Tom Oberheim SEM Pro

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"Oberheim SEM Pro Synthesizer Expander Module Features at a Glance:

True analog synthesis from Oberheim - a sound that has helped shape modern music
MIDI to CV module opens up new possibilities in the studio as well as live
Rugged, durable design gives you the confidence to make the SEM Pro part of your live rig
External audio inputs make the SEM Pro a powerful processing tool
Personally autographed by Tom Oberheim

The Oberheim SEM Pro Synthesizer Expander Module is an instant synth classic."

Tom Oberheim SEM-PRO semi modular synth SN 056

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Noisebug (RSS)

"The Tom Oberheim Synthesizer Expander Module Pro version, (SEM-PRO), incorporates twenty-one minijacks for signal access to the primary patchpoints in the sonic flow along with the MIDI-to-CV converter.

Each of the SEM-PRO instruments will be personally signed by Tom Oberheim.

Specifications:
SEM with MIDI to CV Converter and integrated patch panel. This version of the SEM combines the features of the MIDI to CV version with a 21-jack CV patch panel and is personally autographed by Tom Oberheim. 21 SEM connections are brought out to 3.5mm minijacks. The basic connections are a one-volt-per-octave VCO control voltage and a standard 0 to +5 volt gate signal.

This version includes a high precision MIDI to CV Converter that has been specifically designed to allow MIDI to control the SEM, and has additional features that make use of the SEM's external inputs. Some of the features of the MIDI to CV Converter are:

* Select MIDI channel, controller number and bend range
* Select note assignment modes: latest, high note and low note priorities
* Select note re-trigger, filter track, LFO reset
* A second independent control bus allows velocity, controller data, or channel pressure to modulate either or both VCOs, the filter and the VCA
* Transpose function allows different keyboard controllers to utilize the complete MIDI note range
* Analog portamento
* Input preamp gain control - allows an external audio input to be processed thru the SEM
* High precision A-440 Hz tune signal
* Control voltages and gate are bought out to rear panel connectors so MIDI to CV function can be used with other CV/Gate gear."

Tom Oberheim SEM Pro Synthesizer Expander Module

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Noisebug (RSS)

"Manufacturer Description:
The Tom Oberheim Synthesizer Expander Module Pro version, (SEM-PRO), incorporates twenty-one minijacks for signal access to the primary patchpoints in the sonic flow along with the MIDI-to-CV converter.

Each of the SEM-PRO instruments will be personally signed by Tom Oberheim.

Specifications:
SEM with MIDI to CV Converter and integrated patch panel. This version of the SEM combines the features of the MIDI to CV version with a 21-jack CV patch panel and is personally autographed by Tom Oberheim. 21 SEM connections are brought out to 3.5mm minijacks. The basic connections are a one-volt-per-octave VCO control voltage and a standard 0 to +5 volt gate signal.

This version includes a high precision MIDI to CV Converter that has been specifically designed to allow MIDI to control the SEM, and has additional features that make use of the SEM's external inputs. Some of the features of the MIDI to CV Converter are:

* Select MIDI channel, controller number and bend range
* Select note assignment modes: latest, high note and low note priorities
* Select note re-trigger, filter track, LFO reset
* A second independent control bus allows velocity, controller data, or channel pressure to modulate either or both VCOs, the filter and the VCA
* Transpose function allows different keyboard controllers to utilize the complete MIDI note range
* Analog portamento
* Input preamp gain control - allows an external audio input to be processed thru the SEM
* High precision A-440 Hz tune signal
* Control voltages and gate are bought out to rear panel connectors so MIDI to CV function can be used with other CV/Gate gear."

Tom Oberheim Signed SEM Pro SN 0673 Semi Modular Analog Synthesizer Synth

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"Oberheim SEM Pro Patch Panel Synthesizer. Comes with original box, packaging, manual & paperwork, unopened patch cables and power supply. This an awesome warm analog synth and it's signed by Tom Oberheim...

'SEM-PRO. SEM with MIDI to CV Converter and integrated Patchpanel. This version combines the features of the MIDI to CV version (see below) with a 21-jack patchpanel and is personally autographed by me.

Select MIDI channel, controller number and bend range
Select note assignment modes: latest, high note and low note priorities
Select note re-trigger, filter track, LFO reset
A second independent control bus allows velocity, controller data, or channel pressure to modulate either or both VCOs, the filter and the VCA
Transpose function allows different keyboard controllers to utilize the complete MIDI note range
Analog portamento
Input preamp gain control - allows an external audio input to be processed thru the SEM
High precision A-440 Hz tune signal
Control voltages and gate are bought out to rear panel connectors so MIDI to CV function can be used with other CV/Gate gear.'"

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Signed Tom Oberheim SEM Pro SN 0555 with Original Box

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"For sale is a mint in box Oberheim SEM Pro. Comes with all original packaging, cables, and documentation. This is a reissue of the classic VCO mono synth and is signed by Tom Oberheim himself. The unit can also function as a midi-cv converter."

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Tom Oberheim 4 OBERHEIM SEM Pro MIDI to CV Model (4 units)

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SNs 599, 0580, 0743, & 0274.

"Here are four (4) OBERHEIM SEM Pros, MIDI to CV models. I'm selling them together as a set, perhaps for someone who wants to create an Oberheim 4-voice synth with them.

They are all hand-signed by Tom Oberheim with an actual Sharpie Marker, and not silk-screened signed as the last models produced were.

They are in pristine, mint condition, work perfectly and sound amazing."

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Oberheim SEM Pro Analog Synthesizer With Modular Patch Panel SN 0772

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Interesting that the auction mentions Marion Systems which was Tom Oberheim's last synth company.

"Marion Systems SEM-Pro synthesizer expander module, signed by Tom Oberheim. This is the version with built in MIDI to CV convertor and the full modular patch panel."

There is no mention of Marion Systems on http://tomoberheim.com, but it would be interesting if his previous Marion Systems was the parent company.

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Oberheim SEM Pro CV/Gate/Midi SN 0414

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"Up for auction is a brand new SEM Pro synth module, limited edition model, signed by Tom Oberheim. These were hand-assembled by Tom Oberheim, the synth designer legend. Killer deal and $200 off the new price with free shipping in the USA."

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Tom Oberheim Two Voice Pro Dual Analog Synthesizer with Sequencer 2016

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Oberheim Two Voice Pro - TVS Pro 2017

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"This Tom Oberheim TVS-Pro -- or Two Voice Pro-- is in immaculate condition with no issues whatsoever.

It has been professionally used in my synth studio since being brand new in 2017. I'm the original owner. Both SEM's tune perfectly and hold well through hours of use. As you can see, the patch panel really expands the capabilities allowing you to route velocity to different places for example.

Tom Oberheim himself said these were made from the exact same schematics and electronic parts values from the originals. While I haven't tried this myself, apparently an original SEM from the 70's can work if you swap them out. I have used it mostly in "dual mono" mode for the world's best stereo mono synth lines. Duplicating the settings on both SEM's make this a huge stereo sound since each SEM is analog and slightly different. It is in my top 5 synths of all time.

There are less than 250 of these in existence and perhaps the best version of a Two Voice.

It has the final firmware updates: Keyboard v24a and Seq v30 from 2018"

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Tom Oberheim TVS-Pro

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"Legendary synth designer Tom Oberheim created a current rendition of his classic SEM (Synthesizer Expander Module). The SEM, Tom’s first synthesizer, was well loved for its beautiful sound and just the right combination of synthesis modules and patching in a compact, portable package. In fact it was so revered that people requested Tom make the SEM again, so he did. Consisting of a 100% analog signal path through two oscillators, two envelope generators, and filters, the SEM is an exceptionally massive sound design module. This Oberheim Two Voice Pro features two of Tom's renowned SEM's, along with a 3-octave, velocity sensitive keyboard, a mini sequencer with 16 steps, and up to 56 mini-jack patch points for each module."

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Oberheim SEM Pro MIDI SN 0413 Semi Modular CV ANALOG Synth

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"This version combines the features of the MIDI to CV version (see below) with a 21-jack patchpanel and is personally autographed by creator Tom Oberheim. Select MIDI channel, controller number and bend range Select note assignment modes: latest, high note and low note priorities Select note re-trigger, filter track, LFO reset A second independent control bus allows velocity, controller data, or channel pressure to modulate either or both VCOs, the filter and the VCA Transpose function allows different keyboard controllers to utilize the complete MIDI note range Analog portamento Input preamp gain control - allows an external audio input to be processed thru the SEM High precision A-440 Hz tune signal Control voltages and gate are bought out to rear panel connectors so MIDI to CV function can be used with other CV/Gate gear. The U.S. price is $1199 for new, buy this one instead and save hundreds and get all the awesome Oberheim sound you deserve. Includes original power supply, manual, warranty card, box and packing material. And of course, synth-god Tom Oberheim's signature. Additional 12 ft MIDI cable as a bonus."

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Oberheim SEM PRO MIDI/PATCH PANEL SN 0332

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"This is the newer Oberheim SEM PRO with a Patchpanel and MIDI and Tom Oberheim's signature. Is completely mint no marks anywhere, works and sounds great. Comes with manual..."

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Oberheim SEM Patch Panel SN 0097 w/ Original Box

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"Tom Oberheim SEM patch panel. THIS is the version for full integration into modular systems: extensive patchbay allows CV/gate control as well as output of a wide array of the SEM's controls. No MIDI! Features additional patch points not available in the SEM pro version.

Earlier version with better quality knobs: later models with the Marion Corp logo ("M") on top don't have the classic Oberheim dials anymore.

Technically fully functional. Very good cosmetic condition. Some marks and light scratches, particularly on edges and back & front panels.

Comes with original box & switchable PSU 110-240V, EU plug."

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Oberheim TVS Pro

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"This black Tom Oberheim TVS-Pro -- or Two Voice Pro-- is in immaculate condition with no issues whatsoever.
Both SEM's tune perfectly and hold well through hours of use. As you can see, the patch panel really expands the capabilities allowing you to route velocity to different places for example.

Tom Oberheim himself said these were made from the exact same schematics and electronic parts values from the originals. While I haven't tried this myself, apparently an original SEM from the 70's can work if you swap them out.
I have used it mostly in "dual mono" mode for the world's best stereo mono synth lines. Duplicating the settings on both SEM's make this a huge stereo sound since each SEM is analog and slightly different. It is in my top 5 synths of all time.

There are less than 100 of these in existence and perhaps the best version of a Two Voice.
This one has been used in my non-smoking studio professionally since 2016, with no issues whatsoever.
It has the final firmware updates: Keyboard v24a and Seq v30 from 2018
It will come with original manual, and power cable."

Oberheim SEM Pro CV/Gate/Midi

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"new SEM Pro synth module, limited edition, signed by Tom Oberheim on the front. This is brand new unit, purchased 3 weeks ago from ROBOTSPEAK in San Francisco and still in the original box with the manual and power cord. This is the uber-deluxe "PRO" version that gives you the benefit of both MIDI and full CV/GATE connectivity..."

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Tom Oberheim SEM Pro SN 0765

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"The SEM reissue by Tom Oberheim. This version comes with midi and cv patchpoints.

Minor scratches on the rear (see photo) but otherwise in an excellent condition."

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Tom Oberheim SEM Pro SN 0554

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"Bought it used , the synth looked like it had lived, the signature almost gone, side scratch, after a year owning the filter knob wasn’t working the same, I sent it to Tom Oberheim himself to fixed it! I have email proof,so this synth is solid."

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Tom Oberheim SEM Pro SN 0613

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"Original signature by Tom Oberheim on the front (later units come with a printed signature).

Complete set:
switchable PSU 110-240V (adapter with US plug – easy to replace with EU / UK etc connectors)
manual
documentation card for MIDI-CV interface
original box."

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TOM OBERHEIM SEM PRO Analog Synthesizer SN 0697

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This post just came in after the last one featuring the SEM PRO & SH-101. Funny how that happens. Things just randomly come in and now and then they line up.

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