1998 740il

45

Asked by Apr 03, 2009 at 05:10 PM about the 1998 BMW 7 Series

Question type: Car Customization

I have a 1998 740il, i know this car has lots of speaker for quality sound but it has no base what so ever, what are some directions i could go in terms of a sub system?

4 Answers

385

Look into "underseat" woofers. They're really popular in pick up trucks because of the limited space in the cab. Plus youdon't have a huge, ugly box in the trunk and you can't even tell they're there.

1 out of 1 people think this is helpful.
45

I have heard that if you change out, or add any components to a bmw electronically it messes up the whole car? I dont know how true that is, do you know anything about that?

2 out of 2 people think this is helpful.
415

This sounds like a problem with the amplifier or the connection to the sub. Now, depending on whether or not the car has the harmon/kardon sound system would determine whether or not there is already an under-seat sub in which case you can just replace it. If it is not a premium sound system you are either looking at replacing the system amp. or all the connections to the low-range speakers...

15

I am doing a refit on a E38 740I Sport and removing the radio-cassette- GPS combo which is crap to begin with and using a kit already fitted for the space left, keep in mind no more wood is left. It’s all removed and a large unit is used to fill the slot. Now you have a great platform for a much better audio unit, Speakers, all of them replaced and the rear deck and huge truck space is superb for the additional speakers and a subwoofer with a box attacked with the reproduction cone in the cabin not blasting the truck space rattling the licence plate not to mention the entire car as you drive buy sounding like a real ghetto blaster, I prefer true audio harmonics which you are unable to do with a muffled trunk subwoofer you lose the true lows which is the bass you wanted in the first place. All the amps and amp watt balancers are placed in the trunk mounted on the side the CD changer and disc GPS unit were placed buy the factory and the amp for the sub is on the right side, three amps total, 500 watts 4 ohms on subwoofer is sufficient and sounds better, all the amps are at or greater then 1000 watts rated for 2 ohms, 4 ohms cuts the wattage in half, as 8 ohms would only provide 250 watts but if you want it load it will distort and 4 ohms won’t. As for the roomer of screwing up the electronics buy doing this is false, unless you just cut whatever wires and improperly rewire the new audio unit. The easiest way would have been to pick a year where a large unit was already used omitting any wood trim but the price was too good to pass up on a triple black E38 Sport with relatively low miles and not beat up for a few thousand dollars like a if it was a 200 thousand mile 740IA rag doll. True Sport models were not cheap and clean low mile one’s are still not cheap, as good and even better then any E39 540 or M5 auto. Euro models have a manual as well as a 750I sport manual that is still expensive and hard to find. Anyways I have a manual 2000 which is a 2001 here and wanted to use the US version to spec out the car then let my cousin have the auto manual US version afterwards. My last build was a Euro 500SL brought into the US and I returned it to Europe but smoking hot, average cruising speed 185mph top speed was 220 and scary, it was on the very edge but at 200mph quite fine but loved it at 185mph. Now the suspension was a custom fab race track spec as were the brakes, stock it would have been crumpled metal and I would be not here writing this now. Idiots with smart cars would swing over to the passing lane where there are no speed limits in Germany and stopping a car at 185 mph hard would kill stock components and leave you with no brakes after three hard braking, overheated and useless. I have had several BMWs even a prior E38 750IL which was just too long and even thou the 12 was great power stock, the rest was meant for easy driving and better to be seated in back with a driver hauling you around like some diplomat. I will provide the specs after I have finished, also pictures on the process of removing the Audio unit and replacing it. The pictures are the taken the day I first saw the car on a lot.

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

  • I have a 1998 740IL 1 answer

    I have a 1998 740IL with a AC Schnitzer full body kit. I would like to add the a Remus exhaust to my car and I have knowledge that a particular exhaust is made by Remus that will fit my vehicle. My co...

    1998 BMW 7 Series

    -

    Car Customization

  • Its there a reset button on a bmw 98 740il 2 answers

    1998 BMW 7 Series 740iL

    -

    General

  • Anyone no where the fuse are at in a 98 BMW 740il 2 answers

    Brake lights stopped working but all other lights work. Any ideas. My 3rd brake light work

    1998 BMW 7 Series 740iL

    -

    Maintenance & Repair

  • My 7 series just woudnt start, if it starts it shuts down in less than 30 sec 10 answers

    I have maintained my 740IL it is only 95K miles, my mechanic was fixing the coolant leak and after that the car would not start. If it starts it shuts down in under 30 sec. Does anyone know the issue?

    1998 BMW 7 Series 740iL

    -

    Maintenance & Repair

  • What is the widest tire you can put on a 325i? 12 answers

    I have 6.5 inch by 14 inch diameter rims and I'm thinking of 7.5 or 8 inch by 15 inch diameter rims. Will it make a difference on the tire width? I'm currently running 195/65/14 tires. Would 205/50...

    1989 BMW 3 Series 325i

    -

    Car Customization

7 Series

Looking for a Used 7 Series in your area?

CarGurus has 5,870 nationwide 7 Series listings starting at $1,600.

ZIP:

Search BMW 7 Series Questions

BMW 7 Series Experts

#1 lweems
lweems
Reputation 1,490
#2 Vince Lee
Vince Lee
Reputation 490
#3 Tom Demyan
Tom Demyan
Reputation 470
View All

Related Models For Sale

Used Mercedes-Benz S-Class
184 Great Deals out of 6,065 listings starting at $2,250
Used BMW 5 Series
663 Great Deals out of 17,694 listings starting at $1,500
Used Audi A8
36 Great Deals out of 1,804 listings starting at $2,500
Used Mercedes-Benz E-Class
779 Great Deals out of 22,927 listings starting at $1,600
Used BMW 3 Series
1,801 Great Deals out of 40,973 listings starting at $1,250
Used Land Rover Range Rover
120 Great Deals out of 4,930 listings starting at $4,500
Used Jaguar XJ-Series
72 Great Deals out of 2,432 listings starting at $2,495
Used Cadillac Escalade
385 Great Deals out of 10,994 listings starting at $2,995
Used BMW M5
35 Great Deals out of 631 listings starting at $7,990

Used Cars For Sale

2017 BMW 7 Series For Sale
1,556 listings starting at $76,750
2016 BMW 7 Series For Sale
16 Great Deals out of 650 listings starting at $63,499
2015 BMW 7 Series For Sale
3 Great Deals out of 188 listings starting at $33,999
2014 BMW 7 Series For Sale
15 Great Deals out of 437 listings starting at $28,985
2013 BMW 7 Series For Sale
34 Great Deals out of 630 listings starting at $22,988