CARVIN HT150 (01) PDF MANUAL

The appliance should not be used near water (near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool, etc). Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through openings.

The product should be connected to a power supply only of the type described in the operating instructions or as marked on the appliance.

Precautions should be taken so that the grounding or polarization is not defeated.

Power supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience receptacles, and the point where they exit from the appliance.

The user should not attempt to service the appliance beyond that described in the operating instructions. All other servicing should be referred to qualified service personnel.

If your unit is equipped with a fuse receptacle, replace only with the same type fuse. Refer to replacement text on the unit for correct fuse type.

The conductors in the AC power cord are colored in accordance with the following code:

• GREEN & YELLOW – Earth
• BLUE – Neutral
• BROWN – Live

A molded main plug that has been cut off from the cord is unsafe. NEVER UNDER ANY CIRCUMSTANCES SHOULD YOU INSERT A DAMAGED OR CUT MAIN PLUG INTO A POWER SOCKET.

Check the power to the unit. Check for tripped circuit breakers, unplugged extension cords or power-strip switches that may be turned off. Check the fuse. If a dark brownish color or no wire can be seen within the glass fuse, then replace. The unit may be perfectly fine but occasionally the fuse may blow because of high AC voltage surges. After the fuse has been replaced with the proper value and if the fuse fails again, the product will require servicing (be sure to use a slow blow fuse if required). Check your input and speaker output cables.

Avoid spilling liquids or allowing any other foreign matter inside the unit. The panel of your unit can be wiped from time to time with a dry or slightly damp cloth in order to remove dust and bring back the new look. As with all pro gear, avoid prolonged use in caustic environments (salt air). When used in such an environment, be sure the amplifier is adequately protected by rack, covers, etc.

The specifications for the HT150 Power Amp are as follows:

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.

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.

A precision 41 step input LEVEL attenuate is used to adjust the volume levels. To deliver the amp’s full power without reducing headroom of the signal source, the level controls should be turned up approximately 1/3 (15 on the dial).

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.

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. However, consistent flashing caused from higher frequencies may damage high frequency drivers (excessive distortion). This does not cause damage to the amp.

This switch, when set to its ‘in’ position will boost the highs and lows by +4dB at 80Hz and 12kHz. This works well as a loudness contour when operating at low volume levels or adds flavor when using it in a bass or guitar rack. When set to the ‘out’ position it provides a flat output response. Try it both ways and set as desired.

For most professional applications, use the XLR balanced input. This will help to reduce hum and allow of longer cable runs from your signal source (mixer, etc). Because this is a balanced input, the gain will be 6 dB higher than using the 1/4″ input jack with a non balanced line. XLR pin configuration:

• Pin 1: Grounded through the GROUND LIFT switch
• Pin 2: positive Bal. signal
• Pin 3: negative Bal. signal

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 -.

The standard 1/4″ SPEAKER jacks are used for most applications. Turn the amp off before connecting your speakers.

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.

The HT150 can be operated in bridge mode if you require a 25V / 70V distribution speaker system or a high powered mono (single channel) amp. With your amp off, push in the rear BRIDGE switch after you have made your speaker connections to the rear center RED binding posts (ch 1 is + and ch 2 is -). No other speaker jack or binding post can be used at the same time! The INPUT and LEVEL is handled by channel 1. Channel 2 is non-operational. The minimum speaker impedance is 4 ohms or a 25V distribution line. CAUTION: The power developed by bridging your amp can destroy most speaker systems!

Your amp is designed to run on either 120V 60 Hz or 230V 50V depending on the model purchased. The voltage range for 120V is 95V to 132V and for 230V it is 190V to 253V. The rear heavy-duty AC cord is designed for your country. Be sure to check your power source before plugging into a grounded (3 prong) outlet. Never defeat the grounded connection or electrocution may result!

• 120V MODELS: 2.5AGC
• 230V MODELS: 1.25AGC

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). Not all sources provide balanced outputs. If this is the case, standard 1/4″ input cables work fine with cable lengths under 25 feet (single conductor plus shield) providing there is no ground loop in the system.

There are two 1/4″ speaker jacks available for speaker connections (one for each channel). Additionally, there are two pairs of binding posts that not only allow for high current connections to speakers but are also used for “bridging” the amp’s output. Use heavy gauge wire for all speaker connections (no lighter than 16 gauge up to 50′, Carvin’s PH50). 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 oscillate because of the internal shield.