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Reference 3.1 (300B)

  • Rugged stainless steel chassis
  • High quality EI transformers and components
  • Switching between direct and line input
  • Switching between high and low negative feedback
  • Tube moving magnet phono stage
  • Innovative tube circuitry with choke coil
  • Point to point soldering
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Product Description

Stereo Tube Integrated / Power Amplifier
Output Impedance 4, 8 Ω
Output Power 21Wx2 (TRIODE) Class A P-P
Input Impedance 100K Ω (LINE IN) / 47K Ω (MM PHONO IN)
Input Sensitivity 200mV (LINE IN)  3-5mV (MM PHONO IN)
S/N Ratio (LINE) >80dB (HUM NOISE <3mV) / (PHONO)>65dB
Vacuum Tubes 300Bx4, 6N8Px2 & 12AX7x4
Weight N.W.: 28.7kg / G.W.: 34.6kg
Dimension (DxWxH) 475mm x 405mm x 215mm

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AS-8i
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Stereo Tube Integrated Amplifier
Input Impedance 250Kohm (RCA)
Output Impedance 4, 8 Ω
Output Power 55W×2 /CLASS AB2 P-P(ULTRALINEAR) *70W×2 MAX.
28W×2 /CLASS AB2 P-P(TRIODE) *38W×2 MAX.
Damping Factor > 5
Frequency Response 20Hz-30KHz  ±1dB
T.H.D.: < 1%  20Hz-20KHz (REF. OUTPUT)
Total Gain 29dB
Input Sensitivity 300mV-600mV
S/N Ratio > 93dB  (HUM NOISE <3mV)
Channel Balance < 1dB  20Hz-20KHz  (MAX.  VOLUME)
Channel Sepration > 65dB  1KHz-3.3KHz
Vacuum Tube V1,V2,V3,V4: EL-34(6CA7)×4
V7: 12AX7(ECC-83,5751,4004) ×1
V5,V6: 12AU7(ECC-82,6189,4003)×2
Dimension (L × W × H) 410mm × 320mm × 190mm
Weight N.W.:18kg
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Pre-2
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Stereo Tube Preamplifier
Line Output 2-20V P-P MAX.
Output impedance <1K Ω
Frequency response 10Hz-120kHz ±1dB
T.H.D. <0.2%  20Hz-20kHz(REF. OUTPUT)
Input sensitivity 150mV (Line Input)
0.3-1mV (IC. MC. Phono Input)
3-10mV (IC. MM. Phono Input)
Input impedance 100KΩ(LINE INPUT)
3-100Ω(MC. PHONO INPUT)
47KΩ(MM. PHONO INPUT)
S/N Ratio >90dB (Hum Noise<200uV)/Line Output
>68dB (Hum Noise<0.5mV)/MC. Phono Output
>70dB (Hum Noise<0.4mV)/MM. Phono Output
Channel Balance <0.7dB  20Hz-20KHz (Max. Volume)
Channel Separation >65dB (1KHz-3.3Khz)
Vacuum Tubes 6SL7×4
Weight N.W.: 6.5KG / G.W.: 8KG
Dimension (L×W×H) 335mm × 250mm × 110mm
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