Tag Archives: woofer

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.

Building beasts

Building speakers is way different than electronics. For one thing, loudspeakers can be handcrafted and designed from scratch, where electronics require cobbling together off-the-shelf parts. No one in our industry is likely to invent new semiconductor physics and apply it to hand made transistors.

The opportunity to design and fabricate every single bit of a product and technology is really stimulating. When senior engineer Chris Brunhaver joined the PS Engineering Team his first task was to wipe the AN3 slate clean and start over. Why? Well, the simple answer is because we’re obsessed engineering nerds and he could. But I owe you a more detailed answer.

Take for example the 12″ servo woofer used in the AN3. In the prototypes we demonstrated at Axpona the maximum linear excursion of that woofer was less than what the 700 watt amplifier driving it could output. This required us to place carefully crafted dynamic limiters on the amp and its servo system so we wouldn’t exceed the woofer’s limits. Sure, it output prodigious bass, but we knew the system was capable of so much more. Scouring the multitude of catalogs from the world’s biggest driver manufacturers didn’t help. Finding that perfect combination of suspension, excursion, BL, voice coil capabilities, and so on proved fruitless.

There was no perfect woofer for our specific application, and why should there be? Driver manufacturers don’t build woofers with us in mind. They make the best general purpose drivers they know how to.

Then, Chris joined our engineering team. The first thing he did was put pen to paper and sketched out a massive new woofer that would not only handle every last watt the power amplifier could dish out but do so within a linear range. The resulting beast is breathtaking. Have a look at the frames being assembled as I write this.

Holy crap this thing is a monster! But, it’s our monster designed specifically for its intended purpose. Every bit of it—from the spider, suspension, cone material and dust cap to the way the lead wires are hand-sewn into the spider’s fabric so they don’t rattle—this beast is perfect for our application. Nothing else in the off-the-shelf-world can compete.

More to follow, but I wanted to share my excitement with you.

We’ll be demonstrating the next round of AN3 prototypes at the upcoming RMAF at the beginning of September.

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.

Not that long ago

While looking at a replacement woofer for a friend of mine, I noticed its huge magnet and metal encasing shield. Ah yes, I thought, the magnetic shield that was all the rage a few years ago.

That shield was needed to protect cathode ray tubes from TV’s which use magnetic steering to position their controlling electron beams. Those electron beams had to be pointed at precise locations to light up different colored phosphors.

Ray tubes! What Buck Rogers technology was this?

Of course, I am referring to the old style television tube known as the CRT: small glowing tubes that grew in color range and size over their 75-year reign. The largest commercially available model was about 45 inches and weighed several hundred pounds. Larger TVs were technically possible but not marketable as the depth, weight, and cost made them difficult to sell. A 50-inch TV would require a 38-inch picture tube and even larger casing, making it near impossible for the TV to fit inside a standard door (let alone be hefted by mere mortals).

CRT televisions were finally phased out as late as the 2000s and replaced by plasmas, LCDs, OLEDs, LEDs, etc. The newer technologies are insensitive to magnetic fields, and thus, the need for magnetically shielded speaker drivers has vanished in little more than the blink of a technological eye.

Still, does any technology sound more high tech and futuristic as a fricking Ray Tube?

Buck would probably shed a tear for the passing of ray tubes into the boring of Light Emitting Diodes, so too would his contemporaries: Flash Gordon, Jack Swift, Brick Bradford, Don Dixon, Speed Spaulding, and John Carter.