A brand new pair of T1 arrived today with some serious sonic problems. First impression? Total piece of junk.
This is what I'm hearing:
1) There is an obvious buzzing in the left driver that resonates with signals that have a lot of energy around 2kHz, but it's not detectable, otherwise.
2) I've got almost no bass at all in the right driver - it seems to be entirely on the left side when playing most music. If I use Bink Audio Test Files instead of music, to play equal-strength pure tones to both drivers, it's easy to determine that the right driver starts suffering a massive bass roll-off at about 250 Hz. By the time you get to 100 Hz the left driver is easily 6 dB louder than the right driver. Lower still it's pretty much all in the left driver with nothing in the right driver.
3) Even in the left ear, where the bass at least appears to be functioning, it sounds like crap compared to the same test files run through my LCD-2. With the T1, selecting any of the test files at or below 100 Hz, especially, running the volume up and down while the pure tone is playing brings in all kinds of artifacts and harmonic frequencies that change as you change the volume. The LCD-2 performs this test beautifully - with nothing but a change in SPL as I sweep the volume control back and forth while playing any one of several test files at or below 100 Hz.
All three of these problems can be reproduced on three different amps - DACmini CX, Meier Stepdance, and iBasso PB2. And in either ear. If I flip the headphones around, the problem swaps to the other side of my head - so it's not my ears.
My choices are: Return them to Amazon for exchange, return them for a refund, or register them and send them to a Beyerdynamics authorized service facility.
It's ridiculous that a flagship headphone could leave the factory with no evidence of quality control. My impression of Beyerdynamics has taken a huge nose dive.
I feel like sending them back for a refund and leaving it at that, but my calmer intellect tells me that I'll be missing out on what a properly functioning T1 has to offer.