Refusal to take responsibility.
Hi, Just thought I would make a note here of your handling of my issues. I ordered a pair of HD6xx headphones and then earlier today recieved the package. I drive to go and get it, as I like in the UK I had to pay import tax and handling fees. These total £47.92. The breakdown being £35.92 in tax and £12 in fees. These taxes were calculated of the shipping label of the box, which marked the shipment as the 6xx headphones of $199 value. Before leaving the parcel depot, I open the box to find a $35 lord of the rings mousepad. So now the problem is not only do I not have the headphones, but you have marked the shipment wrong so I have paid £47.92 fees for the handling of the mousepad. Which would have acrued £0 of fees if marked correctly as it is under £135. I go back to the desk but as I have already paid the fees I am unable to reject the shipment, but as the box said 6xx, there was no way for me to know before opening it. I contact support and they offer me a replacement, which...
Jan 17, 2025
The new “CTH” has significant improvements to the original design: Higher power output, approximately 1W into 50 ohms. The new CTH has some global negative feedback reducing the gain from the mu of the triode to a more manageable gain of 8x. By reducing the gain, we are able to make the amp work with the widest array of headphones through a very simple design to operate. The unity gain, discrete output buffers on the new CTH are updated versions of the buffers used in the Cavalli Audio Liquid Glass amplifier and provide the same or better performance.
THE ORIGINAL
The original CTH used a 24VAC wall wart power supply. This is suitable for a DIY project, but this type of power supply is uncommon and introduces raw power line AC and rectifier noise into the power supply circuit and the amp. The new CTH uses a 28VDC external power supply which is quieter than the original 24VAC supply. The power supply has no rectifier noise at 120Hz. The power supply also handles universal voltage (100-240V) for a single power supply version (use with plug adapters for your country if needed).
Anything the same? The original CTH has an auto-bias adjustment circuit on the tube so that no manual adjustments are needed. The new CTH does too.
PLEASE NOTE: The original CTH was designed to roll many different types of tubes. The new CTH is designed around the 6922 for simplicity of use. Owners can roll different types of 6922 or equivalent tubes, but they cannot roll other tube types into this new amp.
NEW TO AUDIO?
Massdrop 101: What Is An Amp? https://www.massdrop.com/talk/87/massdrop-101-what-is-an-amp
Massdrop 101: What Is A DAC? https://www.massdrop.com/talk/92/massdrop-101-what-is-a-dac