Harman/Kardon Feel700 active subwoofer

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under-seat active subwoofer 7" (165 mm), 125 W RMS, Class D amplifier
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Harman/Kardon Feel700

Harman/Kardon FEEL700 is an active under-seat subwoofer designed for customers who want to significantly enhance the bass performance of their audio system without complex installation or loss of trunk space. Thanks to its very compact design, it fits easily under a seat while still delivering a surprisingly full and energetic bass response. It is an ideal solution for vehicles where there is no space for a traditional boxed subwoofer, but where stronger, deeper, and more dynamic bass is still desired.

A key advantage of the FEEL 700 model is its built-in Class D amplifier with 125 W RMS power and 250 W peak power, offering high efficiency, minimal heat generation, and low load on the vehicle’s electrical system. The subwoofer reproduces deep and powerful bass in the 40 to 150 Hz range, and thanks to adjustable low-pass filter, gain control, and bass boost, the sound can be finely tuned to match the specific installation and cabin acoustics. It also features both low-level and high-level inputs, making installation much easier across different audio systems.

Harman/Kardon FEEL700 also stands out for its practical design. The manufacturer allows series connection of a second unit for even higher bass output without complex wiring. The robust aluminum enclosure combines an elegant look with structural rigidity and good acoustic stability. If you are looking for an active under-seat subwoofer that offers compact dimensions, easy integration, and a clearly noticeable improvement in bass performance, the FEEL 700 is a very strong option.

Key features

Active under-seat subwoofer.
7" (165 mm) subwoofer driver.
Built-in Class D amplifier.
125 W RMS power.
250 W peak power.
Frequency response: 40 Hz – 150 Hz.
15 A fuse.
Maximum current draw: 14 A.
Low idle current below 700 mA.
Low-level input: 0.10 V – 5.0 V.
High-level input: 0.5 V – 25 V.
Adjustable crossover frequency: 50 Hz – 150 Hz.
Crossover slope: 12 dB/octave.
Bass boost: 0 to +12 dB at 50 Hz.
Compact dimensions: 260 × 195 × 58 mm.
Weight: 3.5 kg.
Optional series connection of a second subwoofer for increased output.
Aluminum enclosure with compact design.
Includes wiring harness, mounting brackets, screws, and fuse.

About the brand

Harman/Kardon is a premium audio equipment manufacturer known for its precision engineering, elegant design, and outstanding sound quality. In both car audio and home audio segments, the brand focuses on delivering clean, detailed, and well-balanced sound reproduction with a strong emphasis on faithful music playback. As part of the Harman group, it benefits from advanced acoustic technologies and decades of expertise. Its products are commonly used in premium vehicles and high-end installations where maximum performance, refined design, and uncompromising quality are essential.

Catalog number	HK FEEL700
Brand	Harman Kardon
The diameter of the subwoofer usedThe diameter of the subwoofer that is installed in the active box.	165 mm (7\")
RMS power of the subwooferThe RMS power of an active subwoofer is the constant power that the active subwoofer can play over a long period of time. We recommend following this value. The RMS power of active subwoofers is taken as the RMS power of the integrated amplifier, which in most cases is slightly undersized, which guarantees protection against subwoofer burning.	125 W
Maximum subwoofer performancePeak performance or Max. power that an active subwoofer can play for a moment (approx. 0.5 s), for example when percussion instruments are struck in a recording. But it is not as important a parameter as the RMS power.	250 W
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
Frequency rangeThe ability of the device to reproduce a signal from the lowest frequency to the highest, or the ability of an active subwoofer to faithfully reproduce 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 for reasons of prestige. Data impoverished in this way is 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, i.e. the undulation of the frequency course in good speaker systems for 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.	40 - 150 Hz
Bass boost functionBass 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.	Yes
High level inputThe high-level input on the active subwoofer enables connection directly to the speakers in the car without purchasing an external high/low converter. Use in the case of mounting an active subwoofer on the original car radio.	Yes
Automatic on and offThis function will facilitate your installation and solve the problem of finding a remote signal, which is sometimes a problem with original car radios. The active subwoofer with the Auto sense function can recognize that the equipment in the car is active and turn itself on. A useful and practical feature.	Yes
Cabling included in the packageSome active subwoofers have complete wiring included in the package. In the event that the package really includes complete wiring for connection, we mark the parameter as "yes". If the wiring is not included, it must be purchased.	No
Remote control included in the packageSome models of active subwoofers also have wired remote controls in the package, which on the one hand connect to the active box, and on the other hand 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
Option to purchase a remote controlIf the active subwoofer has a remote control input.	No
Active subwoofer dimensions	260 x 195 x 58 mm