Alpine HDP-D90
Status Series 12-channel 1400 Watt car amplifier with digital signal processing
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The Alpine HDP-D90 is a high-performance 12-channel digital signal processor amplifier designed for audiophiles seeking studio-quality sound in their vehicles. As part of the Alpine Status series, it combines advanced DSP capabilities with powerful amplification to deliver an immersive listening experience. With Hi-Res Audio playback, extensive tuning options, and flexible input/output configurations, the HDP-D90 is engineered for precision and versatility.
Key Features
| Feature | Details |
|---|---|
| Audio Processing | Hi-Res Audio Playback (192kHz/24Bit); Internal Sampling Rate: 192kHz/64Bit; Ultra-wide bandwidth: 10Hz–110kHz |
| Amplifier Output | Channels 1–8: 50W RMS @ 4Ω; Channels 9–12: 80W RMS @ 4Ω; Channels 9–12 (bridged): 160W RMS x 2 @ 4Ω |
| Inputs | 12-channel high-level (up to 26V RMS); 2-channel RCA; Optical (SPDIF); Coaxial (Digital); Bluetooth audio streaming with included external module |
| Outputs | 10-channel RCA preamp outputs; 12-channel high-level amplified outputs |
| Equalization | 31-band parametric or graphic EQ per channel; Q: 0.404 ~ 28.85; Gain: -12.0dB ~ +12.0 dB |
| Crossovers | High-pass, low-pass, and band-pass filters per channel; Crossover points: 20Hz – 20kHz; Slopes: 12dB to 48dB/octave; Filter types: Butterworth, Linkwitz-Riley, Bessel |
| Time Correction | Up to 20ms delay per channel; Delay units: milliseconds, centimeters, or inches; Phase adjustment: 0° or 180° per channel |
| Control Interface | Wireless tuning via smartphone (iOS/Android) and PC; Optional wired LCD remote controller for volume, preset storage/recall, subwoofer level, and source selection |
| Design | Copper-plated chassis for enhanced signal-to-noise ratio (>110dB) and minimized distortion (THD: <0.001%) |
What’s in the Box
| Alpine HDP-D90 DSP Amplifier |
| 6" 26-Pin Input Harness |
| Bluetooth Module with Attached 6" Cable (RJ-45) |
| 5' USB Cable (Type-A to Type-B) |
| 2 Mounting Brackets |
| Four 3/4" Screws |
| Four 6mm Machine Screws |
| 4 Spare Speaker Output Set-Screws |
| 1/8" Brass Plug |
| Quick Reference Guide |
| Guide Addendum |
| Warranty Information |
| Registration Information |
What Others Are Saying
Eddie was great - SDCS installed a new head unit in my 2019 4Runner. He was honest in his opinions regarding the options I was considering. Pricing was also good - he was able to reuse some of my existing installation kit so I saved a bit of $$.Installation was clean and fast and he took the time to walk through the features before I left. Highly recommend!!
I had a great time at this shop! The staff really knows their stuff and took the time to explain the different options without pressure. Installation was quick, clean and professional. Everything looks factory and sounds amazing. The prices were fair and customer service was above and beyond. I highly recommend this place if you're looking for quality car audio and excellent service.
Those guys are really professional! I had a new Alpine floating head unit installed in my 2008 Mercedes, and it feels like a brand-new car. The installation was super clean. At first, the sound wasn’t the same as the factory stereo, but Kevin tuned it to be just as good—if not better—without adding any new amps. They even used my factory GPS antenna so I don’t have extra wires hanging out. On top of that, they matched the online price. Big thanks to Kevin and Eddie—highly recommended!
Kevin was awesome, he took his time and explained everything to me. I went in initially for a dash cam install and then decided to get a sub and amp installed as well. Both turned out great and will be returning if I need more work done.
Came In not knowing what to expect when suddenly my stereo stopped working. Spoke with Kevin in the front and after a VERY fast diagnosing they discovered my wiring was incorrect. After only about 45 minutes total being in the store I was on my way to the beach with a working stereo again! Thank you so much SDCARSTEREO
Highly recommend Kevin and the team at San Diego Car Stereo for any issues with aftermarket stereos. I bought a car with an aftermarket stereo and AC unit that wasn’t working properly—specifically, the heat wasn’t functioning due to an improper setup. I had several people look at it with no luck, and even the dealership basically refused to help because it was an aftermarket install. I came to Kevin and his team over the holidays feeling pretty defeated, but he was confident he could get the heat working before I headed back to a Colorado winter. Sure enough, he got it done.
FAQ
Do products purchased from San Diego Car Stereo come with a warranty?
Yes, all products come with a 1-year manufacturer warranty unless otherwise stated. This covers any defects excluding physical damage.
Are these products brand new?
Yes, every product we sell is 100% brand new, unused, and comes in original manufacturer packaging unless clearly marked otherwise.
Do you offer installation services?
Yes, we offer professional installation services at both of our San Diego Car Stereo locations. Our expert technicians have over 50 years of combined experience to install all of your car, marine, or offroad audio needs. Stop by or give us a call to schedule an appointment to get a quote in person.