Lepai LP-168HA 2.1 2x40W Mini Amplifier + 1x68W Sub Output

There are plenty of reviews detailing the features of this amp, so I'm going to discuss my specific setup, what worked for me, and what didn't. I purchased this amp to power the audio for my Burning Man bicycle, which is using a Tang Band W8-670C 8" 8ohm subwoofer in a ported enclosure, and two Tang Band W3-594SB 3" 8ohm drivers in sealed enclosures. MOSFET's, heat, and thermal paste My amp doesn't get very warm, even after an extended period of music at high volume. Several other reviewers reported poor factory application of thermal paste, so I was concerned that the heatsink wasn't getting warm due to the MOSFET's not making good contact. I opened it up to check and they looked just fine, but I went ahead and re-applied some thermal paste for good measure. After doing this I haven't noticed any difference in performance or temperature. Crossover The LPF crossover is a total joke. Mine "works" in that I can hear an audible change in the subwoofer output as I turn the knob, but the amp still sends the subwoofer nearly full-range input. Using only the included crossover, the overall audio quality is mediocre, and both the subwoofer and drivers were clipping well below the volume I had hoped for. I ended up purchasing a 225hz LPF crossover (http://www.amazon.com/gp/product/B00FNI3N4Y/), and it made a world of difference. The overall volume can now get much louder without clipping, the subwoofer hits harder, and the drivers sound great. With the crossover installed, this no longer sounds like a cheap ~$30 amplifier. If you are using this to power a subwoofer, do yourself a favor and get a crossover! You won't regret it! Power Source The included 12V 3A power supply works acceptably, but prevents the amp from reaching full volume. I've had the best luck with either a 12V 5A power supply, or a 12V SLA battery. Checking with an ammeter, the highest current I saw at full volume (with a bass-heavy track) was just over 4A @ 12V. Rattling I have this amp mounted on the subwoofer enclosure, and I quickly discovered that it likes to rattle. All of the knobs rattle, as does the case. The case rattling can be solved by putting some hot glue on the inside of the seams where the case pieces attach, but I'm still grappling with the rattling knobs. My "best" solution so far is a piece of electrical tape stretched across the tops of all of the knobs, but I'm sure there is a better way to do it. Audio Input Levels One unexpected problem is that a high input voltage is required for the amp to reach maximum volume. I first used a second generation iPod Shuffle. This worked in that sound came out of the speakers, but it just didn't get particularly loud. I then tried two modern Android phones (an LG G2 and an HTC One M8). The HTC produced the highest volume and clearest sound, but both it and the LG worked pretty well. You should try a variety of input sources if you're not happy with the volume. Final Thoughts Buy this amp (and a crossover)! I wasn't expecting much from a sub $30 amp, but it's a surprisingly cool little device.

First off, I bought this amplifier for home use. While compatible with cars it works for home use as well. I bought this amplifier to power my vintage RtR G-40 speakers and my Kicker Comp-10 subwoofer. Installation was incredibly easy, just plug in, connect speaker wire and you're good. For about 2 or 3 weeks it drove my speakers great. The sub, however, was terrible. The biggest feature here for the product (to me) was the subwoofer crossover. I noted that on reviews on PartsExpress.com the reviewers stated the crossover did not work but I took the leap anyways. The crossover does not work AT ALL, and this (being such a big thing for me) knocks this down two stars from five. After those 2-3 weeks I mentioned earlier, the amp went completely haywire. The sub output stopped working completely, and at first I thought the volume was simply down too far so I turned it up.....and instead of the sub volume going up, an incredibly distorted signal was being sent to the main speakers--how this is possible I have yet to figure out. But the sub output somehow switched to the speakers. Down two more stars. For the price, it works. PROS: Easy to install Delivers clear audio to main speakers CONS: Subwoofer crossover does not work Subwoofer output breaks after a few weeks Annoying blue LED that flashes with the bass Gets warningly warm even with the heatsink body

This little guy does what it does quite well. Forget the 40 watt stuff. It's not there. Same with the 68 watts for the sub. Perhaps peak, but otherwise divide by 2. That said, once I set aside my disappointment with the output and resisted the initial urge to cram it back in the box, we became friends. This isn't a wall of sound. But it will do a nice job amplifying the signal coming from your computer or iPhone. That's what it does. 1. Forget the AUX input on the front and head straight for the RCAs on the back. Sound quality is substantially richer. 2. Use the thinnest gauge you can find in that big box filled with speaker wire. It doesn't like the low numbers. 3. The manual is in Chinese. Unfortunately, I skipped class the day they taught Mandarin. The photos, however, are quite nice. No big deal, you can wing it without the instructions. 4. The crossover for the sub, at least on mine, seems to work as advertised. As others have noted, the sub volume is independent of the master volume. I quickly grew to like this feature. 5. Yes, the dials are small. But so is the amp. If you're skilled in Braille, you shouldn't have any trouble finding and using them. 6. It makes your desk look bigger. Which is where it belongs. It's a desktop amp that, when paired with decent speakers, makes for a very nice desktop system that won't have the cops pounding on the door. But when cranked up, you'll need to crank it down to hear your wife yelling at you to crank it down. (That's my version of a bench test.) Ignore the 2x40 and the 68. They ain't there. But if you can live with what is there, it rates those five stars. EDITED: Just stapled a salvaged 5A 12V power supply and a competent JBL sub to this puppy. I believe the police have also just arrived. Those 40 and 68 watts that aren't there? They're there. Just gotta find 'em. (You can get a 12V-5A thing on Amazon for just $8. Tape the windows first, however. I'm running the amp at 6. And I'm having chest pains.)

Lo pondria como ultima opcion de compra, el envio y la entrega muy bien, pero el producto en si deja mucho que desear no es lo que esperaba no tiene la potencia que dice tener y los bajos no son buenos, pero a razon de precio/calidad creo esta bien

とてもパワフルで満足です。ローパスフィルターで１００Khz以下の音をこのアンプで増幅して、振動デフューザーをつないでいます。 オルガンの音を自分で弾きながら楽しんでいます。ベースが青いランプを点滅させて地響きを立てています。

It's ouput power doesn't feel like 40W. I am totally disappointed.....

Reviewer background: I'm a relatively intermediate audiophile with many purchases of amplifiers and speakers creating a variety of systems for varying applications so I'd like to think this review has some credit. Having random drivers laying around left over from previous projects, I decided to make myself a soundbar for the bedroom which houses 4@2" full ranges (2 per side) sandwiching supporting 1" tweeters crossed at 3.5 khz and a 4" ported sub in the center; used '" maple GIS mdf core for enclosure. Now, enough of that, just describing intended use in case it helps. Discovering this amp a few months ago on Parts Express, it was my default choice (not too many options in 2 channel/sub amp combos with built in variable crossover) with small footprint, efficiency and just the perfect amount of RMS power; also love the LP-2020A+ which I've had for about 2 years and use for many driver testing applications due to its extreme portability. (using a 6amp power supply provides more power output and broader oundstage) Now Sound and power ratings. Reading a whack of reviews, people are brutal hard on this guy; just in case they forget.... It is an under $50ca -4/3 channel amp (two bridged for sub out) with free shipping.... Not a $700 mid ranged Denon/Onkyo/HK... so keep the biases at that level. It must have an updated power supply as well for some reviewers were talking about a 1.5 amp whereas mine came with a 3 amp which is quite sufficient, (may upgrade to 5a later to maximize though). I just received last night and haven't used all 3 channels combined yet but using a pair of high end bookshelves, hooked up the 2 channel full range channels then the sub out to one bookshelf and am extremely impressed. More power than some of the reviewers complaints estimating 8 RMS main and 20 sub @ 8ohms). Doesn't sound like much, but that is RMS, Dynamic will be way higher. The soundstage is clean, fully covering the 20hz-20khz spectrum, not a high current solid sound but still great for price point and my intended application. Also against other reviewers, the built in variable (50-200) crossover worked fine cutting out frequencies probably at about a 12db/octave curve above the set limit; perfect for smaller sub. Would suggest not using a sub driver above a 6" though due to the power limitations versus loss in QMS/QES resistance; larger sub will never reach close to SPL potential or Xmax either (maybe a cheap 8"). The sub channel and mains do have independent volume controls but once set, the source input should be your volume control anyway and this is a great option for sources with weaker/stonger low end signal or just adjusting to audio preferences (bass head versus the classical listener). The only con thus far is a ridiculous bright blue LED representing use of the sub channel, which would be fine if it stayed a constant but for some reason the designer installed a chip in the output circuit that flashes the LED in response to the bass frequency!?!? Why? Oh, and unless you speak Chinese, toss the manual immediately! Anybody who know enough to find/order this amp, will have enough basic audio knowledge to install/operate this unit however. Overall, impressed with performance, ease of use and aesthetics. As I stated before, will update with actual performance stats when free time becomes available. In the meantime, if this amp is a nominee in completing an audio work of art, don't bother over analyzing it's worth... it's a worthy purchase; equal cost to three jugs of beer and will keep a smile on the face longer... and more than one use. Any further questions/inquiries just post in comments below. Edit July/2104: Unit going strong, feels great hitting that power toggle knowing performance soon follows. However I switched its task from soundbar to outside music provider; I was wrong about sub size restrictions, using a relatively efficient single VC 10" subwoofer (4ohms) and 6.5" coaxials in custom boxes (all fits in big Rubbermaid tote) and my yard has the possibility of hosting a block party. Amazing output above neighborly limits, clear and potent. 10" sub actually hits descent mechanical extension with provided crossover at 80 hert cut off. This fantastic product for price amp should be all one needs for anything except Home theatre use, and even then if no need for 5.1 then this 2.1 would be sufficient.

ＬＥＰＹ ＬＰ－Ｖ３Ｓ から乗り換え サブウーハーを「繋がない状態」で試聴、低音はＬＰ－Ｖ３の方が出ていた 純粋に聞いた感じだとメインは高音設定に振ってある様子（サブウーハー出力あるから当たり前？） せっかくのＢＡＳＳコントロールがいまいち発揮されない ただサブウーハーを「繋いだ状態」だと五月蠅い位ブンブン鳴る、クロスオーバーが付いている点も良い こちらの方が出力がでかいのでちょっとのボリュームででかい音が鳴る！！素敵です ウーハー出力側は当たり前だがＢＡＳＳコントロール別駆動なのでなのでつまみ位置に依存せずなので前に書いた通りメインにもっと低音が欲しい感じでもったいない 全体のバランスはいいんじゃないかな 高音も綺麗に出ている感じがあるし、低音もＬＰ－Ｖ３に比べるとＢＡＳＳコンに頼らずブンブン鳴る感じも良好（ＳＵＢありきだが） コスパは相変わらず良いと思う パソコンのスピーカーから等システムＵＰしたい方にはオススメです 家もＰＣで音楽を聴く方なので重宝していますよ、余ったＬＰ－Ｖ３はサラウンド用にでも回します 評価はメインでＢＡＳＳコントロールがいまいちだったので☆１個マイナスにしました