{"product_id":"helix-ism-400-2dsp","title":"HELIX ISM 400.2DSP 2-Channel Subwoofer Amplifier Module with DSP","description":"\u003ch2\u003eHELIX ISM 400.2DSP: 2-Channel Subwoofer Amplifier Module with Integrated DSP\u003c\/h2\u003e\r\n\u003cp\u003eThe HELIX ISM 400.2DSP is a 2-channel subwoofer amplifier module with a built-in 1-channel DSP (digital signal processor), delivering up to 460W RMS at 2 x 2 ohms. It's built for adding a proper subwoofer to a factory sound system without ripping the whole thing apart. Compact, efficient, and EV ready, it fits neatly into modern vehicles including hybrids and electric cars.\u003c\/p\u003e\r\n\u003ch3\u003eProduct overview\u003c\/h3\u003e\r\n\u003cp\u003eThe ISM 400.2DSP is built for one job: adding a high quality subwoofer to a car that already has a factory sound system. Rather than replacing the whole setup, this module taps into the existing system and adds amplification plus digital tuning for the sub. It uses Class HD amplifier technology, a design that blends Class H and Class D principles so the internal supply voltage adjusts constantly to match the signal. This keeps heat down and efficiency up, which is why the unit can stay so compact. The DSP side runs on a 64 bit fixed point processor paired with high quality AD\/DA converters (the chips that turn analogue signal into digital and back), giving clean, accurate bass processing. A heavy duty stereo highlevel input accepts up to 32V RMS, which means it can safely read the speaker-level signal straight from an OEM amplifier, something many basic amplifiers can't do without extra gear.\u003c\/p\u003e\r\n\u003ch3\u003eFeatures and benefits\u003c\/h3\u003e\r\n\u003cp\u003e\u003cstrong\u003eUp to 460W RMS output, strong bass from a small box:\u003c\/strong\u003e at 2 x 2 ohms the ISM 400.2DSP can push up to 460W RMS, giving you real headroom to drive a proper subwoofer without the amp running out of puff.\u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003eBuilt-in 1-channel DSP, tuned bass integration:\u003c\/strong\u003e the onboard digital signal processor lets you shape how the subwoofer blends with the factory speakers, adjusting for where it sits in the car and the sound you're after. You'll need the DSP PC-Tool 6 software and some patience to get the most from it, so it's not a plug and forget install.\u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003eHeavy duty highlevel input up to 32V RMS, safe OEM signal pickup:\u003c\/strong\u003e many factory amplified systems push high signal voltages that a basic amp can't handle safely. This input is built to take that voltage without distortion or damage.\u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003eADEP.3 smart input circuit, trouble free OEM integration:\u003c\/strong\u003e modern factory head units actively monitor connected speakers and can throw error codes or disable features like fader if a standard amp is wired in wrong. ADEP.3 is designed to avoid tripping those checks.\u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003eClass HD amplifier technology, efficient and compact:\u003c\/strong\u003e this design adjusts the internal supply voltage to match the music signal, cutting wasted heat so the amp stays small and runs cooler than a standard design pushing similar power.\u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003eDirectDSP switch, bypass option for external processors:\u003c\/strong\u003e if you've already got a separate DSP in your system, this switch sends the signal straight to the power stage untouched, so the ISM just works as a dedicated subwoofer amp.\u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003eEV Ready power supply, works in hybrids and electric vehicles:\u003c\/strong\u003e the extended operating voltage range down to 6V for short periods and up to 18V means it copes with the different electrical systems found in modern EVs and hybrids, not just standard petrol cars.\u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003eSignal sensing auto turn-on:\u003c\/strong\u003e the module switches on when it detects a music signal, so it works reliably even with factory amps that don't provide a dedicated remote turn-on wire.\u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003eIMPACT enclosure subwoofer compatibility:\u003c\/strong\u003e it can directly power certain passive 2 x 2 ohm IMPACT enclosure subwoofers by swapping the connection terminal, turning a passive box into an active one.\u003c\/p\u003e\r\n\u003ch3\u003eWhat's in the box\u003c\/h3\u003e\r\n\u003cul\u003e\r\n\u003cli\u003e1 x HELIX ISM 400.2DSP subwoofer amplifier module\u003c\/li\u003e\r\n\u003cli\u003e3 x Connection cable\u003c\/li\u003e\r\n\u003cli\u003e1 x USB cable\u003c\/li\u003e\r\n\u003cli\u003e1 x Fuse\u003c\/li\u003e\r\n\u003cli\u003e1 x Mounting material\u003c\/li\u003e\r\n\u003cli\u003e1 x Instruction manual\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003ch3\u003eTechnical specs\u003c\/h3\u003e\r\n\u003ctable\u003e\r\n\u003ctbody\u003e\r\n\u003ctr\u003e\r\n\u003cth\u003eSpecification\u003c\/th\u003e\r\n\u003cth\u003eDetail\u003c\/th\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr\u003e\r\n\u003ctd\u003ePower RMS at 4 ohms\u003c\/td\u003e\r\n\u003ctd\u003e2 x 130 watts\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr\u003e\r\n\u003ctd\u003ePower RMS at 2 ohms\u003c\/td\u003e\r\n\u003ctd\u003e2 x 200 watts\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr\u003e\r\n\u003ctd\u003eMax. output power\u003c\/td\u003e\r\n\u003ctd\u003eUp to 460 watts RMS at 2 x 2 ohms\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr\u003e\r\n\u003ctd\u003eAmplifier technology\u003c\/td\u003e\r\n\u003ctd\u003eClass HD\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr\u003e\r\n\u003ctd\u003eInputs\u003c\/td\u003e\r\n\u003ctd\u003e2 x RCA, 2 x highlevel speaker input\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr\u003e\r\n\u003ctd\u003eInput sensitivity\u003c\/td\u003e\r\n\u003ctd\u003eRCA: 0.4 to 4 volts or 0.8 to 8 volts; Highlevel: 1.6 to 16 volts or 3.2 to 32 volts\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr\u003e\r\n\u003ctd\u003eInput impedance\u003c\/td\u003e\r\n\u003ctd\u003eRCA: 47 kOhms; Highlevel: 9 to 33 ohms\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr\u003e\r\n\u003ctd\u003eOutputs\u003c\/td\u003e\r\n\u003ctd\u003e2 x speaker output, 1 x AISA signal output\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr\u003e\r\n\u003ctd\u003eFrequency response\u003c\/td\u003e\r\n\u003ctd\u003e10 Hz to 20,000 Hz\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr\u003e\r\n\u003ctd\u003eDSP resolution\u003c\/td\u003e\r\n\u003ctd\u003e64 bit\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr\u003e\r\n\u003ctd\u003eDSP power\u003c\/td\u003e\r\n\u003ctd\u003e1 x 295 MHz (1.2 billion MAC operations per second)\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr\u003e\r\n\u003ctd\u003eSampling rate\u003c\/td\u003e\r\n\u003ctd\u003e48 kHz\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr\u003e\r\n\u003ctd\u003eDSP type\u003c\/td\u003e\r\n\u003ctd\u003e1 x audio signal processor\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr\u003e\r\n\u003ctd\u003eSignal converters\u003c\/td\u003e\r\n\u003ctd\u003eA\/D: BurrBrown 32 bit; D\/A: AKM 32 bit\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr\u003e\r\n\u003ctd\u003eSignal to noise ratio\u003c\/td\u003e\r\n\u003ctd\u003e102 dB (A weighted) at full power\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr\u003e\r\n\u003ctd\u003eDistortion (THD at 50 Hz, 1W into 4 ohms)\u003c\/td\u003e\r\n\u003ctd\u003eLess than 0.005%\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr\u003e\r\n\u003ctd\u003eDistortion (THD+N at 50 Hz, 1W into 4 ohms)\u003c\/td\u003e\r\n\u003ctd\u003eLess than 0.015%\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr\u003e\r\n\u003ctd\u003eDamping factor\u003c\/td\u003e\r\n\u003ctd\u003e85\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr\u003e\r\n\u003ctd\u003eOperating voltage\u003c\/td\u003e\r\n\u003ctd\u003e10.5 to 18 volts (max 5 seconds down to 6 volts)\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr\u003e\r\n\u003ctd\u003ePower rating\u003c\/td\u003e\r\n\u003ctd\u003eDC 12V, 45A max\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr\u003e\r\n\u003ctd\u003eIdle current\u003c\/td\u003e\r\n\u003ctd\u003e260 mA\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr\u003e\r\n\u003ctd\u003eOperating temperature range\u003c\/td\u003e\r\n\u003ctd\u003eMinus 40°C to plus 70°C\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr\u003e\r\n\u003ctd\u003eFuse\u003c\/td\u003e\r\n\u003ctd\u003e1 x 40A LP Mini fuse (APS)\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr\u003e\r\n\u003ctd\u003eAdditional features\u003c\/td\u003e\r\n\u003ctd\u003eStart-Stop capability, clipping LED, DirectDSP switch, Smart Control Port, 32 bit CoProcessor, ground lift switch, highlevel input with automatic turn on function\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr\u003e\r\n\u003ctd\u003eDimensions (H x W x D)\u003c\/td\u003e\r\n\u003ctd\u003e54 x 231 x 105 mm (2.13 x 9.09 x 4.13 inches)\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003c\/tbody\u003e\r\n\u003c\/table\u003e\r\n\u003ch3\u003eCompatible with\u003c\/h3\u003e\r\n\u003cp\u003eThe ISM 400.2DSP is compatible with the following passive 2 x 2 ohm IMPACT enclosure subwoofers, which can be converted to active using this module by replacing the connection terminal:\u003c\/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eIK ES10.1-DVC2 MK2\u003c\/li\u003e\r\n\u003cli\u003eIK E8.1-DVC2 MK2\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003cp\u003eIt is also suitable as a base for custom built active subwoofer solutions.\u003c\/p\u003e\r\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\r\n\u003cdetails style=\"border-bottom: 1px solid #e5e5e5; padding: 12px 0;\"\u003e\r\n\u003csummary style=\"cursor: pointer; font-weight: 600;\"\u003eCan the ISM 400.2DSP work with my car's factory sound system?\u003c\/summary\u003e\r\n\u003cdiv style=\"margin-top: 8px;\"\u003e\r\n\u003cp\u003eYes, it's designed specifically for that. The stereo highlevel input accepts up to 32V RMS, so it can safely read the signal straight from most factory amplifiers, and the ADEP.3 circuit helps it integrate without tripping factory fault checks.\u003c\/p\u003e\r\n\u003c\/div\u003e\r\n\u003c\/details\u003e\r\n\u003cdetails style=\"border-bottom: 1px solid #e5e5e5; padding: 12px 0;\"\u003e\r\n\u003csummary style=\"cursor: pointer; font-weight: 600;\"\u003eWill this work in my hybrid or electric vehicle?\u003c\/summary\u003e\r\n\u003cdiv style=\"margin-top: 8px;\"\u003e\r\n\u003cp\u003eYes, it's built as EV Ready with a Start-Stop capable power supply that handles voltage down to 6V for short periods and operates up to 18V, suiting the electrical behaviour of modern hybrid and EV platforms.\u003c\/p\u003e\r\n\u003c\/div\u003e\r\n\u003c\/details\u003e\r\n\u003cdetails style=\"border-bottom: 1px solid #e5e5e5; padding: 12px 0;\"\u003e\r\n\u003csummary style=\"cursor: pointer; font-weight: 600;\"\u003eHow much power does it actually put out?\u003c\/summary\u003e\r\n\u003cdiv style=\"margin-top: 8px;\"\u003e\r\n\u003cp\u003eIt delivers 2 x 130W RMS at 4 ohms, 2 x 200W RMS at 2 ohms, and up to 460W RMS maximum at 2 x 2 ohms.\u003c\/p\u003e\r\n\u003c\/div\u003e\r\n\u003c\/details\u003e\r\n\u003cdetails style=\"border-bottom: 1px solid #e5e5e5; padding: 12px 0;\"\u003e\r\n\u003csummary style=\"cursor: pointer; font-weight: 600;\"\u003eDo I need special software to tune it?\u003c\/summary\u003e\r\n\u003cdiv style=\"margin-top: 8px;\"\u003e\r\n\u003cp\u003eYes, the DSP functions are configured using DSP PC-Tool 6 software via the included USB cable. This gives you control over equalisation, bass tuning, and other DSP features.\u003c\/p\u003e\r\n\u003c\/div\u003e\r\n\u003c\/details\u003e\r\n\u003cdetails style=\"border-bottom: 1px solid #e5e5e5; padding: 12px 0;\"\u003e\r\n\u003csummary style=\"cursor: pointer; font-weight: 600;\"\u003eWhat's included in the box?\u003c\/summary\u003e\r\n\u003cdiv style=\"margin-top: 8px;\"\u003e\r\n\u003cp\u003eYou get the ISM 400.2DSP module, 3 connection cables, a USB cable, a fuse, mounting material, and an instruction manual. For anything else, please contact us.\u003c\/p\u003e\r\n\u003c\/div\u003e\r\n\u003c\/details\u003e\r\n\u003ch3\u003eDSP features\u003c\/h3\u003e\r\n\u003ctable style=\"width: 99.9604%; height: 473.047px;\"\u003e\r\n\u003ctbody\u003e\r\n\u003ctr style=\"height: 40.332px;\"\u003e\r\n\u003cth style=\"width: 17.9425%;\"\u003eFeature\u003c\/th\u003e\r\n\u003cth style=\"width: 74.3791%;\"\u003eDetail\u003c\/th\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr style=\"height: 86.543px;\"\u003e\r\n\u003ctd style=\"width: 17.9425%;\"\u003eTuneEQ\u003c\/td\u003e\r\n\u003ctd style=\"width: 74.3791%;\"\u003eAutomated frequency response correction using a single measurement per channel or channel pair with a suitable measurement microphone, adjusting the parametric equaliser to match a reference curve.\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr style=\"height: 86.543px;\"\u003e\r\n\u003ctd style=\"width: 17.9425%;\"\u003eAugmented Bass Processing\u003c\/td\u003e\r\n\u003ctd style=\"width: 74.3791%;\"\u003eCombines Dynamic Bass Enhancement and SubXpander to boost deep bass and sound pressure, with an option to add subharmonic tones between 50 and 100 Hz for a deeper bass character.\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr style=\"height: 63.4375px;\"\u003e\r\n\u003ctd style=\"width: 17.9425%;\"\u003eDirectDSP\u003c\/td\u003e\r\n\u003ctd style=\"width: 74.3791%;\"\u003eRoutes the input signal straight to the power stage without DSP processing, for use when an external DSP already handles signal processing.\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr style=\"height: 109.648px;\"\u003e\r\n\u003ctd style=\"width: 17.9425%;\"\u003ePower Save Mode\u003c\/td\u003e\r\n\u003ctd style=\"width: 74.3791%;\"\u003eSwitches off the internal amplifier stages when no music signal is detected for a set time, returning to normal operation within about 2 seconds once a signal is detected again. The delay can be adjusted or switched off in the DSP PC-Tool software.\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr style=\"height: 86.543px;\"\u003e\r\n\u003ctd style=\"width: 17.9425%;\"\u003eACO (Advanced 32 Bit CoProcessor)\u003c\/td\u003e\r\n\u003ctd style=\"width: 74.3791%;\"\u003eHandles control and communication tasks, enabling fast system startup and quick switching between up to ten sound setups, plus features like AISA, DLC, and RTC.\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003c\/tbody\u003e\r\n\u003c\/table\u003e","brand":"HELIX","offers":[{"title":"Default Title","offer_id":67737605472349,"sku":"ISM4002DSP","price":1150.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/9528\/9437\/files\/ipmt-media-aTNEau.webp?v=1791926386","url":"https:\/\/frankiesautoelectrics.com.au\/products\/helix-ism-400-2dsp","provider":"Frankies Auto Electrics","version":"1.0","type":"link"}