E82 1-series coupe with Stereo


The BMW “Stereo” sound system



The Stereo system has six speakers, no amplifier, and a heavily-processed “deck-power” signal coming out of the head unit. The tweeters are missing. The underseat 8″ speaker provisions have 6″ speakers hot-glued into them. It’s not even “mid-fi”, it’s so bad – but great results are possible. A systems approach is required.
Musicar Certified sound systems upgrade the most important speakers, as well as the amplification. The stock head unit is retained and all functions work just as before. All the new gear is plug-in and bolt-on. The output signal processing is corrected.



Musicar Certified Sound systems for E82 1-Series coupe with Stereo



More details on Musicar Certified Sound systems (under construction)

Level One
SpecificationsWhat Is IncludedSystem DiagramsProduct Photos

Amplifier

Channels: 4 (2 front and 2 underseat)

Total harmonic distortion:0.05%

Signal/noise ratio (1W): greater than 90dB

Damping factor @100 Hz w/25W: greater than 800

WPC @14.4VDC: 75

WPC @ 2 ohms @ 14.4VDC: 125

Dynamic Headroom per IHF definition: 125WPC

Input impedance: 47.5 kOhms

Idle current: 1.014A

Crossovers: Second-order high-pass and low-pass

Cooling: Heat-sink conveticon and forced-air


Front Components

Pe: 60W

Peak Pe: 80W

Sensitivity 1W/1M: 90dB

Impedance: 4 Ohm

Crossover: Second-order HP

Cone material: Pulped paper

Dome material: Silk

Dome diameter: 20mm

Frame material: Powder-coated stamped steel

Tweeter protection: Thermal (PTC)

Midrange magnet: Strontium alloy

Tweeter magnet: Neodymium alloy


Underseat Woofers

Pe: 80W

Peak Pe: 120W

Impedance: 4 Ohm

Cone material: Paper

Magnet material: Neodymium alloy


DSP Correcting processor

Inputs: Four balanced-differential

DSP resolution: 24 bit

DSP EQ: 1/3-octave resolution, 30 bands per channel

Output voltage: 8V

Signal/noise: 104dB A-weighted

Total harmonic distortion: 0.01%

Level Two
SpecificationsWhat Is IncludedSystem DiagramsProduct Photos

Amplifier

Channels: 4 (2 front and 2 underseat)

Total harmonic distortion:0.05%

Signal/noise ratio (1W): greater than 90dB

Damping factor @100 Hz w/25W: greater than 800

WPC @14.4VDC: 75

WPC @ 2 ohms @ 14.4VDC: 125

Dynamic Headroom per IHF definition: 125WPC

Input impedance: 47.5 kOhms

Idle current: 1.014A

Crossovers: Second-order high-pass and low-pass

Cooling: Heat-sink convection and forced-air


Front Components

Pe: 100W

Peak Pe: 300W

Sensitivity 1W/1M: 88dB

Impedance: 4 Ohm

Crossover: Second-order two-way with tweeter attenuation

Cone material: Composite cellulose

Dome material: Silk

Dome diameter: 28mm

Frame material: stamped steel

Midrange magnet: Strontium alloy

Tweeter magnet: Neodymium alloy


Underseat Woofers

Pe: 130W

Peak Pe: 160W

Impedance: 4 Ohm

Cone material: Cellulose

Magnet material: Neodymium alloy


DSP Correcting processor

Inputs: Four balanced-differential

DSP resolution: 24 bit

DSP EQ: 1/3-octave resolution, 30 bands per channel

Output voltage: 8V

Signal/noise: 104dB A-weighted

Total harmonic distortion: 0.01%

Level Three
SpecificationsWhat Is IncludedSystem DiagramsProduct Photos
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m performance
SpecificationsWhat Is IncludedSystem DiagramsProduct Photos
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