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Large “audiophile” axial capacitors: Some of these are sold as “low inductance” or even “non - inductive”, but be not fooled. Apart from ye ole polystyrene caps, all film caps have schoopered (metal - sprayed) end contacts, shorting out all windings. Thei r inductance is dictated only by size. Some figures: a standard 0.2” pitch MKT: 5nH. A 1.5”x0.6” round axial cap: 20nH. Just putting one of these in an output filter increases conducted emissions by a minimum of 12dB compared to a humble MKT. If you see a large axially mounted cap in the output filter: groan in despair.
Until now, the lowest-priced floorstanding speaker in our list of Recommended Reference Components was the KEF R500 ($2599.98 USD/pair), reviewed in August 2012, and added to the list the following month.Hans Wetzel’s review of the KEF Q750 loudspeaker ($1499.98/pair), published in February 2018 on SoundStage! Access, changes that. In his review, Hans wrote of the Q750: “It’s one of the most neutral transducers I’ve ever heard, and for the money offers staggeringly transparent sound”...
I still can not find the explanation of why bypassing the tweeter capacitor I experienced the improvement. The same with the Würth 150 kHz ferrite with the woofer cables (I have an hypothesis). But I can not deny the great improvement.
I'm sure Danny Richie could easily improve the crossover and sell it. Or like my cheap tweaks.
There is a well known reason for this. We use by-pass caps in several applications for the same reason. And yes the improvement can be fairly significant if done right.
Schematic is similar to this one used in well known Vladimir Shushurin’s Lamm-1 amplifier.
Here's the full text from the above amazon review (now deleted)
By NotaSecondTime....I'm an engineer who has been experimenting in high-end audio/video since the dawn of home theater. This speaker is one significant breakthrough I've been waiting for, but IM discriminating HO, only sounds really good with the following $8 modification.After a week of break-in, i made an inexpensive but audibly significant internal upgrade to the JBL LSR305 monitors.For those who are electronically inclined, the mod replaces the two amplifier output ferrite o-rings with four of [Gino 10 Pcs Movable 7mm Inner Diameter Black Ferrite Core Ring Cable Clip UF70B] available from Amazon. So for two speakers a total of 8 new ferrite clamps is required. Cost $8 and will void your $119 investment (actually its uneconomical to send back the entire speaker for warranty service, I'd isolate & send just the amplifier module or the speaker driver)...The modded speaker sounds considerably more refined & coherent as if cut from the same cloth. Also less distortion. Imagine seven channels for $960, or eleven bi-amped speakers for $1320. Add a powerful subwoofer and you're good-to-go...
I too have this DAC and have been very pleased with its performance. But at the same time, also has been susceptible to noise/hiss, which was remedied with ferrite cores on the cables.
Forever Changes failed to achieve commercial success when it was first released in 1967, but it has since become recognized as one of the finest albums to come out of the Summer of Love era, ranking 40th on Rolling Stone magazine's 2003 list of The 500 Greatest Albums of All Time,[2] being inducted into the Grammy Hall of Fame in 2008 as well as being added to the National Recording Registry in 2012...
AudioID : 2Format : AC-3Format/Info : Audio Coding 3Codec ID : A_AC3Duration : 42 min 40 sBit rate mode : ConstantBit rate : 384 kb/sChannel(s) : 6 channelsChannel positions : Front: L C R, Side: L R, LFESampling rate : 48.0 kHzFrame rate : 31.250 FPS (1536 SPF)Bit depth : 16 bitsCompression mode : LossyStream size : 117 MiB (17%)Service kind : Complete MainDefault : YesForced : No
