It is no longer necessary to endlessly fiddle with the many knobs on subwoofer crossovers that at the very best only approximate the right response and usually leave the consumer frustrated and feeling inadequate to the task.


Kathy Gornik | THIEL Audio Products


It is no longer necessary to endlessly fiddle with the many knobs on subwoofer crossovers that at the very best only approximate the right response and usually leave the consumer frustrated and feeling inadequate to the task.

Kathy Gornik, THIEL Audio Products

As an addition to a sound system for the playback of music or movie soundtracks, subwoofers hold great promise for increasing the emotional enjoyment and impact of the sonic experience. Subwoofers however, can be quite problematic to listeners with a penchant for high quality audio reproduction for at least two very big reasons:

The first big challenge is to try and integrate a subwoofer into the listening room itself. Subwoofers produce the lowest (and longest in length) frequencies of sound and, therefore, are much more greatly affected by room boundaries. To make matters worse, the typical location chosen by aesthetics-conscious homeowners for their subwoofer is in the corner or against a wall, which exacerbates the boundary interference problem even further. The result is very uneven and unsatisfactory bass reproduction as the sound from the subwoofer interacts with room boundaries and is either reinforced (over-emphasized) or cancelled at different frequencies, depending on the distance of the subwoofer from the walls in the listening space.

The second challenge to overcome is the seamless integration the subwoofer's output with that of the main speakers in the audio system. Although many schemes have been tried, no products on the market have succeeded in providing consumers with an accurate, reliable and simple way to integrate a subwoofer with their individual sound system. The result can be a wholly undesirable sonic presentation constantly reminding you that the low frequencies are being created by a separate, somewhat disconnected output device. Consumers who desire a high fidelity experience from their sound systems often seek to improve the accuracy of the bass in their audio systems due to these real-world subwoofer integration issues.


THIEL Audio has spent the last several years developing a subwoofer system that addresses these points head-on. For the sound aficionado, this news will be heralded with great joy and anticipation.

The room boundary issue is addressed in proprietary (patent-pending) circuitry contained in the amplified subwoofer unit itself that we refer to as SmartSub™ Technology. By the simple adjustment of two knobs on the back of the unit that tells the subwoofer's internal microprocessor how far it is being placed from a side wall and a rear wall, logic circuitry is activated that accurately and effectively corrects those frequencies that would be over-emphasized or under-emphasized due to the reinforcement or cancellations of the boundaries. The result is very smooth, even, accurate bass response that effectively eliminates the unwanted boundary effects of the room, and enables the listener to enjoy unadulterated bass response free from this type of unsettling distortion.

It is worth noting at this time that there is an additional feature of the THIEL SmartSub™ Technology employed within the circuitry of the subwoofer unit that eliminates sonic compression due to heat. It is a characteristic of all subwoofers that as driver voice coils heat up under demanding conditions the response of the system changes for the worse. This disappointing compression scenario occurs at precisely the time when the listener would least want it to, such as in a dramatic orchestral tympani drum crescendo or a climatic explosion in a movie drama. THIEL addresses this problem by adding a thermistor (thermometer-type device) at the voice coil that, in conjunction with our patent-pending circuitry, correctly compensates for the reduced output by providing the right amount of power from the amplifier at the critical times. The result is an effortless, accurate and full bass response that doesn't disappoint even under the most demanding of conditions.

When subwoofers are added to an existing audio system, there are no means available that can accurately take into account all the performance parameters of both the new subwoofer and the original main speakers that would allow them to seamlessly blend together for a coherent and realistic sonic presentation.

THIEL addresses this issue with our SmartSub Technology™ in a stand-alone electronic unit called the THIEL Integrator. With two patents pending, it affords consumers an intuitive and easy way to achieve a perfect blending of the THIEL Subwoofer not only with THIEL main speakers, but also with virtually any loudspeaker available on the market.

The THIEL Integrator works by prompting the user through easy and intuitive steps to "tell" the Integrator features of the main speaker system. These include the type of main speakers (sealed or reflex), the -3db point of the speakers, their efficiency, and their damping factor. These numbers can be easily obtained by visiting the THIEL website and doing a quick search for a wide variety of speaker makes and models or they can be found on the manufacturer's original specification sheet.

Once the Integrator "knows" this information, and the user also "tells" it other aspects of the system such as whether or not there are mono or stereo subs, which crossover frequency is desired, and how low the user would like the system to go, the Integrator then executes an infinitely variable and absolutely accurate calculation to correctly blend the THIEL subwoofer seamlessly with the main speakers. The results are truly astounding. Virtually any loudspeakers can sound like a full range sound system with realistically accurate, deep, and satisfying bass response and a coherent and life-like overall sonic representation.

It is no longer necessary to endlessly fiddle with the many knobs on subwoofer crossovers that at the very best only approximate the right response and usually leave the consumer frustrated and feeling inadequate to the task. The THIEL Integrator has eliminated the guesswork and at the same time guarantees a proper and accurate overall system response.

Through extensive research and development, THIEL subwoofer technology eliminates the mystery but delivers the magic!

The content & opinions in this article are the author’s and do not necessarily represent the views of HomeToys

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