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amplifier - Can a malfunctioning relay in an amp cause or ...
https://electronics.stackexchange.com/questions/170901/can-a-malfunctioning-relay-in-an-amp-cause-or-allow-a-speaker-to-crackle-when-tu#:~:text=The%20coil%20of%20the%20relay%20is%20powered%20by,DC%20into%20the%20speaker%20as%20the%20power-supply%20fades%29.
ePanorama.net - Audio amplifier output relay delay
https://www.epanorama.net/circuits/ampdelay.html
When the output voltage of Q2 is high enough (typically around 16..20V) the relay goes to on state and the relay witches connect the speakers to the amplifier output. It takes typically around 5 seconds after power up until the relay starts to condict (at absolute time depends on the size of C2, relay voltage and circuit input voltage).
Audio Amplifier Output Relay Delay - EEWeb
https://www.eeweb.com/audio-amplifier-output-relay-delay/
When the output voltage of Q2 is high enough (typically around 16..20V) the relay goes to on state and the relay witches connect the speakers to the amplifier output. It takes typically around 5 seconds after power up until the relay starts to conduct (at absolute time depends on the size of C2, relay voltage and circuit input voltage).
Audio amplifier output relay delay | diyAudio
https://www.diyaudio.com/community/threads/audio-amplifier-output-relay-delay.32465/
Audio amplifier output relay delay. Thread starter PH; Start date 2004-04-18 5:08 pm; P. PH Member. 2004-01-22 11:56 am SLOVENIA. 2004-04-18 5:08 pm #1 2004-04-18 5:08 pm #1 Anyone knows for a good schematic for amp output delay circuit?
Audio Amplifier Output Relay Delay Circuit Diagram
https://www.learningelectronics.net/circuits/audio-amplifier-output-relay-delay.html
Audio Amplifier Output Relay Delay Circuit Diagram Component list C1 = 100 uF 40V electrolytic C2 = 100 uF 40V electrolytic D1 = 1N4007 D2 = 1N4148 Q1 = BC547 R1 = 33 kohm 0.25W R2 = 2.2 kohm 0.25W RELAY 24V DC relay, coil resistance >300 ohm Circuit operation:
Time delay in audio amplifiers - Hydrogenaudio
https://hydrogenaud.io/index.php?topic=114705.0
Exactly my point - a delay of (as he asserted) 500 µS would be 1/2 wavelength at 1 KHz (not 2 as I mistakenly said above) and at that frequency would provide positive feedback instead of negative at the amplifier inverting input. That would turn the amplifier immediately into an oscillator assuming its gain was >1 at that frequency.
Speaker Protection circuit - Hifime Audio
https://hifimediy.com/download/Speaker_Protection_Circuit.pdf
threshold value is reached the output pin 6 will toggle and the relay will close, allowing the amplifier to be connected to speakers. The value of C6 and R8 determines the delay time and the values of the R2 and R3 determines the maximum DC offset voltage allowable before the CircuitSpeaker Protection will disconnect the relay.
Soft Start & Speaker Turn-On Delay / DC Protector Combo ...
https://diyaudiostore.com/products/soft-start-speaker-turn-on-delay-and-dc-protector-boards
Description This pack includes one Soft Start Board and one Speaker Turn-On Delay and DC protector board. They are not available for purchase separately. Soft Start Board Every time you switch on your monster (or not so monster) power amplifier, the initial current drawn from the mains can be many times that of full power.
Other Audio Related Projects – BuildAudioAmps
http://buildaudioamps.com/other-audio-related-projects/
This project uses the uPC1237 an integrated circuit made by NEC; designed for protecting stereo power amplifiers and loudspeakers. It features AC power OFF detection, time delay to connect speakers to amplifier, and negative or positive output offset DC level detection. Please refer to upc1237 datasheet for more information.
Simple speaker delay circuit | ElecCircuit.com
https://www.eleccircuit.com/simple-delay-speakers/
This circuit is a delay time to turn on-off your speaker. The easiest basis of principle. While we turn on a power amplifier. The speaker delay circuit will disconnect the speaker. It waits for the spike voltage lost before. Then it connects a speaker in normal again. Ago you would see me try to show you a simple circuit. This too.
Switching Controlled by an Audio Signal | Radio Design Labs
https://www.rdlnet.com/blog/tips/switching-controlled-by-an-audio-signal/
The adjustable delay duration is the major difference between the two relays: ST-ACR1 Adjustable delay ½ second to 5 seconds ST-ACR2 Adjustable delay 5 seconds to 50 second The ST-ACR1Mis actuated by microphone level signals. The threshold sensitivity can be adjusted to trigger on signals between -65 dBu and -20 dBu.
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