SMD DD-1+ Distortion Detector Plus

SMD DD-1+ Distortion Detector Plus is an audio distortion detector from SMD for car-audio system calibration and amplifier gain setup. This page identifies the exact variant rather than a general product family, so the configuration, model code, and barcode can be checked together before purchase.

Key features

• Purpose: Detects signal distortion and supports accurate amplifier gain-overlap setup without relying on an oscilloscope.
• Gain overlap: Continuously adjustable from 0.0 dB to 15.0 dB in 0.1 dB steps.
• Input range: Autoranging operation from 1.2 Vrms to 200 Vrms, equivalent to the stated 40,000 watts at 1 ohm maximum reference.
• Detection: Triggers above 1.0% harmonic distortion and includes a quasi-RMS voltmeter for clipping checks across frequencies.
• Power management: Low-battery indication below 6.5 VDC, battery self-test at startup, and automatic shutoff after approximately 8 to 10 minutes.
• Included: DD-1+ detector, calibrated test-tone CD, measurement harness, and manual.
• Function: Distortion effect.

Choosing the correct configuration

Confirm that the system voltage is within the specified input range, follow the supplied test-tone and connection procedure, and set gain overlap according to the amplifier, speakers, and installation goals. Product photos may show details from several angles; use the written model and identifier fields below as the final reference for this listing.

Product details

• Brand: SMD
• Model / SKU: DD-1+
• Product type: Electronics & Amplifiers
• GTIN: 680220998341