A Roland Juno 106 imitating an ARP 2600

YouTube via VintSynth.
"If you can not afford or find an ARP 2600, just jet your Roland Juno 106 do the job."

Korg Polysix demonstration

YouTube via VintSynth.

arp2600v arturia

YouTube via thommc.

Roland Jupiter 6

YouTube via actionbasic.
"I haven't seen much of the Jupiter 6 on YouTube or anywhere else so I figured why not. Here is a long clip for serious synthNerds. I tried to get as many sounds out of it as possible in 10min. Be kind. The sound is a bit erratic, but good overall."

Jupiter 6 Sweep Bass

YouTube via neutronemission.
"2 OSC using square and saw waves with filter modulated by LFO. There might be some sync going on in there as well."

Jupiter 4 Solo

YouTube via maisonvague.

"the roland jupiter-4 running through an electro-harmonix memory man delay"

Bob, Moog Little Phatty and Alesis Micron

flickr by Maggie Osterberg.

click here for the full size shot.

Title link takes you to more.

Caveman

via this auction.

Details:
"This is a homemade noise synth built by the seller. This monster features 4 oscillators with an oscillator mix knob for blending waves in and out of phase, 1 wave inverter/sync switch for the LFO, low pass filter, 1/4" output on the backside, and finally a labeled on/off toggle on top. This is built into a very cool retro "Caveman" video game case made by Tandy in the late 70's. It operates on 9 volt battery which is housed in the original battery compartment. Don't miss out on this one of a kind instrument, you'll never see one like this again. The sounds this unit puts out are perfect for noise, experimental, acid, gabber & glitch music. It's sounds can range from pounding rhythms, juicy wet bass tones, synthy LFO sweeps, and all sorts of bleeps, bloops, klangs, warbles etc. If you are using software or a sampler/sequencer this is a great source for building 8 - bit leads, acidy bass lines, hard kick drum sounds and other hit samples."

Sequential Circuits Prophet T8

Title link takes you to shots via this auction.

Note that in the last shot below those are not separate voice boards. That's one giant board. you can see the traces go through each voice section.

Details:
"This rare 8 voice (16 oscillator) synth has the latest 3.8 eprom update, as well as midi, polysequencer, polymod section, 76 note weighted action keyboard with attrack and release velocity, and aftertouch (polyphonic pressure). Same keyboard as used on the Synclavier. The T8 holds 120 patch/programs. It will split or layer programs or play all 16 oscillators in unison. This T8 was hard calibrated several years ago and autotunes perfectly in tune across the whole keyboard. Every key is pearly white (or black), sits even and works correctly with exception of one key which only needs counter weight adjustment. This one key does work completely with respect to all functions like velocity, AT, RV. There are slight variations in response between keys which is typical for the T8."

Doepfer Cwejman Livewire Plan B

Title link takes you to shots via this auction.

Details:
"-Doepfer A-100P(1200mA) Grey Portable Case with 115v power supply and power boards.
-Cwejman VCO-2RM Dual Oscillator --- 2 VCOs, Ring Mod, FM etc... Great sound Oscillators and ringmod!!
-Plan B Model 12 MK1 State Variable Vactrol Filter---gritty sound!!
-Livewire Dual Cyclotron --- Multiple uses, but I used it as an LFO where I could make my own waveforms!!
-Livewire Frequen Steiner---- One of my favorite filters of all time!!! can be gritty and laserific!!
-Doepfer A-105 VCF SSM 24dB Low Pass Filter---- think Prophet 5 Rev.2!!
-Doepfer A-106-1 Xtreme Filter VCF Lowpass/Highpass---- the MS-20 clone!!!
-Doepfer A-111 VCO 2 High End VCO---- Uses a CEM 3340 Curtis chip!!!
-Doepfer A-112 Sampler VC Sampler/Wavetable Osc.---- save samples via midi, great digital Osc.!!!
-Doepfer A-188-1 BBD Module 4096 stages---- great delays, chorus and Karplus synthesis possibilities!!!
-Doepfer A-131 Exponential VCA
-Doepfer A-138 B Exponential Mixer
-Doepfer A-180 Multiple
-Doepfer A-140 ADSR Envelope Generator"