Questions about fixing speakers will be closed as off-topic.

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1
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2answers
67 views

Which capacitor for DC blocking in audio applications?

Which capacitor (electrolytic, film, ceramic) do you use for DC blocking in audio applications? From what I have seen most people use electrolytic capacitors. But, also from power decoupling theory ...
-1
votes
1answer
70 views

Can I connect multiple speaker boxes to a single amplifier output? [closed]

I've seen arrays of passive speaker boxes (high output passive professional PA speakers) that were connected to each other and only the last (or first) one was connected to the power amplifier (a very ...
-1
votes
1answer
34 views

2x50w stereo vs 100w mono amplifier efficiency

Which is better for efficiency. mono 100w amplifier or stereo 2x50w It is important because I'am building a portable speaker and it is really important for me to use little power. Also which ...
0
votes
2answers
53 views

Driving a loudspeaker

I've been thinking about this on and off for a while and I thought I would ask the experts. The cone and coil of a loudspeaker have mass, so it takes time and energy to move the cone to another ...
0
votes
2answers
66 views

Ceiling speaker has 3 wires

I recently bought this ceiling speaker (http://www.3acctv.com/upload/uploads/Specification/T-103C.pdf), as shown in the PDF it has 3 wires attached to it. I am no expert in this, so I was wondering if ...
0
votes
4answers
48 views

How could I read a digital input (an open/closed switch) from a smartphone without a digitizing board?

I have to read a single digital input signal (a trivial open/closed-circuit push button) and use this signal in an Android application on a smartphone. Of course, I could connect a tiny Arduino-like ...
1
vote
1answer
61 views

Is there any such thing as “breaking in” new speakers? [closed]

Do speakers have to be "broken in" to get the most out of the sound at all? Can they be damaged if you don't do this correctly? I got a new pair of Polk Hampden speakers yesterday, and after listening ...
-3
votes
1answer
49 views

Desk Speakers DIY [closed]

Although I don't have much experience in building this kind of stuff, I would like to try to build my own desk speakers! I wanted to know if it's better to have active or passive ones, and if you ...
0
votes
1answer
35 views

Problem with the grounding of the speaker and adapter [closed]

I have a problem with my speaker, Altec Lansing iM7, whatever device(iPhone, iPod, android phone) I plug into the ports of the speaker I get a electrical shock :/ I don't know what the problem could ...
2
votes
3answers
76 views

Are ten 2W speakers as loud as two 10W speakers?

If all things are the same (e.g. total magnet weight, manufacturer, cone material) and I have two 10W speakers as compared to ten 2W speakers would the decibel level be the same?
0
votes
0answers
36 views

Standalone Ultrasonic speaker with preprogrammed frequency

I've been toying around with some Piezo speakers for my Arduino. Now I've been wondering if there is a way to remove the Arduino from the equation. It only serves as a power supply for the speaker. ...
0
votes
1answer
61 views

Reverse audio jack for front and back speakers

My problem is a strange one. I have a computer connected to front and back speakers via 3.5mm audio jacks. Sometimes I use the computer with the monitor at my desk. Other times I'm using it to watch ...
-1
votes
1answer
36 views

Materials for a speaker [closed]

if I have a flat, copper sheet and a magnet, Can I make a speaker? Or do I need magnet wire coiled up?
0
votes
0answers
26 views

Piezo and speaker

I have a question. I have not tested this circuit yet, but I am sure it works, my friend did. He used a 8ohm speaker as it is shown in circuit diagram. I want to make it a bit compact so I want to ...
-1
votes
1answer
58 views

How to connect speaker cables via S-Video plug [closed]

I would like to buy a speaker system consisting of an active subwoofer and two satellites. From the photos I can see, that the satellites are connected to the central sub using supplied cables with ...
0
votes
3answers
77 views

Increasing Frequency of a Signal

I was wondering if it would be possible to increase the frequency of a signal by a fixed amount. Basically, I have a negative wire soldered to a speaker and a positive wire that very quickly ...
0
votes
2answers
81 views

Can a malfunctioning relay in an amp cause or allow a speaker to crackle when turning the vol potentiometer? [closed]

Ok, so this question has several layers, I admit it. I recently acquired a Lepai 2020A+ amp. It is, I believe, the latest version PCB because it has the two relays for speaker protection instead of ...
1
vote
2answers
118 views

Audio Jack Sound Signal?

I was experimenting with my laptop's audio jack port (the headphones one) and something that blew my mind happened. I took an AUX to AUX cable and connected it my laptop (so I could easily have access ...
0
votes
0answers
24 views

speaker diaphragm damage from HF harmonics (pops/crackles)?

I have a speaker that began exhibiting a buzz with certain frequencies in correlation with installation of a poorly assembled ground-loop-filter. Volume in car was pretty high. I knew the HFH's could ...
0
votes
1answer
39 views

Replacing speakers' transformer [duplicate]

I have recently purchases new speakers and I have noticed a slight hum coming from the transformer, therefore I am considering replacing it. The transformer, used to power an internal amplifier, ...
0
votes
1answer
96 views

Why are speakers found to be 8 ohm and 12 ohm, where do these standard values come from

I can see that there are speakers of various sizes with various power ratings. However, they usually seem to be 8 ohm or 12 ohm. What does this refer to? And why are they created to be this way? I ...
0
votes
1answer
44 views

VS1053 with SMD speaker, amplifier necessary?

I am working on device that looks a bit like a tablet. It consists of a display and a software controlled by touch on it. It uses the SAMA5D3 MCU from Atmel running linux. I decided to implement ...
0
votes
1answer
89 views

Sending power to passive subwoofer via RCA connections

I have a home theater receiver with a powered subwoofer output and a matching passive subwoofer. I've always connected these two items using speaker wire. Recently I moved into a place that has ...
-2
votes
2answers
64 views

Suggestions for a simple microcontroller [closed]

Please suggest a simple digital solution for an equalizer implementation. I am not looking for any feature heavy DSP based IC, since my application only requires some minor adjustments on the bass and ...
1
vote
1answer
118 views

What is the best way to play music through speakers

I have these speakers I recovered from an old iPod dock. I want to hook these up to a big remote control truck I have but I have never worked with playing music. What is the easiest way to get ...
1
vote
1answer
32 views

ASP solution for sound enhancement [closed]

I built a stereo speaker and to an extent it sounds good. But I noticed, by changing the EQ to "Rock" genre in my MP3 player, the instrument clarity became more clear and vocals were more fuller, ...
-2
votes
1answer
57 views

What could cause sound system to occasionally become weak and mono until clicking 'Test' in Windows? [closed]

edit I am not looking for a repair, I am trying to learn about what could cause the strange behavior simply for the sake of science. Ok so I have an old Yamaha sound system that is mostly broken ...
0
votes
1answer
133 views

Blocking capacitor? Driving 8 ohm .5 watt speaker with microcontroller

I'm reading Make: AVR Programming. The next project wants me to try to drive an 8 ohm speaker with a pin from the microcontroller. I'm no EE, but I do know that 8 ohms is not a lot of resistance, and ...
2
votes
1answer
43 views

Which speaker is better for an application based on it's datasheet

Given two speakers and their datasheets what should I be looking at to determine if one is better for me than the other? I realize this could be a broad question, but I'll frame it in my context. ...
1
vote
1answer
59 views

What connector is appropriate for a 500V electrostatic speaker?

A research group just bought an electrostatic speaker that came with a long cable that is meant to be soldered to the speaker wires. However it would be more convenient to have a connector(s) there. ...
6
votes
5answers
3k views

Can computer speakers emit ultrasound?

Can computer speakers emit ultrasound? What is the maximum frequency that computer speakers can produce?
0
votes
0answers
59 views

using a sycnrhonous motor to drive the voice cone in a speaker

It is possible to consider any arbitrary signal as a continuous function of phase and amplitude. In particular, a digitized audio recording (assuming Nyquist was satisfied) can be transformed into a ...
1
vote
1answer
243 views

home audio: How much current flows through my speaker amplifier's output?

In a recent project I used relays to electronically control a multi-room speaker selector. I wired these relays in parallel with the physical switches in the box. When I was designing it, I wasn't ...
0
votes
1answer
96 views

Matching an amplifier to speakers and subwoofer [closed]

I've got a couple of old Bose speakers and bass and I'm looking to wire them with an amplifier so I can use them with a computers sound card. The speakers' manual can be found here. For the speakers: ...
1
vote
2answers
226 views

Amplify speaker with 9v battery and one transistor

I started electronics recently and I'm trying to make the most basic mp3 amplifier. I try to amplify the music from my phone to the speaker. My phone already amplifies the sound when I connect it ...
1
vote
2answers
104 views

Is it possible to figure out the specifications of an electronics piece without datasheet?

I'm brand new on the "electrical engineering" scene with my Arduino and I have a question about random electronics. I've been taking apart some old phones, salvaging LEDs, motors and speakers, mostly ...
1
vote
2answers
54 views

Voltage of a sine wave given max wattage rating

I would like to test a speaker by giving a sine wave of 200 Hz. On the technical datasheet following are mentioned Sine Wave : 30W Maximum music load : 60 W Frequency Range : 40 to 2000 Hz ...
1
vote
2answers
87 views

I have a .75 Watt/8 ohm speaker. Do I need to use an amplifier, what specs should I look for?

I salvaged a pair of speaker drivers from USB-powered computer speakers that is .75 Watts/8 ohm per channel (2 channels total, L/R). I want to be able to drive audio through it and have volume ...
7
votes
2answers
916 views

Use of 100K ohm resistor along with 0.1uF capacitor?

In the circuit diagram below, why is there a 100KΩ resistor (NOT R2) connected to the capacitor? To my understanding the capacitor-resistor act as a high pass filter to block the DC offset of ...
0
votes
1answer
129 views

MP3 Player: Disconnect 3-watt speaker from amplifier when headphones are plugged in using MOSFETS and the isolated switch on an SMD 3.5mm stereo jack

Can I use Mosfets to disconnect a 3-Watt speaker from an amplifier circuit without any loss of sound quality? I'm using a microcontroller controlled MP3 player called a Flyron FN-M16P, which features ...
-1
votes
1answer
70 views

Is This Black Foil in Front of the Membrane Part of the Speaker?

I bought mini speakers from Kepo (KP3246SP1), they have some kind of black foil in front of the speaker membrane. See the picture below: Is this black foil part of the speaker, or is it packaging ...
0
votes
1answer
129 views

What frequency range is acceptable for a speaker in an audio amplifier

I am building an audio amplifier using a lm386 amplifier with a 12 volt supply driven from a headphone jack. I am looking for a speaker that will work well in this setup. Currently I am using a ...
1
vote
2answers
51 views

Controlling speaker that has 4 interconnected pins

I am fairly new to and interested in electronic engineering. I want to control a speaker I found in an Xbox 360 headset with my Arduino, but I dont know how. Other small speakers I own all have 2 ...
0
votes
1answer
65 views

Displays, camera, speakers, microphones: why after more than 50 years of development do they still need calibration? [closed]

An old question running through my mind: Displays, camera, speakers, microphones: why after more than 50 years of development do they still need calibration? Whatever cheap or high-end material I ...
0
votes
1answer
34 views

Connecting a surround system without jacks [closed]

I have recently bought a house which has already the sound cables passing through the walls. These are raw cables without any jack connectors. My question is, when you go to buy a 5.1 surround ...
1
vote
1answer
91 views

Why does this circuit oscillate and produce sound?

I've connected an 8-ohm speaker in series with coil. When I apply 5 volts / 500 mA to the combination (coil and speaker), I heard a very high frequency sound (something like whistling). The coil is ...
2
votes
1answer
208 views

DIY wifi radio radio NOISE!

I am building a mono, internet enabled, WiFi radio and I have a problem. I am running into what I believe may be a grounding issue. When I turn the system on, I hear all kinds of noise coming from ...
0
votes
1answer
119 views

Replace potentiometer with digital version (Speakers)

I am trying to get my PC speakers to be controlled by my arduino. I've taken apart the control and it seems very straight forward, just need a few questions about subbing the manual pots for digital ...
0
votes
1answer
100 views

Help me hack this other speaker: Where would I introduce two different DC voltages?

I already asked a question about a similar speaker. I am also trying to convert a larger speaker in the same fashion. I open the speaker, and can identify the power supply and rectifier (I believe) ...
0
votes
1answer
220 views

Help me hack this speaker, where would I introduce DC voltage

I have a speaker that runs off of AC (there is a switching converter within the speaker) I'm attempting to convert it to battery power, From my understanding the speaker runs off of 5V (someone else ...