
Home  Forums  Rules  Articles  The diyAudio Store  Gallery  Blogs  Register  Donations  FAQ  Calendar  Search  Today's Posts  Mark Forums Read  Search 
Solid State Talk all about solid state amplification. 

Please consider donating to help us continue to serve you.
Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving 

Thread Tools  Search this Thread 
6th December 2009, 02:53 AM  #1 
diyAudio Member
Join Date: Dec 2009

Voltage Vs Wattage question ?
Hello all i am new to this forum and would like to ask a question i am a newbie to this forum have had a small amount of experience with electronics but am confused as to why some sites state that for a certain wattage output of an amp you need a minimum voltage
is it possible to use higher rated components to deliver more current at the same voltage or does this create interference thanks in advance to all replies 
6th December 2009, 03:38 AM  #2 
diyAudio Member
Join Date: Jun 2008
Location: SoCal

It all depends on the load(speaker), for a given output(wattage) a 16 Ohm load will need a higher voltage,less current than a 4 Ohm load less voltage, more current. This is for solid state only, hollow state(tube) is another matter. Ohms law and various other formulae bare this out.
Craig 
6th December 2009, 03:42 AM  #3 
diyAudio Member
Join Date: Dec 2009

Say my load is a 4ohm speaker and i want to supply it with 300 watts, how could i get around using a low supply voltage with an amp
and what is a good smps that will deliver enough current and voltage for 2 tas5630's 
6th December 2009, 04:17 AM  #4 
diyAudio Member
Join Date: Mar 2008
Location: Portland OR

Little bit of math here, Ohms Law.
Voltage = Current * Resistance, V=IR Power = Voltage * Current, P = VI if we sub in V=IR into the power equation, P=VI we can get 2 alternative forms for power. P = I*I*R P = (V*V)/R This is where a given wattage requires a certain amount of voltage into the load, R. 
6th December 2009, 04:58 AM  #5  
diyAudio Member
Join Date: Dec 2009

Quote:
I am guessing car amps that produce high wattages run an internal inverter or smps. a bit off topic but what is a good mosfet amp with crisp audio that can produce alot of power 

6th December 2009, 10:54 AM  #6 
diyAudio Member
Join Date: Nov 2009
Location: Cape Town


Thread Tools  Search this Thread 


Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
wattage question  rtill  Solid State  14  23rd January 2009 12:06 PM 
Resistor wattage question  DeadSpeaker  Solid State  12  17th March 2008 10:41 PM 
Does preamp wattage effect power amps wattage?  JonnySwitchblade  Solid State  7  4th July 2007 04:18 AM 
Resistor/LPAD wattage question  DerrickM  MultiWay  13  15th April 2007 10:10 AM 
power amp into 412 Wattage question  twizza  Solid State  11  16th June 2005 11:40 AM 
New To Site?  Need Help? 