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Recent content by AmadeusMozart

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    EU backtracks on banning ICE cars by 2035

    I've said it before and I'm saying it again: One is a mug to fall for the EV scam. Poor kids, having a limited lifespan extracting cobol from the soil is one of the issues. Then once an EV has been in accident the battery cannot be trusted and has to be replaced. Often the battery is half the...
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    C: Drive 'full' - Windows 10 - Clone on larger drive?

    Is it a Dell computer? I second using treesize as there was so much space used for crap backups, 6 months after buying the Dell the drive was full. From my notes for Dell fix: - uninstall the Dell Automatic health support software (Support Assist) - use treesize to determine where space has...
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    PFM Special - a simpler and more affordable DIY loudspeaker design

    I like the cloverleaf PCB from soundimports.eu for the crossover PCB. They are located in The Netherlands and shipping costs was very reasonable to New Zealand. https://www.soundimports.eu/en/crossover-components/printed-circuit-boards-pcb/ I do not like using T-nuts: there is a flexible...
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    Highly reviewed gear that was a big let down for you?

    FWIW Many metal / hard surface drivers have horrible breakup above the noticeable audio range. Medical experiments have shown that the untrasonic sound up to approx. 30 ~ 35 kHz still gets registered in brain activity and this is well outside the frequency range that we're able to notice. IMHO...
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    Wanted: natural substitute for aperiodic port foam

    Since you've obviously got a computer I would load up Foobar 2000 and install MathAudio room eq (free too) and use a microphone to measure response curve. You'll quickly see difference between left and right so you'll know if you are in the ballpark. No need for a calibration microphone, you...
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    Wanted: natural substitute for aperiodic port foam

    Air filter foam, the foam needs to be "breathing" and matress foam normally doesn't breath much..... You can get it in different grades (it is normally used for air filtration systems but I am thinking of the foam used for engine intakes, e.g. motor bikes). I rested a Mac Mini on a piece for...
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    Courier despair

    I just hope that the uneven weight distribution more or less automatically ensures the box drops the right way up after being thrown.... Parcels disappearing is nothing new. More than forty years ago anything that had to be shipped over more than 150km had to be done by rail before being loaded...
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    Has anyone on PFM built a uTracer?

    A lot of vintage tube testers are bascially go / no go and are very senstive to mains voltage fluctuation. And what is all the cr@p on the mains from solid state poer supplies and speedcontrollers doing to measurements is anyone's guess. If you want to properly test for matching then you'll...
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    Has anyone on PFM built a uTracer?

    The crucial words in the description are: It uses pulsed and it takes 30 second to measure which is not an issue because it take a minute for heating the filament (or something like that). There are two issues with this: Pulsing means that the plate and screen are not heated up to full...
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    Courier despair

    It starts with the manufacturer. An amplifier should be sturdily build, enough to withstand a drop of at least 50 cm, perferably 75 cm, without damage! Many of the flimsy chasis cannot even withstand a drop of 25 cm without damage. And pack the amplifier upside down with the transformers at...
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    Post-Trump: III (decline, further tantrums, legal proceedings, book deals etc)

    The more you stir around with shit, the worse the stink gets.
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    Harbeth P3ESR vs XD

    MDF from the early days is different from today's MDF due to environmental requirements for glues used being now banned. And likely it was sealed with a clear lacquer. I would not build a boat from particle board - we use particle board as a building material in New Zealand and we call it...
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    Harbeth P3ESR vs XD

    Most modern bass reflex speakers that are veneered are not covered internally with veneer - in other words the MDF is not sealed. I have read that Harbeth is one of the few that uses MDF that is veneered on both sides. When using something like a sealed ProAc Tablette 10 the inside is not...
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    Harbeth P3ESR vs XD

    I've read postings from a number of different users that they prefer the Graham version above the others (inclusive Falcon). Spendor LS3/5 (non A) is another option. Never had the opportunity myself to compare them side by side so take it for what it is. One thing to consider: If you live in a...
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    How to build loudspeaker cabinets - links

    Airplane birch ply does not have voids. Expensive - yes. Just bought some small pieces to make a new baffle for a LS3/5A cabinet from a model maker (toyshop for making model airplanes & model boats) outfit. The alternative is to pick a large sheet and watch where you are cutting, probable...


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