Hello
I am looking at installing one of these into my amplifier to try and prevent my children and other youths damaging my speakers.
https://www.ebay.co.uk/itm/38483493...rentrq:0e11d7241870a77d3328108cfffff928|iid:1
Amp board: https://store.sure-electronics.com/product/256
Power supply: https://www.meanwell-web.com/en-gb/ac-dc-single-output-led-driver-mix-mode-cv-cc-with-hlg--240h--36a
The speakers are two way DIY 17cm bass reflex with silk dome tweeter. Would have to look up drivers.
Do they work?
Are they any good?
Will it degrade the sound quality?
I am looking at installing one of these into my amplifier to try and prevent my children and other youths damaging my speakers.
https://www.ebay.co.uk/itm/38483493...rentrq:0e11d7241870a77d3328108cfffff928|iid:1
Amp board: https://store.sure-electronics.com/product/256
Power supply: https://www.meanwell-web.com/en-gb/ac-dc-single-output-led-driver-mix-mode-cv-cc-with-hlg--240h--36a
The speakers are two way DIY 17cm bass reflex with silk dome tweeter. Would have to look up drivers.
Do they work?
Are they any good?
Will it degrade the sound quality?
As long as contacts in relay are new and clean, there should not be any signal degradation. Its like speaker connectors on the back of the amplifier. If they are clean, they work just fine.
Sure it will work, if its build with real parts and not fake chinese counterfeit parts.
Sure it will work, if its build with real parts and not fake chinese counterfeit parts.
the first board has 1 1/2 hp 240vac rated relays. These relays are not rated for DC, which direct coupled transistor amplifiers produce when an output transistor shorts. These relays might work on a 50 watt/ch amp. As the size of the rail capacitors goes up, the size of the arc that must be quenched goes up. AC arcs quench 60 times per second. DC arcs quench when the metal plasma stops flowing- or the contacts weld together. I buy blown up PA amps where the manufacturer has tested the relay installed to break the arc. DC rated relays (tungsten contact parallel brass contact) are > $50 each.
DC on speaker is not the biggest hazard with children or inexperienced operators. Clipping or crunch guitar pedals produce massive high frequency energy which exceeds tweeter ratings ( AES is pink noise) and can melt woofer coils. Some PA amps have a feature like Peavey DDT which turns the volume down if too much high frequency content is detected.
Pro sound setups have a compressor between mixer & power amp to reduce volume peaks and limit current out of the amp in the wrong frequency bands.
Setups involving a microphone can howl from feedback, bang from a dropped mike, or cables can come loose and cause a loud pop. PA speakers have a tungsten bulb series the tweeter to heat up and reduce current if too much high frequency sound has occured. These can be added aftermarket, but the ones sold for 500 w PA speakers are too big for home tweeters rated at 10 or 20 watts. Dome tweeters are particularly fragile.
My Peavey SP2(2004) with tweeter tungsten protection are the lowest distortion speakers I've heard in this flyover city. As I play them at 1/8-70 watts, I have no idea how they sound at 300 seat shows at full power, 500 watts RMS. (AES)
DC on speaker is not the biggest hazard with children or inexperienced operators. Clipping or crunch guitar pedals produce massive high frequency energy which exceeds tweeter ratings ( AES is pink noise) and can melt woofer coils. Some PA amps have a feature like Peavey DDT which turns the volume down if too much high frequency content is detected.
Pro sound setups have a compressor between mixer & power amp to reduce volume peaks and limit current out of the amp in the wrong frequency bands.
Setups involving a microphone can howl from feedback, bang from a dropped mike, or cables can come loose and cause a loud pop. PA speakers have a tungsten bulb series the tweeter to heat up and reduce current if too much high frequency sound has occured. These can be added aftermarket, but the ones sold for 500 w PA speakers are too big for home tweeters rated at 10 or 20 watts. Dome tweeters are particularly fragile.
My Peavey SP2(2004) with tweeter tungsten protection are the lowest distortion speakers I've heard in this flyover city. As I play them at 1/8-70 watts, I have no idea how they sound at 300 seat shows at full power, 500 watts RMS. (AES)
The board only protects the speakers from a power on thump, if the amp has one, and DC that the amp could produce if it fails. These are not things kids do.
It will not protect your speakers if the kids happen to turn the volume way up and then turn on the amp, which may blow the speakers.
That depends on the power handling of the speakers vs. the max output of the amp.
You would need to limit the amp or pre-amp output to avoid over driving the speakers.
Many years ago my young kids blew out a pair of speakers because I left the system input on CD and the next day, while I was at work, they wanted to watch a video. There was no sound, so they turned it up. Still no sound, so they turned it up more. Finally they switched the input to VCR, which was already running and kaboom. They said "it was really loud, then it stopped, and now it doesn't work". All I could do was replace the speakers and teach the kids a little more about the system. Never happened again and we still laugh about 25 years later.