Hello
I have a rockford fosgate punch p1000-1bd hooked up to a Power HX2 15" (RFR3115) subwoofer wired up to 1 ohm. I had it in the car for some time, but it was never playing how i would like it to. The amp is rated 1000W RMS at 1 ohm but it dosen't fell like 1000W, the sub bearly moves. Also i noticed that if i turn gain higher the amp start clipping so i have gain set to 4 out of 11 is this normal? I measured with an osciloscope that my headunit signal is not clipping and it's not, also checked the amps pdf and it says RCAs can go up to 5V but i only have 2V. The amp also hes something called Punch EQ whitch i have at 0 because if i turn that up the clipping just becomes worse, the amp dosen't have a clipping light but i measured the signal with an osciloscope and saw it was clipping alot. Also when i turn gain up and the amp starts clipping it starts to make some weird noise, I alreday opened the amp and checked the resistor that some people said it breaks, also took out the main capacitors and measured them and then were good. I was testing it on a bench with a stable 13.8V, the plus minus voltages inside are around +30V and -30V. I have a fealing that the problem might not be in the amp but in the preamp. Amp still works but it just dosen't feel like it is putting out the power it should. Or is this just normal for that amplifier? Could it be that my box is not good? i do have a 70L ported box but in the subs pdf it is suggested 100L box.
Any help would be greatly appreciated.
I have a rockford fosgate punch p1000-1bd hooked up to a Power HX2 15" (RFR3115) subwoofer wired up to 1 ohm. I had it in the car for some time, but it was never playing how i would like it to. The amp is rated 1000W RMS at 1 ohm but it dosen't fell like 1000W, the sub bearly moves. Also i noticed that if i turn gain higher the amp start clipping so i have gain set to 4 out of 11 is this normal? I measured with an osciloscope that my headunit signal is not clipping and it's not, also checked the amps pdf and it says RCAs can go up to 5V but i only have 2V. The amp also hes something called Punch EQ whitch i have at 0 because if i turn that up the clipping just becomes worse, the amp dosen't have a clipping light but i measured the signal with an osciloscope and saw it was clipping alot. Also when i turn gain up and the amp starts clipping it starts to make some weird noise, I alreday opened the amp and checked the resistor that some people said it breaks, also took out the main capacitors and measured them and then were good. I was testing it on a bench with a stable 13.8V, the plus minus voltages inside are around +30V and -30V. I have a fealing that the problem might not be in the amp but in the preamp. Amp still works but it just dosen't feel like it is putting out the power it should. Or is this just normal for that amplifier? Could it be that my box is not good? i do have a 70L ported box but in the subs pdf it is suggested 100L box.
Any help would be greatly appreciated.
What if you disconnect one of the voice coils of the subwoofer?
Then run only the other coil?
Does that change anything?
The amp should have more than ±30v. In BD amplifiers, you have to measure between the center terminals of the rectifiers (DON'T slip when measuring).
What's the PC# on the board?
Then run only the other coil?
Does that change anything?
The amp should have more than ±30v. In BD amplifiers, you have to measure between the center terminals of the rectifiers (DON'T slip when measuring).
What's the PC# on the board?
I have tryed disconnecting one of the voice coils, but that didn't make a huge diffrence. But that was before when i had gain set to 9 and the amp was clipping, I will try again tomorrow now that i have gain set properly. What would that tell me?
I was also measuring voltage between rectifiers (irfp260n) and it was around 58V i think, I have alredy put it back togeter and put it inside the car for testing.
On the PCB it says P1000-1BD 1325-52747-02
I was also measuring voltage between rectifiers (irfp260n) and it was around 58V i think, I have alredy put it back togeter and put it inside the car for testing.
On the PCB it says P1000-1BD 1325-52747-02
It could tell you if you have a bad coil or a polarity problem.
The 260N is an output FET.
The rectifiers are CR1004 and CR1005.
The 260N is an output FET.
The rectifiers are CR1004 and CR1005.
I will measure the rectifiers tomorrow and check the coils, can i also just check with a multimeter if coils are good?
When measuring the rectifiers what voltage should I be getting? can I use a multimeter or is it better with an osciloscope.
I will also try if it sounds better with a 500W ground zero amp I have.
When measuring the rectifiers what voltage should I be getting? can I use a multimeter or is it better with an osciloscope.
I will also try if it sounds better with a 500W ground zero amp I have.
A multimeter on the coils can tell you some things but not give a complete picture.
It will be safer to use a multimeter to measure the rail voltage. I've found long ago that if you tell people the answer that you're expecting, that's what you'll generally get.
It will be safer to use a multimeter to measure the rail voltage. I've found long ago that if you tell people the answer that you're expecting, that's what you'll generally get.
I tested both the coild one by one and they both seem to be playing the same, then i also measured then and they are both 2.4ohm with the wires and 0.55mH.
The voltage between CR1004 and CR1005 is 55V.
With my knowladge and testing i'm starting to think that either this is just how this amp is supose to work or that something is wrong with the preamp inside the amp or that it just sounds bad because my box is not the right size.
Also could it be that my battery voltage is dropping alot? but the amp never goes into protect.
The voltage between CR1004 and CR1005 is 55V.
With my knowladge and testing i'm starting to think that either this is just how this amp is supose to work or that something is wrong with the preamp inside the amp or that it just sounds bad because my box is not the right size.
Also could it be that my battery voltage is dropping alot? but the amp never goes into protect.
Yes and i currently don't have any capacitors but I ordered two 2F hifonics caps.
I have a 20mm2 (4 AWG i think) positive wire from the battery to the rear.
But i was testing the amp on my bench power supply which was pulling around 3A when playing a 40hz sine wave without a speaker and the amp was clipping at 4 out od 11 gain at 1V input signal. I would just like to know if it is normal for this amp to be clipping at only 4 out od 11 gain and if it is normal that the amp is always making a whining sound, but when i turn up the gain or punch EQ and the amp starts to clipp it starts to make a diffrent whining noise.
I have a 20mm2 (4 AWG i think) positive wire from the battery to the rear.
But i was testing the amp on my bench power supply which was pulling around 3A when playing a 40hz sine wave without a speaker and the amp was clipping at 4 out od 11 gain at 1V input signal. I would just like to know if it is normal for this amp to be clipping at only 4 out od 11 gain and if it is normal that the amp is always making a whining sound, but when i turn up the gain or punch EQ and the amp starts to clipp it starts to make a diffrent whining noise.
The two caps are unlikely to do anything.
What's the battery voltage measured directly across the B+ and ground terminals at idle and at higher power output? Measure both.
Does the car start easily with that battery?
What's the battery voltage measured directly across the B+ and ground terminals at idle and at higher power output? Measure both.
Does the car start easily with that battery?
I measures it today, when car is off battery is at 11.8V and the car starts easily, when i turn it on its at 14.05V. Also measure the input amperage and its 80A at max volume. At the speaker output i measured 20A.
So i guess this amp is just has very sensitive gain so i have to be very careful when setting it so the amp is not clipping.
The sub is probably not playing the best because the box is a bit too small.
So i guess this amp is just has very sensitive gain so i have to be very careful when setting it so the amp is not clipping.
The sub is probably not playing the best because the box is a bit too small.
To my point of view 11.8 is a very low voltage for a good battery.
If your measurement is accurate then your battery is death.
If your measurement is accurate then your battery is death.
What is the voltage measured directly across the B+ and ground terminals of the amplifier when it's drawing 80 amps of current?
So i measured the battery voltage again with a better multimeter and it it 12.23V when car is off,14.15V when car is running. When pulling 80A it goes down to 11.3V. Measured all of that directly across B+ and GND on the amp.
Did it sound better with the 500w amplifier? If so, have you tried driving a sine wave test tone (100Hz) into both amps and measuring the AC voltage across the speaker terminals at clipping to see which amplifier produces higher voltage to the speaker?
11.3v is very low and more what I'd expect with the battery alone (no charging from the alternator). Did you try it at higher engine RPMs to see if the voltage would remain higher?
11.3v is very low and more what I'd expect with the battery alone (no charging from the alternator). Did you try it at higher engine RPMs to see if the voltage would remain higher?
After some more testing, using a diffrent amp and trying some other stuff I have come to the conclusion that the amp is working how it should it is just very sensitive to clipping so you have to be very carefull when setting gain. The woofer playing "bad" I think is just because my box is too small.
In the future I might build a new box and add another battery in the trunk, but for now I will leave it how it is.
Thanks for all your help.
In the future I might build a new box and add another battery in the trunk, but for now I will leave it how it is.
Thanks for all your help.