Menu
Forum
What's new
New posts
Live Activity
Search forums
Members
Registered members
Classifieds Member Feedback
Car Audio Discussion
General Car Audio
Car Audio Build Logs
Car Audio Equipment
Subwoofers
Speakers
Amplifiers
Head Units
Car Audio Help
Wiring, Electrical and Installation
Enclosure Design & Construction
Car Audio Classifieds
Car Audio Classifieds
Car Audio Wanted
Classifieds Member Feedback
Gallery
New media
New comments
Search media
SHOP
Shop Head Units
Shop Amplifiers
Shop Speakers
Shop Subwoofers
Shop eBay Car Audio
Log in / Join
Test
Forum
Search
Search titles only
Search titles only
Log in / Join
Search
Search titles only
Search titles only
What's new
New posts
Live Activity
Search forums
Members
Registered members
Classifieds Member Feedback
Menu
Reply to thread
Forum
Car Audio Equipment
Amplifiers
How to function test an amp w/o speakers.
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
.
Message
<blockquote data-quote="dragonrage" data-source="post: 7276209" data-attributes="member: 574321"><p>If you measure an AC signal with your DMM set to DC, it WILL register a voltage, and that does NOT mean that the amp is outputting DC. This is not good advice.</p><p></p><p>It would read the average voltage, which is 0.637 times the peak voltage for a steady waveform. AC mode will read the RMS voltage, which is 0.707 times the peak voltage.</p><p></p><p>However, measuring a DC signal with the DMM on AC mode will register 0 volts if either the output or the DMM itself is capacitively coupled. That doesn't matter for this case, though.</p><p></p><p>By the way, some amps don't like being run without a load. I wouldn't recommend this test. I'd recommend bringing some sort of sub/speaker with you to test it on, even if low volume.</p></blockquote><p></p>
[QUOTE="dragonrage, post: 7276209, member: 574321"] If you measure an AC signal with your DMM set to DC, it WILL register a voltage, and that does NOT mean that the amp is outputting DC. This is not good advice. It would read the average voltage, which is 0.637 times the peak voltage for a steady waveform. AC mode will read the RMS voltage, which is 0.707 times the peak voltage. However, measuring a DC signal with the DMM on AC mode will register 0 volts if either the output or the DMM itself is capacitively coupled. That doesn't matter for this case, though. By the way, some amps don't like being run without a load. I wouldn't recommend this test. I'd recommend bringing some sort of sub/speaker with you to test it on, even if low volume. [/QUOTE]
Insert quotes…
Verification
Post reply
Forum
Car Audio Equipment
Amplifiers
How to function test an amp w/o speakers.
Top
Menu
Home
Refresh