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Rf punch amp
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 |
Originally Posted by scottbigred
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 |
Originally Posted by scottbigred
RF Punch 200 a4 amp. the back of it says its 25x4 at 4ohms and 50x4 at 2ohms. we were trying to figure out what it puts out bridged at 4 ohms.
Scott Hope this helped, Devildog101:rocker: |
Which if a older RF amp is under rated.The older Punch series where one kick ass Amps.My RF amp came with a output sheet and all areas where above the spec's for the amp.The newer RF suck
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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.
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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.
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Originally Posted by scottbigred
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. |
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