What battery operated portable device do you use to play spec spots for a client? Your phone? Your phone with a BlueTooth speaker? A cassette player???
Use your phone or tablet, Mike.
I find the iphone/ipad speakers a little weak. I invested in a nice bluetooth speaker with good bass and I just bring that along when presenting spec spots. Just make sure you're spot is ready to play so you don't have to fumble around with the technology. I've learned that the hard way.