Comments on: US$69 JWD JWM-115 DSD Lossless Portable Music Player Review – Hits And Misses

By: CqTek

CqTek — Wed, 11 Mar 2020 16:51:34 +0000

KopiOkaya, I appreciate your answers.

-The battery problem must be in my unit.
– The power issue, now that you mention that the M0 compares it to low gain, is much more understandable to me.
– The firmware version is the same as my unit.

Greetings and thanks for responding.

By: KopiOkaya

KopiOkaya — Tue, 10 Mar 2020 22:34:11 +0000

In reply to cqtek.

To answer your questions:

– I have yet to encounter sudden battery power depletion issue. Mine could drain all the way beyond 40% without any hiccup. Also, the battery gauge on mine seems accurate.

– My Shanling M0 and the JWM-115 have very similar power output… Of course, unless I switch my M0 to “High Gain” mode, then the latter is more powerful (by 10-20%). The output from my JWM-115 is more than enough to drive most of my headphones (including Sennheiser HD600) to deafening volume.

– I asked JWD about firmware. They told me there isn’t a new firmware update so far. Mine operates on version 1.26.

By: cqtek

cqtek — Tue, 10 Mar 2020 17:29:34 +0000

Hello.
I apologize for staining your review with numbers. I thought I was asking a simple question, about the power of this device. It wasn’t welcome, all right. I was just curious.
On the other hand, your comment about the T1 thread on Head-fi.org was the first I’ve heard about it. You’re free to comment on that.
I got the message.
Greetings.

By: KopiOkaya

KopiOkaya — Tue, 10 Mar 2020 03:01:17 +0000

In reply to CqTek. I don't mean to pick on you. Remember IcedFrosty from Zishan T1 thread? I was his immediate contact between him and Zishan. The thread got so technical and so confusing until nobody bother to go there anymore. I do not wish to see Audioreviews.org ended up like that!

By: Jürgen Kraus

Jürgen Kraus — Tue, 10 Mar 2020 02:11:52 +0000

Heyhey,
Hold the horses…I will come with numbers for the Hilidac Atom Pro soon…albeit a bit simpler.

By: KopiOkaya

KopiOkaya — Mon, 09 Mar 2020 22:33:40 +0000

You come to the wrong blog… You should visit Audio Science Reviews forums instead… Here at Audioreviews.org, we only care about good sound, not numbers.

By the way I read your post on Head-Fi in regard to both Zishan T1 and Zishan DSD. You, among others, had literally turned that perfectly pleasant discussion forums into an academic science journal, which none of us common folks and laymen understand or care. Only NASA scientists go there now. You got my point? Therefore, please keep your numbers and measurements elsewhere!

By: CqTek

CqTek — Mon, 09 Mar 2020 15:20:52 +0000

I recently analyzed this DAP and also found it very good for its price. But I have doubts in two aspects that you put right: The life of the battery and the power.
My battery seems to be badly calibrated, when it goes below 40%, it suddenly drops to a value close to zero and then shuts down. It may be some defect…
On the other hand, the power is low. These were my measurements:

No-Load 0.679V
16 Ω –> 0.674V –> 28.39mW
32 Ω –> 0.674V –> 14.2mW
100 Ω –> 0.677V –> 4.58mW
240 Ω –> 0.678V –> 1.92mW
320 Ω –> 0.679V –> 1.44mW

I’m struck by the fact that you compare it to the M0, which is much more powerful… Will my unit be different? What version of firmware are you using?

Greetings and congratulations for your review.