BRZHIFI VOL-65E 6J5 Vacuum Tube Preamplifier BT5.0 Audiophile HIFI Headphone Preamp

$79.99
  1. 6J1, 6J3, 6J5, 6K4, etc., Vacuum Tube Compatibly
  2. BT 5.0 & RCA Audio Input
  3. Treble & Bass Adjustment
  4. RCA & 3.5mm AUX Audio Output
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Specifications
Power Supply 12V 2A voltage interface)
Audio Output RAC line output: 09vrms
Chip Amplifier: NE5532P*2
  Bluetooth: AC6951C
General Weight: 490g
Size: 130*120*40MM
Meterial: Aluminum
SNR: >106dB
Frequency response: 20Hz~20KHz
Evacuated Tube: 6j5
  Impedance: 4-8Ω
Package
Power amplifier host *1
Instructions, warranty card, certificate of conformity *1
BT antenna *1
Power adapter *1

FAQ

Is it easy to replace the vacuum tubes?
Can the Vol-65E tube preamp connect to a 1969 Class-A amplifier?
What types of vacuum tubes can be replaced?
What operational amplifiers (op-amps) are used, and can they be replaced?
Does the bass and treble adjustment affect headphones?
Is there much background noise?