GZUM 80SQ - Loudspeaker Ground Zero - Free user manual and instructions

Brand	Ground Zero
Model	GZUM 80SQ
Series	URANIUM Series
Product Type	80 mm / 3.15" SQ Midrange Speaker
Impedance (Nominal)	3 ohms
Frequency Response	200 Hz – 6 kHz
Power Handling (RMS)	50 Watts (250 Hz HPF @ 12dB/oct)
Power Handling (Max)	80 Watts (250 Hz HPF @ 12dB/oct)
Sensitivity (SPL)	90 dB
Voice Coil Diameter	25 mm / 1" copper
Cone Material	Black anodized aluminum
Basket Material	Fiber reinforced plastic (GZ-design)
Motor Type	High-efficient, linearized neodymium magnet
Surround Material	Durable rubber
Connectors	Gold plated
Protection Grill	GZ-design hexagon protection grill
Outer Diameter (A)	94 mm / 3.7"
Mounting Diameter (B)	76.5 mm / 3.01"
Mounting Depth (C)	35 mm / 1.38"
Resonance Frequency (Fs)	134 Hz
Qms	4.26
Qes	0.37
Qts	0.34
Vas	0.71 L
Mms	3.7 g
Bl Factor	4.9 N/A
Xmax (peak to peak)	8 mm / 0.31"
Warranty	Limited warranty through regional distributors

Frequently Asked Questions - GZUM 80SQ Ground Zero

What is the recommended crossover frequency for the GZUM 80SQ?

The speaker is designed for midrange frequencies. A high-pass filter at 250 Hz (12dB/oct) is recommended for power handling specifications. For optimal performance, consult a car audio specialist.

Can I use the GZUM 80SQ as a full-range speaker?

It is primarily a midrange speaker, but it can be used as a full-range in some setups. However, its frequency response is 200 Hz to 6 kHz, so it lacks deep bass and high treble. For best results, use it in a multi-way system with a subwoofer and tweeter.

What amplifier power is suitable for this speaker?

The speaker handles 50 Watts RMS and 80 Watts max with a 250 Hz high-pass filter. An amplifier delivering 50-80 Watts per channel into 3 ohms is appropriate. Ensure the amplifier is stable at 3 ohms.

What is the impedance of the GZUM 80SQ and can I use it with a 4-ohm amplifier?

The nominal impedance is 3 ohms. Most 4-ohm rated amplifiers will deliver higher power at 3 ohms, but check the amplifier's specifications to ensure it can handle 3 ohm loads without overheating.

How do I wire the GZUM 80SQ in a 3-way system?

The manual shows two wiring methods: using an amplifier with integrated active crossover/DSP, or using a passive crossover (GZUX 165.3SQ, not included). Connect the midrange output to the speaker, ensuring correct polarity. Refer to the manual diagram for details.

Is the GZUM 80SQ Klippel verified?

Yes, GROUND ZERO uses the KLIPPEL® R&D Analyzer KA3 for development and QC. The speaker is Klippel optimized to ensure linear performance and low distortion.

What is the mounting depth of this speaker?

The mounting depth is 35 mm (1.38 inches). Ensure your installation space accommodates this depth plus clearance for the magnet and wiring.

How should I clean the GZUM 80SQ?

Use a soft, dry cloth to gently wipe the cone and surround. Avoid liquids or harsh chemicals, as they may damage the anodized aluminum cone or rubber surround. Do not use compressed air near the voice coil.

What is the warranty coverage for this speaker?

The limited warranty is provided by GROUND ZERO's regional distribution partners. Terms vary by region. Contact your local retailer or distributor for specific warranty details.

Is the GZUM 80SQ suitable for marine or outdoor use?

No, this speaker is designed for car audio interior use. It is not weatherproof or water-resistant. Exposure to moisture or extreme temperatures may cause damage.

USER MANUAL GZUM 80SQ Ground Zero

3D rendering of a speaker component with labeled dimensions A, B, and C (no text or symbols beyond labels)

Technische Daten

Verified with KLIPPEL®

GROUND ZERO is using the worldwide accepted KLIPPEL® R&D Analyzer KA3 measurement system for speaker development during the German in-house development as well as for QC reporting for most production lines at the factory. The results of LPM and LSI measurements are the basis for evaluating and verifying further development enabling to offer perfectly working products in any practical application. Continuous and advanced trainings for development employees ensure the highest possible qualification.

KLIPPEL ^® is a registered trademark of KLIPPEL GmbH

Verkabelung 3-Wege Setup

Thank you for choosing a GROUND ZERO product and welcome to your new URANIUM series loudspeaker! This is the owner's manual providing instructions on the operation and installation of this SQ midrange loudspeaker. Please, read it carefully. If you have any further questions, please contact your local GROUND ZERO dealer or our regional distribution partner. The midrange loudspeaker is one of the most important parts of your car audio system. However, it will only be able to deliver its full performance when each part of the whole system is tuned carefully matching each other. Therefore, we recommend consulting a car audio specialist to compile the desired sound system, as well as for installation and tuning. We hope you will enjoy the sound quality of an enthusiastic development by the GROUND ZERO engineering team!

URANIUM Series – Amazing Sound Quality

Products belonging to the GROUND ZERO URANIUM series stand for high-end sound quality

Each product of the URANIUM line-up has been developed carefully to fulfill the demands of music enthusiasts with high audiophile expectations at a reasonable price level. Applying all of GROUND ZERO's sound quality competition experience while tuning the product details carefully, results in emotional and amazing audio reproduction. The distinguished amplifiers point out the main purpose by their designation: SQ beyond the average!

Terms of Warranty

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

General installation note

• Never drill a hole to the vehicle's gas tank or brake lines, to wirings or any other important vehicle parts!
• Never pass wires over sharp edges or vehicle parts due to avoid any kind of damage
• Keep the wiring away from the antenna and electronic devices contributing to radio reception
• Lay the power supply wiring always separated from speaker wiring to avoid disturbance

URANIUM SERIES

Midrange Loudspeaker

GZUM 80SQ

Main Features

• SQ midrange / full range loudspeaker
- Klippel optimized
- Black anodized aluminum cone
• GZ-design fiber reinforced basket
• High-efficient, linearized neodymium motor
• Durable rubber surround
• Gold plated connectors
• GZ-design hexagon protection grill

Dimensions

Dimensions

Outer diameter (A)Mounting diameter (B)Mounting depth (C)

94 mm / 3.7"76.5 mm / 3.01"35 mm / 1.38"

3D rendering of a speaker component with labeled dimensions A, B, and C (no text or symbols beyond labels)

Specifications

Model	GZUM 80SQ
Speaker type	80 mm / 3.15" SQ midrange speaker
Impedance (nominal)	3 ohms
Frequency response	200 Hz – 6 kHz
Basket	Fiber reinforced plastic
Cone	Anodized aluminum
Motor	Neodymium magnet
Voice coil	25 mm / 1" copper
Power handling (RMS)	50 Watts(250 Hz HPF @ 12dB/oct.)
Power handling (max.)	80 Watts(250 Hz HPF @ 12dB/oct.)

Technical Parameters (TSP)

Resonance frequency	134 Hz
Efficiency (SPL)	90 dB
Re	2.8 ohms
Qms	4.26
Qes	0.37
Qls	0.34
Vas	0.71 L
Mms	3.7 g
BL	4.9 N/A
Rms	0.73 kg/s
Cms	0.381 mm/N
LE	0.033 mH
Xmax (excursion)	8 mm / 0.31" (p2p)

Verified with KLIPPEL®

GROUND ZERO is using the worldwide accepted KLIPPEL® R&D Analyzer KA3 measurement system for speaker development during the German in-house development as well as for QC reporting for most production lines at the factory. The results of LPM and LSI measurements are the basis for evaluating and verifying further development enabling to offer perfectly working products in any practical application. Continuous and advanced trainings for development employees ensure the highest possible qualification.

KLIPPEL® is a registered trademark of KLIPPEL GmbH

3-way setup wiring

Amplifiers with integrated active crossover or with DSP

GZUK 165SQ

Wiring with passive crossover*

Respect the Music

Listening to music can be emotional, impressive, relaxing or enjoyable. At that, it doesn't really matter what kind of music is the personal favorite, whether it's Instrumental, Jazz, Electro, Latin, Classic, Rock or any other music direction. However, audio reproduction quality at each desired volume is elementary. Some music styles require higher levels while others prefer the soft tones. GROUND ZERO considers all the different wishes of customers during the development of new products. Along with this, the target is to create the most realistic sound, to transfer the soul of the music and the intention of the performer. Summarized to one phrase: RESPECT THE MUSIC!

Sicherheitshinweise / Safety instructions

Safety instructions: Keep all parts of the content and the packaging away from children and pets to avoid accidents and the risk of suffocation. Permanently extreme levels of over 85 dB can lead to irreparable damage to the hearing. Music systems with high amplifier output power can reach levels of 130 dB or more. Extreme levels can also hinder the perception of important traffic noises and distract from what is happening on the road. Ground Zero GmbH and its sales partners expressly assume no responsibility for hearing damage, physical damage or any damage to property or consequential damage resulting from improper or careless use or improper installation of its products. In particular, any claims are forfeited through the use under competitive conditions.

Manufacturer's declaration: Hereby, Ground Zero GmbH declares that this product conforms to the rules of the following EU directives (including all applicable changes): 2011/65 / EU RoHS2 and 2001/95 / EC directive on general product safety.

The full text of the EU declaration of conformity is available at www.ground-zero-audio.com. Loudspeakers contain magnetized metals and some valuable raw materials and must not be disposed of with normal household waste. Please leave defective or no longer required components to a local recycling facility at the end of their practical use.

GROUND ZERO products are engineered in Germany

GROUND ZERO - international sponsor of

Ground Zero GmbH

Erlenweg 25, 85658 Egmating, Germany

Tel. [phone] Fax -8310

www.ground-zero-audio.com