Want a dual SID solution which can swap your SID model with a flick of a switch?

Want to be able to switch between 6581 and 8580 to play/hear all music/demos/games with the correct SID chip?

We present you: Project SIDFX

Just flick the hardware switch to force SID1 or SID2 or put it in auto and let the software decide.

No soldering required!

Get your existing SID out of the socket, insert the SID into SIDFX or replace it with any one or two other SIDs you might have. No jumper settings, just connect 4 cables to the unit.

Top features of the SIDFX unit

Advanced configuration tool

You can customize 3 configuration profiles which can be selected using “switch 2” (one of the cables that comes with the unit).

The configuration tool for SIDFX allows you to set single or stereo-mode, memory-space, specify digi-boost for 8580 and more.

Made with love for SID

Switch while playing music from one SID to the other, using “switch 1” (one of the cables that comes with the unit).

SIDFX was created so that future SID players can detect which SID models are mounted in the two sockets and set the correct model, if the SID player knows the preferred model for the tune it's playing.

Plug-in'N'Play - No jumpers!

Take any two functioning SID models and put them into any combination in the two sockets on the SIDFX unit.

The unit will auto-detect the models and set the voltages and filter-capacitors accordingly, so your SIDs are safe with SIDFX.

No soldering required

You don't need to solder anything, SIDFX comes as a complete product with 4 cables ready to be attached to the unit.

These are 2 switch cables for manual selections, a mini-jack cable for direct audio-output and a cable with grabbers to allow stereo addressing.

Product variants

SIDFX with standard cable length

Default for C64 breadbins, C64C and C128 chassis.

575 DKK incl. VAT (around €78) [*]
460 DKK excl. VAT (around €62)

SIDFX with extended length cables

This is for usage with SX-64, C128D and C128DCR.

600 DKK incl. VAT (around €81) [*]
480 DKK excl. VAT (around €65)

SIDFX + cables + SIDFX adapter

Use with Reloaded MK1 boards in C64C chassis

650 DKK incl. VAT (around €88) [*]
520 DKK excl. VAT (around €71)

Shipping costs

All prices are excluding shipping.

  • Standard orders: 80 DKK (around €11) including tracking for most countries.
  • Small orders: 50 DKK (around €7) without tracking. Only valid for low value orders up to 100g (e.g. accessories and spare parts).
  • We may offer/suggest alternate shipping rates/services depending on order size and/or destination country

[*] EU customers will be charged VAT

Lotus Electronics ApS is a Danish company and by law required to apply Danish VAT, which is 25% and applicable to all non-commercial customers located in the European Union. Customers outside EU won’t be charged VAT, but the shipment might become subject to import taxes in your country.

Manufacturing of batch 2 is complete so we now have plenty of available stock!

Thanks to everyone who has shown interest by signing up on the wish list.

By exclusively accepting PayPal payments in our local currency DKK (Danish Kroner) we have been able to almost maintain the previous price level (only around €2 to €3 increase) even though this second batch size is much smaller and the component and manufacturing costs have generally increased.

Do you wish to purchase a SIDFX unit? Then please go to the wishlist and sign yourself up. You will receive a PayPal invoice from us within 24-48 hours. We aim to ship your order within 5 business days after receiving your payment.