MUSMYS A-75 Pure Class A Power Amplifier, Golden Throat A-75 HIFI Stereo Audio Amplifier for Home Sound System
Price range: $1,489.00 through $1,506.00
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Email: 17786872035@163.com
WhatsApp：+86 17786872035
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1： Rated continuous output power (20HZ-20000HZ)
Pure Class A: Stereo sound：
480W X2 1 ohm output
240W X2 2 ohm output
120W X2 4 ohm output
60W X2 8 ohm output
Fully balanced bridging：
960W X2 2 ohm output
480W X2 4 ohm output
240W X2 8 ohm output
2： Frequency response：
Continuous rated output ：20-20000HZ +0 -0.2db
1W output： 0.5-160000HZ +0 -3 dB
3： S/N signal-to-noise ratio full frequency band 118dB
4： Total harmonic distortion: 0.05 2 ohms 0.01% 8 ohms
5： Input impedance: 40K (balanced input), 20K (RCA input)
6： Input sensitivity: 0.87V rated continuous average output
0.11V output 1 watt power
7： Gain attenuator: MAX -3dB -6dB -12Db
Corresponding magnification: 28 25 22 16
8： Damping coefficient 1000
9： Amplification factor of 28dB
10： Static power consumption 260W, maximum power consumption 520W
11： Overall size 430W * 225 H * 500 Dmm
12： Net weight 28 (kg)
Features:
â—Class A output, 120W4 Ω × 2 stereo sound
â—The output adopts 12 field-effect power transistors per channel, which can drive impedance as low as 1 Ω.
â— The input adopts an exclusive white master developed fully balanced low noise module, which can greatly expand the frequency
response of music, improve sound clarity and intensity
â—The voltage amplification section adopts two sets in parallel to reduce input noise and improve dynamic range.
â—Adopting DC stabilization technology to ensure stable operation of the power amplifier.
â— Add (220V) voltage isolation technology to effectively isolate DC from entering the transformer.
each level. The amplification unit circuit is connected in parallel to reduce noise, and a DC stabilized power supply is installed in the drive section and MCS+circuit to improve SN ratio and sound purity. The high-efficiency large transformer is stored in a
metal cover, combined with a "super large pond" filtering group, to provide sufficient and stable power supply. The amplifier part adopts a fully balanced amplification circuit design, with 12 high-power field-effect transistors used for amplification output ineach channel, achieving high-quality and high driving force. It provides pure Class A 60W x2 (8 Ω), 120W x2 (4 Ω), 240W x2 (2 Ω), and 480W x2 (1 Ω) true power amplification outputs. Provide powerful power output and super strong driving capability.
Super large capacity capacitor is the key to good sound of A75. We have invested heavily in customizing capacitors, and after strict testing and control, any slight nonconformity is eliminated. Therefore, our quality control is very strict
A single 160000VF, with 4 units per machine, is 640000VF, which is a true super large pond capacitor with a configuration comparable to 200000 RMB equipment.
We have newly developed fully balanced and fully split buffer amplifiers, which effectively improve the signal-to-noise ratio and expand the dynamic range. The fully balanced amplification technology has advantages such as good symmetry, small distortion, high stability, and strong driving force compared to ordinary amplification technologies.
By adopting a fully balanced amplification circuit design, the performance of CMRR is greatly enhanced, and it has a high ability to suppress harmonic distortion,
However, fully balanced amplification requires strict matching of circuit components, and the number of components used will double, so it is mostly applied in professional models or advanced Hi Fi equipment. And the true A75 input buffer comes with a -3-6-12dB switching option, which can be paired with input impedance of different stages
This is the spirit of Hi End! Moreover, the damping factor has been increased from 800 to 1000, which is a significant progress.
Therefore, a new replacement model A-75 will be launched,
Many shoddy amplifiers on the market usually use a 16A relay as the output damping coefficient, which is randomly written as over 1000, and the signal-to-noise ratio can actually be written as 150dB. It is also difficult for top audio manufacturers in the
world to produce such data, and it can be basically judged as a false parameter.
Most power amplifiers on the market use relays for sound protection. Omron's commonly used high current relay has a maximum current of only 16A. For a high current output amplifier, this is a bottleneck. No matter how many power tubes or transformers there are, they are ineffective. The output relay is like a faucet and cannot withstand high flow, so the control of the speaker is not good. In severe cases, the relay may burn out and the speaker may be scrapped, The flagship power amplifier of the Golden Throat has already adopted ultra high current MOSFETs, so it will not become a bottleneck of the power amplifier. A single transistor can pass through 260A, and the relay is only 16A. The difference is clear at a glance.
1. SPEAKERS speaker output conversion: OUT-A speaker group A terminal has sound, OUT-B speaker group B terminal has sound, both OUT-AB speaker group AB terminals have sound, and OFF all terminals have no sound.
2. WMETER RANGE level indicator light intensity conversion: selected for 10W low volume input, 100W medium volume input, and 1000W high volume input.
3. POWER machine power on/off key: When pressed in place and self-locking, it is in the power on state. When pressed again in the power on state and rebounded into place, it is in the power off state.
4. IRPUT key: When the IRPUT key is pressed to lock in place, when the LINE light on the panel is on, it indicates that the RCA signal input is conductive. Press the IRPUT key again, and when the BALANGED light on the panel is on, it indicates that the
balanced signal input is conductive.
5. GAIN signal input roll off: mainly aimed at signal source output sound that is too loud. When MAX is selected, the input signal does not
When the Operation switch is switched to BRIDER, it is the signal input when the amplifier is bridged (the BRIDGE light on the panel is on, and when bridged, the speaker connection method is as follows: the positive pole of the speaker is connected to Group A Left L red terminal, and the negative pole of the speaker is connected to Group A Right red terminal). When the Operation switch is switched to NORMAL, it is the signal input when the amplifier is not bridged (the BRIDGE light on the panel is off).
Additional information
| Weight | 30.000 kg |
|---|---|
| Dimensions | 50 × 50 × 30 cm |
| Brand Name | NONE |
| Control Method | Others |
| Material | Metal |
| Surround sound channel configuration | Others |
| Output Power | 50 |
| High-concerned chemical | none |
| Maximum Power Per Channel | 131-200W |
| Origin | Mainland China |
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