• WANTED: Happy members who like to discuss audio and other topics related to our interest. Desire to learn and share knowledge of science required as is 20 years of participation in forums (not all true). Come here to have fun, be ready to be teased and not take online life too seriously. We now measure and review equipment for free! Click here for details.

Amir's TODO thread

OP
amirm

amirm

Founder/Admin
Staff Member
CFO (Chief Fun Officer)
Joined
Feb 13, 2016
Messages
26,710
Likes
62,425
Location
Seattle Area
Thread Starter #241
I think what he meant was, what is the current turnaround time with your current backlog. Like do you have months and months of loaned items ahead of you to address before you can start working on something new?
Little hard to tell at the moment. I have been ill for the last few weeks and at the same time got a ton of gear to review both in person and through mail. The disease is progressing toward the end but unfortunately it is extremely uncomfortable and gets worse when sit at my desk. If I had been healthy i could have gone through a lot more gear by now.

Once I get better I can get a better idea of throughput. For now, I say I have a few weeks worth of gear to test.
 

Guermantes

Senior Member
Joined
Feb 19, 2018
Messages
383
Likes
393
Location
Brisbane, Australia
Glad to hear you are on the mend, Amir. Health is your no.1 priority.
 

Dismayed

Active Member
Joined
Jan 2, 2018
Messages
202
Likes
137
Location
Boston, MA
Little hard to tell at the moment. I have been ill for the last few weeks and at the same time got a ton of gear to review both in person and through mail. The disease is progressing toward the end but unfortunately it is extremely uncomfortable and gets worse when sit at my desk. If I had been healthy i could have gone through a lot more gear by now.

Once I get better I can get a better idea of throughput. For now, I say I have a few weeks worth of gear to test.
Don’t push yourself if you are feeling ill! I’m not in a hurry to get my amp back.
 
Joined
Feb 17, 2018
Messages
8
Likes
4
Little hard to tell at the moment. I have been ill for the last few weeks and at the same time got a ton of gear to review both in person and through mail. The disease is progressing toward the end but unfortunately it is extremely uncomfortable and gets worse when sit at my desk. If I had been healthy i could have gone through a lot more gear by now.

Once I get better I can get a better idea of throughput. For now, I say I have a few weeks worth of gear to test.
Alright, I'll wait for when you are nearing the end of your backlog.

Not sure how much demand there is for the Topping NX4 DSD, but if it measures well, it seems like a good alternative to Topping DX7s for the following reasons:

1) Same DAC chip (just one instead of two) and supports same formats (up to DSD512, 32-bit 768KHz)
2) Low impedance amp chip at<0.4 ohms (not sure what the model is, but it's probably cheap)
3) Portable
4) At least $200 cheaper

I have yet to hear a significant improvement from my PC's onboard audio, so I am curious what the measurements say.
 
OP
amirm

amirm

Founder/Admin
Staff Member
CFO (Chief Fun Officer)
Joined
Feb 13, 2016
Messages
26,710
Likes
62,425
Location
Seattle Area
Thread Starter #245
Not sure how much demand there is for the Topping NX4 DSD,
I have heard a lot of requests for it so it is definitely in demand and something I like to test.
 

dc655321

Addicted to Fun and Learning
Joined
Mar 4, 2018
Messages
620
Likes
592
I have heard a lot of requests for it so it is definitely in demand and something I like to test.
I won't have my NX4 DSD in hand for a few weeks yet. Perhaps someone is swimming it over from Guangdong... :-(
At any rate, I'm hopeful this little beauty sounds _and_ measures well.
 

iridium

Addicted to Fun and Learning
Joined
Feb 28, 2016
Messages
525
Likes
108
Little hard to tell at the moment. I have been ill for the last few weeks and at the same time got a ton of gear to review both in person and through mail. The disease is progressing toward the end but unfortunately it is extremely uncomfortable and gets worse when sit at my desk. If I had been healthy i could have gone through a lot more gear by now.

Once I get better I can get a better idea of throughput. For now, I say I have a few weeks worth of gear to test.
Allergy season around the Puget Sound; trees are very active.

iridium.
 
OP
amirm

amirm

Founder/Admin
Staff Member
CFO (Chief Fun Officer)
Joined
Feb 13, 2016
Messages
26,710
Likes
62,425
Location
Seattle Area
Thread Starter #248
Allergy season around the Puget Sound; trees are very active.

iridium.
I wish it was allergies. This thing has been like going to hell and back a dozen times! I might make a new thread and explain.

But yes, allergies are terrible. My car has yellow dust on it!
 

stunta

Addicted to Fun and Learning
Forum Donor
Joined
Jan 1, 2018
Messages
812
Likes
818
Location
Boston, MA
I see the miniDSP on your list. Any estimate on when that might get reviewed?

Get well soon! Your forum needs you! :)
 

RayDunzl

Major Contributor
Central Scrutinizer
Joined
Mar 9, 2016
Messages
9,296
Likes
7,319
Location
Riverview FL
There was an ominous warning saying the coupon can only be redeemed once. I think I went there a second time and it still let me download it.
You probably registered an account with them to redeem the coupon. Don't forget your login...

You should be able to download whatever is registered to you (including new versions/updates).

Hover over your login name, top right, click the drop-down menu item "User Downloads"

Many products listed, only the ones you "own" will flesh out with a download button when you look at them.
 
Joined
Feb 17, 2018
Messages
8
Likes
4
I have heard a lot of requests for it so it is definitely in demand and something I like to test.
Then I will be waiting for you to get through your backlog, or for someone else to send you the Topping NX4 DSD first. Send me a message when either happens. My name is easy to remember because I was very creative.
 
OP
amirm

amirm

Founder/Admin
Staff Member
CFO (Chief Fun Officer)
Joined
Feb 13, 2016
Messages
26,710
Likes
62,425
Location
Seattle Area
Thread Starter #252
Then I will be waiting for you to get through your backlog, or for someone else to send you the Topping NX4 DSD first. Send me a message when either happens. My name is easy to remember because I was very creative.
That you were. :)
 

dc655321

Addicted to Fun and Learning
Joined
Mar 4, 2018
Messages
620
Likes
592
I have heard a lot of requests for it so it is definitely in demand and something I like to test.
Got a little surprise in the mailbox yesterday: my Topping NX4 DSD arrived!

Listening through my HD6xx, it sounds nice. Nothing audibly wrong that I notice.
Low gain setting, about 1:00 on the volume dial.

However, here is an excerpt from a message I sent to the retailer I purchased this device from:

I had a brief opportunity to listen to the device last night.
I noticed that there is a substantial channel imbalance at low volume.
From approximately 7:30 on the dial until 9:30, the right channel is much louder than the left.
This balances out by 10:00 on the dial, but that is already at significant volume for my sensitive IEMs (FLC8S).
Also, there is hissing audible on high gain with no input present (noticed with IEMs).

That's a little disappointing. To be fair, I don't intend to use the NX4 for use with my IEMs.
 

dc655321

Addicted to Fun and Learning
Joined
Mar 4, 2018
Messages
620
Likes
592
Yeh, that is not so good given the application.
I don't notice it on the HD6xx, but they have ~300 Ohm impedance.
The FLC8S are about 11 Ohm and are quite sensitive (~107 dB/mW).

Still... point taken. Not a good thing.
 
OP
amirm

amirm

Founder/Admin
Staff Member
CFO (Chief Fun Officer)
Joined
Feb 13, 2016
Messages
26,710
Likes
62,425
Location
Seattle Area
Thread Starter #256
HD-650 is the least sensitive headphone I have with respect to hearing noise. Indeed I don't hear hiss with it at all with gear that produces it. My AK IEMs are most sensitive. For regular headphones I think the Sony MDRV6 was also sensitive enough to pick up noise.
 
Joined
Feb 17, 2018
Messages
8
Likes
4
Got a little surprise in the mailbox yesterday: my Topping NX4 DSD arrived!

Listening through my HD6xx, it sounds nice. Nothing audibly wrong that I notice.
Low gain setting, about 1:00 on the volume dial.

However, here is an excerpt from a message I sent to the retailer I purchased this device from:

I had a brief opportunity to listen to the device last night.
I noticed that there is a substantial channel imbalance at low volume.
From approximately 7:30 on the dial until 9:30, the right channel is much louder than the left.
This balances out by 10:00 on the dial, but that is already at significant volume for my sensitive IEMs (FLC8S).
Also, there is hissing audible on high gain with no input present (noticed with IEMs).

That's a little disappointing. To be fair, I don't intend to use the NX4 for use with my IEMs.
I confirm this problem with my unit as well. 45% volume on the NX4 is not too bad as I'm still setting the volume in software to about 75% or higher.

Resampling everything to 32-bit, 768 KHz sounds a bit worse than native rate, although I don't really know what the best settings would be for Resampler-V.
 

dc655321

Addicted to Fun and Learning
Joined
Mar 4, 2018
Messages
620
Likes
592
I confirm this problem with my unit as well. 45% volume on the NX4 is not too bad as I'm still setting the volume in software to about 75% or higher.
What source(s) and sink(s) are you using for listening?

I always set the software volume at 100%, more out of habit than anything else.
 
OP
amirm

amirm

Founder/Admin
Staff Member
CFO (Chief Fun Officer)
Joined
Feb 13, 2016
Messages
26,710
Likes
62,425
Location
Seattle Area
Thread Starter #260
What do you think about Audio-GD R2R 11? This dac/amp is very popular right now.
It is but no one has offered yet to loan it to me for measurements. If you run into an owner, please try to convince him to loan it to me for testing. :)
 
Top Bottom