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SMSL DL400

What is the difference between the DL400 and the DO400?
I haven't owned the DO400, but according to the manufacturer's information, the only difference in features is that the DO400 has an XLR headphone output and the DL400 doesn't. The rest is all aesthetics, different shape and different display. Although I think the DO400 can't display information on the track played with Bluetooth connection while the DL400 can (although in my case so far I've only been able to view the song title and the fixed duration bar with AAC and APTX protocols)
 
I haven't owned the DO400, but according to the manufacturer's information, the only difference in features is that the DO400 has an XLR headphone output and the DL400 doesn't. The rest is all aesthetics, different shape and different display. Although I think the DO400 can't display information on the track played with Bluetooth connection while the DL400 can (although in my case so far I've only been able to view the song title and the fixed duration bar with AAC and APTX protocols)
Also, apparently, the Loxjie D60 (for less money).
 
I tried to create a new thread under DACs for this, but it wouldn't let me do so. Anyway, here are my first impressions of the Loxjie D60, which arrived yesterday.


TWO STEPS FORWARD, ONE STEP BACK

First, the good news ...

What I immediately noticed when I plugged in the D60 and played a track on Amazon Music Unlimited was the obvious improvement over the same track being played back on my old DAC (the original Loxjie D40 with the latest firmware update). To me, it sounded like the D60 increased the ambiance and added SLIGHTLY more depth and width. I was able to better pick out individual instruments in the mix.

What it did not do is make tinny or hard-to-hear movie dialog sound any clearer or compensate for badly mixed or badly recorded music as you might try to do with eq. (Though Amazon Prime Video's "Audio Boost" seems to be getting better these days.) As for the filters and sound colors ... well, as always, I suppose some people will say that they can't hear differences between them. I actually was able distinguish some very subtle differences. I just didn't find any of them useful for fixing subpar audio.


Now, the bad ...

I really hate the new UI and display. My D40 has a much smaller screen, but it is easier to read. I have the D60 and my powered speakers on top of my dresser, next to my Roku Ultra, under a wall-mounted TV. With the D40, I could see everything in nice, bright, white letters and control just about every function with the Loxjie remote. The D40 also has a small green LED that illuminates when the device is on and a red LED when it's off. The D60 has only the red LED for when it is off if you have set the display to dim after changing settings. The Normal mode has far too much information on it to be visible from a comfortable TV viewing distance. They are too small for me to see on many of the D60 screens unless I walk right up to them and put on my reading glasses. The Simple mode is hard to read because all the text is in these big blocky characters reminiscent of the cheapest pocket calculators from the early 1970s -- which might look cool to some people, but are actually hard to distinguish because the characters and numerals look so much alike. Furthermore, all but the lowest brightness levels seem to cause a distracting amount of background light to spill through the screen when viewed in a dark room.

I'm not saying that some won't like this style. I'm just saying that, if Loxjie wanted to make a bold aesthetic choice (or trick users into thinking they were using a Topping product) they should have at least included an alternative look for those that don't like it (or who have visual impairments). There should be at least one font that was picked for its clarity and visibility. (I used to see this kind of thinking a lot in my sideline of software development, when a developer would not allow for a reasonable amount of flexibility with the user interface. People have different personal preferences and ways of working. If you force them to use only one UI, you are just limiting your potential customer base. Not a good approach to take in a crowded DAC market, IMHO.)


Finally, I would like to ask for suggestions on how to fix a nagging problem that none of my Loxjie DACs (the D30, D40, and D60) were able to address ...

There are a few recent albums that have distortion on nearly every track when streaming through Amazon Music Unlimited (though the amount of the distortion differs from track-to-track). For example Robyn Adele Anderson "Just Play the Right Notes" and "Expensive Background Music". To me it sounds like the cheapest portable transistor radio from the 1960s playing the same track simultaneously with the hq digital feed. Both my systems play most other songs and albums without distortion. I am assuming that either the issue exists in the recordings themselves or somewhere else in my systems, but don't know what to change. (Different DAC filters and sound colors in the DACs don't help. It seems like increasing the DPLL value does to some extent -- but I am NOT going to get into another argument about that becasue so many people are convinced that it's impossible and no one has suggested an alternative.) Any ideas? Thanks.

The signal paths on my systems are as follows:
  • LAN cable to Roku Ultra - Roku Ultra to TV via HDMI - TV to D60 via optical cable (at 480) - output to 3.1 Genelec powered speakers
  • Wi-fi signal to iPad mini - iPad mini to D40 via USB (at 192) - output to 2 Genelec powered speakers
All suggestions are welcome. Thank you.

MORE ...

Okay, I think I'm finally getting to the bottom of this problem, which is now affecting both my audio (D40) and my video (D60) systems.

First of all, there definitely seems to be some issue with the streaming content, because it is happening on both systems and it occurs only on some titles. I have re-enabled the Amazon option to adjust the quality of the audio to compensate for poor connection speeds, but thusfar this has not made a difference.

Secondly, it now looks like there is a fault in one of my Genelec powered speakers (in the audio system). The volume on one speaker is noticably lower than the other. I verified this with audio from my CD player (to rule out streaming issues) and then swapped both speakers out with a pair of Genelec G ONEs. I can compensate for the volume issue by going back to the original speakers and raising the volume of the speaker that is causing the problem, but I decided to have the faulty speaker repaired instead.

EDITED - It's two days before Thanksgiving and wi-fi around here is spotty. I've never seen it this bad before. So, I really can't trust any of the conclusions I made earlier, before I was aware of this issue. I will have to test it again, after the holidays, to be sure.
 
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MORE ...

Okay, I think I'm finally getting to the bottom of this problem, which is now affecting both my audio (D40) and my video (D60) systems.

First of all, there definitely seems to be some issue with the streaming content, because it is happening on both systems and it occurs only on some titles. I have re-enabled the Amazon option to adjust the quality of the audio to compensate for poor connection speeds, but thusfar this has not made a difference.

Secondly, it now looks like there is a fault in one of my Genelec powered speakers (in the audio system). The volume on one speaker is noticably lower than the other. I verified this with audio from my CD player (to rule out streaming issues) and then swapped both speakers out with a pair of Genelec G ONEs. I can compensate for the volume issue by going back to the original speakers and raising the volume of the speaker that is causing the problem, but I decided to have the faulty speaker repaired instead.

EDITED - It's two days before Thanksgiving and wi-fi around here is spotty. I've never seen it this bad before. So, I really can't trust any of the conclusions I made earlier, before I was aware of this issue. I will have to test it again, after the holidays, to be sure.
Okay, once I addressed the side issues (a bad speaker on some of my earliest tests, a poor wi-fi signal for a while, and finding the best DPPL settings to deal with dropouts, I was still left with distortion on some tracks when they are streamed from Amazon Music Unlimited (regardless of the quality setting on Amazon). I was able to fix it to the point where the tracks were at least listenable (i.e. my ears weren't focusing on the distortion more than anything else) on my Loxje D40 by using the FL3 filter settings. I improved this a bit by using Sound Color 3 to restore some of the high frequencies without adding distortion.

Unfortunately, I have not been able to replicate it on the D60 (which, ironically, has a newer DAC chip and more filters and sound colors to choose from). The Minimum Phase, Minimum Slow, and Low Dispersion do seem to be better than the others at reducing the distortion (which I now believe is due to a phasing issue) -- but not as convincingly as the D40. The Sound Colors seem to change the amount of ambiance (echo, delay, or whatever FX they are using to simulate room tone) but don't do much to correct or cover up the phasing problems.

If anyone has had better luck with this, I am hoping that they will post their experiences here. Thanks.
 
Totally agree, it is one of the reasons why I decided to buy it, although the display is too bright even at minimum in my opinion, but you end up getting used to it.
The Loxjie D60 has a "Dimmer" menu setting. You select the number of seconds and the whole display goes dark if you go for that amount of time without making a selection. I found that this works for me. Perhaps there is some setting on the DL400 as well?
 
The Loxjie D60 has a "Dimmer" menu setting. You select the number of seconds and the whole display goes dark if you go for that amount of time without making a selection. I found that this works for me. Perhaps there is some setting on the DL400 as well?
Yes, the DL400 has this option too, countdown for display shutdown (dimmer) and brightness level, but i like display Itself always on, although a little less brightness would not have been bad.
 
Yes, the DL400 has this option too, countdown for display shutdown (dimmer) and brightness level, but i like display Itself always on, although a little less brightness would not have been bad.
Yes. Too bright on the Loxjie version, as well.
 
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I recieved DL400. Looks very nice
 
It'd be very nice if someone could take a picture of its circuits.
 
Loxjie asked me to write a review for the D60 shortly after I received it. I sent them a copy of my post above ("TWO STEPS FORWARD, ONE STEP BACK") and they still haven't run it. Maybe they didn't like what I said. Not cool.

I'd reccomend the D40 Pro for the better LCD sreen. Or better yet the DL400 or one of the other SMSL DACs in this price range. From what I understand, all those that use the latest SMSL chip have less "glare" that the previous models, so my guess would be that they all sound pretty much the same. But IMHO, they really dropped the ball with the UI in the D60 and my guess is that they didn't do much usability testing before it was released.
 
Hi!!

I've been listening for a while through the DL400. The sound is crystal clear as I expected, especially when I listen to it through my Sennheiser 560S headphones, I find new details that I didn't hear before, but it doesn't make bad recordings sound better, hehe.
With my main speakers, Yamaha HS80M, I may hear too much bass, but that will be due to the acoustics of my room and the Yamahas themselves (I'm now trying with the Room Control selector at -2db... better).
During playback you don't hear pops or clicks when changing tracks even though they have different sample rates, but you can notice a small silence when changing to tracks with different sampling rates that makes you lose a few tenths of the track.
The volume control has a good feel and is separated by steps. The simple and intuitive menus, being represented by icons, allow the selection of sources and outputs from a considerable distance. The display looks great.

There isn't much more information about this DAC on the net, if anyone has any questions maybe I can help ;)

Regards!!
 
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Thank you for your report. I have a question.
Why did you choose this, why not dl300?
Hello Csaba!

I was comparing all the SMSL DACs with pixel display and headphone output. I was determined to buy the RAW-MDA1 which had these features and a good price.
Then the DL400 came along which had the same features but with a bigger display, better DAC chip and a nice shape.

I started evaluating the ones in the same category but a bit more expensive and there was the DL300, with AKM chip.
On paper the DL400 has better features, more powerful headphone amplifier, a bigger display with more elegant text fonts, possibility to display the title of the songs if using Bluetooth connection and an overall shape that I like more.

Considering that according to the measurements of Amir and other forum members, the differences in performance of an ESS chip or an AKM are practically inaudible, I ended up deciding on the DL400.
Although I have to admit that a DAC with the features and appearance of the DL400 but with AKM AK4191+AK4499EX would have been very serious consideration for me.

Regards!!
 
Hi, Rastofer,
Thank you for your detailed answer. I am particularly interested in the highly praised musicality of the AKM chips. And I'm more careful with ESS chips. Actually, I have little experience in this matter.

Best regards
 

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DO400 vs DL400 (DO300ex/DL300)
There are some false statements made in the past.

Correct is that the devices have very much the same base which can be seen when having a look at the measurements made by SMSL themselves.
Could be said this is just the difference because of series scatter but maybe to the little differences made in the models.
The DL400 is very much a new revision.

Complete overhaul of the device design. Though it reminds me of models from the past.
-New (bigger) Display with new UI.
-DL400 lacks the XLR port which might be a dealbreaker for some. But most users should be fine
-DL400 got updated USB-Port (Finally USB-C after 1000 years)
-the backside with the audio inputs/outputs is redesigned/rearanged > But exact same ports are present.
-the power sections looks to me as a new revision either but maybe it´s just the photos.
-changes in HPA section > 127db vs 126db (VERY minor update)
- HPA High gain clearly changed +9.5/+15.5 db vs +14/+20 db
-DL400 casing is bigger which results in 290gr more weight. If you need the smaller footprint DO model is the way to go.
-DL400 has better (looking like real Hifi feet) device feet

The DO300ex/DL300 is a strong cut down in my eyes.
HPA is the biggest drawback > 6W vs. 2W or 3W vs. 1W
That resulted in the DO300ex unable to power some headphones the 400s models do much much better.
It is told to lack control of headphone drivers on some headphones. So if your headphone isn´t told be driven easily there is a risk you let go of some headphone performance.
No Balanced design!!!
DL300 lacks the newer/bigger display and does not have the newer UI.

I would have loved to have the choice between AKM and ESS chips but there are only models big HPA with ESS chips.
 
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