High Line ICE - front door speaker crossover

[twr7cx]

Anyone know where the crossover is for the frequencies for the front speakers on the High Line ICE setup? There are three speakers - tweeter in the A pillar, mid range in the upper of the door and woofer in the lower - so what stops the treble from going to the woofer and bass from going to the tweeter, and where is it located?

[northiam]

All speakers fed separately directly from under-seat amp according to rave

[twr7cx]

I might pull one of the door trims off tomorrow and see if there is a pass filter on the back of the speakers.

[twr7cx]

Removed the midrange speaker from the front door today and can confirm that there is nothing on the back of the speaker. It must be higher up the line or built into the amplifier.

[Bohica]

Removed the midrange speaker from the front door today and can confirm that there is nothing on the back of the speaker. It must be higher up the line or built into the amplifier.

Yes it is, see previous post copied and pasted below.

http://www.aulro.com/afvb/customavatars/avatar31152_3.gif (http://www.aulro.com/afvb/members/northiam.html)
northiam (http://www.aulro.com/afvb/members/northiam.html) https://www.aulro.com/afvb/images/imported/2016/09/1076.jpg
Master
Supporter

Join Date: Jul 2010
Location: Hunter Valley NSW
Posts: 622
Thanks: 64
Thanked 207 Times in 166 Posts


All speakers fed separately directly from under-seat amp according to rave

[northiam]

Yes it is, see previous post copied and pasted below.


He doesnt believe the rave diagram?

[twr7cx]

He doesnt believe the rave diagram?

I do believe the Rave diagrams, but I don't believe that the above responses are the correct interpretation of it.

If you look at Rave, Discovery 2, Electrical Circuit Diagram 2003 English, Audio Systems, High Line, page 137 of 162, you will note that each speaker is not fed directly from the amplifier according to the wiring diagram.
For the front doors, the 'SPEAKER-MID RANGE-FRONT DOOR..." and 'SPEAKER-HIGH RANGE A-POST..." are both few from a single amplifier channel.
The same is the case for the rear doors.
For the subwoofers and front door lower speaker, see pages 136 for amplifier output and 138 for the speakers.
The amp is therefore only eight channels, but there are 12 speakers. The other four speakers are the tweeters which piggyback off the mid range speakers output channel from the amplifier - therefore there must be some sort of a band pass filter in this line.

[northiam]

You asked about the front doors
The Lear amplifer which my high line ice setup is fed separately (rave page 50.9)
I must have assumed yours was Lear not HK
The Lear is 10 channel.
I believe my interpretation of circuit diagrams was correct...

[Bohica]

I've had a quick look at RAVE ICE Highline diagrams. 2003 model
pages 134 to 137. These number are bottom right or "50" top left (136) Like the OP, I do not see any crossover unit. It looks like the same feed from the amp DOES drive both "speaker mid range front door" and "speaker hi range A post". I guess that the mid or hi range have a small bit of electronics to filter out the unwanted frequencies. Or not. Sometimes the unwanted frequencies are just inefficient in the unwanted driver.
The low range front door has it's own feed from the amp.

Hopefully this clears things up.

[Bohica]

- therefore there must be some sort of a band pass filter in this line.

There does not have to be.

This could be a small discrete piece of electronics or this does not exist. I this scenario, the hi range driver would be very inefficient at the lower ranges and vice versa for the mid range.

[twr7cx]

Thought that I would pop a few details up on this, based on what I have found, as it may assist someone else in the future:

The front a-pillar tweeters seem to have some kind of band pass filter in line:

https://www.aulro.com/afvb/images/imported/2016/09/693.jpg (http://s1185.photobucket.com/user/twr7cx/media/IMG_7383_zpsxqrcl90x.jpg.html)

The front doors mid-range don't seem to have anything - having replaced these with two-way coaxial 4" speakers it certainly sounds like they are receiving the full range of sounds:

https://www.aulro.com/afvb/images/imported/2016/09/694.jpg (http://s1185.photobucket.com/user/twr7cx/media/IMG_7377_zps2akgxvcp.jpg.html)

The bottom door speakers for the front and rear doors are the same unit (same part number). They don't have anything on them unless it's inbuilt on that orange plug:

https://www.aulro.com/afvb/images/imported/2016/09/695.jpg (http://s1185.photobucket.com/user/twr7cx/media/IMG_7380_zpsitwuc5vl.jpg.html)

The rear door tweeters have a few extra bits in there housing - note the three pin plug connection too which makes me wonder if it filters the lower woofer too? For the rear doors, the tweeter and woofer are on the same amplifier channel:

https://www.aulro.com/afvb/images/imported/2016/09/696.jpg (http://s1185.photobucket.com/user/twr7cx/media/IMG_7379_zpsaqwmhtoc.jpg.html)

The sub woofers don't seem to have anything:

https://www.aulro.com/afvb/images/imported/2016/09/697.jpg (http://s1185.photobucket.com/user/twr7cx/media/IMG_7381_zpsrttx8qqb.jpg.html)


The amplifier has eight channels:
A single channel for each front door midrange and a-pillar tweeter.
A single channel for each front door woofer at the bottom.
A single channel for each rear door tweeter and woofer.
Two channels for the two subwoofers.

It would seem that perhaps four channels are low pass only and four are full range with the filters on the speakers as required.