In-Speaker Amp and Power

evanlivingston · 2nd July 2009, 08:19 PM

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

AndrewT · 3rd July 2009, 01:20 PM

if you put the amplifiers and their power supplies inside the speaker box, how does the heat get out?

star882 · 3rd July 2009, 03:07 PM

Modern digitals run cool enough that heat is not much of a problem.

wazzy · 3rd July 2009, 11:04 PM

you could use a 'plate amp' design with an external heatsink. have done this myself a few time and it works pretty well.

valleyman · 4th July 2009, 02:28 PM

Like he said....

Worked a treat

2nd July 2009, 08:19 PM	#1
evanlivingston diyAudio Member Join Date: Jul 2009	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

3rd July 2009, 01:20 PM	#2
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	if you put the amplifiers and their power supplies inside the speaker box, how does the heat get out? __________________ regards Andrew T.

3rd July 2009, 03:07 PM	#3
star882 diyAudio Member Join Date: Mar 2007	Modern digitals run cool enough that heat is not much of a problem. __________________ "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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3rd July 2009, 11:04 PM	#4
wazzy diyAudio Member Join Date: Sep 2007	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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