Thank you. Basically I want to push all 1500 RMS or close to it but not sure you could do that without bass boost. I take the 100 to be the nominal rating in that? The instructions for the LC7i say that its gain should be set high and the amp's set low. I bought them from Crutchfield. Here's a step-by-step guide to installing a car amplifier, including how to run the cables through your car and how to wire the amp. The Rockford Fosgate P2 12” subwoofer continues “The PUNCH” tradition. I'm guessing I will be using the tone that clipped the fastest while setting the head unit audio correct? Is the amp working harder in the first scenario vs the second? Can't find the test tone disc. Thank you....do i need to connect the amp wires in series?? 3 use the same test tone tracks for setup. Depending on your setup, you may need to hold Alt/Option key before clicking tone link to avoid playing file. Robert Stevens February 12, 2020. I'm a little confused and frustrated. Great info here. I've since switched the speakers to 4 ohm to introduce a 2 ohm load and then I wired in a 12 inch earthquake dbxi in parallel to bring it back to a 1 ohm load. Instructions for setting amp gain using test tones; Download 0 dB sine wave test tones of 40, 100, 400, 800, and 1000 Hz to your preferred medium (disc, chip, file, phone). After downloading, you can burn them to a CD or store them onto a thumb drive for playing later. I get up to 7 but ohms law calls for 14.14. That explained some of the "extra" power. This cant be right either. John. How do you prevent the other speakers in the car from not playing the test tone? Thanks! Their toll-free number would be on your invoice. The two times I did this test, I got two different results. C. L. E. A. N. gain setup system test tones available as MP3 download from Amazon On Demand, Rhapsody, Google Play, and Spotify, labeled "3sixty. Our Advisors test and install gear in their own vehicles. The short duration of the time it takes setting gain shouldn't endanger your speakers. Is that the right approach? In doing my math, should I first test the positive/negative speaker lead to the sub to get the exact ohms for my calculation? Pascal, I don't recommend using a multi-meter to set an amplifier's gain because it'll only read voltage accurately around 60 Hz and can't tell you if the signal's clipped or not. Please enter your email address below. I turned up the gain to the amp’s top clean-playing point and read the volt meter. If I had wanted to, I could have set the amp’s output to exactly 50 watts, by turning the gain down until the voltage read a targeted number, in this case 14.14 volts AC. 4) Your multimeter's AC volts RMS readings may not be accurate at the frequency tone you're using. I don't have a dummy 2 ohm load rated for that kind of power. Clipping doesn't seem to be a problem for me. I would recommend setting gains to music, not tones, with a flat EQ. You should leave the receiver set at its maximum clean output in order to achieve optimum amp gain setting. Still a bit confused. Repeat Step 2, noting the top clean volume settings, using the 100, 400, 800, and 1K Hz tones. The 100 Hz tone rattled everything on the desk, so it was a little difficult to pick the buzz-point out of the crowd of reverberations. But the amp definitely performed above its specified rating. The 100 Hz tone alone will do for both subwoofer and full-range speaker amps. Adding 50% more power doesn’t result in 50% more bass. Brian, Finding the maximum clean volume of your receiver is unaffected by the amplifier's gain setting. You can download "0-dB" test tones for free from the internet - a web search will turn up a vast selection. Do I do each speaker individually by going to front left, FR,RL,RR? Is it okay to play a 50 Hz test tone on my actual sub or will I damage it? Thanks for sharing your knowledge! Does your amp has boost power supply to get 17.2 V RMS? When it distorts, you can clearly hear it buzz. 4 channel pioneer GM D8604 Also what crossover setting do u recommended setting them all too. So once gains are set, do you then reduce the sub amp gain until it sounds matched with the lower power amplifier ? Kevin, You should set your receiver's EQ and the amp's bass boost to the way you normally listen to your music, before finding maximum clean volume and setting amp gain. My head unit preout is 4V and my 4-ch amp gain setting is 4V at full counter-clockwise and 150mV at full clockwise. And now it doesn't sound nearly as good but an R&B it's definitely louder and shakes everything more. I think either I was a little more or less sensitive to the singers’ voices on different days, and noticed changes at different levels than I could see in the waveforms’ shapes, or the music CDs I used were recorded at a different reference levels. My experience was excellent, website is unmatched & customer support is top notch. It’s available for a nominal rental fee, and includes a $25 Crutchfield merchandise credit. Then, while playing music I could use the remote knob to turn down the bass to desired levels, knowing that I could not worry about turning it up to max if desired. Definitely recommend them. The reason is that I have a 12" DVC sub wired in parallel that can handle 300 watts RMS, but the Alpine amp powering it can put out 500 watts RMS in 2-ohm mode. We’ve carefully chosen the components of this kit to ensure a crystal-clear listening experience. The item “Rockford Fosgate PBR400X4D 4 Channel 400 Watt Punch Compact Amplifier … Crutchfield: Audio, video, and more. When tuning the amps do you have the filters off? After turning the receiver down a little, restoring the fine quality of the singer’s voice, I turned up the amp gain until I heard the same thing. Maybe that one speaker wire is picking up noise somewhere in the car? But the answer to your question is that to put out 100 watts RMS through a 3-ohm load takes 17.3 AC volts RMS. I disconnected all other speakers to make sure it wasn't a polarity issue, but issue persisted. I measured the receiver’s distortion-free top volumes for the other test tones on the disc. Calls may be recorded for training and quality control purposes. Playing a distorting tone loudly might eventually damage a speaker, but not for the short time needed to set an amp's gain. Sincerely appreciated. » Online Users: 360: I also attached two sets of probes to a pair of speaker wires, one going to a voltage meter and the other to an oscilloscope. That said I then went on to check the output voltages after all had been set with lovely sine waves on the scope. When setting the gain of my amp I'm targeting 30Vp-p for a 450W output on my 2ohm sub. Just be sure, when setting the gain, that your source is at its highest level with no clipping and your multimeter is accurate at the frequency of the tone you use. For example, if your receiver clips 4k Hz at a lower volume setting than any other signal, you'd use that tone to set amp gains. Applying some bass boost after setting the gain, for example, will result in clipping. Where should I mount it? It lets you compare sonic characteristics between speakers. The foam kind that you fit in your ear canals lessen the volume but don't change the tone. i installed Infinity Reference 6532ix's (coaxial) in the rear door of my 2016 Chevy truck and Infinity Reference 9630cx's (components with passivize crossovers) in the front. By simply replacing my P3 subwoofer with a 1-ohm Rockford Fosgate T1S1, I introduced an element that moves more air (greater excursion), handles more power, and (the initial goal) allows the amplifier to deliver its full 516-watt rating. Achieving full power in an amplifier depends on setting the gain correctly, not on the tone of the bass signal. Back off the volume until the hum returns, and write down or mark the volume setting. 1) The receiver's output may not be set to its maximum level short of distortion. But seeing as most people don’t have oscilloscopes, I thought that maybe by listening to the tones through speakers, one could also set an amplifier’s gain correctly. Our CEO, Bill, is a huge animal lover. Thanks again. So I switched to a clear-voiced female vocalist singing swing. When I'm setting the amp gain for my sub's?, what test tone frequency should I use to most easily distinguish clipping and distortion? You can measure the signal's peak-to-peak voltage with your scope, as well as see when it clips. But I proved to myself, at least, that the ear-and-tone method worked just as well and as accurately as using a scope. Rear speaker is full range. 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