ICE

Wiring

 * http://www.vwt4forum.co.uk/showthread.php?t=214560
 * I would run it up to the roof cavity and then down the near side A pillar and through the grommet by the battery. Don't cut the grommet, remove the tape from the neck and then spray some WD40 inside to lubricate and pass cable through. Re tape neck when finished.
 * http://www.vwt4forum.co.uk/showthread.php?t=184277
 * There are two body ground points in the rear behind the lower panels, one beneath the drivers seat. But any chassis point thats not painted will be fine.
 * http://www.vwt4forum.co.uk/showthread.php?t=198828
 * ...there is also a VW threaded earth point up underneath the passenger footwell on the left hand side, just beneath the upper reaches of the floor mat

DLS

 * CA 20
 * HPF 15-500Hz
 * LPF 50-500Hz
 * CA 40
 * A/B HPF 15-500Hz LPF 50-500Hz or 500-5K
 * C/D HPF 15-500Hz or 150-5K LPF 50-500Hz

Tools

 * http://audacity.sourceforge.net/about/features
 * Spectrogram view modes for visualizing frequencies.
 * "Plot Spectrum" command for detailed frequency analysis.
 * http://www.katsurashareware.com/pgs/audiotest.html
 * http://en.wikipedia.org/wiki/Brown_noise
 * PlayNoise, a free online white, pink, and brown noise generator, uses Javascript/HTML5.
 * Simply Noise, a free online white, pink, and brown noise generator that supports timer and volume oscillation functions.

Ground Loop

 * http://www.termpro.com/asp/pubs.asp?ID=121
 * "Ground loops are created whenever an audio ground is established at more than one location. Theoretically, the only place the audio ground should be connected to the chassis ground is at the source unit."
 * "Don't connect all of your amplifier ground wires under one bolt."

Dash Speakers

 * http://www.vwt4forum.co.uk/showthread.php?t=172978&highlight=speakers
 * "Now i'm running the 6.5's with the tweeters surface mounted on the dashboard and have re installed the 4" Kappa's without the tweeters connected and you can hear every note crystal clear"
 * "I just fitted some Infinity Reference 4032cf into the front and 9633i into the rear roof speaker pod of a friends van and from the moment I tested them, I had speaker envy. I have Alpines in the same positions in my van and the Infinity just seemed so much clearer with more in-built bass than my set up."
 * http://uk.infinitysystems.com/infinity-products-uk/brand_infinity/car_audio.html
 * http://jblcaraudio.co.uk/infinity-reference-4032cf-10cm-speakers
 * http://audiovisualworld.co.uk/shopping/infinity-reference-4032cf-4-10cm-2-way-coaxial-car-speakers-105watt.html
 * £29.99
 * http://www.sonicelectronix.com/item_61825_Infinity-REF-4002cfx.html
 * product history
 * http://www.caraudiodirect.co.uk/speakers-full-range-4-inch-coax-%2810cm%29/
 * http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_categoryId_265870_productId_768655_langId_-1?cm_mmc=Shopping-_-Google%20Product%20Search-_-In-Car%20Technology%2FCar%20Sound%20Systems%2FCar%20Speakers-_-Focal%20Access%20CA1%20100mm%204%22%20Car%20Speakers&source=shopping
 * mounting diameter 85-94mm?
 * http://www.focal.com/en/car-audio-sound/haut-parleurs/kits-2-voies-se-pare-es/100-krs.php
 * http://www.dvbcaraudio.co.uk/focal-100vrs-2way-polyglass-shallow-component-free-delivery-p-8266.html
 * £184.49
 * http://www.caraudioclearance.co.uk/focal-100krs-10cm-2way-component-car-speakers-kit-100w-p-407.html?utm_campaign=GOOGLE%20BASE&amp;utm_source=Google%20Base
 * 187.99
 * http://www.vwt4forum.co.uk/showthread.php?p=1604002
 * "infinty speakers in my dash, however because of the tweeter the original grills wouldnt fit properly" so...
 * http://www.vwt4forum.co.uk/showthread.php?t=183374
 * infinity reference 4032cf - "with a bit of a wiggle i have managed to get orig grilles back on without any trimming"
 * http://www.vwt4forum.co.uk/showthread.php?t=57400&page=3
 * "Component tweeter in the dash" (where coaxial would be)
 * http://www.vwt4forum.co.uk/showthread.php?t=1051&page=6
 * Focal Access 165 A1s and put the tweeters on top of the door
 * http://www.vwt4forum.co.uk/showthread.php?t=72008&page=4
 * tweeter in door windowsill
 * http://www.vwt4forum.co.uk/showthread.php?t=95693
 * tweeter in door windowsill
 * http://www.vwt4forum.co.uk/showthread.php?t=18348
 * I used heavy density speaker foam to pad out the area behind the dash speakers - makes a big difference.
 * http://forums.vwvortex.com/showthread.php?4921389-3.5-quot-dash-speaker-options...what-are-YOU-rocking-in-your-mk2
 * "im rocking mb quarts up front 5.25 in the doors then i placed the tweeter where the stock 3.5 went in the dash"