pretty far on the "budget" side of the price spectrum, so the PE/Keiga plate amp was overkill. Now, at $15-20, we have a good price match!

                              In fact, I was all about to abandon this project idea in the last few weeks; sell off the drivers or whatnot, but these little ampies have renewed my interest. So... what's the story on the .1 output? Is there a Low Pass filter at all? If not, I guess it's not the end of the world if I had to go passive, since the builder would only have to purchase 1 channel's worth of the components. Still, anyone who has theirs, chime in!
                              Isn't it about time we started answering rhetorical questions?

                              Paul Carmody's DIY Audio Projects
                              Twitter: @undefinition1

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