SVS PEQ Controls

Page 10

SV Subwoofers

This disc allows the user to play 10Hz through 98Hz in one hertz increments allow- ing very good resolution over your measurements. Other good examples for test discs are Avia’s Guide to Home Theater . When measuring the room’s response use a minimum resolution of 5Hz. Figure 3 on the previous page shows a theoretical illustration of a room’s response.

Before you plot your results however, it’s important to note the Radio Shack sound meter is not totally "linear" in its accuracy down low. All similar meters are off by the similar amount depending on the frequency; so while its sensitivity below 20Hz is not what it is at 50Hz, there is a simple way to compensate for this deficiency. It's called a compensation chart.

Simply look to the below frequencies and add the required decibels (dBs) at the fre- quency in question. So if your system seems to be measuring 70dBs with a 20Hz tone, then really it's putting out 77.5dBs. This is a VERY substantial difference, roughly TWICE the acoustical energy, requiring several times the amplifier power to achieve. You can see then how critical the below chart is if you are using your PEQ to even out or “flatten” the room response of your bass.

Add the following to your measurements:

10Hz add 20dBs 12Hz add 16.5dB 16Hz add 11.5dB 20Hz add 7.5dB 25Hz add 5dB 31.5Hz add 3dB 40Hz add 2.5dB 50Hz add 1.5dB 63Hz add 1.5dB 80Hz add 1.5dB 100Hz add 2dB 125Hz add .5dB

Explanation of the controls. Now that we understand how to measure the room’s response the next step is to correct the problem areas with the parametric equalizer. Before we start turning the controls we need to understand what the ad- justments are and how they work (the controls of your SVS may be arranged differ- ent than pictured).

“Q”. This control determines how wide the correction will be. Each “hash mark” on the amp’s front plate represents 0.1 octave adjustments. The “HI” mark is equal to 0.1 octave (narrow) and “LO” mark is equal to .9 octave (wide). In Figure 3 the highest peak is located at 40Hz and becomes flat again at 50Hz (the Highest Fre- quency of the peak). To determine the Q adjustment the following formula is needed. More on “Q” in a moment.

Formula 1 (Highest Frequency [X] – Center Point [Y]) Center Point (Y)

PB12-Ultra, PB12-ISD/V, PB12-Plus specifications

SV Sound has made significant strides in the world of high-performance audio with its acclaimed lineup of subwoofers, including the PC12-Plus, PB12-Plus, PB13-Ultra, SB13-Plus, and PC13-Ultra. Each model is designed to deliver unparalleled sound quality and an immersive listening experience, making them ideal for both home theaters and music enthusiasts.

The PC12-Plus is a compact, ported subwoofer that boasts a 12-inch driver capable of producing thunderous bass. Its cabinet design optimizes airflow, reducing distortion while enhancing low-frequency output. The built-in amplifier delivers 300 watts of continuous power, with peak output reaching up to 700 watts, ensuring that every rumble is felt as much as it is heard. The PC12-Plus is also equipped with adjustable phase control and low-pass filters, allowing users to finely tune their bass response based on their room acoustics.

The PB12-Plus features a similar design but emphasizes portability and efficiency. Also utilizing a 12-inch driver, it emphasizes the ability to generate room-filling bass without compromising space. The built-in amplifier matches the PC12-Plus in power, promising rich low frequencies ideal for both cinematic action sequences and music playback alike. Its robust cabinet construction allows for minimal vibration and resonance, maintaining clarity in sound reproduction.

For those seeking uncompromising power, the PB13-Ultra is a standout. This subwoofer features a larger 13.5-inch driver and an impressive 1000 watts of continuous power, peaking at 3700 watts. This model is engineered for serious enthusiasts who demand deep-reaching bass extension, and it excels in both music and home theater settings. The advanced DSP technology provides users with precise control over the subwoofer’s settings, allowing for an incredibly adaptable performance.

The SB13-Plus is a sealed subwoofer that excels in delivering tight, accurate bass response. Its design minimizes distortion while maximizing punch, making it an excellent choice for music lovers who appreciate precision. This subwoofer is equipped with similar power specs to the PB12-Plus, offering 300 watts continuous and 700 watts peak power. Its compact design makes it versatile enough to fit in smaller spaces without sacrificing sound quality.

Finally, the PC13-Ultra combines elements from its predecessors with upgraded specifications. Featuring an ultra-long-throw 13.5-inch driver and an expansive amplifier setup, it can produce overwhelming bass that resonates throughout larger spaces. It incorporates advanced room correction technologies, ensuring optimal performance regardless of placement.

In summary, SV Sound’s PC and PB subwoofers are characterized by their robust design, powerful amplifiers, and advanced technologies. Each model serves unique needs, offering powerful bass while maintaining clarity and precision, from compact designs for finesse in smaller spaces to large models that dominate in larger environments.