Oberheim OB-Xa

POLYPHONIC  |  BACK

Oberheim OB-XaThe Oberheim OB-Xa was Oberheim's overhaul of their first compact synthesizer, the OB-X. The OB-Xa was released in 1980, a year after the OB-X was released. Instead of discrete circuits for oscillators and filters, the OB-Xa (and the Oberheim synths to follow) switched to Curtis integrated circuits. This made the inside of the synth less cluttered, reducing the labor required to replace bad parts; and reduced the cost of manufacture. However, today it's much easier to fix an OB-X than OB-Xa, as Curtis parts are getting scarcer, whereas discrete parts used in OB-X are almost always readily available.

Aside from hardware changes, the OB-Xa had better interface features compared to OB-X. These included being able to split the keyboard into two halves with different voices; the ability to layer voices to create thicker sound (essentially making two notes sound for every key pressed). polyphony stayed the same - again 4,6 and 8-voice models were offered.

One function that did disappear from OB-X voice architecture, was cross modulation, or frequency modulation of vco with the second vco. When done with analogue circuits, it's a unique sound made famous by Prophet 5 and its poly-mod section. Lack of this somewhat reduced the range of sounds possible on OB-Xa.

See availability on eBay

OBERHEIM OB Xa SYNTHESIZER 8 VOICE 120 PROGRAMS
OBERHEIM OB Xa SYNTHESIZER 8 VOICE 120 PROGRAMS
$3,998.00
Time Remaining: 11d 20h 31m
Buy It Now for only: $3,998.00
Add to watch list
Oberheim OB Xa Voice Card Ultimate Service Kit Watch Video
Oberheim OB Xa Voice Card Ultimate Service Kit Watch Video
$109.99
Time Remaining: 8d 16h 56m
Buy It Now for only: $109.99
Add to watch list
Oberheim OB Xa Synthchaser Upgraded Cable Wire Harness Replacement Set
Oberheim OB Xa Synthchaser Upgraded Cable Wire Harness Replacement Set
$99.99
Time Remaining: 1d 2h 22m
Buy It Now for only: $99.99
Add to watch list
Oberheim OB Xa Voice Card Full Trimmer Kit  120 pieces
Oberheim OB Xa Voice Card Full Trimmer Kit 120 pieces
$87.99
Time Remaining: 8d 16h 57m
Buy It Now for only: $87.99
Add to watch list
Oberheim OB Xa Power Supply Capacitor  Rebuild Kit Watch Video
Oberheim OB Xa Power Supply Capacitor Rebuild Kit Watch Video
$66.99
Time Remaining: 6d 1h 41m
Buy It Now for only: $66.99
Add to watch list
Oberheim OB Xa Voice Card Rebuild Kit Watch Video
Oberheim OB Xa Voice Card Rebuild Kit Watch Video
$66.99
Time Remaining: 21d 18h 49m
Buy It Now for only: $66.99
Add to watch list
Oberheim OB Xa T Shirt 100 Cotton Retro Analog Synthesizer Sem Ob 1 Ob 8
Oberheim OB Xa T Shirt 100 Cotton Retro Analog Synthesizer Sem Ob 1 Ob 8
$15.39
Time Remaining: 26d 12h 44m
Buy It Now for only: $15.39
Add to watch list
VIRTUAL Oberheim OB Xa OBXa editor programmer Encore 12 LOGIC v4 X
VIRTUAL Oberheim OB Xa OBXa editor programmer Encore 12 LOGIC v4 X
$19.99
Time Remaining: 17h 55m
Buy It Now for only: $19.99
Add to watch list
Oberheim OB X OB Xa OB 8 OB SX DX DMX OB 1 Matrix 12 Xpander Replacement Battery
Oberheim OB X OB Xa OB 8 OB SX DX DMX OB 1 Matrix 12 Xpander Replacement Battery
$12.99
Time Remaining: 25d 9h 19m
Buy It Now for only: $12.99
Add to watch list
Internal Battery for Oberheim DX OB 1 OB SX OB X OB Xa OB 8 Matrix 12 Xpander
Internal Battery for Oberheim DX OB 1 OB SX OB X OB Xa OB 8 Matrix 12 Xpander
$13.50
Time Remaining: 14d 10h 53m
Buy It Now for only: $13.50
Add to watch list
OBERHEIM OB XA SERVICE MANUAL
OBERHEIM OB XA SERVICE MANUAL
$16.00
Time Remaining: 11d 20h 28m
Buy It Now for only: $16.00
Add to watch list
Oberheim OB XA OBXA Vintage Synthesizer Push Button SWITCH PERFECT CIRCUIT
Oberheim OB XA OBXA Vintage Synthesizer Push Button SWITCH PERFECT CIRCUIT
$13.99
Time Remaining: 16d 21h 10m
Buy It Now for only: $13.99
Add to watch list
Oberheim OB SX  OB XA 1 4 inch mono plug with washer
Oberheim OB SX OB XA 1 4 inch mono plug with washer
$6.90
Time Remaining: 7d 3h 49m
Buy It Now for only: $6.90
Add to watch list
OBERHEIM Matrix 12 6 Xpander MC 3000 OB x 6 8 12 SYNTHESIZER rerigerator magnet
OBERHEIM Matrix 12 6 Xpander MC 3000 OB x 6 8 12 SYNTHESIZER rerigerator magnet
$7.00
Time Remaining: 17d 20h 52m
Buy It Now for only: $7.00
Add to watch list
Oberheim OB 1 OB SX OB X  OB XA New AC power socket
Oberheim OB 1 OB SX OB X OB XA New AC power socket
$2.90
Time Remaining: 11d 4h 40m
Buy It Now for only: $2.90
Add to watch list
Oberheim OB 1 OB SX OB X  OB XA Replacement Power Inlet Jack
Oberheim OB 1 OB SX OB X OB XA Replacement Power Inlet Jack
$4.99
Time Remaining: 24d 18h 33m
Buy It Now for only: $4.99
Add to watch list






EBAY US AUCTIONS

Moog MiniMoog Model D
Saturday, August 19th, 2017
Roland MKS-7 Super Quartet rack version of JUNO 106 professional overhauled
Saturday, August 19th, 2017
Roland Juno-106 Keyboard Synthesizer and Power Cord
Saturday, August 19th, 2017
Moog Mother-32 Semi Modular Synth Module with Moog 3.5mm TS Cables and a Cloth
Saturday, August 19th, 2017
Roland SH-101 GAIA Keyboard Analog Synthesizer Used Japan
Saturday, August 19th, 2017
Studio Electronics MIDImini Minimoog Model D ORIGINAL – USED – PERFECT CIRCUIT
Saturday, August 19th, 2017
MOOG WERKSTATT 01 Semi Modular Analog Synthesizer w/ CV Expansion Board
Saturday, August 19th, 2017
Moog Mother-32 Semi Modular Synth Module
Saturday, August 19th, 2017
Overhauled! Roland JUNO-106S w/ Speakers Perfect Working!
Saturday, August 19th, 2017
Moog Minimoog D Reissue , 100% Analog Synth / 44keys , New //ARMENS//
Saturday, August 19th, 2017
Moog Mother-32 Semi Modular Synth Module with a Polishing Cloth
Friday, August 18th, 2017
Roland TR-909 Analog Drum Machine Blue Lights Forat Refurb #28449
Friday, August 18th, 2017
Jack Board PCB 292-149 / Replacement Parts for Roland Juno-106S juno106S 
Friday, August 18th, 2017
Moog Mother-32 Semi Modular Synth Module with 3.5mm cables 12″ long and Cloth
Friday, August 18th, 2017
Moog Minimoog
Friday, August 18th, 2017
CPU Board PCB291-901 / Replacement Parts for Roland Juno-106 juno106 
Friday, August 18th, 2017
Creamware Minimax ASB Moog Minimoog clone Sound Synthesizer. Midi Module
Friday, August 18th, 2017
Moog Theremini : BRAND NEW : Etherwave : [DETROIT MODULAR]
Friday, August 18th, 2017