Adjusting the controls

There are two main methods for adjust- ing the level, crossover frequency and phase of the SunÞre Subwoofer to match

asystem:

•Bob Carver’s preferred method: By listening and making the adjustments to suit your taste.

•Laboratory method: By measuring the output and adjusting for a ßat frequency response.

Excellent results can be obtained if you make the adjustments based on simply listening. This is SunÞre’s preferred meth- od as it allows the system to be voiced based on what sounds the best, whereas laboratory-ßat frequency response can often be clinical and less than exciting.

The following procedure is for those who prefer a more methodical and scien- tiÞc approach. This excerpt is from “The Audio Critic,” issue 24, page 31, written by contributing editor David Rich, and is reprinted here with their kind permission.

You will need a test CD with low-fre-

quency warble tones, and a sound pres- sure-level meter. The Radio Shack® SPL meter will do Þne, as will the Stereophile® test CD.

“Step 1. Disconnect the subwoofer and run the main speaker with a tone in its passband (80-100Hz). Measure the level.

Step 2. Disconnect the main speaker and reconnect the subwoofer. Set the subwoofer to its highest crossover frequency. Set the level control of the subwoofer to give the same sound pres- sure level with the same tone you used in Step 1.

Step 3. With both the subwoofer and the main speaker connected, measure the level of the tones at the available frequencies. Because the crossover is set too high, you will have a peaked response. Adjust the crossover control to get the smoothest response.

Step 4. Use the phase control to make the response even smoother. It has its biggest effect at the crossover frequency. You can iterate between the crossover and the phase controls. Keep your hands off the level control! It was set correctly in step 2.

Step 5. Listen to the subwoofer. Resist all temptations to turn up the level control. Play something with really deep bass to conÞrm that your subwoofer is working.”

Control settings

Use this drawing to record some of your favorite settings.

18 User's Manual

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Sunfire 12 user manual Adjusting the controls, Control settings
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12 specifications

The Sunfire 12 is a state-of-the-art subwoofer designed to deliver unparalleled audio performance for both music lovers and home theater enthusiasts. Known for its deep, powerful bass response, the Sunfire 12 has become a popular choice among audio engineers and consumers alike. This subwoofer embodies a blend of innovative technology and practical design, making it a standout option in the competitive subwoofer market.

One of the hallmark features of the Sunfire 12 is its impressive 12-inch high-excursion driver. This driver is engineered to move more air than typical subwoofers, resulting in profound low-frequency output. The driver is complemented by a unique Dual Voice Coil design, which allows for greater control and improved linearity during operation, ensuring that dynamic audio passages are reproduced with precision.

The subwoofer also incorporates Sunfire’s patented "Tracking Downconverter" technology. This advanced power supply design ensures that the Sunfire 12 can deliver consistent power output, even during the most demanding audio peaks. The result is a dramatic increase in efficiency, which translates to powerful bass without distortion, even at high volumes.

Another notable characteristic of the Sunfire 12 is its compact size. While it delivers deep, resonant bass, the subwoofer's enclosure is significantly smaller than traditional models. This compact design allows for flexible placement in a variety of home environments, making it an ideal choice for those with limited space. The elegant aesthetic of the enclosure ensures that it can blend seamlessly into any room décor.

The Sunfire 12 also features a sophisticated set of adjustable controls. These allow users to fine-tune the subwoofer’s performance to match the acoustics of their space, ensuring optimal sound quality regardless of the room’s dimensions. The built-in crossover and phase control further enhance the ability to integrate the subwoofer with existing sound systems, allowing for a customized listening experience.

With its robust construction and cutting-edge technologies, the Sunfire 12 sets a high standard for compact subwoofers. Whether for music playback or home theater applications, the Sunfire 12 delivers an immersive audio experience, making it a top choice for discerning audiophiles seeking powerful bass without compromise.
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