Who's Gone Topless?


The idea of this goes back decades. Amps and preamps (for the most part) are designed on chassis free breadboards, then voiced, THEN are packaged inside a chassis, which can be the weakest link to hearing what the designer intended. In most cases the chassis sidewalls and bottom are essential, but the top?


First off, beware that doing so will likely affect your mfg warranty, but, if you live in a pet-free, child-free home, then the benefits can more than offset concerns about something getting in that could harm the components. Case in point my Ric Schultz Class D EVS 1200, dual mono IcePower 120as2 modules. HOWEVER, unlike others using the same or similar modules, Ric then sprinkles many decades of modifying pixie dust all around them which are mounted inside an understated (sans bling) Italian sourced chassis.

When I ordered mine it was mandatory to purchase 2 Cubes ($200) which are to be butted up against each board, requiring the owner to remove the top. After doing so, I was anxious to put it in my rack so I could properly isolate it from bad vibes, when I should have listened with and without the Cubes and top.


Ric is also a proponent of weighing down components, but due to the unnecessarily large chassis, it barely fit in my rack, but I had a 5 pound divers belt lead weight that I squeezed in. Now, because RIc chose to put the mute toggles on the back I placed the amp on the first shelf from the rack's top (but out of sight out of mind: I never mute it when done listening), upon which was my CD player/Transport, which I raised up to provide ~ 2" of air space above the top of the 1200 and the bottom shelf of the player. Even though the rack is open on all sides with plenty of air space all around the rack, the amp ran warm

Fast Forward to yesterday. I was listening to Leonard Cohen Essential songs, mostly instrumentally sparse. I removed the weight; and found the music much more open sounding. Encouraged, I FINALLY removed the top. Honestly, I was not prepared for how HUGE doing so could be. It was like the music went from a confined space to an open air 3 dimensional venue. This is so amazing that I am going to get a handle on it via different music before removing the Cubes. Oh, and the amp is now cool as can be. 


So, if interested, stay tuned
tweak1

Showing 10 responses by geoffkait

Uh, that’s what I said. Hel-loo! I promise I’ll let you win one sometime. 🤗
And speaking of speakers almost all (rpt all) speakers have way too much stuffing inside. It’s like monkey see monkey do 🐒 with these guys. They sound better without any stuffing. But if that little voice in your head says you must use something, use a grapefruit size ball of pure lamb’s wool, hollow fiber.
Being one piece certainly wouldn’t protect it from vibration. And if the Stillpoints worked for the sides and bottom why wouldn’t they work for the top, too?
One assumes the sides and bottom of the preamp were the same solid but thin metal. Wouldn’t they vibrate, too? Were they magic?
Wow, you have six doors? That’s gotta be some kind of record. 🤗
lwal22
I like to enjoy a bit of Cannabis chocolate with my evenings playlist. Expands the soundstage.

>>>>>>But is it expanding the soundstage or your mind? 😳
In Mapleshade’s Pierre Spray’s “laboratory” downtown DC where I demo’d my Nimbus iso platform back in ‘96 all electronics were sans covers (as we say in the biz). Everything was connected together with those really cool 54 ga interconnects and teeny tiny speaker cables. I distinctly recall we tried just barely damping the top plate of the Nimbus with an Indian silk scarf and it degraded the sound. Just thought I’d mention that. Yes, I said 54 ga.
Microprocessors in electronic devices, especially all the ones in CD and Blu Ray players like Oppo, generate beaucoup RFI. So, removing the top metal cover or using a plexiglass cover instead allows the offending photons to exist the component rather than get trapped inside where they can do a number on the signal in wires and fuses. Problem solved! 🤗