Original OPA-3A 300B OPA-3A aural amplifier balance port hi-Fi valve amplifier
$2,611.80
Ex Tax: $2,611.80
- Stock: 5
- Model: 4001120533798
- Weight: 24.00kg
- Dimensions: 45.00cm x 35.00cm x 25.00cm
- SKU: 4001120533798
Product parameters:
Rated output power: external speaker output: 8W+8W ( 4-8Ω load)
Balanced earphone output: 4500MW+4500MW (32Ω load)
Single-ended earphone output: 1000MW+1000MW ( 32Ω load)
Whole machine frequency response: 20Hz~50KHz (-15dB)
Harmonic distortion: 0.5% (1kHz)
Signal to noise ratio: 89dB
Input sensitivity: 220mV
Input impedance: 100kΩ
Left and right output balance: <0.5dB
Use vacuum tube: 12AU7x2, 300Bx2, 5U4Gx1
Overall size (WXDXH): 360mmx275mmx170mm
Net weight: 20kg
Working conditions: Temperature: O℃~40℃ Humidity: 20%~80%
Storage conditions: Temperature: -20°C~70°C Humidity: 20%~90%
Earphone output mode is variable pressure output：
Output impedance: speaker 6Ω/earphone 64Ω
Output impedance when earphone balanced: 64Ω /6.5 output 32Ω
Vacuum tube 300B and 5U4G use Hengyang, 12AU7 uses shuguang
Product feature:
1: The whole machine adopts high-quality PCB welding to ensure stability and consistency
2: Two EI type output transformers with high-quality broadband response and high-quality Japanese Z11 iron core
3: Use high-power Z11 iron core EI power transformer specially designed for this machine
4: The high voltage part uses 274B/5U4G as the rectifier
5: Pre amplifier uses two 12AU7 vacuum tubes,
Power amplifier uses two 300B vacuum tubes for class A single-ended power amplification.It fully reflects the delicate, smooth and transparent personality unique to 300B.
6: Input has BALANCE/RCA selection
7: Earphone output can choose 4-core balanced output and 6.5 head output
8: With external speaker function
9: Boot mute delay function (about 30 seconds)
10: The power input uses FurutechFI-03 with insurance power tailstock
11: The power switch uses the British RS silver-plated contact power switch
12: The signal input uses the original American CARDAS/RCA signal socket
13: The volume potentiometer uses the original British AN audionote.
14: Easy-to-install plug-in Vacuum tube protective cover.