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Фрагмент инструкции
High operating temperature can be caused by an incorrect input sensitivity level: refer to sub-section titled INPUT SENSITIVITY ADJUSTMENTS for correct setting. 6. "Motorboating": The Check the amplifier's connection to the battery. amplifier power indicator Check battery voltage. If low, recharge or replace going off repeatedly when battery. Check all ground connections. the audio system is on 7. Whining noise when Reroute power cable from battery to source unit directly, engine is running with bypassing the battery terminal in the fuse box. Check noise varying with the power connections to be sure they areclean. Check ground accelerator (noise level connections to be sure the ground wire is in direct contact varies with source unit with the bare metal surface of the chassis (with that spot volume control) scraped clean of any paint, rust or grease). SYMPTOM 8. Constant level whining noise (most noise with source unit volume at minimum) CAUTION: 9. Radiated noise: crackling noise on FM which is not present when playing tape or CD (noise varying slightly with accelerator but is present at all times) PROBABLE CAUSE Check for a ground loop in the system. the system off and, one-by-one, change the ground connections changing to a different contact point, scraping constant irrespective of metal clean of any paint, grease). Turn the system on and check for whining noise after each ground change. Do not disconnect the power amplifier's ground when the system is on. This could damage the amplifier. Check for defective signal cables. Disconnect signal cables at the amplifier and listen carefully for noise. If the noise disappears, run a test pair of signal cables. If there is no undesirable whining noise, reconnect to the amplifier with the new pair of signal cables. Check battery ground connection to the vehicle chassis to make sure it is tight and clean. Check battery negative terminal connection to make sure it is tight and clean. Check if the noise is actually radiated noise: tune a portable radio to the same FM station. Move the portable radio close to the vehicle engine. If crackling noise comes from the portable radio, then the noise you have in your vehicle audio system is radiated noise. Check with a VOM (volt meter) to makesure the antenna is really grounded to the vehicle chassis. To ensure a true ground, break the plastic covering of the antenna lead and solder a piece of heavy wire (minimum 14 gauge) to the braided shield. Ground the other end of the wire at the same point as the radio ground. Check spark plug wires. They should be suppression-type wire and less than 2 years old. Otherwise, replace them with good quality suppression cables. Make sure engine block is grounded to the vehicle chassis at a bare metal spot (scraped clean of paint, rust and grease). Make sure hood is also grounded. If not, use a ground strap (which is available from any auto parts store) to ground the hood to the vehicle chassis. 15 COUSTIC.COM SPECIFICATIONS: Rated Power @ 14.4 V (2% THD): 4 Ohm Rated Power @ 14.4 V (2% THD): 2 Ohm Frequency Response: Input Sensitivity: S/N Ratio @ Rated Power: Low-Pass Filter Crossover Frequency: (Continuously Variable, @36dB/Oct. ) Defeatable Subsonic Filter: Bass Boost Level: @ 45 Hz Dimensions: NOTES: 401DB 801DB 1 x 200 Watts 1 x 400 Watts 1 x 400 Watts 1 x 800 Watts 20–200 Hz 20–200 Hz ±0.5dB ±0.5dB 0.1 – 5 V 0.1 – 5 V 90dB 90dB 40–200 Hz 40–200 Hz 20 or 40 Hz 20 or 40 Hz 0–18dB 0–18dB 11" W (280mm) 11" W (280mm) 23.8" H (60mm) 23.8" H (60mm) 133. 16" L (335mm) 151.2” L (395mm) Due to continual product improvement, all specifications subject to change without notice. 17 COUSTIC.COMFRANCAIS FRANCAIS FRANCAIS FRANCAIS BIENVENU . . . Chez COUSTIC, un univers de Les nouveaux amplis classe D 401DB et 801DB delivrent la puissance la plus de toute l’industrie du ”12 volts”. fantastique design, ces amplis sont construits sophistiques. Dans ce manuel, vous trouverez Pour obtenir le meilleur resultat sonore, bien que possible. Le temps que vous lui consacrerez Pour exploiter au maximum le potentiel de votre ampli, d’autres produits COUSTIC, comme nos haut-parleurs, nos qui sont prevus pour parfaitement fonctionner ensemble. Quel que soit le produit dont vous avez besoin pour votre installation avec sa large gamme de composants a meme de satisfaire vos demandes C’est pour cela que COUSTIC ROCKS ! Aucune partie de cette publication ne peut etre reproduite, stockee ou transmise, sous quelque forme possible (mecanique ou electronique), sans l’accord ecrit de la societe COUSTIC ou MITEK Corporation. Veuillez aussi noter ci-dessous le numero de serie qui figure sous votre ampli. Conservez ce manuel comme future reference et comme preuve d’achat. Numero de serie : Date d’achat : CARACTERISTIQUES FILTRE ACTIF PASSE BAS INCORPORE REGLABLE Un filtre actif integre beaucoup d’avantages : cout reduit, plus simple, plus souple, generant moins de distorsion Les 401DB et 801DB integrent un filtre actif les per...
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