Your best bet would be to purchase speakers for your Dell
Inspiron Mini through Dell.com since your Mini is a Dell product
and you want the best quality. Dell.com has external speakers for
under $20 on their website for the Dell Inspiron Mini.
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No, there wasn't a Dell Inspiron 1390. The is a Dell 1390 Mini
Card 802.11 b/g, which is a wireless card.