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UK & Ireland S2000 CommunityDiscussions related to the S2000, its ownership and enthusiasm for it in the UK and Ireland. Including FAQs, and technical questions.
Columns are as follows:
First is the frequency to be boosted or cut
Second is the level, i.e. how much cut or boost is applied
Third is the Q, which defines how "wide" the boost or cut is. Alpine units give you values of 1, 1.5 or 3.
As a rough guide, if we were boosting at 100Hz, a Q of 1 would affect frequencies from 95Hz - 105Hz, a Q of 1.5 from 90Hz to 110Hz, and a Q of 3 from 80Hz to 120Hz (those aren't real values but hopefully explain it.
What youre tryig to do with EQ is to smooth out the peaks and troughs in the frequency response. The "After" curve is essentially a smooth slope, which is what we want to achieve. The bumpiness in the curve is caused by the acoustics of the car.
For my figures, you can see that the first small dip in the curve is at 60Hz or so. We want to smooth that out, and go from the first peak to the second peak smoothly.
Therefore I choose to use the closest value to that which the Alpine lets me, in this case it's 63Hz. (We can't just choose an exact frequency unfortunately).
To remove the trough, we apply a boost, hence the +3
It's quite a narrow little trough, so I've chosen a Q of 1.5.
For the next setting, we can see the big, wide trough at 500Hz. I think the nearest the Alpine would let me do here is 400Hz, We need a boost here, so i've gone for +3, a higher figure might be more appropriate, but I'm not so keen on going overboard with EQ levels. As this is a wide trough, I've gone for the biggest Q value to compensate.
A good read of the manual will tell you how to change all the values. It varies from HU to HU.
The measurement is part of Alpine's Imprint system which comes as part of the 9887R - you also need a kit (KTZ-100EQ) that Alpine supply at extra cost. It conatins the software and microphone and talks directly to the 9887R. Essentially it's a 500 band parametric EQ and time alignment system. More info here http://www.alpine-europe.com/fileadmin/PDF...nal_eglisch.pdf and here http://www.alpine-europe.com/imprint/
For other Alpine HUs (including your 9855) this is a really good site where you can set up everything on screen to see how things look. https://i-personalize.alpine.com/nam/ you can set everything up and then either burn your settings to a CD rom and download them direct to the HU, or you can email them to yourself and do it manually.
Much depends on how you want things to sound. I suspect that you like a lot of bass, given the capacitor and subwoofer arrangement you have. Getting the crossover and level of that right is probably the most crucial thing for your system. Again, the i-personalize software can help with this.
Setting the time correction (just measure how far away the speakers are and it'll give you the numbers - the data I've entered is correct for front left and right, and is right for my sub, yours may be a little different.
Here's the Parametric EQ - your 9855 only has a 5-band parametric EQ (it probably has a 7 band non-parametric EQ which is why you've been unable to change the width so far - refer to the manual
I've had a quick look at the i-personalize website before. To be fair I didn't pay much attention to the EQ stuff as I found it needed time and effort.
Thanks for explaining the graph and the settings, it makes sense now.
I need to get the manual out and have a play with the Parametric settings, as you say. I will try over the next couple of weekends and let you know how I get on.
I do like a fair bit of base. Not to much, but enough to give the sound some depth. The capacitor and large amp is from my previous car. I thought I might aswell use the cap, as I know the S's battery in not the biggest.
I think you are also correct about the 5 band / 7 band option. I was having difficulty selecting the last setting, so this would also make sense.
I'm glad it has only 5 bands, it means I can relate to yours more.
No problem, happy to help. It's always a bit of trial and error anyway until you find somethnig you like. The Imprint is great, as it removes all that.
Have a play with the crossover settings in the i-personalize as well. Removing the low frequencies from the components and letting the sub take care of those will help.
I'd only bother setting the crossover for the components, and use the settings on the sub amp for the low-pass filter for that, as it'll probably be better than the one on the HU.
Your sub will be a bit further away as it's in the tool well, mine is measured to the side of the boot. You'll need the sub measurement to get everything correct.
