I tried the duralium amp with my AK380Cu. Imho, it sounds not as good as AK380Cu + Cu amp. Using a duralium amp, you will lose some of the sonic advantage of the AK380Cu + Cu amp over AK380 duralium + amp. You may not notice much difference when using your Elear, but you will for sure after getting your Utopia. Even though both Elear and Utopia can be driven from AK380 alone, even unbalanced, I would recommend getting the amp and using ist balanced output. The balanced output of the amp has more authority and finesse, compared to player alone. Some guys even notice this when using IEMs. So, even though using your AK380Cu with the duralium amp will not be ideal solution, it will sound better with most headphones than your Ak380Cu alone. If you can get a duralium amp very cheap, try it. There is nothing really wrong with it. In case that you are able to get a copper amp for a reasonable price, buy it and you will not regret, imho. The Cu amp is worth the extra money, unfortunately.