So this is the JBL Partybox Ultimate, its an insanely large speaker that gets super loud, it has very violent bass and it has an incredible looking light feature. However, it is big and it is pricy. But today we’re going to compare the Partybox Ultimate to two great options that are smaller, and more affordable. Now this isn’t an apples to apples comparison, but let see how the JBL Partybox Ultimate compares to both the Soundboks 4 and the Sony XB900.