![]() you can drown it out by having the radio on. > fronts into the hertz component 163L setup (crossovers and 3 ways as you have done)īut with the amp powered up, and even with RCAs disconnected I get a small whining (key in position 1 so no engine malarkly running). > rears off to 6x9s I fitted in the cubby holes (all stealthly hidden of course) not sure how that will work with the NAV unit, but I'm gonna wire up a line out to it and run an RCA directly to the EQ which will split it into FR/FL + RR/RL + SUB and then drive my amps from there.ĭid you ever solve the interference problem? On my Z4M (with t**t-nav) I've taken my speaker feeds (from the footwell & from the rear just where the wires go to the rear speakers - not from the head unit) The rear mids being the same as the front mid have no resister that I could see this is why I have completely done away with the stock loom, coz there's something not quite right about it.Īnother thing I have noticed is that the head unit does feature a line out, it's just nothing is connected to it the business CD unit I had before actually gave you an option to switch it on. Taking this in to consideration, I believe all you'll need is a cleansweep type device to flatten the frequency range or an intermediate EQ (like the crude boss 7 channel eq I have) which you can tweak to then flatten the curve. it's rather crude when you think about it. The equilizer is definately altered dependant of volume, the amp would merely boost the lows accordingly dependant on volume. The amps in the hifi set up use the exact same high output as the standard system, this is the analogue DSP version it just them applies the crossover to each speaker and sends the signal out pretty basic and pretty much what an aftermarket amp would do, minus the crossover. When I mean crossover I mean exactly what you have mentioned in the second paragraph, the supposed crossover in the head unit will limit the frequency range of the rear mid, however when you tap into the rear channel at the head unit you don't have that problem. Did you notice when you changed yours (mids) if there was a capacitor soldered between the two terminal on the speaker itself? (I think that's how they used to create a crude high pass filter.)I think that the key test is going to be to plug some full range speakers - perhaps something from the house in to the front channel, then the rear (powered directly from the head unit) and see what difference in signal there is - if any. If the eq was set in the head unit to protect the basic speakers there would be an awful lot of correction to do to the signal in order to drive the subs of the Top HiFi. There must be some form of crossover or aggressive eq to stop them getting low frequencies which they couldn't handle. The thing that currently does not quite compute is the rear mids. I had the Harman Kardon in my e46 coupe and I was never aware of needing to fiddle with the bass and treble as I increased the volume and I imagine we are looking at a similar set up here. I think there is then another circuit in the posh amps (either a fixed one or a fancy variable one with the DSP option) that effectively corrects this - or perhaps simply boosts the bass. I'm feeling pretty certain that the eq is programmed in the head unit to protect the factory speakers so that as the volume increases the mid and top (relatively) increases relative to the bass signal. This is just making sure that each speaker gets a range of frequencies appropriate to its type. 10 of them as opposed to the 6 on the un-amped version). Those crossovers would be for each individual speaker (i.e. When you refer to crossovers in the amps I think your talking about something else. Otherwise there would have been loads of different upgrade codes and options with restrictions on what can go with what. I can't say with any surity but it seems likely that the head units would be the same regardless of the amp/speaker upgrade options.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |