DAPAudio Palladium P-400 User Manual

Contents

DAPAudio Palladium P-400 User Manual Manual pdf 11 page image

10Bridged Mono OperationBoth amplifier channels can be bridged together to make a very powerful single channel amplifier. Whenthe Mode switch is set to the “Bridge” position, 1 channel “pushes”, while the other “pulls” equally. Thuseffectively doubling the power. Use extreme caution when operating the amplifier in the bridged mode.To bridge the amplifier, set the mode switch to the “Bridge” position. Apply the signal to Channel A’sinput and connect the speakers across the “hot” outputs – the red binding posts – of Channel A and B.Channel B’s “hot” output is in phase with the input. For operation adjust only the Channel A’s inputattenuator, while Channel B’s input will not function (Channel B’s input signal has been disconnected).Bridging PrecautionsNever ground either side of the speaker cable when the amplifier is in bridgedmode; Both sides are „hot“. If an output patch panel is used, all terminals mustbe isolated from each other and from the ground.Switches and controlsInput AttenuatorsWhenever possible, set attenuators fully clockwise to maintain optimum system headroom. The inputattenuator controls (one for channel A, one for channel B) located at the front panel adjust gain for their,respective amplifier channels in all modes. See the specifications at the end of this manual for standardvoltage gain and input sensitivity information. When operating the amplifier in bridged mode, bothattenuates must be in the same position, so the speaker load will be equally shared between thechannels.Mode-Select-SwitchThe rear panel mode select switch determines whether the amplifier is in the stereo or bridged monomode. Do not operate the mode select switch with the amplifier on.Ground Lift SwitchIn a properly designed system (for safety and to minimize noise), the amplifier should receive its groundfrom the line cord. Whenever possible, the signal source equipment should share the same AC ground asthe amplifier(s). In some cases, this may result in a ground loop. If this happens, remove the use theground lift switch to lift the signal ground and isolate it completely from the chassis / AC ground.IndicatorsThe Palladium features 4 front LED indicators per channel: Clip, Signal, Protect und Power. These LEDindicators inform the user of each channel’s operating status and warn of possible abnormal conditions.Clip LEDA channel’s red clip LED will light dimly at the onset of clipping and increase in brilliance, as clippingbecomes more severe, staying on until the clipping ceases. If the LED’s are flashing quickly andintermittently, the channel is just at the clip threshold, while a steady, bright glow means the amp is cliplimiting, or reducing gain to prevent severely clipped waveforms reaching the speakers.