Hertz CP 5.1K amplifier
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Amplifier Hertz CP 5.1K
Hertz proudly presents the new Cento Power amplifier series, designed for those who demand high performance and uncompromised sound. Cento Power amplifiers perfectly complement Hertz's Cento speakers, creating a harmonious synergy and unleashing the full potential of your audio system. These amplifiers are built on the latest Advanced D-Class (ADC) technology, offering excellent efficiency with a compact and elegant design. Thanks to the USS (Universal Speaker Simulator) feature and a wide operating voltage range, these amplifiers can be easily integrated into both traditional and modern cars, including electric vehicles. Whether you're upgrading your car's audio system for crystal-clear sound or deep, immersive bass, Cento Power amplifiers will meet your highest expectations.
Latest D-Class Technology
All models in the Cento Power series feature Hertz's innovative Advanced D-Class (ADC) technology. This allows for peak performance with over 85% efficiency, reducing heat and energy consumption while maintaining exceptional sound clarity. The compact die-cast aluminum chassis offers durability and an elegant aesthetic, fitting perfectly into any car setup.
Modern Design and Compatibility
The design of Cento Power amplifiers is as impressive as their performance. The amplifiers are very compact, making them easy to install in the ever-shrinking spaces of modern vehicles. A sleek LED status indicator, massive machined terminal block, and a removable top panel that protects controls and connections contribute to a sophisticated design. With built-in USS (Universal Speakers Simulator) technology, Dieci Power amplifiers can be seamlessly connected to head units with speaker load detection, which monitors the presence of low-impedance loads, allowing for audio output connections. USS adapts input sensitivity from 1.6 to 40 Vrms for compatibility with new SB-class head units.
Extensive Sound Adjustment Options
Easily accessible controls on the top panel provide instant access to all settings even after installation. Thanks to the balanced input circuits of Pre-in and Speaker-in inputs, you can enjoy a high level of noise suppression, enabling clean signal transmission without interference. A complete set of controls, including adjustable input levels, low-frequency crossovers (50 ÷ 250 Hz @ 24 dB/Oct.), a subsonic filter (25 Hz @ 24 dB/Oct.), and bass boost, provide users with flexibility in fine-tuning the sound to their preferences.
Exceptional Connectivity
Convenience meets intelligence with the automatic remote turn-on/off feature, seamlessly triggered by the OEM radio's speaker outputs. This ensures smooth operation and an efficient power management system. The optional HRC 02 Remote Control allows for subwoofer level adjustments at your convenience. Whether using Speaker-In or Pre-In level inputs, Cento Power amplifiers feature full-range preamps, offering additional flexibility in system configuration. Designed for easy installation with durable Molex connections and Plug&Play cables included.
About the Brand
The most renowned European brand in the car hi-fi segment? Hertz audio! Founded in 1998 in Italy, Hertz is a brand under Elettromedia, which also owns Audison and Connection. How did the name Hertz come about? Hertz - the unit of frequency, number of cycles per second (Hz). Everything in Hertz car audio reflects their passion for music and their commitment to quality in every product they create. Over the years, the company has built an outstanding team of talented and dedicated engineers committed to designing top-level products. Every new project and product is primarily based on the needs of the brand's fans, developed to connect them directly with the emotional power of music. Hertz's philosophy is a unique combination of premium sound, vibrant tradition, clever innovation, and high quality, combined in a complete range of products for maximum customer satisfaction. Hertz offers a complete product line of speakers, amplifiers, and subwoofers that let you experience the thrill of high-quality sound in any situation. Deep knowledge of car interior acoustics, design requirements, and manufacturing processes keeps Hertz products at a high level. To achieve Hertz's high-quality standards, the company doesn't settle for testing samples from each batch: it uses the most advanced testing tools for analyzing each component, monitored by highly qualified personnel. This results in an extremely low percentage of complaints and high quality for all Hertz products.
| Catalog number | CP 5.1K |
| Brand | Hertz |
| Links | Official web presentation |
| Energy class of the amplifierAmplifiers are divided into two basic classes: analog and digital . Analog amplifiers (A/B) have higher consumption requirements, but usually have a more natural sound. Digital amplifiers (D) have significantly lower consumption and higher efficiency, but the sound may not be as faithful as with classic analog amplifiers. | D |
| Number of amplifier channelsAmplifiers are divided into: - Monoblocks - 2-channel - 3-channel - 4-channel - 5-channel - 6-channel - multi-channel Each channel is used to power one speaker for the coaxial type, or one side if they are component speakers. Monoblock type amplifiers are mainly used for subwoofers. 2-channel are suitable for both subwoofers and, for example, the front pair of speakers in a car. 3-channel is used for front or rear speakers + subwoofer. 4-channel are used for front + rear speakers or 1 pair of speakers + subwoofer. 6 or 5-channel are used for 2 pairs of speakers + subwoofer, most often. Bridging means connecting the amplifier to a bridge, using the + pole from one channel and the - pole from the other channel. In most cases this is shown as "BRIDGED" on the amplifier. | 5 |
| RMS power into 4 ΩRMS power when loading speakers or subwoofer at 4 Ω. RMS power is the constant power of the amplifier and is one of the most important parameters when choosing an amplifier. | 4 x 80 + 1 x 330 W |
| RMS power into 2 ΩRMS power when loading speakers or subwoofer at 2 Ω. RMS power is the constant power of the amplifier and is one of the most important parameters when choosing an amplifier. | 4 x 130 + 1 x 510 W |
| Frequency rangeThe ability of the amplifier to reproduce the signal from the lowest frequency to the highest = faithfully reproduce the sound in a specific frequency band. Professionally: In the frequency range from 40 to 16,000 Hz, the vast majority of fundamental and overtones (harmonics) of all musical instruments are found. We are interested in the course of the radiated sound pressure in this range of frequencies when the loudspeaker system is supplied with constant power. We call this course the frequency characteristic, which tells us the level of radiated sound pressure in decibels (dB) depending on the frequency. The frequency characteristic of a speaker or speaker system can be expressed most succinctly with a graph. Mostly, however, the frequency characteristic is indicated by indicating the maximum tolerance of the sound pressure in the given frequency range, e.g. 50 to 15,000 Hz -+ 6 dB. Since the frequency characteristics of loudspeakers and systems in general are quite uneven, some manufacturers do not even specify this maximum tolerance of sound pressure in decibels in their catalogs for reasons of prestige. Data impoverished in this way is unfortunately worthless. What is valid is that the manufacturer offers a speaker system with a frequency range of 30 to 20,000 Hz, if he is worried about stating the maximum unevenness of the sound pressure in this range, because he can have a tolerance of, for example, +- 20 dB. The unevenness or undulation of the frequency curve in good speaker systems for high-quality music performance should not exceed +-3 dB in the 80 to 12,000 Hz band and +-6 dB in the 40 to 16,000 Hz band. Greater unevenness already depletes or emphasizes certain tonal areas, which can cause audible or even disturbing distortion. The proportion between fundamental tones and higher harmonics also changes, thereby changing the color of the sound, and individual musical instruments as well as the entire musical image sound unnatural. | 10 - 500 Hz |
| Harmonic Distortion (THD)Total harmonic distortion indicates how much the input signal is distorted in the amplifier. Distortions appear as overtones contained in the output signal. The proportion of originally absent parts of the signal is given as a percentage, typical values are between 0.001% and 0.5%. Distortion is measured in their power band. If it exceeds the limit of 0.7% from a certain power, it is the value of the output power of the given amplifier, from which it no longer plays without distortion and from which the distortion usually increases steeply, so that no further increase in power can be counted on. The lower the value, the better. | 0.01 % |
| Signal-to-noise ratioThe signal-to-noise ratio means that the output signal always contains noise. The signal-to-noise ratio expresses how much of this noise is compared to the useful signal. The so-called A value is given, which does not take deep and very high frequencies into account. This corresponds to the characteristic of human hearing, which is not so sensitive to deep frequencies, especially below 1 kHz. The higher the value, the better the amplifier is. | 101 dB |
| Low-pass filter (LPF)LPF / LP or "low pass filter" offers the possibility to adjust the amplifier using a potentiometer so that the lower band plays only the frequencies in a certain band that you need. This filter is used to adjust the frequency range for the subwoofer, so that it does not overload or distort the sound. Example: Amplifiers most often have an LPF from 20 to 300 Hz. We recommend setting this potentiometer in the range of 45-80 Hz. | 50 - 250 Hz |
| SubsonicA subsonic filter is essentially a high-pass filter for very low frequencies, typically 45 Hz or lower. Anything below this setting is weakened. The point is that the subwoofer does not go below the subsonic filter setting and does not overload itself with very low frequencies. A useful function, if set correctly, the subwoofer is not overloaded. | OFF / 25 Hz @ 24 dB/Oct. |
| Bass boostBass boost or bass enhancement. With this function, the bass itself can be emphasized, at a high level of bass boost, the speakers and the subwoofer can distort a lot and the sound will be worse than better. We therefore recommend using the "bass boost" function wisely. With maximum use of bass boost, there is a risk of damage to the speakers and thus to the subwoofer. | 0 - 12 dB |
| Damping factorDF - Damping Factor . It is the ratio of the load (repro + cables, crossover, etc.) to the internal resistance of the amplifier. The bigger the DF, the more controlled the bass. Amplifiers with a lower DF tend to hum. Subwoofers with a higher Q in the bass reflex and sometimes in the enclosure will also cause humming. | 160 |
| Power supply | 11 - 15 VDC |
| High level inputsThe high-level input on the amplifier allows connection directly to the existing speakers in the car without additional purchase of an external high/low adapter. Important equipment in the case of installing an amplifier on an original car radio. | Yes |
| Automatic on and offThis function allows you to automatically switch on the amplifier. | Yes |
| Input for wired remote controlIf the amplifier has a remote control input. | Yes |
| Remote control included in the packageSome models of amplifiers also come with wired remote controls in the package, which on one side plug into the amplifier and on the other side you have a potentiometer that you can place anywhere in the cabin. A common place to place the remote control is under the steering wheel. The advantage is the regulation of power, and therefore volume, depending on driving conditions and the mood of the crew in the car. | No |
| Dimensions of the amplifier | 255 x 170 x 48 mm |
| Mass | 2.27 kg |
Evaluation
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