Emotiva USP-1 manual Choosing a Low Pass Filter

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Low Pass/High Pass Outputs

Recommended for users with speakers that do not have the capability to produce low bass tones (below 80Hz). Bookshelf speakers, smaller ‘satellite’, and home theater style speakers may be incapable of producing lower bass tones, either by design or simple size limitations.

To optimize the performance of the speakers, and to maximize the power output of the connected amplifier, use the High Pass outputs for your left and right speakers and adjust the High Pass filter frequency control (4) to select the cut-off frequency. All frequencies below this will be attenuated.

Use either the Balanced (2) or RCA (3) Low Pass outputs to connect to a powered subwoofer, and using the Low Pass filter frequency control (1) select the cut-off frequency. All frequencies above this will be attenuated.

It is recommended that you start at 80Hz for both, and adjust until you are satisfied with the result. Again, there is no right or wrong, only what sounds pleasing to you.

Choosing A Low Pass Filter

When connecting a powered subwoofer in a traditional “2.1” configuration, the built in amplifier of the powered subwoofer commonly has a variable on-board low pass filter. It is up to you which filter you choose (either the one built into the USP-1 or the one on the powered subwoofer), but USE ONLY ONE of the low pass filters. Using two low pass filters at once could result in phasing problems.

To use the Low Pass filter on the USP-1, adjust the Low Pass filter on the connected subwoofer by selecting the highest possible frequency. Then use the USP-1 Low Pass filter to select a frequency lower than the highest frequency on the subwoofer.

To use the Low Pass filter on the connected subwoofer, adjust the Low Pass filter on the USP-1 by selecting the highest possible frequency. Then use the subwoofer Low Pass filter to select a frequency lower than the highest frequency on the USP-1.

If your connected sub has an LFE connection, and you wish to use the USP-1 Low Pass filter, connect the USP-1 sub output to the LFE input. This bypasses the subwoofer’s internal crossover.

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Contents Page Page Table of Contents Page Safety Precautions Antenna Grounding Outside the House NEC National Electrical Code StandardsUnpacking the USP-1 Thank You for your USP-1 PurchaseEmotiva USP-1 Preamplifier Audiophile 2 Channel Preamplifier FeaturesTuner Source Selection Button Headphone JackCD Player Source Selection Button Phono Source Selection ButtonMute Button Motorized Volume ControlSoft Touch Power Switch HT Bypass ButtonTrigger Output USP-1 Rear Panel LayoutBalanced Subwoofer Output Main Power SwitchPower Receptacle Low Pass Filter Frequency ControlUSP-1 Remote Full Range Only Bass Management Low Pass/High Pass FiltersBass Management Close-up Low Pass/High Pass OutputsChoosing a Low Pass Filter Phono Connecting Audio Source UnitsTape Connecting To Amplifiers and SpeakersTroubleshooting Guide Other Probable Causes of Speaker Noise Problems with the whole A/V System Other Details USP-1 Technical SpecificationsLicensing and Trademark Disclosures Limited Warranty Service Assistance for the USP-1Emotiva Audio Corporation Page
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