FRank liu d
Head-Fier
I noticed that the EA4 has a lot of adjustable settings. Like, there's this knob that lets you switch the amp from Class A to Class AB, and you can also switch between constant voltage and constant current to choose how the filament is powered.
During my listening session, I used the HD800S, AMT16, and Titanium Bell Plus.
I started with the HD800S (with the stock cable), set the voltage to 16V, constant voltage mode (CV), in Class AB. I found that it gave a really wide soundstage and could drive the HD800S with a lot of power. The details were rich and there was no harshness at all. The vocals were fuller and warmer. The bass was on the clearer side. I'd have liked it even more if the bass was a bit stronger.
Next, I tested two IEMs, the AMT16 and Titanium Bell Plus. Since both are low sensitivity (both are around 102db)earbuds, I went with low gain, constant current mode (CC), and dropped the voltage to 13V. With the EA4, both earbuds sounded more relaxed and spacious, with well-controlled TREs that weren’t too bright. The soundstage was expanded, and the bass was significantly boosted.
Overall, whether driving earbuds or headphones, the EA4 doesn't sound like a portable device; it's closer to the sound of a desktop unit.
Personally, I preferred how the EA4 drove the HD800S.
During my listening session, I used the HD800S, AMT16, and Titanium Bell Plus.
I started with the HD800S (with the stock cable), set the voltage to 16V, constant voltage mode (CV), in Class AB. I found that it gave a really wide soundstage and could drive the HD800S with a lot of power. The details were rich and there was no harshness at all. The vocals were fuller and warmer. The bass was on the clearer side. I'd have liked it even more if the bass was a bit stronger.
Next, I tested two IEMs, the AMT16 and Titanium Bell Plus. Since both are low sensitivity (both are around 102db)earbuds, I went with low gain, constant current mode (CC), and dropped the voltage to 13V. With the EA4, both earbuds sounded more relaxed and spacious, with well-controlled TREs that weren’t too bright. The soundstage was expanded, and the bass was significantly boosted.
Overall, whether driving earbuds or headphones, the EA4 doesn't sound like a portable device; it's closer to the sound of a desktop unit.
Personally, I preferred how the EA4 drove the HD800S.