A speaker is a device which converts an electrical audio signal into a corresponding sound. Questions about fixing speakers will be closed as off-topic.

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2answers
45 views

What colours correspond to what in Earphones?

I have repaired earphones a lot of times before. I was very confident that I can do it with any earphone. My friend happen to give me one to repair, Its from a company called KDM. The problem is the ...
3
votes
3answers
55 views

Speaker out (from laptop) to Mic in (Mobile phones)

My aim is to connect Mobile phone's Mic to Laptop headset out for injecting audio into mobile phone calls. So that Mobile phone calls should get answered automatically and system should play the ...
0
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0answers
24 views

Proper Capacitor for 555 Circuit with Simple NPN Amplifier

As I understand it, in the classic 555 with a speaker circuit, the capacitor that is in series with the speaker is there to prevent DC from flowing through the speaker: And this capacitor, C1, is ...
0
votes
1answer
33 views

Portable 12V power supply with UK AC output

I'm new to this community and starting with EE. I am trying to create a portable set of speakers using some old speakers with UK Plug. Speakers Rating: 230V 50Hz 0.3A My current understanding from ...
0
votes
1answer
56 views

Why prevent high frequency input into the loud speaker using a low pass filter?

As much information as possible about this figure would be helpful From what my professor said, "Q2 oscillates when we connect a Loud Speaker, this might generate high frequency signals, so we use ...
12
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5answers
4k views

Why are DC signals bad for loud speakers?

I googled and found out through some forum that: DC has a constant amplitude which overheats and destroys the voice coil of the speaker. Could someone clarify if this answer is complete and ...
0
votes
2answers
54 views

Increasing resistance on speakers

My amplifier is rated at 8ohms for my surround sound but my speakers are 6 ohms. The owners manual says that if the speaker resistance is too low the power protector will blow and that is exactly what ...
0
votes
1answer
67 views

What resisters for inverting op-amp should I use?

I am not an electrical engineer by any means so go easy on me here. I am simply experimenting with a speaker amplifier. My situation: I have a Clarion xc1410 4-channel amplifier with a 10k input ...
0
votes
1answer
38 views

Can I connect an amplifier to a Crystal Radio?

I am wanting to create a crystal radio that connects to my amplifier (It is for a guitar and has 3.5mm and 1/4" jacks). The diagram is as shown: Would this be possible and work? If not, please ...
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1answer
33 views

Spliced audio auxilliary cable

I spliced a wire with a headphone jack attached, the rubber cable runs two separate wires together (like speaker wire.) In one there is one coated copper wire and one uncoated copper wire. In the ...
0
votes
1answer
44 views

Which method of controlling speaker volume consumes more power? [closed]

2 speakers are playing at same volume from computer. One speaker volume is controlled by software but knob turned to maximum. Another speaker has volume knob set at 75%. Both are playing at same ...
-1
votes
1answer
52 views

What kind of speaker can be used with an LM386?

I am trying to use an LM386 to drive some speakers. I have both a 4Ω 4W speaker and 8Ω 1.5W speaker. Would I have to build a different circuit for each of these and would the LM386 be able to drive ...
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0answers
27 views

Does anyone have spice model parameters for 0.5W 32ohm or similar speakers?

I know that Re = Measured Voice Coil Resistance Le = Measured Voice Coil Inductance Fs = Resonant Frequency are the main parameters to make a reliable speaker model for .ac . So for a generic ...
-1
votes
1answer
72 views

How to properly connect an old record player output (spade connector, possibly amplified) to an RCA tape deck with built in amplifier? [closed]

I have an old magnavox record console which for some reason the speakers don't seem to get very loud. Tracing the components, I think I can bypass those built in speakers completely and have the ...
1
vote
4answers
92 views

Measure AC power consumed by a loudspeaker

I'm interested in measuring the efficiency of a loudspeaker. I have tools to measure the SPL in dB. However, the electrical efficiency has me a little puzzled. The speaker has a voltage applied: ...
8
votes
2answers
814 views

Parallel speakers sound bad, but serials are fine

I have made a simple speaker circuit. It sounds (at least to me) surprisingly good (though an audiophile would probably scream out loud and run away). I have currently run across a problem. To ...
-2
votes
1answer
45 views

How do plasma arc speakers work? Also, Bass? [closed]

Please see the following videos for examples of what I am asking about : https://www.youtube.com/watch?v=NeIAkKmUfn4 https://www.youtube.com/watch?v=rasp88nbsRw ...
1
vote
2answers
36 views

Chaining output of amplifier (to speaker) to another amplifier

I purchased this holiday card sound recording module: Link. It's hooked up to a 0.5W 8Ohm speaker, and the IC is shielded from the outside world, so I really only have access to the outputs to ...
4
votes
2answers
207 views

Driving a speaker directly through an audio DAC?

I have a project where I'll need to generate some sound waves. In case it matters, the microcontroller I'll be using is an STM32L476RG which have an internal DAC. The question I have is related with ...
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votes
1answer
52 views

if I link four bass speakers PDA 1650 does the ohms change [closed]

I've got a hpa 3100l amplifier which I want to bridge which is 3400 watts in 8 ohms can I link 4 PD 1650 8 ohm speakers to them without causing damage does the speaker ohms change
-2
votes
1answer
83 views

Audio op am for low noise high volume

I am trying to make a high quality circuit to take mp3 (stereo) signal and drive a 4 ohm speaker. I have been using the LM368 as in the picture below and this has ok quality when the volume is low but ...
3
votes
4answers
493 views

LED's flash with music

I am wanting to put have a few LED's flash with the intensity of my music. I don't need a color organ, but just want the LED's to flash in sync with the music. I am amplifying the signal with a LM368 ...
0
votes
2answers
155 views

How loud is a 0.25W speaker supposed to be?

I know this is a very broad question; I just want to know what I should be expecting from it. At the moment it's hooked up to an LM386-N3 op-amp outputting a 5V single rail square wave and it is ...
0
votes
1answer
40 views

single oscillator driving multiple speakers

This is an odd request for a circuit. I want to drive multiple speakers mono not differential from the same microcontroller. I want to just drive a tone through 8 8-ohm speakers so I thought I could ...
0
votes
1answer
62 views

how to sync leds with the beat?

how do i make led strip flash with the beat (subwoofer) without risking burning them out and im using a car amplifier that kicks out 1250w peak for the subwoofer i tried using a multimeter i got ...
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votes
1answer
43 views

What is a safe voltage for ultrasonic frequencies being fed to a regular speaker?

In a circuit I am designing there will be high frequency noise output into a speaker at -60 to -80 dBV. It's just that I opted to use a simple 2nd order LC filter (47 uH, 470nF) for delta-sigma ...
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vote
2answers
39 views

Multi channel variable speaker design problem

As part of my my consideration of possible solutions to my multi channel variable speaker number problem arising from my attempts to restore radio functionality to an old hotel intercom system (see ...
0
votes
1answer
83 views

Amplifier impedance matching with constant voltage speaker systems

I understand that in order not to potentially overload an amplifier one should connect a speaker with an impedance no less than that specified, and I have just recently come to understand that for ...
3
votes
3answers
94 views

connect 2 speakers to act as a telephone

I've got this very faint memory from my childhood that my dad connected 2 pieces of old, 5 cm diameter speakers to each other with a 10 meter wire. And without any other equipment, it would transmit ...
0
votes
2answers
193 views

Trying to remove distortion of speakers seems impossible

I'm working in a project with the goal of make a portable bluetooth speakers without distortion. When I try to turn up the volume, the speakers start to make a distorsion, like when rhe radio can't ...
0
votes
1answer
59 views

Easiest way to generate 25V speaker signal

I have a fire alarm that accepts a 25v line level speaker input at 4w, what is going to be the easiest way to play arbitrary signals over it i.e. from a 3.5mm jack, an amplifier and a transformer? are ...
2
votes
1answer
278 views

How can I hook up a simple MOSFET to amplify the PWM signal from Arduino?

I have an 8-ohm 1/2 Watt speaker I'd like to hook up to the Arduino. I'm currently hooking up the gate of a FQP30N06L MOSFET to the PWM output of the Arduino. I've tied the drain to Vcc (5V) and the ...
1
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1answer
43 views

Cancel resonation impedance of a speaker

In a speaker there is a resonace impedance. Now I am trying to cancel this out in order to create a flat impedance graph for all frequencies. I know this can be done by using a parralel zodel ...
0
votes
1answer
63 views

Output to Speakers or headphones?

I am going to be wiring up a custom circuit. Audio is output from two LR audio cables. I am going to wire them up to two mini speakers, one for each LR cord. But how do I add in a part to detect if ...
2
votes
1answer
147 views

Combining speaker outputs to one secondary amplifier

I have a tricky question, I hope you are able to help. I have had a search through this site and others and found part solutions to my questions. The issue: I have a Denon 5.1 av receiver and have ...
2
votes
3answers
60 views

Momentary in-line volume control

I'm a volunteer firefighter. We have two kinds of radio traffic. Tones and voice. Tones trigger our pagers, but are also audible when listening to the radio. The trouble is that the tones are much ...
0
votes
1answer
195 views

Sound generating with an AVR

I'm just wondering how can I drive a speaker with an AVR chip, like Atmega16? I have a source code for it and I have ran it in Proteus and it worked but I don't know how can I connect it practically. ...
1
vote
1answer
101 views

How do I set up speakers in series and/or parallel for a minimum 4 ohm load on the amplifier?

I need to connect 4 speakers to 1 output of a power amplifier. All speakers are identical (100 watts @ 8ohms) and the minimum load permissible on the amp is 4 ohms. They can be connected in series ...
0
votes
1answer
44 views

Maximize power to RL with LM741 output

I have to design a circuit that maximizes power to RL which is a resistance representing a speaker attached to the end of a LM741 op-amp. This is a non-inverting op amp in the circuit, and I just need ...
3
votes
2answers
232 views

Repercussions of choosing a poor audio amplifier

I have a customer who had an audio system setup in his business a couple months ago, and he's had some issues with it. The relevant bits are that one of the original amplifiers blew upon initial ...
2
votes
1answer
103 views

NE555 speaker voltage spikes

I made a NE555 circuit with speaker. It works fine, but when I connect its output to the oscilloscope, I get this view: How could I reduce these voltage spikes? How can I get nice square waves? Or ...
4
votes
1answer
258 views

Before I build: will this circuit work, or have I overlooked something?

I'm an engineering student (ChemE), just starting to get in to electronics and electrical engineering. Next semester I'm planning on adding an electrical engineering minor, but I wanted to get some ...
1
vote
4answers
375 views

Tape recorder head has only 2 pins, which one is for grounding?

I am trying to make my own cassette adapter that will help me play my music on my iPod through my car stereo system that supports only cassettes. For that I've bought a 3.5mm earphone jack and a ...
1
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3answers
486 views

Speaker Frequency Range and Frequency Response

What is the difference between frequency response and frequency range of a speaker? How do we measure frequency range and frequency response?
1
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1answer
112 views

Why are load resistor values in common-emitter amplifiers so large?

So I have seen a few circuits for common-emitter amplifiers, like this one here. I get the function of most of the components and thir placements, but my question is, why is the load resistor at ...
3
votes
2answers
159 views

What does a LC circuit in parallel to a speaker do?

I'm designing crossovers for my rear channels; a 2500 Hz 3rd order butterworth between an 8 ohm ribbon tweeter and two 4 ohm woofers in series (8 ohm load). While my original plan was to use two DPDT ...
2
votes
3answers
156 views

How do I check polarity on loudspeaker?

How do I check the polarity on a loudspeaker? I have an 8 ohm 2 inch speaker with no wires soldered into it and the terminals have no markings. How do I know which of the two terminals is positive ...
5
votes
6answers
695 views

High impedance loudspeakers

Available speakers all seem to be low impedance like 4 or 8 ohms etc. Philips used to make speakers of 800 ohms for their SRPP valve stereo amplifiers. The speakers weren't that great even in 1958. ...
1
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0answers
59 views

Speaker designed for ultrasound operation

I've created a transmission protocol in order to transmit information bits between a PC speaker and a smartphone, or between 2 smartphones using ultrasounds. I've implemented a QFSK system which uses ...
0
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1answer
221 views

Replacing a 8 ohm Speaker with a Piezo. Will it work?

Like Replacing a piezoelectric speaker with an electromagnetic one, but the other way round. simulate this circuit – Schematic created using CircuitLab A DC squarewave will turn on and ...