Couldn't Load Pickup availability
The AudioControl Altitude A1100.5 is a 5-channel car amplifier rated at 4 x 125 W + 1 x 600 W RMS (1,100 W total at 2 ohms), part of AudioControl's Altitude Amplifier Series. One slim chassis handles full front and rear speakers plus a subwoofer.
Key specifications
- Channels: 5/4/3
- Power (RMS at 14.4V, 4 ohms): 90 W x 4 + 400 W x 1
- Power (RMS at 14.4V, 2 ohms): 125 W x 4 + 600 W x 1
- Inputs: 6, high/low input modes (low 6V max, high 20V max)
- Crossover: Linkwitz-Riley, off/high pass/low pass, 50 Hz to 5 kHz
- Bass processing: ParaBASS, variable subsonic filter
- Valet Mode, start-stop compliant, EV compliant up to 17V
- Remote level control: ACR-1 (optional)
- Dimensions: 14" W x 6.7" D x 2.1" H, 7.95 lbs
AudioControl Altitude Amplifier Series
The Altitude Series is built with a minimalist, low-profile aesthetic without compromising on power or audio quality. These amplifiers are designed to perform at the top of their class in any vehicle installation.
Features
- High/low input modes (low 6V max, high 20V max)
- GTO Signal Sense
- Linkwitz-Riley crossovers
- Start-stop compliant
- ParaBASS low frequency contouring
- Valet Mode option — limits maximum volume to 25% when activated
- Optional ACR-1 remote level control
- EV compliant up to 17V
Valet Mode protects your system from unintended damage by capping volume at 25% when enabled. The A1100.5 is also compatible with start-stop systems and electric vehicles up to 17V, making it a practical fit for modern cars.
If your vehicle has a factory head unit without preamp outputs, AudioControl's LC7i 6-Channel Line Out Converter pairs well with this amplifier, converting speaker-level signals to clean RCA outputs.
The ParaBASS control allows you to fine-tune low-frequency response to suit your listening preferences and vehicle acoustics.
Explore the full range in AudioControl Altitude Marine.
Specification
| Channels | 5/4/3 |
|---|---|
| Inputs | 6 |
| Continuous Power (RMS) at 14.4V | 90W x 4 @ 4Ω +400W x1 @ 4Ω125W x 4 @ 2Ω +600W x 1 @ 2Ω |
| Maximum Input Voltage | Low: 6V maxHigh: 20V max |
| S/N Ratio (ref | rated power): 95.1 dBAchannels 1-4103.9 dBAchannel 5 |
| Valet Mode | Y |
| THD+N | <0.25% &<0.75% |
| Subsonic Filter | Variable |
| Linkwitz-Riley X-Over | Mode: OffHigh PassLow PassLinkwitz-Riley X-Over Freq. Range: 50Hz -5K Hz |
| Bass Processing | ParaBASS® |
| Remote Level Control | ACR-1 (optional) |
| Dimensions | 14” W x 6.7” D x 2.1” H |
| Weight | 7.95 lbs |
What's Included
- A1100.5 Amplifier
- Manual
- Warranty
AudioControl
About the AudioControl A1100.5
From our tech experts at CEN
The AudioControl Altitude A1100.5 is a 5-channel car amplifier delivering 4 x 125 W + 1 x 600 W RMS (1,100 W total at 2 ohms). A single low-profile chassis handles front and rear speakers plus a subwoofer. It is start-stop compliant and EV-compatible up to 17V.
Who it suits
The A1100.5 is well suited to drivers upgrading a full car audio system — speakers and subwoofer — without running multiple amplifiers. It works in modern vehicles including stop-start and mild-hybrid cars. Browse the full AudioControl range if you need a different channel count or power output.
Our tech experts advise
Vehicles with a factory head unit and no preamp outputs will need a line output converter; AudioControl's LC6i or LC7i work well with this amp. High and low input modes accept signals up to 20 V, covering most OEM systems. Use the ParaBASS control to adjust low-frequency response once installed. Fitting is priced per vehicle — see our car audio installation page for details.
Explore the full AudioControl range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all AudioControl
Recommended For You
Discover more top-rated gear, handpicked to go with what you're viewing
Have it Fitted By Our Team
Our team fits car audio, stereos, dash cams and vehicle security at our workshop in Beeston, Nottingham. Tell us your vehicle and we'll confirm the parts and a fitted price.
- 1
Tell us your vehicle
Make, model and year, and what you'd like fitted.
- 2
We confirm the parts
Fascia, wiring and interfaces checked for your car, with a fitted price.
- 3
Fitted at our workshop
Bring it to our Beeston workshop and we do the rest.
Unit 25 Technology Drive, Beeston, Nottingham NG9 1LA
More from AudioControl Altitude Marine
More options from the same range, in stock and ready to go
Frequently Asked Questions
Q: How many channels does the A1100.5 have?
A: It is a 5-channel amplifier that can also be configured for 4 or 3 channels: four channels for speakers plus a dedicated subwoofer channel.
Q: What is Valet Mode on the A1100.5?
A: Valet Mode limits the maximum volume to 25% when activated, protecting your system from unintended damage.
Q: Will the A1100.5 work in a car with start-stop or an electric vehicle?
A: Yes. Altitude amplifiers are start-stop compliant and EV compliant up to 17V.
Not Sure Where to Start?
Straightforward advice and the latest news from our Nottingham team.
All Guides and News →
Car Audio
Christmas Gift Guide 2026: Car Audio, Dash Cams and Outdoor Tech
Read the guide →
Car Audio
Upgrading Car Audio Without Replacing the Factory Stereo
Read the guide →
Car Audio
Amplifier Wiring Kits Explained: Gauge, Fuses and Earths
Read the guide →
Car Audio
New at CEN: Option Audio Drive-10Flat — Golf Mk8 Bass, Zero Boot Space Lost
Read more →
Car Audio
Car Speaker Sizes Explained: What Fits Your Car
Read the guide →
Car Audio
Alpine iLX-F905D Halo9 Review: The Big-Screen Upgrade for Almost Any Car
Read more →