MTX Audio 421D owner manual For Warranty Inquiries, please call

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POWER AMPLIFIER OWNER’S MANUAL

NOTES

Warranty

All MTX Audio Thunder Amplifiers purchased in the United States from an authorized MTX dealer are guaranteed against defects in material and workmanship for a period of three years from the date purchased by the end user if the product is installed by an authorized MTX dealer, and one year if installed by the consumer. This warranty is limited to the original retail purchaser of the product.

Product found to be defective during that period will be repaired or replaced by MTX at no charge. This warranty is void if it is determined that unauthorized parties have attempted repairs or alterations of any nature. Warranty does not extend to cosmetics or finish. Before presuming a defect is present in the prod- uct, be certain that all related equipment and wiring is functioning properly. MTX disclaims any liability for other incurred damages resulting from product defects. Any expenses incurred in the removal and reinstal- lation of products are not covered by this warranty. MTX's total liability will not exceed the purchase price of the product. If a defect is present, your authorized MTX dealer may be able to effect repairs.

Proof of purchase is required when requesting service, so please retain your sales receipt. and take a moment to register your warranty on-line @ www.mtx.com.

For Warranty Inquiries, please call:

800-CALL MTX

602-438-4545

MTX Audio

4545 E. Baseline Rd.

Phoenix, Arizona 85042

Register Warranty On-line:

mtx.com

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Contents Power Introduction Features SpecificationsTypical Speaker Wiring Configurations InstallationAdjusting the Gain Troubleshooting GuideInput Panel Layout Grey / Black = Source units right negativeSolid Grey = Source units right positive + Output Panel Layout Ohms bridgedIntroducción Caractéristiques FelicitationsComment Utiliser CE Manuel Guide de dépannage Réglage du volumeHaut-parleur standard Branchements ’ampli est désormais étalonné par rapport à la sourceAgencement du panneau d’entrée Gris/Noir = Unités de source négatif droitGris solide = Unités de source positif droit Branchements sur connecteur de sortie Introducción Características CongratulacionesComo Usar Este Manual Descuidos comunes Guía para la solución de problemasInstalación Monte transitoriamente el amplificador ThunderDiagrama del panel de entrada Gris / Negro = Derecha negativa de la unidadGris Sólido = Derecha positiva + de la unidad Diagrama de la placa de salida Ohmios puenteadasEinführung Technische Information WIR GratulierenZUR Verwendung Dieses HAND- Buchs Allgemeine Installationshinweise FehlersucheTrennen Sie das Minuskabel der Fahrzeugbatterie Eingangskonsolen-Layout Grau/schwarz = Quellgeräte rechts negativDunkelgrau = Quellgeräte rechts positiv + Ausgangskarte Abbildung Warranty For Warranty Inquiries, please call