Name: Mass-Kobo model 475 Full-Balanced Portable Headphones Amplifier
SKU: 64c2304c6daa6d0013e34b0f
Price: 14800.0 HKD
Availability: OutOfStock

Description

The full balanced headphone amplifier model 428, which has gained popularity since its release, now features an upgraded external DC power supply terminal. The previous USB micro B has been replaced with the more advanced USB Type-C, offering improved connectivity.
For enhanced reliability, the input and output terminals for the Balanced connection utilize Pentaconn connectors manufactured by Nippon Dicks Co., Ltd. These connectors are known for their high quality and robustness. Additionally, all internal substrates are directly connected without the use of cables, and the connectors themselves are gold-plated. These design choices contribute to improved sound quality.
These amplifiers are equipped with a convenient mode change-over switch, allowing you to connect both balanced and unbalanced output players. This versatility enables compatibility with a wide range of audio devices.
Both models also feature the output gain-changing switch, which has been well-received in our flagship model 406. With this switch, you can now enjoy listening to all types of headphones and earphones, whether they have dynamic or balanced-armature drivers, using a single amplifier.
When powered by alkaline AA batteries, the amplifier can provide approximately 4 hours of usage time. Please note that the actual battery life may vary depending on the condition and type of batteries used.
Alternatively, you have the option to power the amplifier by connecting a power bank to the USB Type-C terminal. It's important to note that the amplifier does not have a charging function or digital input/output capabilities when powered in this manner.

SPECIFICATIONS: (BATT. 6V OR USB 5V)

MODEL: FULL-BALANCED PORTABLE STEREO HEADPHONE AMPLIFIER
INPUT: Φ4.4 TRRS X 1 (BALANCED OR UNBALANCED)
OUTPUT: 4.4 TRRS (BALANCED) , Φ3.5 TRS (UNBALANCED)
MAXIMUM INPUT LEVEL: +16DBM (BALANCED), +10DBM (UNBALANCED)
MAXIMUM OUTPUT LEVEL (P-P): 7 V (BALANCED), 3.5V (UNBALANCED) (WITH 32Ω LOADED, 1KHZ, THD+N 0.5%)
　　　　　　　　　　 (RMS): 2.3V (BALANCED) , 1.2 V (UNBALANCED) (WITH 32Ω LOADED, 1KHZ, THD+N 0.5%)
MAXIMUM OUTPUT WITHOUT DISTORTION: 165MW (BALANCED), 45MW (UNBALANCED) (WITH 32Ω LOAD, 1KHZ, THD+N 0.5%)
FREQUENCY CHARACTERISTICS: 20HZ - 20KHZ (-1DB)
NOISE LEVEL: LESS THAN 40ΜV (IN THE MINIMUM VOLUME POSITION, 32Ω LOADED) LESS THAN 150ΜV (IN THE MAXIMUM VOLUME POSITION, 32Ω LOADED)
POWER SUPPLY: AA ALKALINE OR RECHARGEABLE BATTERY X 4
EXTERNAL POWER SUPPLY: MICRO USB +5V
CONSUMPTION CURRENT: 0.19A (BATTERY 6V, NO SIGNAL) 0.21A (RECHARGEABLE BATTERY, 4.8V NO SIGNAL) 0.21A (USB 5V, NO SIGNAL)
　　　　　　　　　　 0.28A (BATTERY 6V, 1/8 OUTPUT) 0.32 A(RECHARGEABLE BATTERY, 4.8V, 1/8 OUTPUT) 0.31A(USB 5V, 1/8 OUTPUT)
　　　　　　　　　　 0.49A (BATTERY 6V, MAXIMUM OUTPUT) 0.61A (RECHARGEABLE BATTERY), 4.8V, MAXIMUM OUTPUT) 0.58A (USB 5V, MAXIMUM OUTPUT)
SIZE: 97MMW X 132MMD X 40MMH (NOT INCLUDE PROTRUSIONS)
WEIGHT: 440G (WITH BATTERIES), 382G (WITHOUT BATTERIES)

Mass-Kobo model 475 Full-Balanced Portable Headphones Amplifier

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