My amp gets warm...

Jye · 21st November 2003, 03:08 AM

Hi everyone,

I’ve just finished my latest project a sonosub, which I am totally happy about

, but the amp remains warm when it is on standby. The amps a 350W from Jaycar and I would like to know if this is common, or should I be trying to get a replacement

.

For those how would like to know am using a Peerless 12” XLS, two 100mm ports 670mm in length and the volume of the sonotube is 112L. I’ve been breaking the driver in over the past few days and will then play around with the port length a bit. And for a bit of extra weight to reduce vibrations the inner top and bottom have been lined with 20kg a lead. I’ve posted a few more pics on my web page (which is more of just a photo gallery).

Cheers

speekergeek · 21st November 2003, 05:04 AM

I have a parts express 250 watter and it stays pretty warm when on standby too. i think it is the transfrmer or something.

The Paulinator · 21st November 2003, 06:09 AM

Yeah, I have a 150 watt I pulled from a Radio Shack sub and it does the same.

Is that enclosure lined with felt or something? That sure is sharp looking! Kudos!

Volenti · 21st November 2003, 06:27 AM

With the amp on standby you still have current idling through the transformer, which is where the heat that you feel is coming from.

autoexec · 21st November 2003, 08:08 PM

where do you get the cylinder wood
hardware store, or is it more of a specialty thing

Jye · 21st November 2003, 10:17 PM

Thanks guys, I knew there would still be current flowing through the transformer but I had no idea it would create that much heat

.

Cheers

Jye · 21st November 2003, 11:53 PM

Hi Autoexec,

The tube is called Formatube (or Sonotube in the USA) and is used for casting concrete. The below link has heaps of examples,

http://members.tripod.com/~terrycthe...um/page12.html

As for a supplier the only place in Brisbane is Boral, but before I found that out I rang EVERYONE.

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21st November 2003, 05:04 AM	#2
speekergeek diyAudio Member Join Date: Oct 2003 Location: santa rosa	I have a parts express 250 watter and it stays pretty warm when on standby too. i think it is the transfrmer or something.

21st November 2003, 06:09 AM	#3
The Paulinator diyAudio Member Join Date: Jan 2002 Location: Spfld, OR	Yeah, I have a 150 watt I pulled from a Radio Shack sub and it does the same. Is that enclosure lined with felt or something? That sure is sharp looking! Kudos!

21st November 2003, 06:27 AM	#4
Volenti diyAudio Member Join Date: Aug 2003 Location: Australia	With the amp on standby you still have current idling through the transformer, which is where the heat that you feel is coming from.

21st November 2003, 08:08 PM	#5
autoexec diyAudio Member Join Date: Oct 2003 Location: Maroubra, Sydney, Australia	where do you get the cylinder wood hardware store, or is it more of a specialty thing

21st November 2003, 10:17 PM	#6
Jye diyAudio Member Join Date: Aug 2003 Location: Brisbane, Australia	Thanks guys, I knew there would still be current flowing through the transformer but I had no idea it would create that much heat . Cheers

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