Compatable Speakers

What is the best option for external speakers that you can really hear when played outside? Will the Altec Lansing (510 or 430) models charge the Clip? Any better suggestions? I bought some Radio Shack speakers for my husband’s Clip and they aren’t doing the job. I am not sure what version of firmware he has, but I know he hasn’t updated it (bought in December 07) since he didn’t know what I was talking about. Would updating the firmware give him the sound he is looking for. BTW, he loves the Clip and he didn’t even want an MP3 player. Now if he could just play it loud outside. Thanks.