Vintage ARP Omni 1 Keyboard Synthesizer Serviced with LED Sliders

Description

This ARP Omni Mk I has just been serviced by Synthchaser – recapped, new key bushings, new LED illuminated sliders, new reliable pushbutton switches, clean, fully functional, calibrated, in tune and sounding great.  This keyboard is the sound of Joy Division and is all over The Cars’ “Moving In Stereo”, and many other late 70’s/early 80’s albums.  It produces the lush Solina/String Ensemble sounds plus has a polyphonic synthesizer section with a voltage controlled filter, LFO, and ADSR, and a dedicated bass synthesizer section.

Overall very good condition, with some marks on the panel where someone marked their favorite settings, and some damage at the back of one of the side panels (see photos).  The keyboard has been extensively serviced by Synthchaser in October 2024.  Work done included:

• Synthchaser Precision LED slider upgrade.  All 15 of the old original sliders have been replaced with new, smooth, high precision LED illuminated sliders.  The difference in the way these sliders feel and perform compared to the originals is a huge improvement.
• Synthchaser replacement pushbutton switches – All 10 of the original pushbutton switches (which are notorious for having the mechanical latches break) have been replaced with retrofits.  The original switch caps are still installed.
• Power supply rebuilt – All tantalum and electrolytic capacitors in the power supply have been replaced, and high quality, high temperature 105 deg C capacitors have been used for the power supply filter capacitors.
• All tantalum capacitors replaced – The tantalum capacitors in ARP synths are ticking time bombs.  All of the over 100 tantalum capacitors in this synth have been replaced with electrolytics to help provide stable operation for years to come.
• 4075 Filter Enhancement – The ARP Omni uses the same 4075 filter submodule found in the Odyssey, Quadra, Avatar, and Pro DGX.  The original filter has been recapped, and enhanced to provide superior frequency response.
• Keyboard rebuild – New key bushings installed, buss bar & key contacts cleaned and adjusted, keybed leveled, keys ultrasonically cleaned
• Oscilloscope calibration – Fully calibrated to factory spec using oscilloscope and frequency counter.

Prospective buyers are welcome to come try it out before purchasing. Local pickup is welcome and encouraged.  If being shipped, the instrument will be packed well and insured for the full purchase price, but this is a vintage electronic item, so all sales will be as-is and final.  But visit the Synthchaser youtube channel and rest assured that a high quality detailed restoration was done to this synthesizer.

If picking up locally and paying cash not only will you not pay shipping, but I will include a free anvil case (it will need cleaning and new foam) for the ARP Omni 1!