Tag Archives: subwoofer

Asheville, Walnut Cove, Biltmore Forrest and Western North Carolina’s Audio and Home Theater specialists present Cane Creek AV and Paul McGowan – PS Audio, Intl.

Likely outcomes

Engineers are like doctors. They mostly spout facts and figures and answer specific questions with specific answers—helpful if that’s what you are looking for, but rarely do they give you the big picture.

For example, if we’re in a discussion about designing a practical subwoofer system and I say, “It seems this driver is really inefficient. How many watts are we going to need to drive this thing?” That’s a very specific question with a much broader implication. One engineer might answer “4,000 watts” while another might respond, “4,000 watts, which of course is not going to work because you cannot get that out of the wall socket”.

Adding that last little piece of information, which tells us specifics followed with likely outcomes, is the key to understanding, yet so often missing in today’s world of hyper information.

If you’re visiting your doctor because you have a cold and ask, “is it alright to take this medicine?” many will give you a straight yes or no. The better answer might be, “sure, though it won’t help curing your cold.”

How often do I get asked if this or that is the right amplifier for them? “Is the BHK the best amplifier you know of?” An easy reply is “Yup”, but a more helpful answer might be, “Yup, depending on what you’re trying to achieve.”

Doing our best to rise above the specifics to understand the big picture is often tiresome, but always worth the work.

 

Asheville, Walnut Cove, Biltmore Forrest and Western North Carolina’s Audio and Home Theater specialists present Cane Creek AV and Paul McGowan – PS Audio, Intl.

A very good explanation of bass!

Thud

Isn’t it interesting that bass slam and quality comes not from woofers but instead from above?

Here’s what I mean by that. If you take a 3-way system like the IRSV, where the middle frequency drivers reproduce frequencies down to 100Hz, what you find is that bass impact and speed is determined not by the woofer towers, but rather the midrange drivers. Which is why we can accurately evaluate the bass performance of a power amplifier without that amplifier powering the woofers.

This applies not just to big systems like the IRSV. Just about any 3 or 4-way system will work the same way. Listen only to the woofers while music is playing and what you hear on a plucked bass note is little more than a dull thud. There’s no slam or impact to that sloppy thud because the frequencies that give the feeling of speed are much higher than the lower notes.

You can also listen just to the output of a subwoofer and get the same result: whoomp, whoomp, thud, thud.

It’s the upper ranges of bass that give us the impression of a fast woofer.