2026 New Queenway A-300BI 5TH 300B 4PCS Integrated Tube Vacuum Amp Class A 18W*2 with Remote & Ca-yin Line Magnetic Tube Amp

High Frequency Testing Listening Feeling by Queenway Tube Amplifier and Aurum Cantus Loudspeakers

https://youtu.be/bd7kshwk8fc

PREIN pure post-processing mode:

By using the PREIN&LINEIN switch at the back of the machine to switch to pure rear stage mode, it can be used in conjunction with the 501 gallbladder front stage or other front stages, bypassing the built-in volume potentiometer for better sound quality

New promotion choke coil:

The load choke inductor is used in the driving part of the electronic tube, and its reasonable application has a finishing touch effect and function. Load inductance coupling and resistance capacitance coupling are two completely different styles, and different devices have different sound effects. If used well, they are better than pure resistance sound, and the effect is immediate. There is a feeling of replacing a high-end oil immersed silver foil coupling capacitor. Low frequency elasticity is loose, the sound is atmospheric, and the charm is better than that of resistive loads.

No feedback from the large loop:

More vivid listening experience, richer overtones, and stronger bile flavor; Better transient response and light rhythm

The large loop negative feedback will correct distortion, but at the same time, it will also smooth out some of the natural even harmonics and subtle overtones of the electronic tube. No feedback loop, retaining the harmonic characteristics of the electronic tube itself, the voice and instrument are warm and loose, and the sound is more "analog". Many audiophiles pursue the charm of the heart machine from this.

The large loop feedback has phase lag, and the large dynamic instantaneous feedback cannot take effect in time, which will cause slight tailing and damping delay. Without large loop feedback, the signal pathway is more direct, and transients come quickly. Percussion, guitar plucking, and drum beats are sharper and less sluggish.

Features of this machine:

Technical parameter:

• Output Power: Class A 18W＋18W (RMS triode working state)

• THD: ＜0.5% (1kHz @ 1W, 8ohm)

• Frequency Response: 20Hz～50kHz (-1.5dB)

• SNR: 89dB(A-weight)

• Input Sensitivity: 800mV

• Input Impedance: 100kΩ

• Dimensions of the body with wiring terminals and heel (W x D x H): 43CM x 34CM (knob+2CM) x 24CM

• Body size (W x D x H): 42 CMx 34CM x 24CM

• Packing Size: 57cm*51cm*37cm

• Output Impedance: 4Ω, 8Ω

• 3 Groups RCA input

• Using Vacuum Tube: ECC82(12AU7)×2, 6SN7×2, 300B×4

• N.W: 29kg

• G.W: 34kg

• Power Supply: 110V～220V ±10%

• Power consumption : 420W