top of page

Solder & Supplies

Quad Solder

Description: A proprietary blend of copper, silver, tin, and lead.


Proprietary as in "please don't ask for the recipe because we're not telling."

No other solder flows as well, solidifies as uniformly, sounds as good or provides as durable and long lasting solder joints. There's a reason Quad Eutectic is considered the best in audio, and is widely used outside of our industry as well.

Quad Eutectic Solder was developed in the early days of Cardas Audio when George Cardas realized that the available solders on the market - from hardware store grade to expensive silver-heavy solders - all had shortcomings that lead to degradation in sound quality. He worked with an English metallurgist to arrive at the perfect blend of elements. 

Quad Eutectic Solder has a rosin core, and has a melting point of 350º F (177º C). Available on 1/4 pound and 1 pound spools.

For soldering tips, check out our video series "Soldering With Jesus", starring our head-terminator Jesus Ornelas.  

Part numbers:

P41.6 for 1 pound spool

P41.7 fo 1/4 pound spool

Bar Solder

Used in solder pots to tin Litz wire, we offer both leaded and lead-free bar solder.

Leaded bar solder contains tin & lead, and has a melting point of 360º F (177º C). This is the same bar solder we use in the solder pots at Cardas Audio. Available in 2 pound bars.

Lead-free bar solder contains tin & copper, and has a melting point of 440º F (227º C). Available in 1 pound bars.

For soldering tips, check out our video series "Soldering With Jesus", starring our head-terminator Jesus Ornelas. 

Part numbers:

P41.1 for 2 pound leaded bar solder

P41.1 for 1 pound lead-free bar solder


Cardas Rosin Flux Solder Paste aids in the transfer of heat to help solder flow between conductor and connector.


Along with Cardas Bar Solder and Quad Eutectic Solder, this flux is used for terminating cables at Cardas Audio.

Part number:

P41.3 for 2 oz container

Contact Conditioner

Cardas contact conditioner is a contact enhancer. Use in small quantities to both enhance and lubricate connections. Apply with a small brush or Q-tip to only the conductive surface. Do not apply to any non conductive components. Not for use on power cable connectors.

Part number:

P50.2 for 3 milliliter bottle

bottom of page