“The panel has some small scratches and the ARP Axxe logo sticker is missing, but the silkscreening is strong and clear. Please see photos for condition. From an electronic standpoint, this has been totally overhauled:
Synthchaser Precision LED slider upgrade. All 23 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.
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 tantalum capacitors in this synth have been replaced with electrolytics to help provide stable operation for years to come.
All CMOS and Op Amp ICs replaced – The original CMOS chips and op amps used in these synthesizers are prone to failure. We find it a best practice to replace all these chips in this keyboard to fix issues it may be having and to prevent future issues from popping up as chips fail. New IC chips have been socketed where space allowed for ease of future servicing.
4075 Filter Enhancement – The ARP Axxe uses the same 4075 filter submodules found in the Quadra, Odyssey, Omni, Avatar, and Pro/DGX which was designed with a calculation error that limited the cutoff frequency. The 4075 filter submodule has been recapped, and corrected to provide superior frequency response, and tested for proper operation in the Synthchaser custom test fixture.
Keyboard rebuild – New key bushings installed, keys removed and ultrasonically cleaned, bus bars removed and polished, key contacts cleaned and adjusted, keybed leveled.
Beautiful walnut side panels – the original side panels were replaced with custom crafted hardwood Walnut panels.
Pots and switches cleaned
New pitch bend knob
New power cord
Main circuit board washed to clean off 40+ years of dirt and grime that entered through the slider openings
Oscilloscope calibration – Calibrated & tuned using oscilloscope and frequency counter.
1/4″ output made High – ARPs of this era had an RCA jack as the high output and the 1/4″ jack as the low output. As today RCA jacks are an inconvenience for most, the 1/4″ jack has been made to a second high output. This modification is easily reversible by cutting 1 wire.”
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