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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85 views

50W Amp for 15W Speaker

I am building a portable speaker and I am looking for a decent amp for my two 15W Phillips speakers. It is tough to find an amp that is efficient and cheap so I was wondering if there is something ...
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1answer
72 views

Replace vintage speaker connection by modern one

So, I have a vintage Pioneer hi-fi installation and I want to use it in a recording studio. It features two passive speakers and one amplifier. My problem is that the speakers need to be connected to ...
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1answer
38 views

Matching speaker specifications with bluetooth audio board specifications

As the title states, I am having trouble interpreting the specifications for a Bluetooth audio board I have to determine what kinds of speakers I need, or if I need an amplifier circuit between my ...
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3answers
83 views

Correctly powering amplifier and speakers

I have a few speakers that I salvaged from broken electronics and I plan on buying an amplifier board to drive the speakers. I'm currently looking at an amplifier such as this one and have sketched a ...
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2answers
43 views

Louder Horn / Circuit / Different Speaker to be louder

The main goal is to make our current speaker louder. The second goal is to use a speaker with a smaller form factor than our current horn that is louder. We are using a 24Vp-p DC circuit (push +12V /...
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1answer
34 views

What Else do I Need to Make a Speaker Work in These Conditions? [closed]

Recently, I was faced with a slight challenge. My computer stopped wanting to power on, and I needed it to work fast. As a computer technician (in-home), I had all of the tools necessary to fix the ...
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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 ...
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3answers
67 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 ...
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0answers
27 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 ...
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1answer
38 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 ...
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1answer
58 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 a ...
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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 ...
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2answers
71 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 ...
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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 ...
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1answer
53 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
34 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 ...
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1answer
45 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 ...
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1answer
58 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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1answer
80 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 ...
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4answers
105 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: \$...
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2answers
835 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 ...
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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 https://www.youtube.com/watch?v=...
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2answers
37 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 ...
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2answers
248 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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1answer
53 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
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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 ...
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4answers
505 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 ...
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2answers
160 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 ...
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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 ...
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1answer
63 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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1answer
45 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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2answers
43 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 ...
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1answer
87 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 ...
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3answers
101 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 ...
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2answers
218 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 ...
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1answer
60 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 ...
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1answer
310 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 ...
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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 network....
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1answer
64 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 ...
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1answer
162 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
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3answers
61 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
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1answer
209 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. ...
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1answer
107 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 ...
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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 ...
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votes
2answers
234 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 ...
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votes
1answer
111 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 ...
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1answer
260 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 ...
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4answers
428 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 ...
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3answers
563 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?
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1answer
120 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 1....