I'll raise their attention to the inadequacy of the current UI design and urge them to improve the readability of the song list. It probably will take a while before we do anything solid but your suggestion is heard. :pray:

The 3D printed prototype will assist us in making an informed decision regarding the external design of the portable amplifier. From here on, we shall carry out further structural optimization to include internal details such as PCB mounts, suspended installation of Nutube, and rails for the...

I promised to come back when we make any progress on the C9ii. 3D printing has become an essential part of our portable product development, it is a lot more efficient than old-school prototyping when we can feed our CAD modeling to the 3D printer directly. These are snapshots from the R&D...

To make it easier for the readers, I have revised my signature, let's hope this thread will pick up more tech. discussion on portable vacuum tube applications. :beerchug:

If you switch off the main power, it certainly won't update the system clock. If you set the Date and Time to Auto-update, the iDAP-8 will catch up with the clock when you power on again. If you have connected to WIFI before, it will automatically connect to WIFI after powering on, if you...

This is a WIP project, we haven't finalized the industrial design so it might look differently by the time we launch it in 2025. It is transportable so we designed it to run on battery or AC power. This will be Cayin's first attempt at an AIO (All-in-One) product and the player section will...

I find it interesting to describe the limitation as a "manufacturer claim". For those who are interested in pairing Susvara with HA-3A, I would like to quote my previous sharing here: One distinctive R&D objective is to develop HA-3A for the best quality within certain limitations. It is not...

Where did you store the update zip file in your TF card? Directly under the root directory?

When you perform Music Scan, the DAP will refresh the music library according to the current content of your SD. If you didn't perform Music Scan, you can only view the newly added file through Folder view.

The same argument applied, there isn't any external power supply that can bypass the battery and feed the C9 or the N7 directly. In both cases, you are charging and playback simultaneously.

I'll check with our Sales to find out if we can sell the cable through our Alibaba shop.

When we say unamplified output, we refer to bypassing the headphone amplifier circuit completely. We can have a low gain voltage amplifier in line out/pre-out application, which is necessary in most implementations. Even with line out, to reach 2V single-ended and 4V parallel, you need to have...

The 170HA power supply is tube rectified. To stack the external power supply under the amplifier, we need to install the rectified tubes in the amplifier chassis and run the cable down to the external power supply separately.

I am very interested in this pairing too. After I auditioned for the original RAAL SR-1B, I was stunned and wanted to find out if I could use it with our amplifier. I wrote an email to Danny of Requisite Audio asking if the HA-300 is remotely possible, and the answer is not feasible. Now that...

Since I have managed the RU6 and RU7 discussion threads, I have learned that not all USB-C cables are the same, and the audiophile cable descriptions are not particularly helpful. First of all, the cable must be OTG-ready, we have noticed a lot of PD-certified cables that are brilliant for...

The N3Ultra comes with Dual Line Out capability. The 3.5mm port (next to the USB-C port) is a dedicated single-ended line-out connector, you can connect M3Ultra to a portable amplifier with a 3.5mm to 3.5mm stereo interconnect. If you want to connect N3Ultra to a desktop amplifier you'll...

This is Scheduled Power Off, We have this feature in our Linux-based DAP such as N3Pro, but we couldn't implement this feature in this Android environment. The feature does not mean to show up in the N3Ultra menu, we have removed the edit pull-down menu function since v1.1 and removed this...

You should adjust volume on RU7 after connecting it to you iPhone. Resistor network DAC is very demanding on input integrity and max output is the only way to safeguard the integrity of digital output from your mobile phone

I read Twister's comment with interest, but I can't respond to his discussion directly because the topics involve my competitors. On the other hand, Twisters raised his concern based on the FORUM discussion norm. To my understanding, the "Bay Street (financial district) guys who bought the A&K...

I just back from the Shenzhen Headphone Expo, sorry for the late response. You'll need an HDMI Audio Extractor that provides USB Audio Class 2.0 and HDMI bypass. This kind of product is technically feasible but I have been looking for something like this in the past two years, no luck so far...

Yes, this is THE critical component of our vacuum tube amplifier, that's why we have half the floor in our facility to develop and mass product transformers in our 4-storey manufacturing facility. We design and produce all the output transformers and power transformers in our speaker amplifiers...

The 170HA demo unit in Munich High-End is an engineering sample, we demoed another engineering sample at the Shenzhen Headphone Expo last weekend. The two samples use different winding in the output transformers. The Shenzhen sample has slightly smaller output power when compared to the Munich...

The Cayin Soul 170HA debuts in Mainland China today at Shenzhen Headphones Expo 2024. This is a 3 days events starting 9 am today (17 May), I had a brief audition before the crowd of audience arrived, and took some photo for the benefits of those who can't attend this event. Yes, that's 99.9%...

That probably means the scanning process ran into a music field that they can't process, reason varied from special symbols in filename or key ID3 field in metadata.

You can disable the home button wake up by disabling the "Double Click Wake Up" feature through System >Gesturers menu. The folder view is fairly reliable in our experience, can you provide more information regarding the folders that aren't available? You can drop me a PM with more photos if...