2. amps-preamps
  3. 142369-117192

This question is aimed to TRUE Elec Engineers, not fuse or wire directionality believers.


Has any of you ACTUALLY worked with and recommend a SSR which does not introduce any audible distortion on the speaker line and which can operate with a large range of trigger voltages (12 - 48 VDC, may need to have on board voltage regulator for this range).  I am building a speaker DC protector and do not want to use electro mechanical relays becoz of DC arcing and contact erosion issues.  It needs to be capable of switching up to 15 amps at about 100 volts.

Only TRUE engineers reply please.

Thanks

cakyol
gibsonian
73 posts
 
3:18am
Hi Gibbs
I was referring to the main drivers that will burn, I am well aware of the audio bypass cap on tweeters...which wont pass dc.ANDthere are speakers out there with a resistor to limit the tops, so they could be smoked.Many retro speaker systems used a resistor on the tops.

A simple in line fuse will protect your main drivers that have no blocking capacitor.    I have much experience with this as well.
imhififan's avatar
imhififan
2,238 posts
 
Accuphase

http://www.accuphase.com/pdf/p-4500_e.pdf
https://www.widescreenaudio.be/wp-content/uploads/2017/11/e-650_protection_circuit_3.jpg
batman1971
96 posts
 
I would recommend getting any older full sized soundcraftsman amp And take it apart.   if your goal is to kill the dc at the rails before it reaches the speakers they did this back in the 80s 
ssg308's avatar
ssg308
111 posts
 
crydom D2450 it has 50A at 240V and yes when control voltage drops below 3V it will disconnect.
Control voltage between 3-32V
flapjack
116 posts
 
Hope I don't get into hot water here for the link.

https://www.ebay.com/itm/New-VHC-1-SPDT-Vacuum-Relay-26-VDC-for-RF-Switching/390332847631?hash=item5...

These could be triggered by a conventional circuit. I've used them to handle a couple kilowatts of RF. Trigger time is in the low milliseconds.
There may even be quicker ones. Contacts are vacuum sealed and very tough. There are RF types and high current DC types. Either should handle anything you can throw at them.
More to discover