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<blockquote data-quote="zako" data-source="post: 7658684" data-attributes="member: 629735">Unfortunately, they got discontinued so it&#039;s pretty hard to find them now. If you google for it,&nbsp; sometimes an odd vendor has them, but not always this cheap. I got mine from dpcauto.com. It looks like they don&#039;t have the REF4.80 any more. However, they still have the weaker REF4.50 for $72.50 plus shipping. I assume, by translation, that REF4.50 is also somewhat underrated, maybe by 20-30%. Given the size and its specs, it&#039;s still a good value. If that&#039;s not enough power, you could buy something like MB Quart ONX4.125. However, the REF4 was about half of its size.In my view, a lot of the newer MB Quart amps are not what they used to be. My preference for the &quot;budget&quot; amplifiers is now PPI. Their Phantom, Power Class, Sedona, and Black Ice are all excellent amplifiers for their respective class. I know that based on tests the first three do their rated power with the Power Class being the cleanest, highest end amp in the line. Black Ice is relatively new, so there is no test data or user feedback on it yet. It is about to hit vendors in a few weeks. It&#039;s supposedly based on a decent existing Soundstream board/design, so it&#039;s expected to be a good amp line too.</blockquote>

[QUOTE="zako, post: 7658684, member: 629735"] Unfortunately, they got discontinued so it's pretty hard to find them now. If you google for it, sometimes an odd vendor has them, but not always this cheap. I got mine from dpcauto.com. It looks like they don't have the REF4.80 any more. However, they still have the weaker REF4.50 for $72.50 plus shipping. I assume, by translation, that REF4.50 is also somewhat underrated, maybe by 20-30%. Given the size and its specs, it's still a good value. If that's not enough power, you could buy something like MB Quart ONX4.125. However, the REF4 was about half of its size. In my view, a lot of the newer MB Quart amps are not what they used to be. My preference for the "budget" amplifiers is now PPI. Their Phantom, Power Class, Sedona, and Black Ice are all excellent amplifiers for their respective class. I know that based on tests the first three do their rated power with the Power Class being the cleanest, highest end amp in the line. Black Ice is relatively new, so there is no test data or user feedback on it yet. It is about to hit vendors in a few weeks. It's supposedly based on a decent existing Soundstream board/design, so it's expected to be a good amp line too. [/QUOTE]

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