Crossover crossover filter for car subwoofer. Scheme, description

Free technical library

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
Free library / Schemes of radio-electronic and electrical devices

Crossover filter for car subwoofer

Free technical library

Encyclopedia of radio electronics and electrical engineering / Miscellaneous electronic devices

Comments on the article

The figure shows the electrical circuit of a car crossover (crossover filter) for a subwoofer.

The input stage on the transistor Q1 is a differential summing amplifier, and the switch S1 serves to switch the polarity. A switched capacitor filter with a rolloff of 24 dB per octave (IC1) is the basis of the ramp filter. Potentiometer R13 controls the filter cutoff frequency on IC1 by adjusting its clock speed. Because switched-capacitor filters, by definition, work with discrete signals, IC1 must have an antialiasing filter at its input. Such a second-order low-pass filter is assembled on transistors Q2 and Q3 and the corresponding elements.

(click to enlarge)

The output of IC1 is fed through pin 5 to an infrasonic filter capable of boosting the lowest frequencies. When switch S2 is closed, a rise appears in the frequency response. Additional subsonic filtering is provided by capacitors C1 and C2 directly at the input of the crossover circuit. A so-called reconstructive filter is assembled on resistor R18 and capacitor C 10, which eliminates the remnants of quantization noise.

The power supply circuit, assembled on the 78L08 integrated regulator (IC2), provides both a main supply voltage of 8,6 V and a bias voltage of 4,8 V. Diode D1 protects the circuit from negative voltage surges and incorrect connections. Diode D2 biases the reference pin of the 78L08 regulator by 0,6V to produce an output voltage of 8,6V instead of 8V.

Publication: cxem.net

See other articles Section Miscellaneous electronic devices.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Alcohol content of warm beer 07.05.2024

Beer, as one of the most common alcoholic drinks, has its own unique taste, which can change depending on the temperature of consumption. A new study by an international team of scientists has found that beer temperature has a significant impact on the perception of alcoholic taste. The study, led by materials scientist Lei Jiang, found that at different temperatures, ethanol and water molecules form different types of clusters, which affects the perception of alcoholic taste. At low temperatures, more pyramid-like clusters form, which reduces the pungency of the "ethanol" taste and makes the drink taste less alcoholic. On the contrary, as the temperature increases, the clusters become more chain-like, resulting in a more pronounced alcoholic taste. This explains why the taste of some alcoholic drinks, such as baijiu, can change depending on temperature. The data obtained opens up new prospects for beverage manufacturers, ... >>

Major risk factor for gambling addiction 07.05.2024

Computer games are becoming an increasingly popular form of entertainment among teenagers, but the associated risk of gaming addiction remains a significant problem. American scientists conducted a study to determine the main factors contributing to this addiction and offer recommendations for its prevention. Over the course of six years, 385 teenagers were followed to find out what factors may predispose them to gambling addiction. The results showed that 90% of study participants were not at risk of addiction, while 10% became gambling addicts. It turned out that the key factor in the onset of gambling addiction is a low level of prosocial behavior. Teenagers with a low level of prosocial behavior do not show interest in the help and support of others, which can lead to a loss of contact with the real world and a deepening dependence on virtual reality offered by computer games. Based on these results, scientists ... >>

Traffic noise delays the growth of chicks 06.05.2024

The sounds that surround us in modern cities are becoming increasingly piercing. However, few people think about how this noise affects the animal world, especially such delicate creatures as chicks that have not yet hatched from their eggs. Recent research is shedding light on this issue, indicating serious consequences for their development and survival. Scientists have found that exposure of zebra diamondback chicks to traffic noise can cause serious disruption to their development. Experiments have shown that noise pollution can significantly delay their hatching, and those chicks that do emerge face a number of health-promoting problems. The researchers also found that the negative effects of noise pollution extend into the adult birds. Reduced chances of reproduction and decreased fertility indicate the long-term effects that traffic noise has on wildlife. The study results highlight the need ... >>

Random news from the Archive

Bluetooth watch 22.11.2006

Sony Ericsson and Fossil have joined forces to develop Bluetooth watches.

The MBW-100 model is designed to work in conjunction with a mobile phone and receives the necessary information using a wireless interface.

The watch has a regular analog dial, which gives it a classic look. but below it is a small OLED screen that displays information about Bluetooth operation, incoming calls and messages. By pressing the buttons, you can control the reception of calls and the music player.

The case is made of stainless steel, there will be a black version (which has a limited edition).

Other interesting news:

▪ Mice recognize rats by the smell of tears.

▪ GIGABYTE GB-BNi5G4-1050Ti barebone system

▪ Battery on gastric juice

▪ All the most valuable companies in the world are from the IT sector

▪ Luminous electric car charging cable

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Cultivated and wild plants. Article selection

▪ article by Al-Farabi. Famous aphorisms

▪ article Which parasitic tree can cut underground telephone cables? Detailed answer

▪ article Measurer, inspector of materials, patterns, products. Standard instruction on labor protection

▪ article Masses from papier-mâché. Simple recipes and tips

▪ article Mysterious ball. Focus secret

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews