Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Registered members
Current visitors
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
DIY & Tutorials
DIY For Audio
Help me "flick a relay" (QSC USA 1300 Amplifier)
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support AVForums:
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="gbyleveldt" data-source="post: 62928" data-attributes="member: 122"><p>Noooo!!!! Never connect speakers till you confirmed you don't have DC on the output. The relay is there to specifically protect the speakers from damaging DC.</p><p></p><p>Yes, it will still amplify, depending on the type of failure. You will have excessive distortion though. It's also debateable if it's amplifying or if it's the pre-drivers providing voltage gain into a lightish load. Please check for DC first, then proceed to check the output transistors for proper operation by checking their hFE's. To prevent one transistor messing around readings of other transistors in these parallelled configurations, you can remove the emitter resistors. BUT BE CAREFULL!</p></blockquote><p></p>
[QUOTE="gbyleveldt, post: 62928, member: 122"] Noooo!!!! Never connect speakers till you confirmed you don't have DC on the output. The relay is there to specifically protect the speakers from damaging DC. Yes, it will still amplify, depending on the type of failure. You will have excessive distortion though. It's also debateable if it's amplifying or if it's the pre-drivers providing voltage gain into a lightish load. Please check for DC first, then proceed to check the output transistors for proper operation by checking their hFE's. To prevent one transistor messing around readings of other transistors in these parallelled configurations, you can remove the emitter resistors. BUT BE CAREFULL! [/QUOTE]
Insert quotes…
Verification
Post reply
DIY & Tutorials
DIY For Audio
Help me "flick a relay" (QSC USA 1300 Amplifier)
Top