I've started building a kit for a micro-monitor, the microspeaker µ from Quint Audio. It's a very small speaker, barely above 1l of internal volume. Otoh, the crossover is fairly beefy; it's a very inefficient speaker (76db/2.82V, 8R).
The crossover could fit inside the box (barely) but I'd rather move it inside a small stand under the speaker. In either case, it will be really a tight fit.
Is the kind of layout attached ok ? Left side is the woofer section, right side the tweeter. Coils are close but that's hard to avoid.
The crossover could fit inside the box (barely) but I'd rather move it inside a small stand under the speaker. In either case, it will be really a tight fit.
Is the kind of layout attached ok ? Left side is the woofer section, right side the tweeter. Coils are close but that's hard to avoid.
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Is the kind of layout attached ok ?
Can you mount some of the parts on the bottom of the board?
Here are the crossovers. For the tweeters on the left, for the woofers on the right. I will follow jrh0516's suggestion. The part for the woofer will go inside a small stand and the part for the tweeter inside the speaker itself.
Time for the most difficult part now: painting and veneering. I've got walnut burl and Tineo veneers on the way... choices, choices.
Time for the most difficult part now: painting and veneering. I've got walnut burl and Tineo veneers on the way... choices, choices.
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Hey there 00940, looks like a very neat little speaker project, although I wonder if there might be something odd with this sensitivity of 76 dB/2.83V. Depending on the XO filter it may be true or not. Is this woofer filter consisting of 2 inductors, resistor and a capacitor a 3rd order electrical (resistor in series with cap) or a 1st order with an RLC in parallel?
Driver sensitivity in infinite baffle is 86 dB/2.83V/1m, so with a full of a bsc it should not be lower than 80 dB, only if filter was causing it.
Driver sensitivity in infinite baffle is 86 dB/2.83V/1m, so with a full of a bsc it should not be lower than 80 dB, only if filter was causing it.
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Just a side note, does any know what's the typical volume in liter of the xover for a 2way monitor?
That depends pretty much on the monitor. Most are below 0,1l, so absolutely neglectable.
I think I know now what's wrong with it. In the product pdf of micro speaker the impedance graph shows the lowest Z at about 7 ohms and that can only be with an 8 ohm driver, although the data for the driver says it's Peerless SLS 85 S25 CP04-4, which is probably a typo, as it should have been written CP04-08. Then sensitivity and impedance do match up for the 8 ohm unit.
edit: I am not interested in you disclosing the filter parts values, I would not have any use of it. My curiosity is whether a driver being used in this kit is a 4 or an 8 ohm version, which you can check easily. Thank you!
edit: I am not interested in you disclosing the filter parts values, I would not have any use of it. My curiosity is whether a driver being used in this kit is a 4 or an 8 ohm version, which you can check easily. Thank you!
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There's indeed about 1R3 worth of dcr in line with the woofer. It's a sealed GHP design btw (Subwooferabstimmung mit Kondensator und Widerstand).
It's coming along nicely. I've got the feeling that the smaller the speaker, the harder it is to build. There's really no room for tolerance.
It's coming along nicely. I've got the feeling that the smaller the speaker, the harder it is to build. There's really no room for tolerance.
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It's slowly coming together. Veneering is done, the crossover section for the tweeter is installed (inside the main box). I still have to install the crossover section for the wooder (inside the black support) and wire the drivers.
I'll then be able to quickly test everything before gluing the front plates and put some tung oil on the veneer.
I'm really amazed that they suggest to fit everything inside the speaker... that'd be quite a feat.
I'll then be able to quickly test everything before gluing the front plates and put some tung oil on the veneer.
I'm really amazed that they suggest to fit everything inside the speaker... that'd be quite a feat.
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