{"product_id":"open-box-monoprice-swa-400-400w-subwoofer-amplifier-with-dsp-presets-31029","title":"Open Box Monoprice SWA-400 400W Subwoofer Amplifier with DSP \u0026 Presets 31029","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eRetail price (new): $649.99\u003c\/strong\u003e\u003c\/p\u003e\nThe Monoprice SWA-400 400Watt Subwoofer Amplifier is a powerful audio amplifier designed for home audio systems. With a maximum power consumption of 600 watts and adjustable low-pass filter ranging from 60 to 150 Hz, this amplifier delivers hard-hitting power at 4 ohms impedance. It features DSP and user-defined presets, making it versatile for different audio setups. The sleek black design and digital tuner add a modern touch to your audio system. Built by Monoprice, a trusted brand known for quality audio products, this amplifier is a reliable choice for enhancing your TV, video, and home audio experience.\u003cbr\u003e\u003cbr\u003e\u003cul\u003e\n\u003cli\u003eMaster Volume: Sets the overall subwoofer output in relation to the main speakers. Values range from ‑9dB to +9dB, selectable in 3dB increments. The volume should be set to achieve an even balance between full‑range program and subwoofer output.\u003c\/li\u003e\n\u003cli\u003ePreset Choose: Selects one of 3 presets. Preset 1 is optimized for 8\" in‑wall subs, Preset 2 is optimized for 10\" in‑wall subs, and preset 3 is optimized for 12\" subs.\u003c\/li\u003e\n\u003cli\u003eCrossover Frequency: Selects the highest frequency cut‑off point to the subwoofer. If you are using larger main speakers use lower frequencies below 100Hz. A smaller main speaker will require more reinforcement from the subwoofer, so the crossover should be set to higher frequencies above 100Hz. A good starting place is the lower limit of the frequency response of the main speakers.\u003c\/li\u003e\n\u003cli\u003eCrossover Slope: Also known as roll‑off, the slope refers to how abruptly the high frequencies are cut off. The SWA‑400 offers 4 slopes from ‑12dB to ‑48dB. This setting refers to how many decibels above the selected Crossover Freq are attenuated (turned down) per octave. A gradual slope of ‑12dB allows more bleed of higher frequencies to pass through the subwoofer. This is useful with smaller or cheaper main speakers that are less efficient at reproducing bass. Higher slopes are more effective when used with high efficiency and bigger main speakers that do produce sufficient bass.\u003c\/li\u003e\n\u003cli\u003ePhase: This puts a slight delay on the signal sent to your subwoofer. Since the main amplifier drives the main speakers with full‑range sound, the main speakers are reproducing bass frequencies along with the sub. If you have a front firing sub that is in the same plane as the mains, then the phase can be set to 0. Down‑firing, rear‑ported, or subs placed away from the mains will smear the bass tones and the frequencies will cancel each other out as they bounce around the room. Try different settings and walk around your listening area for the optimum setting.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\u003cul\u003e\n\u003cli\u003eLow‑Cut: Selects the lowest frequency that the amp will reproduce. This is useful for smaller subs, 10\" and below. Since smaller speakers cannot reproduce extreme low frequencies, it is best to limit the system to what they can reproduce. This will maximize the efficiency of the subwoofer system and minimize over‑extension and speaker failure. Please check with your subwoofer manufacture's manual and specs for speaker limitations.\u003c\/li\u003e\n\u003cli\u003eMode Select: Selects between Sub and LFE modes. The Sub setting is the normal operating mode for the SWA‑400. LFE mode bypasses the Crossover Freq function of the SWA‑400. Use this mode if you are connecting the SWA‑400 to the LFE output of your amplifier or AV receiver.\u003c\/li\u003e\n\u003cli\u003eAuto Standby: If no audio signal is present for an extended period of time, the SWA‑400 can be switched into standby mode to conserve electricity. Choose from 5‑30 minutes in 5 minute increments or turn the function off.\u003c\/li\u003e\n\u003cli\u003eMemory Storage: Once the system is set to your liking, save your settings to one of three memory storage locations. Different settings for music, movies, and night time are a good use for memory storage positions.\u003c\/li\u003e\n\u003cli\u003eMemory Recall: Loads one of the three user‑defined memory storage locations\u003c\/li\u003e\n\u003cli\u003eProtection: Short circuit and thermal protection circuits are built‑in.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003e Open box\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Monoprice\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e Monoprice SWA-400\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e SWA-400, 31029, 131029\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Audio Amplifiers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeatures:\u003c\/strong\u003e 400 watts of deep, hard-hitting power at 4ohms impedance., Hard-Hitting Power at 4 ohm Impedance., 400 W of Deep\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReceiver Combo Features:\u003c\/strong\u003e Digital Tuner\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAudio Outputs:\u003c\/strong\u003e Subwoofer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmplifier Class:\u003c\/strong\u003e D\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Power Consumption:\u003c\/strong\u003e 600 watts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine Input Sensitivity:\u003c\/strong\u003e 190mV\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Warranty:\u003c\/strong\u003e NA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Low‑Pass Filter:\u003c\/strong\u003e 60 ~ 150 Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Taiwan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e 400 W\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Monoprice","offers":[{"title":"Default Title","offer_id":49267373179102,"sku":"EBAY-237043917905","price":390.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0796\/2587\/9774\/files\/s-l1600_748ba09b-a2e9-423f-b8a3-f882e5c45699.jpg?v=1792691895","url":"https:\/\/westsideliquidations.com\/products\/open-box-monoprice-swa-400-400w-subwoofer-amplifier-with-dsp-presets-31029","provider":"Westside Liquidations","version":"1.0","type":"link"}