New answers tagged

1

I assume you have speaker elements (no cabinets) which are intended to be used without cross-over filters, they are not bass nor treble elements. If we assume the 5W and 10W ratings are valid with the same signal content you can connect the 4 Ohm speakers in series and insert the 8 Ohm speaker in parallel with the series circuit. Then you have 4 Ohm load ...


2

The centre core of a shielded cable will be lightweight and higher resistance. Unshielded would be better and shielding isn't required wen feeding a low impedance loudspeaker with a relatively high powered signal.


7

You also have to deal with how much of the sound comes from the speaker's enclosure. Unless you're sawing up and recycling the relevant parts of the macbook case (or re-using the entire case as the enclosure) you're left with a huge problem determining what aspects of the case design really matter and replicating them, or tuning the frequency response of the ...


4

Extracting the audio amp part of a motherboard, let alone a laptop motherboard, is unlikely to work well. SMD circuits, multiple pcb layers and routing. Cutting it out would be like shattering a piece of glass and trying to piece together a small section again. There are multiple schematics online for building your own amplifier circuit. Or even typical ...


-4

For years I struggled with sound that was too bright. I have a medium quality tube amplifier and horn speakers. Accidentally I discovered that nicely separating interlinks from current cables and lifting my mainsblock and cables from the floor on small wooden stands made the sound smoother. Isolating the plugs of interlinks and speaker cable with a bit of ...


1

Given the low cost of these products, they use the cheapest parts that fit and those are hard to find. The wiper is unlikely to be gold plated so oxidation can occur then gets cleaned by friction. Excess friction removes the metalized layer on the plastic film, assuming most likely cheap, metal film pots. They suffer from frequent use , dust and corrosion. ...


0

Measure the resistance Turn the potentiometer all the way to one side and measure the resistance two times. The first time measure between the middle and one pin and the second time measure between the middle pin and a different pin. One of the values should be close to 0, and the other should be nearly the resistance of the pot (So 10k for a 10k resistor). ...


1

It's a cheap crossover. You're right about the corner frequency, even if the speaker's impedance is not resistive, but not about the role of the tweeter: it's meant to play only the high frequencies, and nobody says they have to stop at 20 kHz. But the amplifier, in general, limits the total bandwidth. As for the power, the "cross-over" leaves the ...


10

Beware the "audiophile" hi-fi market, there is a lot of very dubious product sold, often at crazy prices, to exploit and generally befuddle the innocent. In this category, we might include items such as: speaker cables that claim to have almost magical properties, including but not limited to, directionality. The function of a speaker cable is to ...


0

I think you are going about this the wrong way. It's not clear whether or not you have control of the signal source. The approach might be different for a fixed CD player and quite different if the users can use their phones, for example. My approach would be to choose a piece of music with a reasonable volume level, set the output on the device to max and ...


3

This will work off of a 9V battery. Probably would be nice to add another pot for the VBE-multiplier. But it isn't in the spec, so I left it out: simulate this circuit – Schematic created using CircuitLab The above will accept an input that almost meets your specifications. It was designed to actually meet them, but given resistor tolerances and ...


1

You’ll struggle to get much output power from a 741 - it’s not designed to drive the output current needed for an 8 or 16-ohm load, which could peak at 500mA depending on how it’s driven. An LM741 will provide 25mA at short circuit, so perhaps 10-15mA into a moderate load, and probably with significant distortion (although if you’re using a buzzer as an ...


0

That is the transformer of the power supply. Sometimes these vibrate mechanically at the operating frequency, which emits a typical coil whine. The sound may also come from other parts It depends how you intend to fix it. That is most likely a custom part so you can't simply buy a new replacement transformer. You could find a identical device that has a ...


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