Brilliant, I hadn't thought of this! hypothetically, if you had a device that needs 7Amps, can it pull the 7A from two 4A PSU's ? https://musicmaker.ie/voodoo-lab-vl-ppav-output-splitter-barrel-y-cable-4-in?

You can get an open box Sundara direct from HifiMan for $209 or $239 depending on where you live. I've bought the Ananda + Sundara open boxes and they both appeared to be brand new. https://store.hifiman.com/clearance-sales

I thought maybe the voltage protector on the Diablo was faulty and if you dropped HYPSOS slightly to 4.7Volts it might work.

I believe those 50Watt phone chargers have stepped voltage, so on mine at 5 Volts it can only put out 3 Amps. The 50W can only be had when it steps up to 20V. Thorsten said, even the original spec for the Zen-Can was supposed to be 5V with 5 Amps but instead iFi shipped it with 2.5A thus...

Thor, I'm not sure what the maximum Amps this will deliver to the Zen-Can amp ? https://Aliexpress.com/item/1005004825653850.html

I had both the regular Zen-Dac and the Signature-Zen-Dac for a month. the Signature definitely sounds better. It's more detailed and clearer. I still use the Signature version today. For me the power supply makes no difference, the Signature is just a better sounding Dac.

@iFi audio you should send this guy the Signature Zen's to review. He enjoys Zen-Can over many other Amps.

@iFi audio you got a good review here on the Zen-Can Amp.

Yes, I've switched back and forth about 50 times over the last couple of years.

@iFi audio @Sebastien Chiu Does the newest 7.4b firmware still have the older but great sounding "Symmetrical FIR Filter" ?? "The filter in 7.2B is a symmetrical FIR filter, using three cascaded FIR interpolation filters which are equivalent to appx. 75,000 tap filter at 8 X Oversampling...

@iFi audio can you tell us is the the X-Bass on the new Air-Dac the same excellent "X-Bass" that's on the original Zen-Can or is it the heavier "True-Bass" that's on the original Zen-Dac that's too strong a boost for most music ?

The regular Zen-Dac V1 and V2 sound the exact same, I owned both. I now use the the Signature-Zen-Dac which does sound better, as it has more detail and music sounds less compressed compared to the regular Zen-Dac.

You could get an open box Ananda for $580 with Coupon Code (NewYear19) ►https://store.HifiMan.com/index.php/open-box.html

I had this problem a couple of times - for me it goes away if I only use USB power. It may have been the particular power supply unit I use.

@iFi audio Will there be a Signature-Zen-Can amp that just has the standard X-Bass ??

The Signature-Zen-Dac as it's more detailed than the regular Zen-Dac.

This company has inexpensive international shipping. ►https://AudioSanctuary.co.uk/sennheiser-hd545-hd565-hd580-hd600-hd650-earpads.html

I'm having the same experience with the Fiio Q3 THX-AAA, I just can't believe how good the 4.4mm output sounds. I believe the highs are better on this Q3 than the BTR5 which apparently has harsher less pleasing treble. Even low gain is plenty for the Sundara and hd6XX.

This might be the cheapest option. ►https://Ebay.com/itm/174478829330 X2 ►https://Amazon.de/dp/B00A7W27L6

Have you ever tried the Balanced output on the q3 ? because the 3.5mm SE is not as good. The 4.4mm sounds better as it's a bit clearer, with slightly more detail, and there's definitely more separation. I do think the Dac section on the q3 pairs well with the hd600, the highs seem to be just...

If you're concerned about microphonics on the inexpensive balanced cable, maybe try this fabric insulation kit. ►https://Amazon.de/dp/B088TNLKWC ►https://Amazon.de/dp/B07MJD9L8M

I have the HD600 an it sounds excellent on the very powerful Zen-Can Class-A amp. You can connect the Q3 4.4mm Balanced to the 4.4mm input on the Zen-Can. Get them from Amazon Germany and if you don't like, you can always return in 30 days. ►https://Amazon.de/gp/product/B08DJ4NJH5...

Can you hear a difference between the Dac in the D3 and the Dac in the Q3 ??

It's a pity iFi didn't include It's a pity iFi didn't include the regular X-Bass on these Signature-Zen-Cans too, as that extra treble will make a number of popular headphones just that bit too sharp.

I would get the Zen-Can as you already have a good Dac that you can connect to the Zen-Can amp with a Balanced interconnect. The HD600 sounds excellent on the Zen-Can as it's a slightly warmer Class-A amp, and especially with the very subtle X-Bass boost which is just perfect for the hd600...