The best replacement for 2 speakers is 6x9.

The best alternatives to 2 speakers are rated as following:
★★★★★  6x9
★★  5 1/4

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Speaking about 2 speakers, one probably shouldn't forget about 5.1 receiver.

Other search terms related to 2 speakers and their ratings are:
★★★★★ 5.1 receiver
★★ 7.1 receiver
You have in mind a companion for 2 speakers and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of 2 speakers in all years. Click on graph for more.
2 speakers
6x9
5 1/4