ive got a buddy with an older RF Punch 200 a4 amp. the back of it says its 25x4 at 4 ohms and 50x4 at 2. he got it from his brother and has no paperwork with it at all. i searched and searched but couldnt find anything. we were trying to figure out what it puts out bridged at 4 ohms. im thinkin of buying it from him to amp my front speakers when i get them.
Scott

 

*most* amps when bridged put out there 2ohm rating. I say *most* because some are a little higher, some lower. but sry, that amp, i'm not sure.

 

That amp puts out 100 x 2 @ 4 ohms bridged.

Hope this helped,

Devildog101

 

Which if a older RF amp is under rated.The older Punch series where one kick *** Amps.My RF amp came with a output sheet and all areas where above the spec's for the amp.The newer RF suck

 

Well, the way to find out is to get a 4 ohm load resistor. Hook that up and run a 1kHz 0dB sine wave through it. Then get the voltage reading and do the math. Do it per each channel and bridged. See what you get.

 

yeah, i go back to school next week and was wondering about asking how to hook it up to check it. so i would need just a DMM and a Frequency Generator to check it? and a 4ohm resistor? i guess i always assumed that output was dictated by the note being played and how much demand was being put on the amp? how exactly would i go about doing this Low.

 

Make sure all gains set right. Then run a 1kHz sine sweep recorded at 0dB. Put a 4 ohm load resistor like you would hook up a speaker. And then grab your DMM and check voltage.

USE PIE and TIRE formulas to figure out whats what.

Tire = Voltage
Amperage x Resistance

PIE = Power
Amperage x Voltage


_____n Volts________
s Amps (figure out) x 4ohms

______y Power_______
s Amps x n Volts

(EX.)
_______ 12 Volts_______
s Amps x 4 ohms
s = 3 Amps

______y Power______
3 Amps x 12 volts

y= 36 Watts.