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I recently bought a Class D (Pascal) stereo amp and the owner for the company told me he did not think the amp needed any burn-in. I think he may have been correct since I have not notice a change in the sound (brand new build). My Benchmark AHB2 amp did not need any burn-in either.
All other gear I have owned sounded considerably better with burn-in.
Yeah, I thought about sending a note to the mfgr. But having worked in the industry on the sales/consulting side in my earlier days... I can't rule out that something in the past week has not changed. My streaming/dac just processed a firmware update, the weather has changed here in "Cheddar Land", and maybe my ears are clogged...
There are too many variables to discount, before I start pointing fingers at a brand new (and supposedly certified) amp. As a vendor/retailer, I'd be suspect of my situation, before I'd be suspect of the amp.
I'm grateful the mfgr did the repair... cause "letting the smoke out" would have been worse. I don't want to be "that guy".
The first thing I would do is contact the repair person and ask if they replaces the module with the same type? With a different startup delay and sound, I'd be asking a question or two.. You have nothing to loose and maybe a discount on a second module. If they don't sound or work the same way, that's really not in the best interest of ANY stereo system.
It's not fixed... BUT it will work.. I've had to FIX a lot of those repairs in my life. We have a different term for it though.. It's called 1/2 A$$ed.
BUT you have a working system making sound. Certainly better off than you were AND maybe the guy didn't know there would be a difference.
I don't think there was anything malicious, just uninformed.. AND he sure can't fix what he doesn't know about, AY?
Those Blue meters can be spendy. I've owned the MC601s and 1.2s.
My back is hurting thinking about them.. I have vintage Mac gear.. Valve gear.. They are heavy too.. Not Class Ds, where you have to ADD weight.. LOL
So indeed it is the same board. ICEPower 1200AS2. Comparing pictures, the only REAL difference, is the AC transformer has more "vibration isolation goo" packed between the windings and the core/cage.
I'm positive this was just a "board swap". No harm, no foul.
And yeah... MC601's yada... Maybe an MC302 cause I don't need TONS of power/reserve for my particular speakers. But indeed. Heavy. :)
@tmcclintock Yeah, I'm guessing something is different here. After 24 hours of burn in (yes I know, a very short period of time), I'm starting to pick up new details.
While the high's are still not as pronounced, the bass is significantly more pronounced. I have GoldenEar Triton 2+'s and had to dial the subwoofer gain down to almost nothing. While I like some "pronounced lows"... this is obscene.
I had to turn off the system after only 3 partial tracks. It's not enjoyable. Time to dig around in the couch cushions for some extra change.
Thanks for all the advice folks.
So indeed it is the same board. ICEPower 1200AS2. Comparing pictures, the only REAL difference, is the AC transformer has more "vibration isolation goo" packed between the windings and the core/cage.While the high's are still not as pronounced, the bass is significantly more pronounced.
Strange all should be the same with just a mains trany change, unless some small damage was done to both channels of the Class-D board which limits the HF and gives the impression the bass is up.
By any chance did you listen to one of your other amps while this was getting repaired?
So after trying to listen to the amp last night, and giving up after just three tracks, I took a note from @russ69 and sent the mfgr an e-mail.
They confirmed what I noticed regarding the "goo", and suggested I keep going with the break-in:
So as a follow-up to all this discussion, I'll leave some notes.
1) Need for burn-in of the ICEPower boards = True.
I spent a few more weeks with the newly refab'd unit, and indeed it DID improve. So much so, that I almost hesitated with point #2 below.
2) The incremental difference between an ICEPower based Class-D amp, and a McIntosh MC-312 was much more significant than I expected.
While stewing with the "newly refurbished" amp, trying to break it in... I contacted my local dealer. I requested an A/B between MY ICEPower unit (not one he'd had on his showroom floor) and a MC-312 using the same system.
While doing the demo with a few of my select demo tracks in hand, I immediately could sense an enhanced "decay" in some instruments, and for some reason, even MORE separation ... compared to my amp.
So Fast Forward a few months of waiting in line for my dealer to get a drop shipment from Binghamton... and a couple more months of critical listening... and I do admit... "you do know where that money went".
(could not help the movie quote...)