johny_2000
Senior Member
Dude, 0.5m is way longer than what I'm looking for. I need about 10cm.
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Topping D50 III Balanced DAC with EQ Review
- Thread starter amirm
- Start date
JDS Labs has the stuff.
JDS Labs 3.5mm Interconnect Cable _ Shop JDS LABS
Stereo 3.5mm to 3.5mm interconnect cable. This no-frills cable connects your audio source to any analog or auxiliary input.
jdslabs.com
Ultra Short 3.5mm Interconnect Cable _ Shop JDS LABS
An ultra short 3.5mm interconnect cable, perfect for connecting portable audio devices.
jdslabs.com
herr.jemine
Active Member
JDS Labs has the stuff.
JDS Labs 3.5mm Interconnect Cable _ Shop JDS LABS
Stereo 3.5mm to 3.5mm interconnect cable. This no-frills cable connects your audio source to any analog or auxiliary input.Ultra Short 3.5mm Interconnect Cable _ Shop JDS LABS
An ultra short 3.5mm interconnect cable, perfect for connecting portable audio devices.
But these are 3.5 stereo, does this also work as a trigger cable - which are otherwise mono..
20cm mono trigger-cable:
A stereo 3.5 mm cable has the tip and ring of a 3.5 mm mono cable but it has a extra ring for one channel. So it will work. What kind of current do you plan on putting through the cable?
DantonIzzo
Member
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I have an extra one. If you dm me your address I’ll mail it to you.
15cm/ 5.9" (5 pack) $9 USD
Could also make you're own if you want.
Could also make you're own if you want.
johny_2000
Senior Member
Thanks everyone! I found one at JDS Labs. It's already on order.
JDS Labs 3.5mm Interconnect Cable
Length = 3in (8cm)
I hope it's not too short. I'll let everyone know when I get it.
P.S. It's stereo, but that doesn't matter in this case since only the tip and sleeve are used to control the trigger jack.
JDS Labs 3.5mm Interconnect Cable
Length = 3in (8cm)
I hope it's not too short. I'll let everyone know when I get it.
P.S. It's stereo, but that doesn't matter in this case since only the tip and sleeve are used to control the trigger jack.
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They might be, I have these for my D50s & A50S stack, and at 6" they are verging on to short.
Stack RCA Cables _ Shop JDS LABS
These are the RCA Interconnects you've been looking for! Ultra short length, premium gold-plated connectors, and custom cabling which holds its shape.
jdslabs.com
Perhaps the thinner cable will be more flexible for you.
MrHifiTunes
Active Member
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Is the topping tune firmware upgradable to newer versions with more functions( eg. split eq for each channel)
Or is this technically impossible and do they need eg. 2 dac chips
Or is this technically impossible and do they need eg. 2 dac chips
Last edited:
johny_2000
Senior Member
Does anyone know what a Source Frequency Response file is and what it's purpose is?
I was able to load some Harman OE Target curves from autoeq library .csv files. This one works.
I was able to load some Harman OE Target curves from autoeq library .csv files. This one works.
staticV3
Grand Contributor
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Probably just the raw headphone response curve, in either .txt or .csv format.
johny_2000
Senior Member
Thanks for the idea! You know there are translation difficulties with these devices and their software/manuals. I'm going to try it with the raw HD650 frequency response file.
But honestly, it's not that bad for a first release of Topping's EQ software. I'm sure they'll fix some bugs and expand the functionality in future versions, as they're marketing it for their high-end line of devices.
johny_2000
Senior Member
Today I measured the A50 III in combination with the D50 III and the amp does not add any additional distortion to the combined output.
Still the same 125 dB SINAD @ M Gain @ 300 Ohms @ BAL IN/OUT.
Unfortunately, I found that the D50 III is sensitive to ground loop noise. When directly connected to a PC, the noise floor is higher with some unwanted spikes (like PC fans PWM), the H2 level is higher, and the SINAD is lower by 3 dB. When driven by a battery powered laptop -> everything is fine. This made me think about USB isolators.
Some of them seem to be overpriced, and others don't have enough power to provide 5V 500mA output devices at least.
I checked the following devices:
JDS Labs Synapse -> not enough power (100 mA max).
Topping HS02 -> cost $110 (Shipping+Taxes)
Hifime High-Speed USB Isolator v2 -> don't know if I can trust its specs to power devices with 500mA.
Still the same 125 dB SINAD @ M Gain @ 300 Ohms @ BAL IN/OUT.
Unfortunately, I found that the D50 III is sensitive to ground loop noise. When directly connected to a PC, the noise floor is higher with some unwanted spikes (like PC fans PWM), the H2 level is higher, and the SINAD is lower by 3 dB. When driven by a battery powered laptop -> everything is fine. This made me think about USB isolators.
Some of them seem to be overpriced, and others don't have enough power to provide 5V 500mA output devices at least.
I checked the following devices:
JDS Labs Synapse -> not enough power (100 mA max).
Topping HS02 -> cost $110 (Shipping+Taxes)
Hifime High-Speed USB Isolator v2 -> don't know if I can trust its specs to power devices with 500mA.
somebodyelse
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That's an inherent risk when using RCA interconnects. When using TRS it should be immune unless they've implemented it badly.
johny_2000
Senior Member
I am using 6" TRS cables and the unit is in BALanced mode. This is not common mode noise, but some sort of ground loop noise.
somebodyelse
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Balanced is immune to ground related noise issues when correctly implemented, which is why I asked. It's the main reason to use balanced interconnects in a domestic setting as interference isn't usually a significant problem there. It seems Topping didn't implement it correctly, which is disappointing and worth knowing. Or one of your units is faulty, or they're vulnerable to a different interference path that just sounds like a ground noise issue.
johny_2000
Senior Member
johny_2000
Senior Member
Yes
johny_2000
Senior Member
You were right!
I loaded the HD650's raw frequency response curve into the 'Source FR' tab and it showed up on the graph with the Source FR slider enabled.
This also changed the shape of the Filtered FR curve to a "Raw headphones + Combined filter" curve.
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