After a good 48 hours of listening on and off - this DAP is a keeper and my new favorite.
This (hopefully) ends my long search for a DAP to for my 64 Audio A18 I purchased about a year ago.
I think most would agree that the AK interface and Tidal integration is top notch. While Tidal offline isn't crucial for me, I know it is for some - and I've read AK is updating firmware eventually to include this. Outside of the boot loop I had - and the premature temper tantrum - I have always loved the interface of AK devices.
From a sound signature perspective, coming from the DX200 Amp 4, I initially felt the SE100 was slightly bass shy. After further listening - and comparisons back and forth - I felt like the DX200 Amp 4s mid bass was muddying up the mids slightly - and I came away preferring the sound signature of the SE100. While we often ask what neutral actually is, the SE100 strikes me as incredibly well balanced throughout the frequency spectrum. I think the treble stands out vs. other DAPs not because it's too much, but because the extension does justice to the 64 A18 and it's Tia drives. The mids are spot on, and I am noticing more texture and detail in the bass - which I didn't really think Balanced Armatures could do. The bass quality approached some of my full size headphones.
I have been through many a DAP in the past year, and hear is my order of preference and why. Please note, I am not considering price at all in the equation - this is purely my subjective opinion with the 64 Audio A18t.
I have owned each of these DAPs for at least 30 days, and have either sold, returned or kept. Currently I have the SE100, AK240 and DX200. I may put the DX200 amp 4 for sale - but may keep as a portable for full size headphones as it handles them the best of any DAP I've tried - and the Pops and Clicks detailed below are less of an issue due to higher impedance and lower sensitivity.
This ranking, however, specifically considers pairing with the 64 Audio A18t. You may have a different opinion with your IEMs, or you may have a different opinion with the A18. Opinions are entirely subjective. That said, I believe the A18 is quite neutral so is a good reference to test DAPs, and comments not applicable to sound signature are more universal.
1. AK SE100
+ Checks all the boxes. UI is great, storage is good, and battery life is very good. Tidal integration is super smooth. Sound signature matches perfectly with my tonal preferences and the A18.
- Wish AK added more internal storage outside of their flagships, but I guess they need a way to differentiate. I don't need a full android interface, but would like to easily listen to podcasts on a DAP - so I could use one device for everything.
2. AK 240
+ Sound signature is very musical with A18 and still holds up quite well today, but I think the SE100 is superior. While the interface isn't quite as good as AK's new version - AK's old interface is still better than most other DAPs. As it was an AK flagship - love the 256 GB of internal storage. Battery life's is good, and it's probably got the best form factor of any DAP given it's size and storage.
- While the Tidal integration is smooth from a UI standpoint, I get odd background noises from Wifi.
3. Opus #2
+ Sound signature is very good, might be slightly bright with my A18t - but I enjoy it alot. Interface is generally smooth and bug free. Battery life is good and storage is good as well.
- Tidal Integration (at least when I had it) was kind of clunky, as you couldn't quit Tidal unless you restarted the player. All in all a very strong DAP.
4. DX200 Amp 4
+ I go back and forth between SE100 in terms of the sound signature I prefer most. Regardless, the DX200 in general has excellent sound - and can be tweaked extensively given all the Amps included. It has a full android experience, and Lurker's firmware let's you get the most out of the device. Plays really well with power hungry full size headphones. Best portable sound for my Audeze Sine.
- UI is the poorest of any DAP I've used. While it's sped up somewhat in recent firmware updates, look, feel and speed are sub par. Battery life, especially with high-powered Amps is low. Internal storage is only 64gb and lags when playing high sample rates and DSD. POPPING and CLICKING drive me absolutely insane and constantly make me concerned I will damage my headphones or my hearing; this is especially evident with high sensitivity low impedance headphones like the 64 Audio A18. In the native app things got better for a while, but in the most recent firmware they are worse. While it's cool to have tidal and offline, as well as podcast apps (or music player of choice) - I get loud pops and clicks when starting and stopping tracks, every time, in any 3rd part apps.
Amp 4 is a great amp, but all the 4.4 mm I've tried require spacers to work with the jack. This is an easy fix but a bit clunky.
All in all, DX200, from a sound quality perspective, punches well above it's weight - but I wish IBasso would work on software a bit more. User Interface / Experience is my least favorite of any DAP I've tried.
5. Sony WM1A
+ Sound signature is good, but not exceptional IMO. Batttery life is outstanding, and interface is second only to AK's new interface in performance (and beats AK's old interface IMO). Storage is good.
- No wireless of any kind is a bit of a miss to me. I know Sony claims that this is to focus on sound quality, but there are plenty of other DAPs, IMO, with superior sound quality - which get streaming right. 4.4 MM input works perfectly, unlike DX200 - however it's a pain to have to use an adapter or get a 4.4 MM cable to get the most out of this thing (and it's the only way to get DSD).
6. AK SP1000
+ Similar to SE100 great interface, battery life, great storage capacity - and flawless tidal integration (unless you want offline).
- I just don't like the sound signature on this one. It sounds overly dry and is boring too me. Caveats apply: This is my opinion with one CIEM with multiple cables and other attempted sound tweaks over the course of 30 days (was returned). Soundstage is good, but tonality sounds off. Very big and very heavy for portable use.
7. Sony WM1Z
+ Sound signature is good as well, but my preferences lean toward the WM1A. All other positives with the WM1A stand.
- Same negatives as WM1A. Additionally, it's a freaking brick that is heavy as hell and hard to carry around for portable use.
8. Fiio X7ii
+ Sound signature is ok, but only superior to SP1000 in my estimation. Perhaps slightly bass shy, and doesn't do a lot wrong, just mediocre IMO. Full Android experience similar to DX200 and is able to handle 3rd party apps better than DX200. Interchangeable amp modules to tweak sound.
- Still some clicks here and there, but much lower in volume and liveable.