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Are amplifiers smaller than they used to be?

Old 12-04-2019, 06:22 AM
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Default Are amplifiers smaller than they used to be?

I haven't bought an amplifier in 15 years and I'm looking to add some to the boat. What I'm finding is that a modern 50x4 appears to be much smaller and cheaper than it's old counterpart. Right now, I have an old Kenwood 50x2 that's slightly larger than the modern 50x4 and the 4 channel version of my old amp was nearly 2x the size of the 2 channel.

I'm concerned because the size and price seem to have both reduced so I'm concerned that a modern 50x4 won't put out the same power as my old amp that I'm replacing.

Thanks
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Old 12-04-2019, 06:31 AM
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Yes, there has been more and more use of Class D amplification in recent years in new amp designs.
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Old 12-04-2019, 06:39 AM
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That makes sense... Especially in a marine amplifier where the reduced heat (higher efficiency) of a Class D amplifier would be a huge benefit in confined spaces.

Thanks.

Last edited by KC2OTE; 12-04-2019 at 08:48 AM.
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Old 12-04-2019, 07:24 AM
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Yes, the Class D amplifiers are smaller, generate less heat, and put out just as much. I replaced three Class A's that resulted in less power draw while providing the same wattage output. Because of the smaller size, I was able to reclaim some shelf space for other toys like the cell phone amp.
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Old 12-04-2019, 08:41 AM
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Stuff like this really concerns me.... I have this Pyle marine amplifier lying around that's 4"x3" and claims 100x2 RMS at 4ohms. I know it's a piece of crap amp which is why it's been sitting in my toolbox unused for a year but claims like this are just crazy. I'm planning either Kenwood or JL to go into the boat so at least I'll feel somewhat confident in the numbers.
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Old 12-04-2019, 12:10 PM
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I installed this amp with a pair of JL 8.8s and it has been rocking for about 3 months now with no issues what so ever. For the price and wattage output its hard to beat and has great reviews.
https://www.amazon.com/gp/product/B07NGTM4X7/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1 https://www.amazon.com/gp/product/B07NGTM4X7/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1
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Old 12-04-2019, 12:42 PM
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At 600 watts RMS for the 4-ch version the price is definitely right.... I was looking to spend about the same on a 50x4 so to get 175x4 it's probably worth looking into and even if the power output is exaggerated by 50% it's still going to be plenty of power for the 6.5 speakers I'm pushing, even when I add 4 more and drive it at 2ohm.
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