Announcement: We at Studio Electronics will soon be offering a new desktop remote control unit for AMS gear. We've been working on this model for the last year or so, and they will be available for sale early this summer. The unit will be packaged in an enclosure similar to the Lexicon LARC, and will be capable of controlling an AMS RMX16 reverb and a DMX 15-80S or S-DMX delay simultaneously. It will include two Chorus Controller programs, slider control of A and B pitch change, and numerous other features. This will be a very nice accessory for AMS owners and we're very proud of it. If you're interested please contact us, and we'll keep you posted on pricing and availability.Here’s a really superb AMS S-DMX from Studio Electronics. It is in great condition and has been fully refurbished.  This is the rarely seen S-DMX version - the last and best DMX model that AMS ever built.  It sounds perfect and works beautifully.  The serial number 4846. It has dual delay (up to 6.4 seconds per channel), dual pitch change (with the de-glitch board), dual lock in, flanging, VCO vibrato, automatic double tracking, and the Remote Control / Chorus Controller ready DB25 remote connector.  The electronics have been fully serviced in our shop.The memory, precisely controlled from the front panel, is maxed out -- 6.4 seconds on the left and 6.4 seconds on the right. It has one-octave pitch shifters on both channels and the lock in function, with a deglitch card (some earlier DMX’s do not have this).  The main chassis includes the later, higher current power supply and all the electrolytic capacitors in the power supplies have been replaced.  The unit runs on 110, 220, or 240 volts, 50/60 Hz.  All settings are stored in battery backup RAM; the unit has a fresh battery.  All the internal ribbon cables have been replaced with new ones.  The power transformer looks like it’s brand new.  The unit is extremely clean and in excellent cosmetic and mechanical condition. The front panel looks nearly mint. People are always asking us about the differences between the 15-80S and the S-DMX.  Here’s the story.  AMS produced the 15-80S series for many years, making numerous improvements along the way.  In about 1984 they phased out the  15-80S and replaced it with the S-DMX.  This newer version had all the features of the latest DMX’s and more.  The S-DMX had higher density (6.4 second) memory boards so fewer boards were needed, there was less strain on the power supply, the unit had better airflow, and it ran cooler.  It had System 6 software (which fixed some minor bugs).  The chassis was lighter yet more rugged, and the wiring harness was neater and less fragile.  Since all the updates (including dual lock in and sampling) were already built into the hardware and software, S-DMX’s never have the messy mods and updates that are sometimes seen in the 15-80S versions.  In short, this was a better machine.  Unfortunately, not many of them were ever built.  Soon after the S-DMX was released, the whole line went out of production.  These are by far the best of the AMS delays, but they are pretty hard to find.We will include a complete copy of the original owner’s manual along and a power cord.  A complete 90 day warranty is included.This is an absolute top of the line AMS S-DMX unit, in very good condition. The front panel looks near mint, the enclosure looks great except for slight paint discoloration in some areas.Our shop is fully set up to service AMS gear with extensive documentation and spares in stock, and we know these units inside out.  In the unlikely event that something goes wrong, we’ll service your unit and get it back to you promptly.AMS DMX’s and RMX’s show up about once a week on ebay.  Why should you buy yours from Studio Electronics?1. Reburb and testing: every AMS that we sell has been been thoroughly serviced and tested.  Any marginal components are replaced and the 10 or so all important ribbon cables are replaced with new ones.  The unit is thoroughly tested and then run for several days.  The power supplies are throughly serviced and checked.  Normally we charge $700 for this service, and it’s worth every penny.  An AMS purchased from us has been given a new lease on life and is likely to be trouble free for many, many years.2. Marginal parts: Since we refurb so many AMS’s, we know what to look for.  If the fan runs slow we know the unit will run hot, and we replace it with the exact same, quiet running part.  If a switch is bent or noisy or if pot is faulty, we replace it.  If an PC card connector is worn, we replace it.  If a fastener is missing from the top or bottom cover, we replace it.3. Function and specs test: most AMS sellers on ebay don’t own a manual, and don’t know all the features of these machines.  Before listing this DMX on ebay we checked lock in, loop editing, the mix functions.  Using a Chorus Controller unit, we tested the remote control port.  Most sellers don’t have the knowledge or the equipment to properly check these functions.4. Upgrades.  We stock all the DMX and RMX EPROM’s, and every AMS we sell has been upgraded with the latest software that the hardware will support, with every possible feature included.5. Support: if something goes wrong, we’ll get you taken care of quickly.  Our shop stocks hundreds of spare AMS boards and keeps several working units on hand.  Next week or next year, if there’s a problem, call us.  We’ll be glad to help you out, and will do so quickly. No other AMS seller on ebay will do this. Here’s your chance to own a truly legendary, great sounding piece of outboard gear.  AMS began producing their DMX delay and RMX reverbs in 1979, and continued manufacturing until about 1985.  These two products were a huge hit in the pro audio industry, and were used on thousands on huge hit records.  The sonic quality trounces any Protools plug in out there -- there’s something about these units that just sounds incredibly good.SPECIFICATIONS 
Inputs: 2 XLR inputs, electronically balanced, 10K impedance. 
Outputs: 2 XLR outputs, electronically balanced, 150 ohms impedance. 
Maximum gain: 20 db.  Maximum output level: 24 dbV. 
Distortion: Less than .035% at 1khz full output.  Dynamic range: 90 db. 
Frequency response: 20 Hz to 18 kHz -3db, + 0dbThanks for looking and please con