Steelphon S900 (Version 1)

Extremely rare monophonic analog synth with 2 oscillators and 2 noise generators. Has the Moog ladder filter. See below...

Select Currency

You missed it!


Extremely rare monophonic analog synth with 2 oscillators and 2 noise generators. Has the Moog ladder filter. See below for a demo of one of these instruments.

Brokerage sale – see below the video demo for more information on how this works. Photos supplied by the seller – please ask if you need other photos or information.

The Steelphon synths were made in Italy in the early 70s – an S900 was used by David Bowie on the Berlin trilogy and he even used one on Italian TV (video of that is below).

Excellent condition and perfect working order.

NOTE: because this item is a brokerage sale the shipping is only an estimate as shipping will be arranged between the seller and buyer. If you want an exact figure before you purchase please get in touch. In the event that you purchase and have overpaid on the shipping we will refund the difference.

Here’s Thomas Heckman demonstrating one of these synths:

And here’s that video of Bowie on TV – Steelphon appears at about 1:27:


Brokerage Sale Information:

This is a brokerage sale by Soundgas on behalf of the owner. The synth is not at Soundgas and we have not (sadly) had a chance to assess/play it ourselves. As such, we can offer no guarantee on this item beyond the 14 days you have to assess it. However, we only work in this way with trusted clients who really understand their gear. That said, it is the buyer’s responsibility to confirm details provided in the listing by the seller are to their satisfaction – if you have any questions at all please let us know before we arrange shipping.

As a brokerage sale, payment will be made to us but will be held in escrow for the seller until the buyer confirms satisfactory receipt of the item. The buyer has 14 days from receipt to raise any concerns, after which we will release funds to the seller. Full terms available on request.


The Weird and the Wonderful – An Auction Update

The Weird and the Wonderful – An Auction Update

We can't stop here, this is bat country! Our next auction (November 22nd) features some head-turning, show-stopping synths, however we also wanted to put the spotlight...

PUBLISHED: 21st Nov 2023

Teaching Machines Wellspring Reverb Review

Teaching Machines Wellspring Reverb Review

Tony takes a dive into the new Welsh-made Wellspring Stereo Reverb and comes up with a very big smile on his face.

PUBLISHED: 17th Oct 2023



We stand behind our gear with a guarantee of your satisfaction - see the FAQ section above for full details and buy with complete confidence.


When buying more than one item you only pay the shipping on the item with the highest shipping cost. Calculated automatically at checkout.


Get in touch via the contact page. We know & love our gear and we want to ensure you get something that matches your needs (that, and we just like talking gear).

Select your currency