GGMM A1 Portable Headphone Amplifier, HiFi Digital Stereo Audio Amp for Android (Gold)

Great louder than aux input on my phone, Like that it's lightweight and portable easier to use works with any micro USB phone, I have a Moto G5+ and loving it so far no complaints just wish it had Bluetooth connectivity also but overall pleased with it really good clarity and extra volume no static sounds at all for $10 you can't beat it.

War auf der Suche nach irgendeiner Lösung, die Lautstärke meines Smartphones (Huawei Nova) erhöhen zu können, da es von Haus aus sehr sehr leise war. Habe unterschiedliche Kopfhörer, diverse Equalizer-Apps dgl probiert, jedoch hat leider nichts geholfen. Auf der Suche nach Verstärkern bin ich dann auf diese kompakte Lösung gestoßen und muss sagen, ich bin bis auf einen Minuspunkt sehr begeistert (Gerät seit 2 Monaten in Verwendung:Pros:-) Extrem leicht und handlich: Da ich die erhöhte Lautstärke v.a. zum Laufen gehen benötige, war dies das wichtigste Kriterium. Man steckt den Verstärker zwischen Handy und Kopfhörer und durch sein Design stört er wirklich kaum!-) Toller Lautstärken-Boost: Man steckt ihn an und er verrichtet sofort seine Arbeit (zumindest auf meinem Smartphone keine Softwareinstallation dgl erforderlich) und dies wirklich zu meiner vollsten Zufriedenheit. Ich kann Musik nun erheblich lauter genießen und dies ohne merklichen Qualitätsverlust.-) Gute Verarbeitung-) Bezieht Strom vom Smartphone, daher kein integrierter Akku/Batterien (keine Angst, fällt beim Stromverbrauch nur minimal auf)Kontra:-) Hier gibt es nur einen Punkt, der im Alltag leider doch störend ist: Ich kann nun nicht mehr das Bedienfeld (Vor- Zurückschalten, Pausieren) an meinen Kopfhörern verwenden, wenn der Verstärker dranhängt. Das wird vl technisch sowieso unmöglich sein (?) aber vor allem beim Laufen ist es doch mühsam...Alles in allem ein tolles Gerät!

Prodotto davvero ottimo, piccolo e leggero, semplicissimo da collegare, potenzia di molto il volume delle cuffie senza distorsioni di nessun tipo e la qualità audio è molto buona, se proprio dovessi fare una piccola critica personalmente aggiungerei un sistema che indichi il livello del volume e magari lo memorizzi ad un livello prescelto per non doverlo alzare da capo ogni volta che si collega al telefono.

I bought the gold (well more champagne) version of this amplifier mainly because my trusty old Galaxy Note II was not giving enough grunt to my FiiO EX1ii In Ear Monitors.I have the Note running Marshmallow and play normalised mp3 through Neutron player and this means that the loudest volume is little more than background music. So even with in ears I can barely hear any music over the background of the tube even when its not noisy.So I am not looking for a ultra high-end headphone amplifier, just for something decent; reasonably priced and small.First of all size it is small, some headphones have controls larger than this. My old sony discman had a "remote control" which was 3 x the size.It is solidly made, I don't know how long it will last and the captive cable is probably the weak point, but build is goodThe usb connector is quite stiff, but the connection is positive, and amazingly worked straight off. No faffing around. A little white led shows up the connection.It means I need to keep my phone upside down as the usb port is at the bottom of the phone, and the flat fixed cable is quite stiff so pokes out of my pocket. For me this is fine.You can increase, decrease the volume, pause and a double click skips the current track - so this is fine.I haven't taken any calls when using it so I don't know how it behaves here. But I assume there is no mic passthrough.Volume level, I haven't maxed it out but I have had to turn it down, it is way louder than my phone by itself.Sound quality - the specs are decent but not amazing. I have tried it with the Fiios and a pair of alessandro MS1 (Similar to Grados) using 240 kbps mp3 and spotify at 320 kbps. The sound is fine, to the extent that I switched off Vipers Audio which I had been using to compensate for the Note's sound.Battery life, I am not really noticing the extra tug on the battery. I can still get 3 days out of my phone (only light use) and I listen to music for about 4 hours during that time. I reckon that Vipers Audio used more battery, so all good there.I don't have any hesitation in recommending this dac/amp if your criteria are similar to mine. You will need to spend significantly more to get better sound (I know as I have)caveats.I have not had it long, so it may conk out. I have not rigged it up to high end headphones and compared it to a high end amp; but I am not noticing any serious deficiencies.

今まで使っていたイヤホンなどの音質の常識を覆すほど良い音がでます。まず高低の音がはっきり響き渡るだけでなく、音一つ一つに生きた感じがするというか・・・なんせ今までと全く違います。アンプいというイメージでは想像できないほど小型だし、使いやすい。セールで半額以下になっていたので試しに購入してみましたが良かったです。Youtubeなどに利用できなかったのでそれが残念ですが。説明書もできれば日本語がいいですね。

Appena inserito sullo smartphone il DAC viene subito rilevato (appare la notifica di utilizzo scheda audio esterna) migliorandone sensibilmente la qualitá di riproduzione che sará sempre massima indipendentemente dalla fattura del telefono-tablet android.Nulla da dire anche per quanto riguarda l'amplificazione. Pilota le Momentum 2.0 in maniera egregia a volumi decisamente piú alti rispetto al collegamento diretto.