[Picture ]20 It is normal that the left and right channel errors of ordinary computer audio are in db! What is the national standard?

The CTS sedan produced in 2003 was the first time Cadillac adopted the rear drive setting. Previously, Cadillac mostly used front engine/front wheel drive mode. In order to bring a completely different driving experience to car owners who are addicted to driving, CTS is the smallest four-door car in Cadillac brand, which belongs to Catera level and is its successor. In the past, catra cars were all made in Europe, flaunting the European style, but actually did not achieve the expected results. The CTS made in the United States is another way to challenge some famous European foals such as BMW 3 Series and mercedes benz c Class with its bold appearance, superior performance and control. The body with sharp lines and strong mechanical sense is the biggest feature of CTS. This brand-new design concept of "art and science" was gradually brewed in the concept cars such as Evoq, Imaj and Vision of Cadillac Car Factory in the past, and has matured in today's CTS cars. Under the concept of "art and science", CTS sets off simple body lines with vertical headlights and taillights, giving people a bright and strong impression. It integrates the linear and vertical headlights of concept cars such as "Cadillac Vizon" released in 2002 into Cadillac's traditional grid. GM described the Cadillac CTS sports car as a "Cadillac classic model of 2 1 century", which will be the first model to adopt the latest popular concept car shape design. In order to ensure that this new car has no shadow of any other car, the design team decided to make it have strong American characteristics from the beginning. The 3500-pound CTS vehicle has a length of 190. 1 inch, a height of 56.7 inches, a width of 70.6 inches and a wheelbase of 1 13.4 inches, which is based on GM's brand-new rear-drive chassis. Due to the front engine/rear wheel drive configuration, it has a nearly perfect front-to-rear weight ratio of 50/50, so that the power of the rear wheel can also be properly distributed to the front wheel. In addition, engineers used IRS independent rear suspension system on Sigma chassis. Through the five-bar structure, shock absorber with extremely high filling capacity, hydraulic balance system and aluminum alloy auxiliary beam, the vibration during driving is effectively reduced and the accuracy of pavement control is improved. The front suspension is a double fork type. The chassis of this "Sigma" new rear-wheel drive car has been tested and improved many times on the basis of BMW 528i at the German New Bogeling circuit. The car adopts V6 DOHC 24V engine with a displacement of 3.2 liters. The 3.2-liter V6 DOHC 24V engine has a maximum horsepower of 220 HP /6000 rpm and a maximum torque of 30. 1 KGM/3400 rpm. And the 5-speed electronically controlled automatic transmission is used for the first time in all GM products. There is also a 5-speed manual transmission. Because of the installation requirements, the side angle of V6 engine is designed to be 56 degrees, which is quite different from the 60-degree design of general V6 engine. The compact structure not only saves the space of engine compartment, but also improves the efficiency of air intake and exhaust, which makes CTS have excellent acceleration and environmental protection performance. Chevrolet and V8 engine. This all-aluminum 5.7-liter Gen-3 small cylinder engine has defects in cam, valve and booster. The maximum power of CTS-V is 400 HP at 6000 rpm and 527 Nm at 4800 rpm. The power and torque difference between CTS-V and Chevrolet C5 Z06 is 5. Five-speed manual transmission is the standard configuration of CTS, but it is not an ordinary transmission. It is produced by Getrag company in Germany, and the power of CTS is specially adjusted, which brings keen acceleration and sharp shift for drivers. According to the test data released by the factory, the 0-60 mph acceleration time of CTS five-speed manual transmission model is 6.9 seconds. In addition, the owner can also choose a five-speed automatic gearbox with sports mode switching, which is simple to control. GMPD (General Motors Performance Distribution) makes the front suspension and skeleton of CTS stronger, thus controlling the higher power and torque of V-series. The front frame is made of hydroformed steel with higher specifications, and the diameter of the hollow front anti-roll bar (26.6 mm) is 3.6 mm thicker than that of the standard car. The stiffness coefficient of the spring is increased by about 27%, the single-tube shock absorber is also increased by about 10 mm, and its valve is also improved. The steering gear has been improved, which has more accurate steering adjustment and fast response performance. These improvements have less steering feedback, so the steering road feeling is not obvious. In order to make the steering feel reach the level of European cars, CTS adopts double A-arm front suspension, and a rack-and-pinion steering system is installed in front of the center line of the front axle of the frame, and the frame is directly connected with the car body without rubber pads, which reduces excessive damping materials and improves the resolution of road feedback. CTS is also equipped with an improved ABS braking system, and the tracking control system on Corvette is the standard equipment of CTS. This system can overcome all kinds of wheel slip in 1.5 seconds, apply brakes or slow down the engine output as needed, so that the wheels can regain their grip. The start button of the tracking control system is placed in the toolbox next to the driver's seat to prevent accidental touch. As an optional item, the body dynamic stability system of StabiliTrak 2.0 has the function of measuring and judging the steering angle and deviation of the vehicle. When it is found that the driver's reaction is different from the actual running route of the vehicle, the system will apply braking force to the four wheels respectively, so as to dynamically repair the body to the driver's expected situation. The start button of the StabiliTrak 2.0 system is also hidden in the toolbox. Luxury and comfortable interior is the normal expectation of Cadillac brand, but unlike the DeVille and Seville cars that Americans remember, the interior layout of CTS is still very European. The large center console that echoes the appearance is no longer made of wood, but is replaced by high-quality black plastic, with a small amount of nuclear wood dotted with three steering wheels, blocking heads and door trim panels. The shape of the center console is vertical, similar to the main console, with embedded CD entry and DVD navigation system (with optional configuration). The vertically arranged buttons are not complicated, and the relevant control information is displayed by the central color screen. CTS front leather seat provides eight-position electric adjustment function, with lumbar support and movable headrest, which can be used for position memory with steering wheel. There are four buttons on the three-spoke steering wheel to set their own functions, so that drivers can choose their own programs to control many functions on the car, such as turning on and off the tracking system, answering and hanging up the phone, adjusting the air supply angle, and preset dual-zone constant temperature air conditioning. In addition, there is a round button on the right side of the steering wheel, which is specially used to control the car stereo. Before adding Luxury and Luxury sports kits, Bose seven-channel 200W AM/FM/ cassette /CD stereo (with RDS radio data system, which can provide additional text information) is the standard configuration of CTS. As we can see from the picture, the headlights and taillights of CTS are upright, which makes the overall shape of CTS feel quite balanced. The water tank cover of the front of the car abandoned the American luxury style and adopted a large sports style in an attempt to attract young personality elites. The body length/width/height of CTS is 4828/ 1795/ 1422mm respectively, which is equivalent to Mercedes-Benz E-Class, but the wheelbase of CTS is 2880mm, which is much larger than that of E-Class, so the compartment space will be quite spacious. CTS-V is also equipped with 18 inch wheels, all made of P245/45WRl8 rubber. It seems that seven huge spoke alloys will fill these rim grooves. Cadillac is smart. They provide V series with the most popular colors in the automobile industry: black and silvery white. The interior color can be pure black or light neutral color, and the aluminum plating in key parts is elegant and beautiful, which can eliminate the monotony of the steering wheel and center console. However, if the appearance can be compared with the brand-new BMW design because of its exotic flavor, the interior is more like the rigid German BMW of 19 in the 1960s and 1970s. Even on the snake-shaped two-lane road, the leather sheepskin seat of CTS-V can make the driver and the front passenger position well, and the adjustable waist control eliminates the fatal defect of the standard CTS seat. Some people may find that the front seat of CTS-V is too hard for daily life, but people who sleep on hard mattresses will like to drive longer distances because of such seats. In order to completely match its power performance with its luxurious appearance, GM aimed at the BMW 528i of the same class when designing the power system for the car, and tested and improved the high-strength chassis in Nurbein, Germany, the most challenging racing track in the world. And for the first time, GM used the same 5-speed manual electronic control gearbox as BMW 5 Series on CTS, which is durable and smooth, with clear and smooth gears and excellent hand feel. In addition, GM adopted full 5-speed engine braking for the first time, which made the electronically controlled transmission feel the same as manual downshift. CTS-V doesn't sound enough to attract customers with extensive influence, but once you release the clutch and step on the accelerator, the loud and beautiful sound of V8 engine will never make you feel uncomfortable. Like M5, this car announced his arrival in a heroic way. Of course, this car has an excellent driving feeling when shifting gears back and forth between corners and gears on the runway. It is also an American luxury sports car with V8 engine. However, he felt that he was not ready to accelerate, and it was difficult to start in the speed range of 2500-2800 rpm, which led to the interruption of acceleration, and then the tire friction noise was interrupted, leaving only small black squares on the road surface instead of unique black stripes. CTS-V has taken measures to make up for the defects. It has a general-purpose traditional sports car with typical wide tires. It really runs like a big sports car, not a huge American private car. Like the BMW 5 Series, CTS-V has a good driving experience even on the rugged roads in Detroit. Its suspension is getting harder and harder, and it shakes a little at the beginning of the turn, but then it will be as hard as concrete, and the performance of winding piles and sharp turns brought by it is beyond the reach of many models. He is one of GM's best production cars. The steering system responds quickly and directly, and has a good sense of road. This car became the first new car assembled by GM's newly-built Lansing Grande River (LGR) plant after 1986 (Lansing, Michigan, USA). After Concours d'Elegance, the car will participate in international auto shows around the world, and then be listed in North America, Europe and Asia. LaNeve, general manager of Cadillac brand, said that there are more and more entry-level luxury car models on the market, such as BMW 3 Series, mercedes benz c Class, Audi A4, Volvo S60 and lexus ES300. These cars are more and more similar in design, size, price and configuration, but if we put these cars together with CTS, we will immediately find how different CTS is. Whether you like it or not, it will definitely leave the deepest impression on you. Of course, the performance of CTS is equally outstanding. LaNeve said that performance is a big problem for entry-level luxury cars, and BMW has been very successful in this regard. Almost all the entry-level luxury cars listed above have entered the China market. Audi A4 and BMW 3 Series have been made in China, and now mercedes benz c Class and Cadillac CTS will also join the ranks. Finally, it is pointed out that Cadillac has made great progress in vehicle research and development, and CTS is the most sporty American car. However, the details need to be fine-tuned, such as walking mechanism and steering gear. Interior space is the obvious weakness of this car. +Complete functional configuration and wide field of vision. -The space inside the car, including the luggage compartment, is very small, and the craft quality is average. +The seat is comfortable, the driving noise is low, and the damping effect is basically satisfactory. -Poor absorption effect on transverse joints and short-wave pavement. +Automatic gearbox is smooth. -The engine is not smooth enough and the power is average. +Strong tracking ability and strong cornering maneuverability. -The steering wheel is prone to shake due to bumps. +Good braking effect and excellent body stability control system. -Body stabilization system is an expensive option. -High fuel consumption, and the emission only meets the Euro II standard. As a member of Cadillac V series, CTS-V CTS-V is an extraordinary luxury coupe with V8 engine. The test of CTS-V was completed in New Bogeling. The total length of the Northern Circle of New Bogeling Circuit is more than 22km, which surrounds the German Eiffel Mountains. There is a huge gap between the track and the track, which is full of all kinds of challenging corners, so many high-performance cars from all over the world gather here for testing. The R&D team of CTS-V has established strict training and safety procedures for testing vehicle performance. Especially in the durability test, the chassis and system of CTS-V have experienced the tests of bumpy roads, challenging corners and high-speed dodge. On May 9th, 2008, CTS-V set a lap speed record of 7 minutes, 59.32 seconds for a luxury car with traditional tires. Compared with CTS-V currently on the market, this record-breaking vehicle has increased safety facilities and increased vehicle weight. John Heinricy, one of the engineers of CTS-V, set a record in driving this car. At present, CTS-V's competitors are mainly some high-performance coupes, such as Mercedes-Benz E63 AMG and BMW M5. Cadillac, an elite product, contains three elements: the shape of driving speed, the chassis of vertical and horizontal track, and the infinite shocking power. The appearance of Feichi is different from any other brand. Cadillac has always been unique in its design to reflect its eye-catching style. V-series continues the well-received new CTS model and carries it forward. The front mesh air intake grille is the iconic design element of V series. The air intake grille is divided into two pieces, which can double the ventilation. The cooling hole of the brake disc is unique, which is inward from the fog lamp and faces the braking part. Starting from the front grille, the exquisite design of the car body improves the aerodynamic performance, and at the same time, the car body is reduced by 15 mm compared with the standard CTS. The high-position brake light installed on the trunk lid plays the role of rear spoiler, which improves the wind resistance and the high-speed stability of the vehicle. The middle part of the hood is raised to accommodate the supercharger located at the top of the engine. When the vehicle accelerates, the red "track display" on the LED dashboard of CTS-V will continuously track the swing of the pointer. The vehicle information display adds some information about the vehicle performance, such as the G meter for recording the lateral peak acceleration and the pressure gauge for tracking the output of the supercharger. The facilities in the car are luxurious: the advanced obsidian interior, the whole instrument panel, the door interior and the center console are covered by the professional hands of master. Every CTS-V has a tailored sense of luxury, and it is also the highest quality interior craft in the industry. In addition, CTS-V is equipped with electronic parking brake, for example, parking brake can be realized for vehicles parked on slopes. The seat in the car adopts Recaro seat with adjustable 14 direction, which can be adjusted at will with strong support, and is equipped with an extended cushion that can be extended and contracted according to the driver's wishes. The seat itself is compact in design, including an integrated headrest. Steering wheel, seat fabric and gear lever are all microfiber materials similar to suede feel. RECARO is a German company, which is famous for producing car seats. It is famous all over the world for providing automobile and airplane seat products. The company provides racing seats for mainstream car manufacturers. RECARO seats can be seen on all kinds of luxury cars, from Aston Martin to Audi's S and rs series. RECARO also produces aviation seats and seats made by Shinkansen in Japan. ) The development of CTS-V chassis for vertical and horizontal track focuses on the advanced chassis system. CTS-V with dual-mode characteristics can also cope with high-speed galloping and low-speed jogging perfectly. The chassis is based on the standard CTS sports car launched in 2008, and is equipped with the fastest response MRC active electromagnetic ride control in the world. MRC is an electronically controlled suspension system, which uses electromagnetic force to adjust quickly every millisecond. It uses magnetic fluid instead of mechanical valve in shock absorber. Those are very fine magnetic particles suspended in liquid. Under the action of electric charge, these particles are instantly arranged in the fluid like a magnetic field. The stronger the charge, the closer the arrangement of magnetic particles and the greater the damping. The chassis system of the vehicle reads the road information in real time according to various signal inputs. This information is continuously transmitted to the four wheels to adjust the damping change in real time. This state-of-the-art chassis technology was invented by Cadillac for STS cars many years ago. Later, it was applied to SRX, XLR and Corvette sports cars and achieved good results. Ferrari is currently applying a similar system. On CTS-V, Cadillac's R&D personnel have made great improvements similar to the second generation MR technology, achieving excellent body control performance at high speed, while maintaining good balance and handling stability. The special tire Michelin SP2 tire of CTS-V helps to improve its high performance. This tire is widely cooperated by professional teams of Cadillac and Michelin, achieving a combination of good grip and perfect driving performance. The wheel hub is very light, minimizing unsprung weight and achieving high durability. Brembo braking system provides a strong braking force for CTS-V. The bimetal casting process adopted by Brembo combines aluminum and iron, which not only reduces the weight but also ensures good heat dissipation performance, thus ensuring the strong braking force of 6-jaw brake calipers on the front wheel and 4-jaw brake calipers on the rear wheel of CTS-V. Tests in New Bogeling and other racetracks have confirmed the durability and thermal stability of the braking system. (Brembo, Italy is a leading supplier of F/KLOC-0 racing cars, which is famous for its unique advanced technology and high-performance braking system. Founded in 196 1, its business has now expanded all over the world. Many F 1 teams, including Ferrari, use the Brembo braking system. Most international grand prix teams also use Brembo braking system. Like the standard CTS, the tower-to-tower design on CTS-V was applied to the old CTS-V in 2004, and it has been assembled on all CTS, including V series, because of its remarkable effect in strengthening automobile structure, improving steering accuracy and torsional stiffness. Steering system is also an important factor to ensure "dual-mode characteristics". The system can adopt two different modes according to the driver's wishes. It provides smooth performance and quick response under normal settings, but after switching or turning off Stabiltrak, the steering wheel will become slightly heavier to provide a stronger driving experience and faster response. Infinitely shocking power is also one of the important elements of CTS-V. The 6.2-liter supercharged LSA engine on CTS-V can output 556 horsepower, which is the most powerful mass-produced V8 coupe. Even at a fairly low engine speed, the torque output of 747 Nm can be achieved in a wide speed range. The timely high torque output makes the acceleration time from 0 to 60 miles less than 4 seconds. Eaton supercharger is another high-tech equipment, which can continuously output more power to the engine. Its unique and special design makes it run smoothly and quietly. CTS-V's unique supercharger distributes the incoming air and maintains accurate temperature and pressure, and then the output of pressurized air enhances the power of the engine by increasing the intake of the engine. Finally, the engine output is guaranteed to increase by more than 35%. Working principle of supercharger: Before the supercharged air enters the engine, the intercooler below quickly lowers the temperature of the air, making the supercharging more effective. The more the temperature drops, the greater the engine power increases. The gearbox is another key component of CTS-V, and the strength of the automatic gearbox is enough to transmit the super torque output by the engine. The shift control mechanism is tailored for the driver, and a shift paddle is set behind the steering wheel. Toggle the paddle to manually select the gear. Similarly, manual mode selection is also available on the shift control panel. Push the shift lever to the manual mode position, and you can select the gear position by moving it up and down. Once the shift lever is pushed to this position, the vehicle will be set to "sport mode", at which time the vehicle will shift gears faster. A key factor of CTS-V's powerful power is the patented new rear axle design, which can ensure smooth power output. In this design, from the cast iron differential in the middle of the car to the rear wheel, an asymmetrical half shaft design is adopted, and the two half shafts are different in size and thickness. This helps to eliminate the so-called "power jump" phenomenon caused by the rapid acceleration of super sports cars, and can prevent the tires from jumping up and down in order to obtain greater driving force during the rapid acceleration. Model List 3.6 Auto RMB 5 1.8 million