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  1. T

    Dual 10" vs single 12" subwoofers

    Today I did another subwoofer setup (two SONOR Dracos) and went from an assumption of needing more subs to turning down the gain by 10dB (aka headroom jumped up by 10dB) by moving the mains by 40cm one sub 30cm and another by a meter and optimizing the filters, phase and gains. System tightened...
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    Dual 10" vs single 12" subwoofers

    It really depends on the driver and the cabinet size/amplifier. Multiple subs with the correct setup can really improve integration between mains and subs a lot.
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    The future of hifi in SA; is the industry running on empty or ?

    Retailers will sell at what the market can bear. If retailers are not jumping at capex and forex exposure, they'll take the lower sales and higher margins while cutting their baseline costs locally and look to extract maximum profit from the stock they currently hold or look to bring in with low...
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    Screws for drivers

    Its more durable than a threaded insert. Thread inserts can just be sunk in more quickly.
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    Screws for drivers

    Drill the clearance hole size, tap, super glue, let dry fully (superglue dries in absence of air which happens when the MDF wicks it in) chase with the tap and use a regular cap screw.
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    Kodak inverters? Good or not?

    Speak to the guys at Solar Inverter Warehouse and ask about return rates on their inverters. Voltonics/Axpert are pretty high, GroWatt extremely high and then the Deyes (Sunsynk OEM), Luxpowers, Fronius, Victrons are the noise in the equation. The insurance may on inspection void any claim if a...
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    Air cored inductors

    I can only go on by what the store lady from Wilec told me this morning. Knowing what it's like to wind 2mm onto small bobbins I would kinda guess it's likely mostly primary material for very large transformers.
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    Air cored inductors

    The challenge here will have been short coils of 2.0mm wire. The base wire is typically sold on 40kg spools and occasionally available on 10kg spools which they would buy and hardly make any money other than retaining an offcut of slow moving material.
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    Disney+

    My observations are from kids who have very little screen time and extensive outdoor time after they watch these media, there is a definite impact on their behaviour and I don't think its good for their development to overstimulate them like this for sometimes hours at a time. Same with kids who...
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    Disney+

    Disney's blatant agenda is not even what I'm getting at. I am after flicker, things like mickey-mouse's unnatural rendering of ears not tracking his head motion imprinting that Disney logo into children's' retinas and visual cortexes. The over-stimulation of their dopamine receptors is...
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    Disney+

    Their kids programming is almost like Nickelodeon, one sees whole classes stimming when they come off this "programming". I now only show old fashioned animations for a limited time and in the context of family viewing.
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    Air cored inductors

    I wind inductors from time to time. Is the wire 2mm or 2mm^2? 2mm at 2.2mH is quite an inductor but doable.
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    Autoformers. Please explain and talk slowly.

    You might be best served with a tank circuit or two before the auto former to tame the electrical behaviour (the transformer does its thing with those too) but one still needs the resistor network changed in step to provide the correct transfer function. This is the Achilles heel of old tannoy...
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    The future of hifi in SA; is the industry running on empty or ?

    The way I see it, commercial audio will continue with a reshuffled and consolidated importer/dealer network vying for much smaller pot. Domestic/High End is too small a market now and too much consumer attention has moved to other spheres for specialist audio aficionados to feature in the way...
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    Deformed spider mystery

    Spiders are not just low frequency springs, they have high frequency behaviour and a repaired OE spider might be better sounding than a chinese cloth spider replacement (of which the 600 series will use in any event, but of a carefully selected material property). Perhaps inspect whether the...
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    Solar panel size to charge 50Amp hour battery ?

    I finally took the bait after we had some extended power outages. I am so glad we had a 12Ahr 12V DC backup for the connectivity backup and 2x100Ah LAs on an inverter. Getting the essential circuits taken care of is such a godsent.
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    Solar panel size to charge 50Amp hour battery ?

    Perhaps look at a Lithium battery, then one doesn't have to consider the health of the battery until a much deeper discharge.
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    Solar panel size to charge 50Amp hour battery ?

    One seems to get around 5 sun hours equivalent full power output per day seems to be the rule of thumb and if the setup powers anything critical it's best to err on the side of caution for a cloudy spell. Most of the time the solar output will have the battery floating for 6-7 hrs per day and...
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    Chamfered corners

    In shor,t in the frequency range where rooms have the greatest likelihood of dips and peaks (where modes are few and far between) the resonances set up between the main axes (depth, width and height) dominate and a chamfer doesn't do all that much. If you're chamfering a rectangular room, then...
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    Chamfered corners

    No It just makes it slightly harder to model if the chamfer is significant in size (push the concept to an octagon in plan and you're not far from a rondavel ... which have very troublesome acoustics). Mostly the sparse mode area is dominated by first order axial modes. There are very clever...
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