All Questions
196
questions
0
votes
0
answers
50
views
How do you diagnose a fault with a tweeter?
I have a Pioneer XPRS 10 at work that isn't producing any high frequencies; the 10" woofer working fine, but the 1.75" tweeter is not producing any sound at all. It's a 50W, 8 ohm tweeter. I ...
- 101
18
votes
2
answers
4k
views
What is the purpose of these fat copper coils wrapped around … something?
Dissecting 20-year-old outdoor speakers (SpeakerCraft OE8 One), found this electronics board inside. I recognize the capacitors, but what are the big custom coils of copper wire, and what is their ...
- 293
0
votes
2
answers
99
views
Driving speaker with differential driver
I am designing an battery powered device (3.6-4.1 V regulated down to 3 V) which plays audio recordings through a speaker (8 Ω, 0.3 W). I want to drive the speaker by applying two differential inputs, ...
- 135
1
vote
2
answers
69
views
7 contacts 3.5mm jack socket: automatic speaker headphones switchover
Edit:
The output is mono on both headphones and internal speaker, despite the new connector being stereo.
Original:
I only have a mono audio source, and the new socket has dedicated pins for the L/R ...
- 13
0
votes
3
answers
247
views
DIY guitar amp cabinet selector switch
Problem statement:
I have 2 guitar amplifiers and I have 2 speaker cabinets that normally connect via speaker cables (1/4" connectors). I would like to create a passive device that lets me ...
- 103
-1
votes
2
answers
131
views
Why is the output voltage across the load dropping a lot in this audio amplifier circuit?
I am making an audio amplifier circuit in LTspice. This is the circuit that I've made:
Notice that the input is 20 mV. The output plot is as follows:
That is around the gain I want to obtain. The ...
- 15
1
vote
1
answer
108
views
Balance Mic and Speaker for Camera Input with Ground Loop Isolation
Novice looking for some help.
I use a Cardo Bluetooth headset to communicate with friends and record the audio onto an action camera while out riding motorcycles. By trial and error I was able to come ...
- 13
0
votes
2
answers
136
views
Can I Use a MOSFET In Series With My Speaker?
I'm normally a software guy, so please bear with me :-)
I have a TDA2030A amplifier board like this one that I'm using to play audio through a small speaker. I have a microcontroller which I want to ...
- 13
0
votes
2
answers
169
views
Can we place capacitors parallel to the speaker (30 ohm headphone) and aux jack?
I am working on an audio amplifier PCB circuit, where I have used LM386 as an amplifier, an aux jack for audio output, and a small speaker of headphones (30 ohm).
I have two 220 uF molded and one 470 ...
0
votes
2
answers
67
views
What's the relationship among speaker amp IC's supply voltage and gain?
I am new to designing audio circuit. Looking at TI TAS6424 class-D amplifier (https://www.ti.com/lit/gpn/tas6424-q1), on section 9.3.3 p.23, it mentioned volume control from -100 to +24 dB.
Given the ...
- 679
0
votes
0
answers
84
views
2-way speaker system tweeter phase
I'm in the middle of replacing stock speakers in the car with aftermarket speakers, and I've redone one door. The better difference in quality is very pronounced, but I wondered if I connected tweeter ...
- 304
0
votes
1
answer
69
views
I want to implement a 2-active crossover circuit with LM833 and amplify it using LM386 and now the problem is I couldn't understand the circuit [closed]
I can understand up to certain level that we used a buffer, low pass filter but I can not connect with circuit and coming to components we used 120 Ω, 6.8 nF for active crossover with power supply + ...
-1
votes
4
answers
352
views
Lowering power output from amp to speakers [closed]
I have a pair of 8 ohm speakers that are rated for max 60w and a receiver that outputs 160w and is rated for 8 ohms. I wired everything up and, as expected, even at minimum volume it was too loud. I ...
1
vote
1
answer
137
views
Fix for poorly designed class-D amplifier mute circuit
I recently made a PCB for a project with several class-D amplifier channels to drive small speakers for audio feedback. I included a mute switch which connected or disconnected one end of these ...
- 495
1
vote
1
answer
75
views
Designing an audio output circuit with 3 note polyphony for PIC18F45K20
Our project outputs three square waves from the PIC18 and is currently designed to go into an LM324 summing amplifier and then an LM386 audio amplifier to drive an 8ohm speaker. However, we have run ...
- 11