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Chip Amps Amplifiers based on integrated circuits

In-Speaker Amp and Power
In-Speaker Amp and Power
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Old 2nd July 2009, 07:19 PM   #1
evanlivingston is offline evanlivingston  United States
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Default In-Speaker Amp and Power

Hi,

I have a pair of JBL 4301 powered broadcast monitors and one of the amps went out. I'd like to replace the amps on both speakers. The speakers require around 50-80 watts to run. I'd like to put the power supply and amps inside of the speaker enclosure and I'm not sure if these gainclone power supplies would cause problems. The enclosure are sort of small, their only 8" drivers .I am also unsure as to which chip is best for me. I appreciate any help or advice.

Evan Livingston
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Old 3rd July 2009, 12:20 PM   #2
AndrewT is offline AndrewT  Scotland
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if you put the amplifiers and their power supplies inside the speaker box, how does the heat get out?
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Old 3rd July 2009, 02:07 PM   #3
star882 is offline star882  United States
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Modern digitals run cool enough that heat is not much of a problem.
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"Fully on MOSFET = closed switch, Fully off MOSFET = open switch, Half on MOSFET = poor imitation of Tiffany Yep." - also applies to IGBTs!
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Old 3rd July 2009, 10:04 PM   #4
wazzy is offline wazzy  Zimbabwe
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you could use a 'plate amp' design with an external heatsink. have done this myself a few time and it works pretty well.
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Old 4th July 2009, 01:28 PM   #5
valleyman is offline valleyman  United Kingdom
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Like he said....

Worked a treat
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