BillFitzmaurice.info

We don't commonly discuss other brands of speakers much here, but I think you'll agree with me that these are something... different. I don't get the vibe that these are snake oil / audiofool / or just plain junk, but I'm also still quite the novice. What do you make of the Walsh Ohms, specifically these custom bracketed "Double Ohms"?

Given the type of driver, I don't consider these a competing brand, but go easy if you think otherwise.


https://www.ebay.com/itm/222620421521

"The unique Walsh driver in operation. A single pulse travels down the cone, reproducing the entire audio range with one driver.

The line of Ohm Walsh speakers use a unique driver designed by Lincoln Walsh. Lincoln Walsh was a brilliant engineer who was part of the engineering team that developed radar during World War II. He later designed audio amplifiers, and his final project was a unique, one-way speaker with one driver. It was a large cone that faced down into a sealed, airtight enclosure. Rather than move back-and-forth as conventional speakers do, the cone rippled and created sound using a principle known as “transmission line”. The new speaker created a single, perfectly rendered sound wave of remarkable clarity."

Looks more like a double Dalek, from Dr. Who

Exterminate. EXTERMINATE. EXTERMINATE!!!

Interesting stuff. My mind's not in the space to dive in at the moment. Good to have it in the library for a future rabbit hole though.

I don't know what it is, but I do know it's not a transmission line. Googling it the Walsh is an omni-directional speaker. These crop up from time to time claiming to give a more lifelike sound. But the sources that are recorded aren't omni-directional, so...

Yeah, I was PRETTY sure that was incorrect lol. I bought a pair of Hegeman omnis, and they have really good sound, in my opinion. I thought I remembered reading that they utilized various length or width rectangular Hemholtz resonators to achieve the bass, but now all I'm seeing is that they're a version of Davids! Folded bass horn below, omni mids and highs on top. Color me confused!

https://www.audioasylum.com/forums/hug/ ... 83247.html

It's similar, but seriously flawed. When you constrict the horn mouth in that fashion it does push the corner frequency down by a few Hz. That's probably why he did it. But it also totally messes up response above that. Also, that's a rear loaded folded horn. They have an unavoidable flaw, a response dip where the front and rear waves meet a half wavelength apart. You can see it on the SPL chart at 125Hz. The David is a front loaded horn. The only rear loaded horn we do is the TruckTuba. It avoids the response dip by crossing over to the midbasses below the dip frequency.

True, I didn't mean to imply they were the same, just had some overall similarities. My Hegemans are on a shelf, but from what I could feel way back by the basement wall, mine didn't seem to have a bottom slot. Weird.

Do you think the wider but slightly shallower dips at 490, 1200 and 2100 would have as much effect on sound quality?

Maybe, but there's not much you can do about them.