User manual CARVIN HT150

[. . . ] This symbol is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN This symbol is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance. LIMITED WARRANTY Your Carvin product is guaranteed against failure for ONE YEAR. Carvin will service and supply all parts at no charge to the customer providing the unit is under warranty. Shipping costs are the responsibility of the customer. CARVIN DOES NOT PAY FOR PARTS OR SERVICING OTHER THAN OUR OWN. [. . . ] CHANNEL 1/4" PHONE JACK INPUT Sturdy one piece aluminum handles make for easy transporting along with facilitating rack installation. The rack mounting holes are designed on ISO standard spacing. Four 10-32 x . 5" phillip machine screws are normally used to secure the amp. Rear support brackets are not required. 2. POWER SWITCH This stereo phone jack is designed to receive either balanced or unbalanced input signals. Balanced signals coming into this jack should be wired with the connector's tip going to signal + and the connector's ring to signal -. 9. SPEAKER OUTPUTS Check the power amp connections and verify the AC line power source before engaging the POWER switch. The yellow LED unmistakably indicates that all circuits are properly powered up. This color was chosen so the operator could see other red indicators from a distance. 3. CHANNEL LEVEL CONTROL The standard 1/4" SPEAKER jacks are used for most applications. Turn the amp off before connecting your speakers. 10. SPEAKER BINDING POSTS A precision 41 step input LEVEL attenuate is used to adjust the volume levels. To deliver the amps full power without reducing headroom of the signal source, the level controls should be turned up approximately 1/3 (15 on the dial). 4. CHANNEL SIGNAL INDICATOR For heavy-duty speaker connections, use the rear BINDING POSTS to connect your speakers. Wire sizes up to 7 gauge (50 amps) can be inserted into the binding posts "side holes". Larger cable can be used with "banana" plugs which plug into the ends of the binding post (remove colored caps). Binding posts are spaced on ISO standards. Use the two center RED binding posts for BRIDGE speaker connections (see 11 BRIDGE MODE). 11. BRIDGE MODE--25V/70V DISTRIBUTION SYSTEMS The green SIGNAL LED indicators will start to flash when there is a signal passing to your speakers (-30dBM). This lets you know when the amp is passing a signal to your speakers. 5. CHANNEL CLIP INDICATOR The red CLIP LED indicators will start to flash when each channel has reached its maximum output. Occasional flashing caused by lower bass frequencies is OK. [. . . ] Caution: Never use shielded cable (microphone or instrument input cable) to connect speakers. These cables will not handle the required current and may cause your amplifier to oscilate because of the internal shield. INPUT CONNECTIONS The preferred method of connecting input signals is with balanced XLR's (two conductors plus a shield wire, such as Carvin professional XLR cables). Balanced input signals provide the highest gain and best noise rejection. 1/4" stereo cables are also capable of providing balanced input by using a stereo plug (tip-positive, ring-negative & sleeve-ground). [. . . ]