Resolut H-DSP Review: 12-Channel Processing for Systems Beyond Eight Channels
Updated: Oct 6
The Resolut H-DSP is a 12-channel car audio processor that Resolut built on the technology of its eight-channel A-DSP MK2, using two Analog Devices ADAU1452 chips so every channel keeps the same 192 kHz/64-bit processing. Six AK4490R 32-bit DACs, rated at 120 dB dynamic range, feed the 12 outputs. At an India MRP of ₹2,99,990 it sits between the A-DSP and the 16-channel M-DSP in Resolut's range. It's meant for systems that have outgrown eight channels, such as a fully active front stage with active rear speakers and subwoofers. Our H-DSP product page has today's price.
Quick summary
Twelve outputs from six AK4490R DACs and two ADAU1452 processors working at 192 kHz/64-bit.
Coaxial and optical inputs are built in; analogue, USB, Bluetooth and MOST 25 inputs are plug-in modules.
Resolut DSP Tool adds a selectable DAC output filter to 20 EQ bands per output, crossovers and delay.
It costs ₹80,000 more than the A-DSP for four extra channels, and the Zapco and Alpine alternatives below deserve a look.
Resolut H-DSP specifications
Specification | Resolut H-DSP |
|---|---|
Type | 12-channel digital signal processor |
Outputs | 12 analogue |
Digital inputs | 2 (coaxial and optical S/PDIF) |
Analogue inputs | 8 per Resolut's manual, through the plug-in analogue module |
Processors | 2 x Analog Devices ADAU1452, 192 kHz / 64-bit |
DACs | 6 x AK4490R, 32-bit, 120 dB dynamic range |
Signal-to-noise ratio (digital input) | 140 dB |
Analogue output frequency range | 2 Hz – 65 kHz (Resolut catalogue) |
Tuning | 20 parametric EQ bands per output; crossovers 10 Hz – 25 kHz; delay 0–15 ms; selectable DAC output filter |
Presets | 4 |
Supply voltage | 10–16 V; dips to 6 V allowed for 2–3 s |
Dimensions and weight | 235 x 152 x 45 mm; 1.45 kg |
India MRP | ₹2,99,990 |
Figures come from Resolut's H-DSP page, its catalogue and its DSP Tool manual. The frequency range appears on Resolut's catalogue card rather than the product page. Our store listing differs from Resolut's published figures in a few places, and we've followed Resolut: it shows 2 Hz – 60 kHz for the output range, eight analogue inputs as standard and Windows-only software.
What 12 channels let you do
Resolut's reasoning is simple: eight independent outputs used to be the unofficial standard for car processors, but upgrades in mid-range and premium cars often need 12. Every speaker on its own channel gets its own crossover, EQ and delay, and passive crossovers can go.
In practice, 12 outputs cover a fully active three-way front stage (six channels), an active two-way rear pair (four) and two subwoofer channels. On an eight-channel processor, something in that list would have to run passively or be dropped. If your plan stops at a three-way front and a subwoofer, the A-DSP already has enough outputs.
Two processors, six DACs: what's inside
Splitting the work across two ADAU1452 chips is how Resolut keeps each of the 12 channels at the processing quality of the eight-channel A-DSP MK2. The converters are six two-channel AK4490R chips, one per output pair, and the software lets you choose the DAC's output filter type to fine-tune its character.
Note what you aren't buying. Resolut rates these DACs at 120 dB, slightly below the 122 dB it quotes for the A-DSP's AK449X, so the H-DSP's premium pays for channels rather than better conversion. If converter performance is your priority, the T-DSPmk2 and M-DSP use ESS's ES9038PRO instead.
Inputs and modules
The coaxial and optical S/PDIF inputs are standard. For analogue sources, Resolut lists the A-IN module, which takes up to eight channels at line level or speaker level; its manual says analogue input availability depends on the installed plug-in, so budget for the A-IN if you're keeping a factory head unit. Digital options are the USB-IN HQ, the BT-IN aptX Lossless Bluetooth module and the M25-IN for factory MOST 25 systems. The SRC remote adds volume, subwoofer level, source and preset control.
Tuning a 12-channel system
Twelve channels mean twelve sets of crossovers, EQ and delay to get right, so the tune takes longer and matters more. Resolut DSP Tool runs on Windows 10/11 and macOS 13 or newer, according to Resolut's current manual, stores four presets in the processor, can mix several inputs into one output and can import measurements from REW. An automatic tuning routine isn't listed. Our guide to setting up a DSP in your car explains the basic order of work.
What owners and reviewers say about the Resolut H-DSP
We found no owner reviews or independent tests of the H-DSP when we checked in October 2026. The H-DSP pages at two Russian dealers, Magnitolkin in Moscow and Avtozvuk-SPB in St Petersburg, show no customer reviews, and Drive2, where Russian installers post their builds, blocked our access. Resolut's own H-DSP announcement is promotional. If you've installed or owned one, we'd like to hear about it.
H-DSP vs A-DSP, M-DSP and the alternatives
Within Resolut, the A-DSP (₹2,19,990) gives eight outputs with a slightly higher-rated DAC, and the M-DSP (₹7,49,990) gives 16 outputs with two ES9038PRO DAC blocks and two ADAU1467 chips.
Two alternatives in our store change the value picture. Zapco's HDSP-Z16 V AD-16A (₹2,74,990) costs less yet offers 16 RCA outputs, eight built-in speaker-level inputs, an HD music player, a Wi-Fi module and a touchscreen dashboard; it processes at 96 kHz with AK4458 DACs that Zapco rates at 115 dB as standard. Alpine's HDP-D90 (₹2,99,999) is a 14-channel DSP with a built-in 12-channel amplifier (8 x 50 W plus 4 x 80 W at 4 Ω and 10% THD) and 12 speaker-level inputs, though Alpine says it needs its optional RUX-C810 controller to run without Alpine's HDS-990 head unit. The H-DSP's case against both rests on Resolut's processing and converter design, not on features.
Who should buy it, and who shouldn't
Choose the H-DSP if you're planning a system with nine to 12 active channels, you want Resolut's processing on every one of them, and you'll feed it a good digital source or the A-IN with separate amplifiers.
Look elsewhere if eight channels will do (the A-DSP saves ₹80,000), if you'd rather have amplification or speaker-level inputs built in, or if better converters matter more to you than channel count. For a first DSP, our explainer on why car audio systems need a DSP is a better starting point than a processor at this level.
Installation notes for Indian cars
The H-DSP has the same 235 x 152 x 45 mm footprint as the A-DSP and weighs 1.45 kg, so it fits under a seat or behind a boot panel. Twelve outputs mean a lot of signal cabling: place the processor close to the amplifiers to keep runs short, label every channel and keep signal leads away from power cables. Ventilation matters in a hot boot. Resolut's manual allows brief dips to 6 V on a 10–16 V supply, but a weak battery at idle with the AC on is still worth fixing first. VA3 Car Studio in Ghaziabad offers professional installation and can tune the DSP.
Price and where to buy
The Resolut H-DSP has an MRP of ₹2,99,990. Check today's price on our H-DSP listing and ask us which modules your installation needs. The A-IN and SRC are ₹44,990 MRP each, and the USB-IN HQ, BT-IN and M25-IN ₹54,990 each.
The bottom line
The H-DSP is Resolut's answer for systems that need more than eight channels: two processors, six DACs and 12 outputs, all tuned in the same software as the rest of the range. Its converters are rated a touch below the A-DSP's, and rivals offer more features for the money, so buy it for Resolut's processing across 12 channels and for nothing else.
Resolut H-DSP FAQ
How many amplifier channels can the Resolut H-DSP drive?
It has 12 analogue outputs, so it can feed up to 12 amplifier channels. It is a processor only, without built-in amplification, so you'll need separate amplifiers for every speaker you connect.
Is the H-DSP's DAC better than the A-DSP's?
Not on paper. Resolut rates the H-DSP's six AK4490R DACs at 120 dB and the A-DSP's AK449X at 122 dB. The H-DSP's extra cost pays for four more channels and a second processing chip.
Can the H-DSP take a factory head unit's speaker outputs?
Yes, with Resolut's A-IN module, which accepts up to eight channels at line level or speaker level. Ask us to confirm which inputs your unit includes before you order.
Buy the Resolut H-DSP 12-Channel DSP Processor in India
Check the Resolut H-DSP 12-Channel DSP Processor price in India, browse more Resolut DSP processors or compare all car DSP processors in India. Want it fitted properly? Book DSP installation and tuning at our Ghaziabad studio.
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