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 theaudiotweak

Roxy..my breaker box is in my audio room 40 feet from my transformer in the side yard. With 2 audio friends in attendance it was clear to me after them saying what ever I was doing is making a nice change..taking the panel off and then putting it back on as the music played. 10 years ago or there about that was. Tom
If you thought about installing a electrostatic filter system then you could have both a topless and better sounding audio system and a house that was virtually dust free. Oh and add some UVC while your at it. All of the above works. Tom
Glupson..yes I knew when I posted. Riddle me this .. What about Dust  Mites? Tom
Mike I agree...same way with my amps. I can easily lift the lids off on both..and hear a  difference . Same with my breaker box in my room with an audience to hear the change while doing so. With all the shielding used to keep RFI and EMI at bay maybe we are containing the RFI and EMI and allowing the pollution to remix with the intended signal..Same for vibration control systems. Without a clear and directed path out the self generated component noise will never leave, it will only be refilled and replaced by more of the same. Tom
Yes I posted about this years ago..its somewhere in my history and history repeats itself everyday.. Interfering Energy...it can be in many forms and types. That is what Mike is hearing when he removes the panels on his amps just as I do on my amps..Some of it is EMI and some of it is shear wave interference traveling from panel to panel back into the system. Tom
Same thing happens when you take the trim panel and door off your breaker box.
Impressive improvement..Tom

Oh well your missing out on better sound 
before you enter the after life..maybe.
There are other non ferrous materials that have vastly higher antistatic properties and are flame resistant that are used in food services and offer a sonic improvement. Tom
Harry ...Tom here in Louisville..part of the way back machine. Just thinking of you yesterday wondering if you might have an extra phono preamp laying around in your collection and how to reach you. Wow!!  Looking at a Citation 17s and rebuild and just use the phono portion feeding my high level input. Preamp pre Beatrice Foods. Tom
I took all the natural lambs wool out of our speakers and cut and glued in the non wood be corners, hard pink and yellow fiberglass blocks used in hvac. This speaker has no 90 degree corners either outside or inside.  Tom