On the last day of the technical transformation competition at the end of the month, Duan Yun finally got the elaborate elm speaker from Master Jing.

The beauty of this speaker made Duan Yun's eyes light up suddenly.

The wooden pattern is very beautiful, like a quicksand-like pattern, and the long-term charcoal gray air-drying makes the surface of the chassis reveal a simple amber color, which looks very beautiful and atmospheric at a glance.

In addition, the material is also quite thick, and the place where the traditional pig fat glue is bonded is smooth and bright, which obviously takes a lot of effort.

Compared with the mass-produced wooden and plastic speaker shells of later generations, this speaker made by Jing Zhiqian is obviously a little thicker, although the shape is simple, it can still give people an amazing feeling.

After the speaker shell was in place, Duan Yun immediately began to assemble the circuit board speakers.

Duan Yun first installed a thick layer of soundproof cotton inside the speaker box, and then installed the power amplifier circuit board into the speaker.

The power amplifier board installed by Duan Yun this time can adjust the frequency, which is controlled by two knobs, all of which are made by Duan Yun in his own workshop.

Considering the high power consumption of the subwoofer, the active speaker circuit designed by Duan Yun is an eight-inch, a three-inch speaker, and the design of the golden section is placed in the upper and lower directions.

So after the components were assembled, Duan Yun connected the wiring of the speaker to the amplifier port of the tape recorder.

Loading a disco tape, Duan Yun connected to the power supply and pressed the switch.

"Jump card!

Rhythmic music immediately came out of the speakers, and the sound quality was noticeably better than the last one I made.

The subwoofer is a speaker that is very particular about the placement, Duan Yun held the speaker back and forth in the room to listen to the audition, and finally felt that it was placed in the corner of the wall on the left side of the door.

After Duan Yun simply adjusted the volume and bass frequency of the speaker, the dance music suddenly became much brighter and more pleasant.

"Brother, what are you doing here?"

"This music is amazing!"

"What's that?"

Cao Dong and Cui Lin, who were working in the small room next to them, immediately ran over with excitement after hearing the dance music played by the speakers.

The tape recorder left by Gao Lei was listened to every day by several young workers, but it was the first time they had heard such an exciting subwoofer sound quality.

In fact, the frequency, rhythm and regular sound wave vibration of music are a kind of physical energy, and moderate physical energy will cause the harmonious resonance phenomenon of human tissue cells, and the resonance phenomenon caused by this sound wave will directly affect people's brain waves, heart rate, breathing rhythm, etc., so that the cell body produces a slight resonance, so that people have a sense of comfort and comfort, and the change of rhythm makes the human body have a full and smooth feeling.

This is also an important reason why subwoofers are all the rage in later generations and are sought after by many audiophiles.

"Brother Duan, is this the speaker you said? It's so beautiful. After Cao Dong glanced at the speaker in the corner, he couldn't help but exclaim, and reached out to touch it.

"Don't move!" Duan Yun opened his hand and said, "This varnish hasn't dried yet." ”

"Brother, this speaker is really good, much stronger than the tape recorder speaker. Cui Lin on the side couldn't help but praise.

"Isn't this nonsense, if it's not as good as a tape recorder, why would I have put so much effort into it? Duan Yun scolded with a smile.

"It feels better than the last time we had the speakers at the roller skating rink, and the sound is comfortable to listen to. Cao Dong listened to the dance music and said with some intoxication.

"It's not the same thing at all. Duan Yun pursed his lips and continued: "The one in the roller skating rink is called a speaker, and the one I designed and made is called a subwoofer, which is not a grade at all. ”

"Subwoofer? Cao Dong and others heard such a speaker name for the first time, and they praised it.

"Brother, why is it called a subwoofer? Can this thing be related to a cannon?" asked Leizi.

"Where are you talking so much nonsense, Brother Duan said that he is a cannon is a cannon! Look at this horn is so big, isn't it like the muzzle of a cannon?" Cao Dong turned his head and scolded Lei Zi.

"Hahaha. Duan Yun laughed when he heard this, turned his head to everyone and said, "Don't you want to know why it's called a subwoofer, I'll turn up the volume and frequency for you." ”

Duan Yun said, squatting down, and reached for the knob above the speaker with his left hand.

Now Duan Yun has adjusted the volume and frequency to be relatively small, just to test the sound quality of the midrange, but this time, Duan Yun turned up the bass frequency and volume a little.

"Jump Cards!!Jump Cards!!"

The moment the bass pitch was raised, several people, including Duan Yun, suddenly felt that the sound of the dance music had become shocked, and they had an obvious sense of orientation.

"This ...... It's amazing!"

"I think it's exciting!"

The enhanced bass effect instantly enhances the details of the bass part of the dance music, making everyone present feel more shocked.

"Brother, you're amazing!" Cao Dong, who was standing behind him, was amazed and said, "If this speaker is taken out and sold, it will definitely be sold at a good price!"

Seeing that the effect of this subwoofer is so shocking, Cao Dong and others admire Duan Yun in their hearts, in their opinion, Duan Yun is simply a genius, although they have not seen foreign high-end audio, but with the magical effect of Duan Yun's current audio, it is a proper crushing of various domestic audio equipment.

"Brother Duan, smoker. At this time, Cui Lin took out a cigarette and handed it to Duan Yun, lit it with a match, and squatted down to carefully observe the subwoofer.

When he saw the two knobs above, he twisted them with his hands.

"Don't move!" Seeing this, Duan Yun immediately frowned and shouted.

"Buzz ......"

Duan Yun obviously shouted a little late, Cui Lin had already turned the knob on it to the maximum position, and a strong resonance sound immediately came from the speaker.

"Jumping Card Cards!! Jumping Card Cards!!

Duan Yun's bass amplification circuit is specially strengthened by a coupled broadband amplifier, and the bass frequency is even higher than that of ordinary subwoofer products in later generations, and there is no limit to the safe frequency.

So when Cui Lin adjusted the bass frequency to the highest, after several people in the room heard such a high-frequency bass effect, the whole person felt a strong shock effect, their heartbeat suddenly accelerated, and even the hairs on their whole body stood up!

"Buzz...... Smack!"

At this time, the glass of the window resonated with the sound for a short time, and then made a crisp sound, and after two pieces of glass shattered, they fell to the ground with a clatter!

Seeing this scene, Cui Lin, Cao Dong and others were completely stupid.

"Smack!" Duan Yun reacted quickly, stepped forward and ripped off the power of the tape recorder, and pointed to the broken glass of the window and shouted to Cao Dong: "Deduct your salary!

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