Premium Sound upgrade kit feeler

[The White Guy]

89 sedan with stock speakers, and aftermarket JVC head unit.

So to get good sound, I need to get 4 e34 passenger side front mid bass and 4 of the parts express tweeters, 2 pair of your crossovers and the premium speaker housings for the sail panel and the rear housings?

Am I missing anything? Where do you mount the rear local pcn's for a clean but hidden setup?

You need a 5 channel amplifier, GAS E3010 "Lukebox" sub enclosure, 10" woofer for the enclosure and also rear premium speaker housings are needed to house the extra rear tweeters.
I mounted my PCNs on the rear parcel shelf as shown in picture...Plenty of room.
Thanks, Stan

http://www.germanaudiospecialties.com/store/p85/E30_Single_10%22_Enclosure.html

[Rev Run D]

89 sedan with stock speakers, and aftermarket JVC head unit.

So to get good sound, I need to get 4 e34 passenger side front mid bass and 4 of the parts express tweeters, 2 pair of your crossovers and the premium speaker housings for the sail panel and the rear housings?

Am I missing anything? Where do you mount the rear local pcn's for a clean but hidden setup?

[StereoInstaller1]

Two things here: the most important part of using a high pass filter before the amplifier is the reduction in IM (intermodulation) distortion and the roughly 400% increase in dynamic headroom.

The speaker is just a flappy thing, people get all worked up but in reality, they just aren't that damn important. What matters is the crossovers, both active and passive. Proper filtration and level matching is what makes for great sound, first and formost.

[Cephas]

Not really, "if" the crossovers work the way I think they split off the highs to the tweet and everything lower to the mid. So setting your amp to high pass mode would kill the lows and send everything above to the crossover where it does its magic...

Am I right Luke/someone else that knows?

Looking at this and thinking it through...it would seem to me that the tweeter is crossed over at 6khz and lower. Meaning 6khz and above is passed through to it since it cannot play notes lower than that.

That would mean that the mid-woofer gets notes that are 4k and higher...unless the mid-woofer is crossed over inversely, meaning only 4k and lower is passed through to it.

I don't know for sure, but the nerd in me wants to know.


Edit:
For anyone who wants to know more than they ever thought about crossovers:

http://www.audioholics.com/loudspeaker-design/crossover

In short, the high pass network uses capacitors and inductors to cancel out the low frequencies while the low pass network uses them (in this case only uses an inductor) to cancel out the highs. So the mid-woofer will get all frequencies passed through from 4khz and below. Looks like using the amps built in HP filter will still make sense to keep the subsonic levels from getting sent to the mid-woofer.

[DER E30]

But shouldn't the local crossovers filter it out so the speaker doesn't see those really low frequencies?

Not really, "if" the crossovers work the way I think they split off the highs to the tweet and everything lower to the mid. So setting your amp to high pass mode would kill the lows and send everything above to the crossover where it does its magic...

Am I right Luke/someone else that knows?

[Cephas]

You can, but without crossing them in HP mode you are sending a lot of bass to a set of midranges.

But shouldn't the local crossovers filter it out so the speaker doesn't see those really low frequencies?

[phenryiv1]

So stupid-ish question: If I am running an amp and the local crossovers, can I run my amp in full range instead of high pass?

You can, but without crossing them in HP mode you are sending a lot of bass to a set of midranges.

[Cephas]

So stupid-ish question: If I am running an amp and the local crossovers, can I run my amp in full range instead of high pass?

[StereoInstaller1]

Yes, exactly that. If you want the sexy, order the classic. If the you want performance only, get the LPCNs.

As crazy as it sounds, both are in stock at this moment!

[BMWManiac]

Ok, I'm running the $500 system already and want to replace my stock premium system. Does that mean I need 4 x tweeters, and 4 x e34 speakers, and the crossover?

[dubdub]

View from the other side is pretty! I finished installing the local crossovers with E34 speakers, and Dayton tweeters a few months ago. Clear, loud, clean... really happy. Mixed with the 10" box and amp rack, and this is easily the nicest sounding car audio system I have owned in 30 years of loud systems!

[Cephas]

No foam that I can recall. OEM E30 tweeter grille had only a thin cloth material under grille. Stan

Thanks for the help! I am slowly piecing this together. I simply removed that (completely dried up, nasty foam) and super glued them in there. I cannot wait to get these crossovers installed.

[The White Guy]

I take it that you don't have the foam in there then? I mocked mine up yesterday, and the dome definitely comes into contact with the foam on the grill.

If anyone knows of an easy way to space the tweeter out a few mm, that should fix the issue.

No foam that I can recall. OEM E30 tweeter grille had only a thin cloth material under grille. Stan

[Cephas]

That is what I did. Used RTV to attach it in, so if need be can be removed in the future.

Thanks,

Stan

I take it that you don't have the foam in there then? I mocked mine up yesterday, and the dome definitely comes into contact with the foam on the grill.

If anyone knows of an easy way to space the tweeter out a few mm, that should fix the issue.

[robrez]

Yessir, that makes more sense, LOL. And, of course, I agree completely. I just can't seem to find anything that is going to fit all 4 corners of the E30, handle adequate power and sound good. These E34 drivers just kick ass and are plentiful both new and used. The biggest part of the hassle is the recessed cone and suspension, because I want to be able to shove these under the stock Premium grilles front and rear.

The midbass driver I am referring to is in particular the right front E34 from 1993 to 1995. the part number is 6513 8370 935 and is plentiful...in Germany.

The left speaker is DVC and is exactly the same sound and shape, but has a useless second coil. If you are going to order them, get the non-DVC version. If you are scavenging, feel free to use both stock E34 front speakers, idealkly in all 4 corners.

NOTE: these bigger E34 speakers will not fit the rear of a vert, don't even try.

I was able to fit the e34 front speakers in the rear of my ver. It's a really tight fit because of the bigger magnets, but it fit.



As you can see the part no. is 6513 8735 081, which is a previous revision of 6513 8370 936, which is the opposite side of what Luke recommends, but still the same 4ohm 40w speaker.

See here:

Hi Luke,



Have you tested the Non-Handsfree version of the E34 speakers [P#65138370936]. There are plenty of these on online compared to the other P#....35.



They look very similar to each other but the 35's have a green sticker and 36 have a blue one.

Yes, I have. I cannot hear a difference and the impedance measurements seem almost exactly the same. I think that functionally, they are the exact same thing.