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08-01-2014, 01:25 PM | #276 | |
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But I am seeing now that jesuitson used a calibrated mic and measured the speaker response. So we are talking about 2 totally different types of clipping. Jesuitson, the o-scope measures the signal. with the premium HU, volume level 25 is the max level to which it will send a clean signal to your speakers (or amps/LOC/DSP if you are using a level input off the stock HU). Your measurement is jsut the response from your speakers so your HU is sending a clipped signal to the speakers but that doesnt mean your speakers will clip. Make sense?
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08-01-2014, 08:31 PM | #277 |
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Last edited by Jesuitson; 08-02-2014 at 12:40 PM. |
08-01-2014, 09:02 PM | #278 |
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delete
Last edited by Jesuitson; 08-02-2014 at 12:40 PM. |
08-02-2014, 10:37 AM | #279 | |
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The o-scope measurement is taking at the output of the stock HU (before it ever touches an aftermarket amp or dsp or the stock speakers). The o-scope measures the clipping in the raw signal. The stock premium HU begins to send a clipped signal at volume 26 (25 being the highest non clipped volume). This has nothing to do with the sound from the speakers at this point. here is a theoretical situation.... For owners wanting to upgrade using the JBL MS8 from the stock HU, you would connect the high level inputs to the tsock HU speaker outputs. The MS8 will then (during the setup) measure the signal coming in to un-eq it and make the signal as balanced as possible. To do this most effectively, you will want to send the best stock signal as possible. This is where the O-scope measurement comes in. If you send the MS8 a clipped signal, it will have a much harder time analyzing it and doing its job. The max volume you would want to use while performing this is 25. now after you install the ms8 and add your amps and perform the setup, this is where your test with the calibrated mic comes in to RTA the system. Does that explanation help at all? Hope it isn't confusing. |
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08-02-2014, 11:35 AM | #280 |
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Last edited by Jesuitson; 08-02-2014 at 12:40 PM. |
08-02-2014, 11:44 AM | #281 |
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Resonance/Decay times
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Last edited by Jesuitson; 08-02-2014 at 12:40 PM. |
08-02-2014, 12:14 PM | #282 | |
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Last edited by nightVzn; 08-02-2014 at 12:26 PM. |
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08-02-2014, 12:32 PM | #283 | |
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08-02-2014, 12:39 PM | #284 |
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You're right. I apologize. This really isn't a technical forum.
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08-02-2014, 05:19 PM | #285 |
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hey, bud its all good. More information that is out there the better.
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08-08-2014, 05:58 PM | #286 |
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Just to clarify something, so by default, if you have a sedan, your EQ settings is equivalent to the "1 + 2 + TUNE (right knob)", and you can switch it to THROUGH MODE by pressing "1 + 4 + TUNE (right knob)".
Now if you want to go back to the default EQ then you just press "1 + 2 + TUNE (right knob)". Is that right? |
08-08-2014, 11:37 PM | #287 | |
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08-09-2014, 12:46 AM | #288 |
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08-11-2014, 07:04 AM | #289 | |
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It is good to know where the HU itself works well. Also what is going on with the actual sound being heard. BTW, Thank You for clarifying the EQ thing. I believe I understand what you were getting at when you said "to a point". Please correct me if I'm wrong: If the HU is near the point of clipping already, then bumping the EQ, (treble, bass, midrange), could push that into the clipping zone? In any case, it is nice to know where you are still getting clean sound. John |
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08-11-2014, 09:23 AM | #290 | |
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Eager to hear any clarification (no pun intended) on this point. |
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08-11-2014, 09:39 AM | #291 |
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correct. This is why it is preferred to cut, rather than to boost.
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08-11-2014, 09:52 AM | #292 | |
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That's assuming if I cut EQ, I might turn up the volume slightly to compensate, and if I boosted EQ, I might turn the volume down slightly. Is it a wash in that case, or is one way better than the other? I'm wondering if the electrical capability of the built-in amp is taxed differently by boosting volume vs. by boosting EQ. I realize each approach would result in somewhat different frequency characteristics (thinking back to the chart way earlier in this thread that graphed the effect that boosting B, M, and T each had on the shape of the curve), so if it's the same either way as far as quality goes, it might be up to personal preference. |
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08-11-2014, 09:56 AM | #293 | |
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If you cut frequencies in the EQ and then turn the volume up louder, you are likely to cause damage quicker. Also, the HU will only boost a certain voltage. Once you meet that voltage, you cant boost more. Cutting will allow you to minimize the use of your EQ voltage. |
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08-11-2014, 10:13 AM | #294 | |
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I'm not pushing my system hard enough to break anything, so at worst, sound quality suffers. I like my music loud, but not that loud. Plus I have the OEM Kicker sub, and its crossover greatly limits the bass that reaches the cabin speakers, so they're not taking nearly as much abuse as they might be otherwise. So are you saying if I'm not cranking it up enough to damage anything, cutting EQ while boosting volume slightly is better than the opposite? In terms of sound quality. |
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08-11-2014, 10:18 AM | #295 |
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you dont tweak the EQ just to get more volume out of your system. You set the volume to your listening level and tune the EQ there.
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08-11-2014, 10:27 AM | #296 | |
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As bob stated, EQ is not to make your radio louder. It is simply to fine tune your system to get the best sound quality possible and to match your own personal tastes. If you having trouble fully understanding it, try adjusting the EQ on your radio. Adjust each one separately, once you hear the difference, it may be easier for you to understand it. |
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08-11-2014, 10:54 AM | #297 | |
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For instance, I could create a typical "rock EQ" curve by running B+5, M 0, T+3, or by running B 0, M-5, T-2. The relative differences between the values are the same in both cases, and the frequency curve would be about the same shape, but I'd have to turn up the volume a notch or two to get the same effective volume in the second case. And my question to bobditts was, which way would yield better sound quality given the performance characteristics of the sound system as he's measured them: boosting EQ at a slightly lower volume, or cutting EQ at a slightly higher volume. I'm also well aware that I could get better quality at higher volumes with upgraded amp + speakers. That's not what this thread is about. It's about getting the best possible results from the stock system, and my question pertains directly to that goal. |
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08-11-2014, 10:58 AM | #298 |
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provided you could get the same results, it wouldnt matter. however, starting with a signal that is already clipping is not going to yield the same results. Boosting a signal at the lower volume could cause the signal to clip.
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08-21-2014, 04:58 PM | #299 | |
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I'm an EE and I really appreciate this. |
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08-21-2014, 08:03 PM | #300 | |
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