TonyD'Amore

good question...Tony can probably answer that better. Also, FYI: technically, its only skipping .2v. Ahh good point. I fail at looking at the pictures. I still have no clue where to fit 2 VU Dins and 2 of these, plus 6 switches, 1 bass knob, 2 8s, and an ipad in my center console. A couple of notes on how it works. * It is self calibrating. No means or need to manually calibrate. -- because I could * The voltage displayed above each LED represents the center of the "range" of each LED. What I mean is that if the LED for "12.8" is displayed the actual voltage would be between 12.65-12.95. The next LED "13.1" would be from 12.95 to 13.25. Ect. So each LED represents a range of 300mV I guess you could say, and the calibration of each LED is centered precisely in the center of the range. -- For the people saying they want to know their "exact" voltage... I assure you this is more accurate than your "digital readout". This is real circuitry, all analog. Robust and self calibrating. I feel that this is a great way to monitor your voltage. It gives you a visual representation of where the voltage is vs a number that you have to try to read as it is changing. Because that type has to be "read" there has to be circuitry in them to slow them down. So it is really difficult to see the minimums and maximums during musical peaks. This is why some fluke meters have the "min/max" function, because otherwise our brains and eyes aren't fast enough to see them. With this fast responding moving indicator, it's pretty easy. I hope you love it as much as I do. Tony

The PCB is 2.125 X 2.125, but it will probably have a housing around it of some sort so it will be slightly larger.

Love it Steve! I'm a big fan of this design, I had eight 5" woofers in one of these at one point in life, I still miss the sound of that box.

call me stupid but what exactly is it for? (in noob terms please) Speaker testing, box designing / tuning will be one of the common uses.

Nice!!!

Just a few things off the top of my head, i'm sure some pro installers out there have even more uses for it. 1. Signal Generator (this unit makes a true sine wave unlike some of the old units that made a stepped square wave) 2. Ported or bandpass box tuning - It will tell you exactly where your port is tuned 3. Measuring the T/S parameters of speakers (Fs, Qts, Vas, ect) can be measured and calculated with some knarly math. We will provide a spreadsheet or formulas to ease the pain. 4. Test passive crossovers 5. Find the Fs of any speaker (got some nice tweeters you want to bi-amp but not sure how low you can cross them? This tool will tell you) I'm sure there are other uses as well

The Thiele-Small parameters for speakers (Fs, Qts, Vas, Qms..ect.) are measured at low level. Is this what you are referring to?

The preliminary owner's manual is available for download here: http://damoreengineering.com/vu-din.html

Rip the CD to a .mp3 format at 320kbps. You can use iTunes or windows media player to do that. Then use the .mp3 tracks.

Tune with the car off. The difference is less than 1dB of gain overlap and has already been factored in because the amplifier is unloaded when the speakers are disconnected.

does that mean you're going to get back to work on the din sized VU meters now? Yes sir...and the LD-2

Nothing better than waking up at 6am on a Saturday morning being anxious about how our products are doing, and then seeing a thread like this one. Y'all just made my morning.

That's what I'm talking about! Awesome news!

How did it go?

Good stuff right here. Thx 727

Make sure "sound check" is turned off in iTunes

Thanks for the great review!!

Thanks for the great reviews and feedback!

Nice work Decaf!

Glad to hear your distortion detector is working well. Our defective rate is really really low on the tool. Glad that you've tried it out on another setup. If the distortion light is on, there is distortion somewhere. We have found the following with the DD-1 by having issues like you had: * Bad line output convertors * Bad ground loop isolators * Bad iPods * Bad headunits * damaged amplifiers * distorted signal processors Its pretty amazing what it can stiff out, good luck!

Sounds like you have one of the few good headunits around these days

We will be on the lookout for it. Thanks again for all the videos.

The only other test I can think of that might be useful would be to put the DD-1 CD into a home CD or DVD player and connect the RCA straight into the DD1 from the CD or DVD player's analog outputs. Use the 0dB tracks and see what kind of results you get. Other than that, just get it to us. Please give me your serial number and send it to us. We will run some tests on it and take care of whatever is going on and get it right back to you. We appreciate the videos and info to help us. Please put a note in the box with your return address, and your t-shirt size. I want to throw you one for your troubles and time making the videos. Thanks Tony D'Amore D'Amore Engineering 340 Paseo Camarillo Suite 202 Camarillo, California 93010

I have tested a least a dozen headunits that are distorted at 40Hz, from both the RCA outputs and speaker outputs. I have looked at them on a scope and they don't look that bad to the naked eye, but they are very distorted. I wouldn't want a headunit in my system that has this problem. Yes 9.5% THD!!

Sounds like your crossover is distorting the signal