From the rotary volume control to 21 watts of 4-way high power, you get tried-and-true Alpine reliability from the CDM-9801 CD receiver. Bring your road mixes, because Alpine's digital servo CD drive plays your homemade CD-Rs and CD-RWs flawlessly. The sensitive MaxTune tuner pulls in your favorite radio stations with ease.

Use the Bass Engine® to modify the tone contour — set the bass and treble center frequencies and levels, then customize these tone settings for CD and radio with the source tone memory feature. Expand your listening choices by adding the CHM-S630 Alpine CD changer.

Details:
  • detachable face
  • MaxTune tuner
  • 12 FM/6 AM presets
  • plays audio CDs, CD-Rs, and CD-RWs
  • Bass Engine (bass center frequency, width, and level, plus treble center frequency and level adjustments)
  • source tone memory
  • CD changer controls for the CHM-S630 6-disc changer (will control the CHA-S634 6-disc changer with optional M-Bus/Ai-Net cable)
  • optional auxiliary input
  • preamp outputs
  • MOSFET internal amp
  • clock
  • 21 watts RMS/45 peak x 4 channels
  • CD frequency response 5-20,000 Hz
  • CD signal-to-noise ratio 105 dB
  • FM sensitivity 9.3 dBf
  • 1-year warranty

Why replace your factory radio?

Two good reasons - sound quality and cool features. A new car stereo offers power that's superior to most factory radios, along with more sophisticated tone controls. And most car stereos offer built-in or optional features that add safety and fun to life in your car, including inputs for your iPod or MP3 player, Bluetooth connectivity for hands-free cell phone calls, satellite radio or HD Radio reception, and connections for building an audio system in your car.

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Hands-on research

What's in the box?

Download owner's manual

  • AM/FM/CD/Changer controller receiver
  • Sleeve
  • Face
  • Hard plastic face case
  • Trim ring
  • Wiring harness (has in-line fuse holder with 15A fuse)
  • 4 ISO-mount screws
  • Owner's Manual (English/French/Spanish)
  • Customer Care Registration card

Features and Specs

General
CEA-2006 Compliant ---
RMS Power Output 21 watts
Peak Output 45 watts
RMS Power Bandwidth N/A
Preamp Outputs 2-channel
Sub Preamp Outputs No
Switchable Rear Preamp Outputs ---
Video Screen No
Preamp Voltage 2 volts
Display Color Green
Key Button Color Green
EQ Bands None
Wireless Remote No
Steering Wheel Control Compatible ---
Parts Warranty 1 Year
Labor Warranty 1 Year
Expandability
AUX Input Optional
Audio/video Input
USB Input ---
Memory Card Slot No
Bluetooth Compatible ---
Satellite Radio Ready No
HD Radio ---
Navigation ---
iPod Compatibility
Full size ---
Nano ---
Touch ---
Mini ---
iPhone ---
Tuner
FM Sensitivity 9.3 dBf
European Tuning Yes
Seek/Scan Seek
Radio Data System No

Product Research

Features
Changer Controls
Clock Display Note

Features

Bass Engine: Bass Engine functions provide control over your system, so you can tailor the sound to your personal tastes. Bass Engine includes the following functions:

  • Bass Center Frequency Control: To tailor bass response to your preference, you may select the bass control's center frequency. You may select from the following center frequencies: 60Hz, 80Hz, 100Hz, or 200Hz.
  • Bass Width Control: You may choose from four band width (Q-Factor) settings for the bass control; the bass control can be set to affect a wide or narrow band of frequencies.
  • Bass Type: You may choose from the following Bass Type settings: Type 1, Type 2, or Type 3. Type 1 will sound best if you have a subwoofer in your system. Use Type 2 or Type 3 if you are using small diameter speakers.
  • Treble Center Frequency Control: To tailor treble response to your preference, you may select the treble control's center frequency. You may select from the following center frequencies: 10kHz, 12.5kHz, 15kHz, or 17.5kHz.
  • Subwoofer Level Control: The level of the subwoofer preamp outputs can be adjusted to balance the output of your subwoofer with that of your other speakers.

Auxiliary Input Ready: With the addition of the optional KCM-122B M-Bus/RCA interface cable, the audio from an auxiliary source can be played through this unit. When the KCM-122B interface cable is used, a CD changer cannot be connected to the head unit.

Changer Controls

Compatibility: This unit is compatible with 6-disc Alpine M-Bus CD changers. Using the optional M-Bus/Ai-NET compatible cable (KCA-130B), this unit can control the CHA-S634 Ai-NET 6-disc CD changer.

Clock Display Note

Clock Operation: This unit allows you to choose "keyed" or "unit on" clock operation. When the clock has been given display priority and the unit is turned off, the clock will be displayed whenever the ignition key is in the "on" or "accessory" position. If the clock is not given display priority, the clock is not displayed when the unit is off.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.