We do not recommend modifying the connector on the back of the speaker as it yes will void your warranty, you may also alter the sonic performance of the speaker enclosure itself. The wires for the Eris 4.5 are solder tipped to prolong the life of the stranded copper wires at the end of the cables. The speaker-connector assembly should not wear out as it's metal against metal, the solder tipped cable will assist with a better connection. If you cut the cables to length, the cables should be tinned with solder to prolong the life of the cable ends. If you want a better connector than bare wire, consider moving up to another model speaker such as Eris 5 which feature RCA, 1/4" and XLR input connectors.