- Stock: 100
- Model: 32809232025
- Weight: 18.00kg
- Dimensions: 42.00cm x 36.00cm x 28.00cm
- SKU: 32809232025
Classic NO.290 vacuum tube pre amplifier
No.290 has a number of special, excellent circuit and process design. Every detail has been carefully rigorous scrutiny, so that its performance is more outstanding.
1. With very wide frequency response, the lower distortion and nose.
2. The main amplifier circuit is current negative feedback architecture.
3. The advanced voltage regulator is an important part of No.290. We design specifically high speed response for the parallel power supply. It can work at ±300V. This parallel power supply can run up to 1MHz. The noise is very low.
4. The -6dB balance receptor: This receptor whit same input impedence of the inverting input terminal. This makes the common mode rejection ratio increase. The No.290 can fit with the digital audio balance output interface by the -6dB gain.
5. Unclocked and no CPU type sensor volume control circuit. It reduces a high frequency interference source; the audio signal is more pure.
6. The amplifier part uses hand welding. It uses M-cap, Rel-CAP, Philips, Holco, CGW, Dale Wima and other component.
No.290 configures: balance input and output interface, mains filter, infrared remote control (All aluminum).
Technical parameter:
Total harmonic distortion: 0.004% (20Hz-20KHz 2Vrms RCA)
0.0023% (20Hz-20KHz 3.5Vrms XLR)
Frequency response: 3Hz-1.5MHz (-3dB Low Pass Filter OFF)
3Hz-200KHz (-0.75dB)
SNR: 112dB (A-Weighting 20Hz-20KHz)
Input impedance: 70K (RCA), 10K (XLR)
Output impedance: 150Ω
Input single interface: 4 sets of RCA, 1 set of XLR
Voltage gain: 13.5dB
Tube: 12AT7EH x 2, 6H30EH x 1
Weight: 15KG
This form is for customers to better understand our products. If you want to know more details or purchase our products, please enter the link of the products.
|
Number |
Picture |
Name |
Frequency Response |
SNR |
Price |
Link |
|
W-001 |
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W-003 |
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W-003 |
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W-004 |
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1PCS YAQIN MS-845 Vacuum Tube Preamp Pre-amplifier Preamplifier SRPP Circuit Best Appearance 12AX7x2 12AU7x1 AC110~220V |
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W-004 |
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W-005 |
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W-005 |
|
W-006 |
|
QUEENWAY Classic No.290 Vacuum Tube Pre amplifier Pre-amplifier Pre-amp 12AT7EH x 2, 6H30EH x 1 infrared remote control |
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112dB |
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W-006 |
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W-007 |
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10Hz - 75KHz |
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W-007 |
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W-008 |
|
QUEENWAY MC67-PL Pre amplifier preamp with MM phono amp MC7R-II electric circuit AC110V/220V 60Hz/50Hz With Remote |
See the details |
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W-008 |
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W-009 |
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W-009 |
