Product Description

The purpose and benefit of the D’Amore Engineering / SMD Distortion Detector.
The purpose of this tool is to enable the installer to set the gain of an audio amplifier to match the source unit’s output level, accurately and quickly. It can also be useful for detecting distortion in the audio signal caused by poorly designed or malfunctioning audio equipment.

What is included?
The Distortion Detector (DD-1))
Protective silicon rubber boot
Calibrated Test tone CD
Harness
This manual
Pride of ownership

About the design
When you pick up the DD-1, know that you are holding a precision piece of equipment. If treated as such it should provide you with many years of reliable service. We have chosen a 9V battery as a power source for a few reasons:
They are readily available

Isolating the DD1-1 from the vehicle’s electrical system for power, guarantees that it will only measure what it is supposed to measure; the audio signal, not noise in the charging system. We also chose an RCA input connector for a few reasons:
It makes it pretty easy to measure the output of a headunit directly, if you choose to do so
Should the harness become damaged it is easily replaceable or repairable in the field

Specifications
Everyone hides these in the back of the book. We are proud of our specs, they aren’t lies, so we are putting them up front.
The Distortion Detector’s circuitry is 100% analog
Distortion Detection trigger level > 1.0% Harmonic Distortion
Guaranteed operating range of input signal is 1.2Vrms – 125Vrms. (15,000 Watts at 1 ohm) Autoranging
Signal Present LED trigger voltage 750mVrms
Low Battery LED trigger battery voltage < 5.6Vdc
Auto-shut off timer 8 - 10 minutes after ON button is pressed

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Product Reviews

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5
SM DD1

Posted by Susan on Dec 25th 2021

Got this for my husband for Christmas and he just opened it and is very happy. Timing couldn’t be better as he just recently installed custom systems in both our cars. The BONUS is that the instruction manual is ALL IN ENGLISH! I haven’t seen that in over 20 years! Thank you SMD and Sky High!
5
SM dd1

Posted by Susan on Dec 10th 2021

I got this for my husband for Christmas, so he hasn’t gotten it yet, BUT, what I can give a review about is the AWESOME, fast ordering-delivery time! My order was shipped immediately and arrived sooner than expected. Thank you.
5
Best tuning option

Posted by Dennis on Aug 20th 2021

I was hesitant to spend the money on the dd-1 but I am so glad I did. With this I was able to get way more out of both my 4 channel and mono amp. Well worth the money
5
review

Posted by David A luke on Mar 23rd 2021

this thing works perfectly
5
dd1

Posted by Carl on Sep 29th 2020

this tool is great tuned my system up in literally 5 min,best tool I have for car audio hands down
5
SMD DD-1

Posted by Matthew Zenith on Jul 25th 2020

Great Product !! Works as it should and I even noticed a difference in my amplifier’s performance.
5
SMD DD-1

Posted by Mike B on Jun 25th 2020

Worked perfect for my amps and dsp. I normally use a o-scope but i like this a lot better and it is very easy to use for DIY people.
5
Works as should

Posted by KEVIN J WENZEL on Jun 3rd 2020

Works as should and easy to use
5
Gains set easily

Posted by Alex Silva on May 21st 2020

Properly tuning your amp is only way to make sure you get the best performance from it. The dd1 does just that. If your headunit can't take CD discs, than you can download the tracks from the D'amore Engineering website.

Steve Meade SMD DD-1