tc300
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A test by a Russian web site shows that REF4.80 is very clean amplifier, and somewhat under rated. They measured 4x110watts at 4ohms and 4x180watts at 2ohms. This means 2x360watts at 4ohms if bridged. This is at 1% THD with a 14.4volt battery. Channel separation is >70dB and THD and noise are also very low. The fuse ratings back these tests.
Unfortunately, this line had been discountinued. I was lucky to be able to pick up a REF4.80 for $120 shipped about 4 months ago. I use this amplifier to run my 2-way quasi-active front stage, HAT Imagine 6.5 speakers. The amplifier is mounted in the trunk on a board attached to the back seat. I can't complain about it. This car had a crappy Jensen amplifier previously. The difference is quite notable. This most important thing is that alternator whine is completely gone. The sound is very dynamic and clean. I am very happy. I have had only a minor issue with it so far. Last week I was on a long road trip to New Mexico, with the trunk completely filled with luggage, with bags touching the amplifier heatsink and mostly shutting off air circulation in the trunk. The amplifier went into protect mode after about 15 minutes of play time. I don't really think this is the amplifier's problem. This is a high power Class A/B amplifier, so it needs a respective amount of air circulation, possibly even forced if you use it to power a subwoofer. I will not block the air flow to this amplifier again, but if it goes into protect mode gain, I might relocate it some place where it's mounted horizontally.
Unfortunately, this line had been discountinued. I was lucky to be able to pick up a REF4.80 for $120 shipped about 4 months ago. I use this amplifier to run my 2-way quasi-active front stage, HAT Imagine 6.5 speakers. The amplifier is mounted in the trunk on a board attached to the back seat. I can't complain about it. This car had a crappy Jensen amplifier previously. The difference is quite notable. This most important thing is that alternator whine is completely gone. The sound is very dynamic and clean. I am very happy. I have had only a minor issue with it so far. Last week I was on a long road trip to New Mexico, with the trunk completely filled with luggage, with bags touching the amplifier heatsink and mostly shutting off air circulation in the trunk. The amplifier went into protect mode after about 15 minutes of play time. I don't really think this is the amplifier's problem. This is a high power Class A/B amplifier, so it needs a respective amount of air circulation, possibly even forced if you use it to power a subwoofer. I will not block the air flow to this amplifier again, but if it goes into protect mode gain, I might relocate it some place where it's mounted horizontally.
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