RARE - DBX 128 dynamic range & DBX 100 sub harmonic synthesizer -Prototype?? For Sale


RARE - DBX 128 dynamic range & DBX 100 sub harmonic synthesizer -Prototype??
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RARE - DBX 128 dynamic range & DBX 100 sub harmonic synthesizer -Prototype??:
$69.00

Here is something you will not see in a long time. It\'s a rare DBX 128Dynamic Range Enhancer coupled with a DBX 100 BOOM BOX Subharmonic Synthesizer. I\'ll explain whatthis is.
First, the DB 128. It\'s pretty common. There are a bunch of right now. It\'s used to make a recording that is better than the original. You can compress the original when you record it and when you play it back, you can expand it and that givesback more dynamic range and also reduces the tape noise. I can\'t guarantee it works. I never used it with my tape decks. The controls seem to work as I canadjust the levels thatchange the LED from theyellow one to the red one.
The second unit is a DBX 100 BOOM BOX Subharmonic Synthesizer. What this does is, takes the input signal and cuts the bassfrequencies in half and thenreintroduces those into the signal. SO.. it takes 40 HZ signals in your music and adds in 20hz ones, takes 50 hzsignals and adds in 25 hz ones, takes 60 hz signals and adds in 30 hz ones. It\'s not a BASS control that just boosts the low end. If there is no 20 or 25 or 30 HZ signals to boos, a bass control does not help. A typical bass control also increases the higher bass which then makes the music muddy sounding.
This device puts back very very low bass signals that may have been lost with the original recording. I have done a video of how it works. Now, forget the sound. My camera mic isn\'t going to pick up these ultra lowfrequencies and your PC speakers probably can\'t reproduce them. But, I did video the woofer of the speaker and you can see how much MORE it moves with the unit ON and engaged than without the unit. Without the unit, you can;t see the woofer move at all, with the unit ON, you can see the woofer move quite bit. It\'s sort of dark, sorry.. crummy camera but you can see the increased woofer movement.
This is a RARE unit to have these both together. It looks like the DBX people took the sides off of one 128 box and one 100 box and put them together. This is 2 totally separate devices all in one case.There are even 2power cords. One for the 128 and one for the 100. Maybe this was some sort of prototype or something. Who knows
In what I read online (documentation andtheory of operation) before buying this, there were warnings about turning this up too much. You can damage your amplifier or over-extend the woofers in your speakers. I haveanother one of these (not with the 128 box but a different DBX sub harmonic Synthesizer but works the same way) and damage is possible. As I turn up the synthesizer level, I can SEE the massive 15\" woofers in my speakers move like mad even at low volumes. Then stuff starts shaking off the wall and the wife starts hollering. These things work and work good! Especially if your speakers have good bass to begin with. My EV Sentry III\'s will shake the walls without this unit but add this in and it\'s justcrazy. You can\'t hear it but even these crummy speakers I have in the video I can hear the ultra low end that has been restored.As you can see, the unit is in good physical shape. All theindicators work and the wood sides are nice. The faceplate is nice and clean and the controls all shine like they should. The feet fell of over time but they were just littlerubber ones stuck on. You can find stick on rubber feet anywhere.
Please see the video and ask any questions you may have.
offer early and offer often. You will NOT seeanother one of these 128/100 combo units.
This unit while working now is about 30 years old and is sold AS-IS. It could last one more day, one more year, or 30 more years.Shipping:
Shipping will be by UPS/Fed-EX or USPS. I pack well but can only do so much which is why I take theinsurance. If something goes wrong (Lost or broken) You will need to let the carrier know so we can file a claim and get you a refund.
The package will be insured against loss or damage and a tracking number will be provided. Use the shipping thing as an ESTIMATE for UPS/Fed-EX/USPS. Shipping may be high if you are clear across the country from me.
For packing, I would wrap the unit in the large heavybubble wrap and then put into a box that is big enough to have room (2 or 3 inches) on each of the 6 sides for foam peanuts. Using a big box may cause shipping to be a bit higher.
Local pickup is fine and free. I am right off the 94 expressway, about 45 miles north of Chicago and about 55 miles south of Milwaukee.
I have some other vintage audio stuff in other sales so please see them.



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