Miguel pops the lid on his CD transport to tweak the sound скачать в хорошем качестве

Miguel pops the lid on his CD transport to tweak the sound

Today we’re looking at Miguel’s mods to his Cambridge CXC CD transport, but you might find some of these of use with any transport or CD player. Miguel's first Audiophiliac video,    • Meet Miguel, and his German horn speakers,...   Info on the Cambridge CXC CD transport https://www.cambridgeaudio.com/usa/en... Before you poke around inside ANY component UNPLUG IT! And be aware that making changes to a transport or CD player will likely void its warranty! Miguel‘s comments Information/advice is given AS IS - anything you decide to do you do so at your own risk Any mods involving opening your unit will likely void the warranty - do so at your own risk I’m trained as a physicist not an engineer so I might get some things wrong here. Please feel free to educate me General tweaks/mods applicable to all players External (won’t void warranty) Solid base placement, isolation feet; weight on top of unit Line filters (generally useful for digital); ferrite chokes on power cord Internal (will void warranty) Dampening material (eg Dynamat) Tightening screws (do not overtighten) (somewhat player specific) Improve power delivery and/or filtering with appropriate caps to DC power lines or similar (very player specific) The Cambridge CXC CD transport Positives: Linear power supply with overbuilt 40VA toroidal transformer Servo board (“S3 Servo”) and CD mechanism same as top of the line units Rectification/filtering/regulation done on S3 Servo board directly and carefully designed Digital output board well designed and outputs a clean, sharp SPDIF signal (seen on a 100MHz digital scope) Supports CD text - kind of cute, but since display is hard to read, sort of a moot point Negatives: Display is small and dim, useless from a few feet away Remote is huge but only a small portion controls the CXC and there’s no track # direct access Box is metal but very light and “rattly” The mods: External mods (will not void warranty) Isolation feet - unit is unbalanced (transformer is heavy) so careful placement of 3 feet could help Weight up the unit - eg a heavy book Line conditioning - give it a try Internal mods (will void warranty) Display brightness - maximize by turning the pot. Improves a bit but it is still hard to read Dampening using Dynamat: Dynamat adds both resonance & microphonics reduction as well as weight Care must be taken on the layout of the Dynamat on the top cover Digital cable separation from control cables S3 Servo power: pull directly from transformer; use thicker wire (20awg instead of 24awg); add ferrite choke Tighten all screws - do not overtighten Extra weight on top of the unit - eg heavy doorstop works great Would I consider a clock replacement? Probably not. Jitter only matters in as much as the DAC sees it and can handle it. There are many intermediate components that add jitter (power supply noise combined with transition slopes, other noise picked up along the circuit/cables, clock recovery noise at DAC, etc). The jitter added by these other components can be in the order of nanoseconds, so replacing a picosecond phase noise clock with a femto second one at the S3 Servo point seems hard to justify. Happy to be proven wrong here. Digital interconnects: Tested: Audioquest Cinnamon (RCA/RCA, 3ft, copper/silver) Blue Jeans Cable (RCA/RCA, 3ft, copper/silver) Blue Jeans Cable (RCA/BNC, 3ft, copper) AQ has a rise time of 12.6ns, both BJC have risetimes of 8ns (properly terminated measurements on a 100MHz scope) AQ sounds to me a little more etchy, prefer the sound of either BJC which is a tad more relaxed Interestingly, service manuals with full details can be found online for many of the Cambridge CD players, which share many of the same components and design with this player. #audiophile #Audiotweaks