The A-75 includes an upgraded version of the "MCS+Circuit" primary slow charging amplifier circuit equipped with "MCS" and an improved version of the multi-stage Parallel circuit design, combined with current feedback design, ensures linear response of each level. The amplification unit circuit is connected in parallel to reduce noise. A DC stabilized power supply is installed in the drive section and MCS+circuit to improve SN ratio and enhance sound purity.
The high-efficiency large transformer is housed in a metal cover and equipped with a "super large pond" filtering group to provide sufficient and stable power supply.
The amplifier part adopts a fully balanced amplification circuit design, and each channel uses 12 high-power field-effect transistors as amplified outputs to achieve high-quality and high driving force.
Provide true power amplification outputs for pure Class A 60W x2 (8Ω), 120W x2 (4Ω), 240W x2 (2Ω), and 480W x2 (1Ω). Provide powerful power output and super strong driving capability.
A-75 Technical Parameters:
1： Rated continuous output power (20HZ-20000HZ)
Pure Class A: Stereo 480W X2 1 ohm output
240W X2 2 ohm output
120W X2 4 ohm output
60W X2 8 ohm output
Fully balanced bridge: 960W X2 2 ohm output
480W X2 4 ohm output
240WX2 8 ohm output
2： Frequency response: 20-20, 000HZ +0 -0.2db
1W output: 0.5-160, 000HZ +0 -3 db
3: S/N signal-to-noise ratio. Full frequency 118db
4： Total harmonic distortion: 0.05~2ohms. 0.01%~8ohms
5： Input impedance: 40K (balanced input), 20K (RCA input)
6： Input sensitivity: 0.87V rated continuous average output
0.11V outputs 1 watt of power
7： Gain: MAX -3dB-6dB -12Db
Corresponding magnification: 28 25 22 16
8： Damping coefficient: 1000
9： Magnification factor: 28dB
10： Static power consumption: 260WTMaximum power consumption520W
11： Overall dimensions: 430W*225H*5005mm
12： Net weight: 28 (kg)
1. SPEAKERS speaker output conversion: OUT-A speaker A group connection
There is a sound coming from the wiring post, and there is a sound coming from the wiring post of OUT-B speaker group B,
There is sound coming from both sets of terminals of OUT-AB speaker AB, OFF
All terminals are silent.
2. WMeter RANGE level indicator light strength conversion: 10W
Select for low volume input and 100W mid-range volume input
Used for 1000W high volume input.
3. POWER machine power on key: When pressed in place, self-locking occurs
It is in the power on state. Press the button again in the power on state to reverse it
After bouncing in place, it is in the shutdown state.
4. IRPUT key: When the IRPUT key is pressed and locked in place, the panel
When the LINE light is on, it indicates that the RCA signal input is conducting. Press it again
The IRPUT button indicates a balance signal when the BALANGED light on the panel is on
Input continuity.
5. GAIN signal input roll off: mainly for signal source output
The sound is too loud, and there is no roll off of the input signal when MAX is selected,
You can choose to roll down by 3db- 6db，- 12dB.
Operation switch: When the Operation switch is switched to
BRIDER is the signal input when the amplifier is bridged (the BRIDGE light on the panel is on,
Speaker connection method during bridging: Connect the positive terminal of the speaker to Group A LEFTL red wire
Column, connect the negative terminal of the speaker to Group A with a red terminal (RIGHT)
When the ACTION switch is switched to NORMAL, it indicates that the amplifier is not bridged
Signal input (panel bridge light off).
