Wellway m200mk3 front-level electronic Divider

M200mkiii is a brand new product developed by wiway integrated with cutting-edge active electronic frequency division technology: dual-4-channel Operational Amplifier, high-grade glass fiber circuit board, full SMT production process, Ruby filter capacitor array, imported metallic polypropylene divider capacitor, ultra-high power tda7294 power amplifier chip, W high power annular transformer and many other top-notch design and components, they are all at the forefront of the multimedia industry.

Wellway m200mk3 front-level electronic Divider

Circuit Diagram of front-level electronic Frequency Division

Simulation results (note that 1st gain and output attenuation circuits must be added to both high and low pass simulations)

We can see that the actual frequency is not the official 1700Hz, but 2500Hz.(To correct this, I forgot to consider that the tweeter sensitivity is 3 dB higher than the bass)

Next we will analyze each part one by one.
The first level is the same as that of 1080. The values are the same and skipped.
It is a high-Q high-pass filter, which is the "magic weapon" to solve the stubborn problem of wiway for many years ".
The Q value is 1.7, and the value is increased at 65Hz. Steep removal below 50Hz, fast cutting, everything is "quiet. Note that this is a-12db filter,
The bass speakers work at 12 dB lower than other frequencies and are easy to use.
Here, 1080mk2 is also the same-12db high-Q filter. The lifting range is 75Hz, and the Q value is as high as 1.9 (the root of the bass ).

The next step is the high and low pass.Low-pass is very interesting. Instead of using the-18db filter like 1080mk2, a capacitor is removed. Creates a second-order low-pass filter of-12db. However, we have noticed that the physical photo contains This capacitive location. It indicates that there are some original designs, but they are still removed from the finished product. The cause is estimated to be better connected with-18 dB Qualcomm, so that the last frequency point falls near Hz. By the way, the dividing circuit of the two boxes is actually the same, and the m200mk3 is fine-tuned. Low-pass Channel 2 is not a common barworth filter in the cut-off band steep attenuation, but slow rolling down, this is a reason, reduce some frequency compensation, such as board compensation. Saves components.

Qualcomm, with the same structure as 1080,-18db.Level 1 passive, level 2-12 dB active, also with balanced compensation, not a common Butte steep filtering curve. Here there is a tn25 treble factory curve, the data parameters indicate that Hz will enter the resonance. So 1080mk2 uses the simplified tn25iii with the same structure as tn25, which is only worse than tn25 and not better than tn25,
But why is the 1080mk2 frequency point "mandatory" always near the 1700hz of the chaos? Now, let's look at the Qualcomm filter comparison between the two.

 

Wellway m200mk3 front-level electronic Divider