The SMD Distortion Detector Plus DD-1+ is a professional audio measurement tool designed to help installers set amplifier gain accurately, quickly, and consistently. Built for car audio professionals, the DD-1+ matches an amplifier's gain to the output level of the source unit while also detecting distortion caused by incorrectly adjusted, poorly designed, or malfunctioning audio equipment.
As SMD's advanced gain-setting tool, the DD-1+ includes all the core functions of the original DD-1 while adding the ability to measure and recheck system gain overlap without changing existing settings. This makes it especially useful for verifying installations when a vehicle returns for service or determining whether amplifier settings have been altered.
Precise Gain Overlap Measurement
The DD-1+ allows installers to set audio system gain overlap from 0.0 dB to 15.0 dB in precise 0.1 dB increments. The gain overlap can also be checked independently, allowing technicians to verify an existing installation without making any adjustments.
This is particularly useful for professional installers who need to confirm that an audio system remains configured to its intended specifications after installation.
Advanced Distortion Detection
The DD-1+ incorporates SMD's patent-pending distortion detection system, combined with a digital microcontroller and proprietary firmware. Its quasi-RMS voltmeter can detect clipping at virtually any frequency, helping installers identify distortion accurately during amplifier setup.
The unit supports input levels from 1.2 Vrms to 200 Vrms with autoranging, making it suitable for high-powered car audio systems.
Key Features:
- Professional amplifier gain-setting tool
- Sets audio system gain overlap from 0.0–15.0 dB
- Adjustable in precise 0.1 dB increments
- Checks existing gain overlap without changing amplifier settings
- Helps verify whether gain settings have been altered after installation
- Advanced distortion detection system
- Digital microcontroller with proprietary firmware
- Quasi-RMS voltmeter
- Detects clipping at any frequency
- Maximum input capability of 200 V
- Automatic input range selection
- Designed for professional car audio installation
Technical Specifications:
-
Model: DD-1+
-
Distortion Detection Trigger: >1.0% harmonic distortion
-
Guaranteed Input Range: 1.2 Vrms–200 Vrms
-
Maximum Input: 200 V
-
Gain Overlap Range: 0.0–15.0 dB
-
Gain Adjustment Resolution: 0.1 dB
-
Input: Autoranging
-
Low Battery Indicator: Activates below 6.5 VDC
-
Auto Shut-Off: Approximately 8–10 minutes after activation
-
Battery: Includes battery self-test and status display during initialization
What's Included:
- SMD Distortion Detector Plus DD-1+
- Protective silicone rubber boot
- Calibrated test-tone CD
- Connection harness
- User manual
The SMD DD-1+ is an essential tool for professional car audio installers who need a reliable way to set amplifier gain, detect clipping, measure gain overlap, and verify system calibration with precision.
