Sorry, no more audio servicing. But the shop is doing well!

I can’t make it work. ~or~ I don’t want to do what it would take to make it work. Same difference. There are good reasons that there are so few audio repair techs left, and I do not possess some magical business formula that would enable me to succeed where others have failed.

The techs that actually are succeeding in the repair field, tend to be specialists in one brand, or they have a large and efficient shop with high throughput. I don’t want to specialize, or get large and efficient, or have high throughput. So I have been offering repairs on high-end equipment of various brands. Here’s why that doesn’t work.

  • Each piece requires research. I end up reading all kinds of forums threads and whatnot, just to discover each piece’s particular quirks. Like, is there a particular capacitor that tends to go bad? Or a transistor that gets fried from heat? I end up spending hours and hours on this kind of thing, and there’s no way people are going to pay me hourly rate for doing so.
    And then I might never work on another unit just like it. It’s not a good use of my time.
  • Parts are going obsolete at an alarming rate. I spend too much time tracking down rare and genuine parts.
    I might find myself half-way through a repair, and find myself unable to complete it due to some unobtainable part.
  • Parts are extremely expensive now. The things I buy regularly are up about 60% from 10 years ago, while general consumer inflation is about 40% for the same period. Also, tariffs. :^/
  • QUAGMIRES: This is the big one! This happens to every tech. Some units resist repair, and will have some obscure, intermittent and difficult-to-troubleshoot problem, and because you can’t get parts anymore, it becomes extremely difficult and time-consuming to troubleshoot. Like, for example, “Is this microcontroller going intermittent?” I can’t just swap a new one in and try it! I have to dig much deeper, and spend even more time ruling out other components first. And I may get to the point, where I know it’s the microcontroller, but I cannot obtain one, and the unit is bricked. 🙁 I have now spent a lot of time on a repair, and already charged my customer several hundred dollars. My customer has to either graciously eat the cost, or I have to make a refund.
    Quagmires are why electronics techs are kinda notorious for ghosting their clients. (I would never.)

The circuit board business, however, is doing well, and I am going to lean in to that.

Hoppe’s Brain Shop

And I’m going to invent some new things! Stay tuned.

Chris

DSP Done Dirt Cheap!

How would you like a DSP speaker management processor ~and~ digital mixer for less than the price of a low-end speaker processor like a DBX DriveRack? A LOT less… Like $25? 😲

These Biamp Nexia SP DSP Speaker processors from circa 2008 are cheap and plentiful on the used market. Very high quality and built to last. I got two for $50 on Craigslist! Normally, they’re used in big distributed audio systems, like in conference centers, concert venues, sports arenas, and churches. The Nexia SP Speaker processor is just one part of a whole ecosystem of networked teleconferencing, video conferencing, and distributed audio products.

But they’re great for pro audio applications as well! They just don’t happen to have any XLR connectors. It’s all terminal blocks, as is common in large installed commercial systems. But you can add XLR connections on a patch panel. (Or RCA jacks for a home system. See here for Biamp’s wiring diagrams for unbalanced connections. )

Continue reading DSP Done Dirt Cheap!

Bluetooth KOSS Resto-modded headphones!

OK these are just beyond sick! Wireless Bluetooth version of my Resto-modded Koss DJ Headphones!

And they’re switchable from Bluetooth to wired connection! A removable cord is realized with a mini-DIN plug. The cord features a holder for the 1/4″ adapter, and a section of bungee-cord strain relief.

Continue reading Bluetooth KOSS Resto-modded headphones!

Resto-modded Koss DJ Headphones now in BLACK!

OK, these are just too gorgeous!

These beauties are Koss Pro/5LC, and are basically the same headphone as the Koss Pro/4AA that I resto-modded in a previous blog post.

The Pro5/LC has a squared-off earcup instead of domed, and features level-control dials along the bottom edge. (Thus Pro5/LC) I removed the dials and filled the gap with epoxy putty and painted it to match. It’s hardly visible.

Yes, they are for sale, and yes they are expensive! It’s a entire day’s work for me to build a set of these headphones. I sell the beige Pro4/AA for $550, and these are $600, because of their rarity, and the extra work involved filling the gap left by the removal of the level controls. They come with lifetime earpad replacement for $20, and a $50 flat-rate repair warranty.)

The Koss DJ Headphones, now with a locking headband! (Article has been extensively updated.)

Updated article:
Koss Pro4/AA Headphones resto-modded into great DJ Headphones!

Why don’t all DJ headphones do this? I’ve installed a locking mechanism to the headband on my Koss resto-modded DJ headphones! No more fumbling to adjust while I’m playing. If you buy a set from me, they will now come with this feature.

Koss Pro4/AA Headphones resto-modded into great DJ Headphones!

Did you know that stereo headphones for personal music listening, were invented right here in Wisconsin? In 1958, John C. Koss, and engineer Martin Lange, Jr. invented the Koss SP/3, as an accessory to a new stereo portable record player. The headphones were a smash hit, and proved more popular than the record player!

Continue reading Koss Pro4/AA Headphones resto-modded into great DJ Headphones!