GZCS 100BMW - Loudspeaker Ground Zero - Free user manual and instructions

Product Type	Car-specific 2-way component speaker system
Brand	Ground Zero
Model	GZCS 100BMW
Woofer Size	4 inches (10 cm)
Woofer Cone Material	Paper-fibre with rubber surround
Woofer Voice Coil	1.02-inch copper voice coil with BIMAX® spider
Tweeter Type	1-inch titanium dome tweeter
Power Handling (RMS)	50 Watts
Power Handling (MAX)	100 Watts
Sensitivity	87 dB
Impedance	3 Ohms
Frequency Response	100 Hz – 25 kHz
Recommended High Pass Filter	150 Hz, 12 dB/octave
Installation	Direct replacement of OEM speakers; no modification required
Included Accessories	Tweeter level adapter (for balanced audio with factory equalization)
Required Tools	Screwdriver TX20/TX25, slotted screwdriver 5mm, plastic wedge
Country of Origin	Germany
Warranty	Covered by local distribution partners; contact retailer for details

Frequently Asked Questions - GZCS 100BMW Ground Zero

What are the power handling specifications of the GZCS 100BMW?

The GZCS 100BMW has a RMS power handling of 50 Watts and a maximum power handling of 100 Watts. It is recommended to use an amplifier delivering 40-100 Watts per channel with a high pass filter at 150 Hz.

What is the impedance of these speakers?

The impedance is 3 Ohms, which allows direct connection to most factory systems but for best performance, use a separate amplifier.

Can I install these speakers in any car?

The GZCS 100BMW is a car-specific component system designed for BMW models (as indicated by the model name). However, it can be used in other vehicles with appropriate adapters.

How should I set the high pass filter?

Ground Zero recommends a high pass filter at 150 Hz with a slope of 12 dB/octave for optimal performance.

What tools are needed for installation?

You will need a TX20/TX25 screwdriver, a 5mm slotted screwdriver, and a plastic wedge to remove panels without damage.

What is the purpose of the tweeter level adapter?

The tweeter level adapter is used to reduce the tweeter output when factory equalization causes an unbalanced sound. It plugs in series with the tweeter wire.

What is the frequency response of the GZCS 100BMW?

The frequency response is 100 Hz – 25 kHz, covering bass to high frequencies.

Is a separate amplifier necessary?

Not necessary, but recommended for best performance. The speakers can work with original wiring, but an amplifier (40-100W/ch) is suggested.

What materials are the speaker components made of?

The midwoofer has a paper-fibre cone with rubber surround and a 1.02-inch copper voice coil. The tweeter has a 1-inch titanium dome.

Where is the product manufactured?

The GZCS 100BMW is Made in Germany by Ground Zero GmbH.

USER MANUAL GZCS 100BMW Ground Zero

The GZCS 100BMW speakers can be connected and used directly with the original wiring. For best performance however, it's recommended to install a separate amplifier. Recommended operation of the GZCS 100BMW speakers:

• 40 to 100 Watt / channel
• High pass filter at 150 Hz with a slope of 12 dB/Oct

Hochtonpegel-Adapter / Tweeter level adapter

Due to the equalization of the factory's electronic in some cars, it might be necessary to reduce the tweeter level to achieve a balanced audio reproduction. In this case, the enclosed tweeter adapter should be plugged in series into the tweeter's wire connection as to be seen on the picture.

Diagram showing a car head connected to a speaker, with blue square indicators indicating signal flow (no text or symbols)

The limited warranty for this product is covered by Ground Zero's local distribution partners and their terms and conditions. For further information contact your local retailer or distributor.

Ground Zero GmbH

Erlenweg 25, 85658 Egmating, Germany

Tel. [phone]

Fax -8310

www.ground-zero-audio.com

CAR SPECIFIC

Component Speaker

o Car specific 2 way component system "Made in Germany"

- 4" Midwoofer with paper-fibre cone and rubber surround

- 1.02" copper voice coil / BIMAX® spider

o 1" titanium dome tweeter

- Power handling: 50 W RMS / 100 W MAX

o SPL: 87 dB / Impedance: 3 Ohm / frequency range 100 Hz – 25 kHz

- Recommended high pass filter at 150 Hz with a slope of 12 dB/Oct

The OEM speakers can be replaced easily with the GZCS 100BMW speakers without any further modification.

Following tools are required depending on the car model:

• Screwdriver TX20 / TX25
• Slotted screwdriver 5mm / 0.2''
• Plastic (Teflon) wedge