I think I need to upgrade the amp?

@Hisoundfi it's not just talking about people, but instigators like Cinder with comments saying "I don't believe you" and dismissing a comment about gear, like they are the formative authority on all things sound. He also had one of the only dissenting opinions on the 4in1, but continues to...

Yes it does change the sound. I have three cables, and all three give the 4in1 different sound characteristics. The Tingo cable widens the soundstage a tad, while bringing the mids up, bass down, and smooth out the treble, which is my preference. The LZ cable gives more impactful bass, but the...

4in1 has world class timbre and bang for your buck clarity. Mids are dry with good energy, but not lush, forward, or the focus. Mids are clear though, with bite provided by the high mids and low highs. That means there can be spikes.

KZ has nothing that's designed as a critical listening earphones is why. The KZ house sound is designed for fun and toe tapping. If you are looking for sub $100 that's a technical listen, then you can go for the 4in1, Trinity Vyrus, SoundMagic E80, or VIVO XE800. I think the PMV 01mkii has...

No. This budget earphone does not exist. This is the mythical "giant killer" everyone who is here is waiting for?! The 4in1 is a mighty budget performer, but it doesn't best the A83 in my opinion, and really bests the P1 in a few categories. So it's not a giant killer. There are some amazing...

Come on, ****! Come out with a dual BA + 1 DD hybrid with the guy or gal who tuned the 4in1 back to tune this one? Charge $40 for it, and change how the game is played.

No. Movies should be pretty awesome with the bass slam. I mean choir music, or female vocal performances, not movies or movie dialogue.

My friend, the 4in1 are CHAMPIONS of genre hopping. I listen to a very broad band of music, and they handle classical as terrifically as black metal. Rap has authoritative bass, and classic rock and hard rock has beautiful balance, timbre, and detail retrieval. For $25.00, with the $7.00 Tingo...

It might be your dap? Or maybe you're right, and there's a bad tuned batch? When it's such a small sample size of negative aural observations, then you have to wonder?

Not many. Just a couple. A handful. Less than 10. Maybe less than 5, so let's not try and be a one man rain on parade. The 4in1 are superb earphones at any price.

The FX750 bass is very bloomy. It's the weak spot for that particular earphone. The FX850 on the other hand, has a more controlled bass, delicious highs, and the most enchanting timbre on planet earth. The only earphone I've come across (and I've tried close to 100) with remotely similar timbre...

I haven't read so much divisiveness in this forum probably ever? It's quite alarming reading so much bitterness. Because what? A few bit on highly regarded earphones and they turned out to disappoint you? Listen, I recently ordered the DQS* D2***, LZ-A2, and LZ-A3s because they were recommended...

Also the E80 sounds like a slightly fuller single BA, but with no sibilance. The highs are just shy of sparkly because the warm tilt tuning keeps them from creeping into this territory. It's ability to dig up details is above average, but clarity is average, so you will hear the micro details...

The E80 have solid bass response and a wide soundstage if amped. They play very similar to the HAVI's (except less soundstage), and like the Havi, need an amp to be at their best, so not the most mobile choice.