TOPPING DX9！

[LETRA]

Just to note that I replaced the fuse in the Topping DX9 with a Synergistic Research Purple Fuse Slow-Blow 20mm 1A, and the level of detail I've obtained from the very first moment, without any burn-in, is simply amazing. If anyone is skeptical, try buying it at a store with a return policy or come listen to it at my house. Simply impressive.

That's it.

 

[oleg87]

Fuse talk on ASR? No words.

 

[Veri]

Yes well I learn a lot here, but I also wanted to contribute, you see, what ASR really seemed to lack was

a talk about purple or orange fuses! I'mma hold off buying those. I'm sorry, man.

 

[pinger]

Yes well I learn a lot here, but I also wanted to contribute, you see, what ASR really seemed to lack was

a talk about purple or orange fuses! I'mma hold off buying those. I'm sorry, man.

Its getting silly now. I guess though this is how magazines like Stereophool stay in business

 

[Bl00dWolf]

I asked Topping for clarification regarding the same situation as with the DX5 II, but for the DX9.
I asked if it was possible to connect headphones to different outputs at the same time, and whether this would cause any damage.

Hello,

Thank you for contacting TOPPING support. We are happy to assist.

According to the design of the DX9, you can confidently connect multiple headphones simultaneously. The single-ended (e.g., 6.35mm jack) and balanced (e.g., 4.4mm and XLR jack) headphone amplifier circuits are completely independent and do not interfere with each other.

Please let us know if you have any further requests about TOPPING products.

Best Regards,
Topping

So I'm using DX9 with IEM ZERO2 or Nova via 6.35 and NOIRE X via 4.4 simultaneously.

 

[Roland68]

I asked Topping for clarification regarding the same situation as with the DX5 II, but for the DX9.
I asked if it was possible to connect headphones to different outputs at the same time, and whether this would cause any damage.




So I'm using DX9 with IEM ZERO2 or Nova via 6.35 and NOIRE X via 4.4 simultaneously.

The DX9 has completely separate amplifiers for balanced (4.4 ohms and 4-pin XLR) and single-ended (6.3 ohms) headphones.
Therefore, it doesn't matter if you connect a single-ended and a balanced headphone to the DX9; it's essentially the same as having two separate headphone amplifiers.

If you connect two balanced headphones to the DX9 simultaneously, you're connecting the impedances of both headphones in parallel.
As long as you don't go below the DX9's minimum impedance, this isn't a big problem. For example, 32 ohms + 32 ohms = 16 ohms is okay, but 12 ohms + 12 ohms = 6 ohms is not.

However, with significantly different impedances, such as 32 ohms + 300 ohms = 28.92 ohms, the amplifier in the DX9 only sees the resistance of 28.92 ohms.
Do you notice anything? So, if both headphones are plugged in, you risk overloading or damaging one of them.

Even worse with very different headphones with the same impedance, e.g. an HE6se (V2) and a very sensitive IEM. The DX9 has a resistance of approximately 32 ohms, which is a really high power output.
Anyone who listens very loudly with the HE6se (V2) shouldn't be surprised if the IEM is dead afterwards, because it has just been roasted in the electric chair.

More importantly, all types of headphones are subject to aging of the materials used in the drivers and diaphragms, and also to wear and tear.
You do realize that you're significantly reducing the lifespan of your headphones if they're always plugged in, right?

Personally, I think it's a bad idea to leave two or more headphones plugged in when they're not in use. If multiple headphones are used simultaneously, none of them can be overloaded; that would be noticeable.

 

[Bl00dWolf]

The DX9 has completely separate amplifiers for balanced (4.4 ohms and 4-pin XLR) and single-ended (6.3 ohms) headphones.
Therefore, it doesn't matter if you connect a single-ended and a balanced headphone to the DX9; it's essentially the same as having two separate headphone amplifiers.

That's exactly what I was worried about.

Personally, I think it's a bad idea to leave two or more headphones plugged in when they're not in use.

I always have two connected now:
IEM to unbalanced 6.35 and NOIRE X to balanced.

In the DX9 menu, I always select one type, and the others turn off automatically:
1) IEM ON, 4.4MM OFF, 4-PIN XLR OFF
2) IEM OFF, 4.4MM ON, 4-PIN XLR OFF
3) Headphones OFF, XLR to monitors ON

I don't really want to constantly disconnect and reconnect my headphones.
As I understand it, DX9 does not supply power to them when I'm not using them, because with the XLR output to the speakers, all my headphones are in off mode.
The same thing happens when I use IEM - no sound with 4.4 Noire X. And vice versa - when I use Noire X, the is no sound with IEM 6.35.

 

[Roland68]

That's exactly what I was worried about.

I always have two connected now:
IEM to unbalanced 6.35 and NOIRE X to balanced.

In the DX9 menu, I always select one type, and the others turn off automatically:
1) IEM ON, 4.4MM OFF, 4-PIN XLR OFF
2) IEM OFF, 4.4MM ON, 4-PIN XLR OFF
3) Headphones OFF, XLR to monitors ON

I don't really want to constantly disconnect and reconnect my headphones.
As I understand it, DX9 does not supply power to them when I'm not using them, because with the XLR output to the speakers, all my headphones are in off mode.
The same thing happens when I use IEM - no sound with 4.4 Noire X. And vice versa - when I use Noire X, the is no sound with IEM 6.35.

As long as you take the trouble to deactivate the respective outputs in the menu, it's not a problem, since the outputs are physically separated via relays.