Hifonics ZXR500/4E amplifier

Hifonics ZXR500/4E Amplifier

The ZEUS E-Class series expands the proven ZXR line with very modern and highly efficient Class D models. These "Expansion" amplifiers impress with enormous power in exceptionally compact heat sinks. Upon their debut in Car & Hifi magazine (issue 1/2025), they impressed the editorial team so much that the entire series received the prestigious PRODUCT OF THE YEAR 2005 award.

The ZXR500/4E is a very compact amplifier providing good performance and quality sound output. With high-level inputs, Auto Turn-On function, and adjustable crossovers up to 5 kHz, it is very versatile and easily integrates into various systems. Thanks to EPS® (Error Protection System) technology, it is also fully compatible with modern vehicles equipped with diagnostic systems.

For more demanding users, the ZXR1200/4E model is suitable, offering 4 x 300 W RMS in a compact format with dimensions of only 27 x 15 cm, providing enough power for practically any speakers.

Main Features

• Advanced Class D technology with very high efficiency.
• Selected and audiophile-tuned components.
• Aluminum cast side panels.
• High-level inputs with EPS® (Error Protection System).
• Automatic turn-on function, ready for Start/Stop systems.
• IFT (Interference Free Technology, tested for electromagnetic compatibility).
• Blue backlit logo panel.

About the Brand

Hifonics is one of the world legends in car audio. Since its inception in the 1980s, it has been defining standards in automotive sound systems and is a strong player in the amplifier, speaker, and subwoofer segments. The brand is known for its uncompromising philosophy - combining top performance with precise craftsmanship and distinctive design. Hifonics products appeal to all customers, from demanding audiophiles to enthusiasts who want to experience deep bass and maximum dynamics in their vehicles. Hifonics amplifiers are renowned for their high stability, clear sound, and enormous power potential. The speakers and subwoofers also excel in precise craftsmanship and long-lasting durability even under extreme loads. Hifonics continuously innovates its products. Modern technologies, such as hybrid puffer capacitors, extremely rigid carbon membranes, MICA composite membranes, or advanced cooling, push the boundaries of sound even further. Alongside top-notch amplifiers, the portfolio also includes practical accessories from remote bass controls to mounting accessories and design protective grilles. If you are looking for a proven brand that combines a legendary name with modern technologies and top sound, Hifonics is the right choice for your car. Treat yourself to superior performance that you can feel firsthand - with Hifonics, you'll always be a step ahead!

Catalog number	ZXR500/4E
Brand	Hifonics
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.	4
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 75 / 2 x 250 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 125 W
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.	< 0.02 %
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.	107 dB
Input sensitivityIn order for the amplifier to perform its function correctly, it requires an input signal of a certain level, which is different for car radios. It is measured in "Volts" (e.g. 2 V, 4 V, etc.) The higher the value at the output of the pre-amplifier, or car radio, the less demands are placed on the power of the amplifier. However, the amplifier must allow this input sensitivity, and for that reason this value is also given for the amplifier.	5 - 0.2 V
High pass filter (HPF)HPF / HP or The "hi pass filter" offers the option of setting the amplifier using a potentiometer so that medium, possibly mid-bass and treble frequencies play upwards from a certain frequency. Example: Amplifiers most often have an HPF from 40 to 300 Hz. If we set the potentiometer to a value of approx. 150 Hz, the sound will be clipped so that it plays frequencies from 150 Hz up to the maximum upper limit of the entire frequency range of the amplifier, perhaps up to 20,000 Hz. We recommend setting this potentiometer in the range of 80-160 Hz. Thanks to this setting option, the speakers can handle a higher performance, as you will not overload them with bass in the lower frequency range.	50 - 5000 Hz
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 - 5000 Hz
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.	> 300
The value of the fuses on the amplifierFrom the value of the fuses on the amplifier, you can get a true picture of the real performance of the amplifier.	2 x 30A
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
Socket input terminalsFerrule terminals allow better wiring contact to the amplifier. It is also a more secure form of terminals. If you are tightening the sleeve terminals, we recommend retightening them after 1 day, as the connected cable gradually compresses.	Yes
Input for wired remote controlIf the amplifier has a remote control input.	No
Dimensions of the amplifier	150 x 50 x 253 mm