Small headphones from Sennheiser. A perfect headphone debut with a well-balanced overall balance from bass to treble. Rather than sharp sounds, they are the type that enjoys the afterglow of the sound. There is dullness and a feeling of use (Sasaki Shota)
Maintenance information: 2024.9.7 sound output operation confirmed
Accessories: case
Main specifications: sealed dynamic headphone impedance 18 ohms playback frequency 16 Hz to 22 kHz sound pressure level 112 dB
The details of the 1.2m Sennheiser recable are unknown, but it is a soft cable and easy to handle (Tamura Eiji)
Maintenance information: 2024.8.30 Operation confirmed (sound output confirmed on HD650)
Accessories: none
*All accessories such as cables are missing. A Bluetooth wireless version equipped with a noise guard hybrid function for the company's popular Momentam model. There are stains and scratches. A USB Micro-B cable is required for charging (Oikawa Tetsuji)
Maintenance information: 2024.8.18 Operation confirmed (sound OK, Bluetooth OK, pairing OK, charging OK)
Accessories: none
Main specifications: dynamic sealed output sound pressure level 102 dB playback frequency band 16 to 22,000 Hz sensitivity 110 dB impedance 18 ohms weight 180 g
* Since the built-in battery cannot be used due to deterioration, it is only driven by the included AC adapter. This is a portable headphone amplifier that uses a vacuum tube (subminiature tube) to amplify the signal. Since it has driving power, the Sennheiser HD800, which has an impedance of 300 ohms, also drives well. The clear and powerful sound that overturns the image of a tube amplifier is impressive (Kojima Yosuke)
Accessories: AC adapter
Main specifications: 1 input (3.5 mm stereo mini), 2 headphone outputs (6.3 mm stereo/3.5 mm stereo mini)