Rotel RMB1048 110V 230V conversion - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Solid State Talk all about solid state amplification.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 26th February 2008, 07:58 PM   #1
diyAudio Member
Join Date: Feb 2008
Question Rotel RMB1048 110V 230V conversion

HI there,

I purchased a Rotel RMB1048 amp from the US and live in south africa where the voltage is 230V. I see there are jumpers inside the amp label labled 110V and 230V. At present the 110V jumper is soldered in.

Can I just remove this jumper and solder it into the 230V position to convert the amplifier?

Any Ideas would really help.

  Reply With Quote
Old 27th February 2008, 03:34 AM   #2
diyAudio Member
Join Date: Nov 2006
I know you can on older Rotels. I had the same dilemma except I had one set for 230v and I needed 120v so I just changed the jumpers. Just dont forget to change the fuse accordingly. Cheers
  Reply With Quote
Old 27th February 2008, 05:57 PM   #3
diyAudio Member
Join Date: Feb 2008
Default Rotel RMB1048 110V to 220V

Thanks for the reply.

I moved the jumper to the 230V position and powered the amp.

For my own safety I put a 250V/2.5A fuse in the cable suppyling the power to the amp.

This fuse blew immediately. The transformer tests ok so do damage has been done.

Could itbe that the amp draws more than 2.5Amp on power up.

I noted that the amp has a 10amp fuse wire in series with the power switch and thus am tempted to put in a larger fuse.

Any ideas

  Reply With Quote
Old 27th February 2008, 07:27 PM   #4
diyAudio Member
Join Date: Apr 2004
The fuse rating should generally be half what it was for 110V. You might be best using the series lightbulb trick to make sure there is no damage to the amp.

If the amp truly does support 110/230V there will be at least 3, possibly 4 sets of primary wires from the transformer. If there are only 2, it doesnt support it.
  Reply With Quote
Old 4th March 2008, 08:20 PM   #5
diyAudio Member
Join Date: Feb 2008
Default Rotel RMB 1048 110 to 230v convertion


Rotel were very help full and gave instructions on how the conversion should be done.

In addition to moving an internal jumper to 230V there are a couple of wires that must be swopped around. I think these are on the primary side of the transformer.

Seeing that I did not do the second part the amp is damaged and I have to take it in for repair.

Thanks for the suggestions anyway. In future get instructions from the manufacturer before attempting anything.

  Reply With Quote
Old 4th March 2008, 10:06 PM   #6
diyAudio Member
Join Date: Apr 2004
Ouch. Thats a silly design if you ask me.

The damage could well make the amp a write off Im afraid :/
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Convert 230v Breville juicer to 110v newb Everything Else 11 10th January 2009 06:33 AM
Convert 110v to 230v input ? istari knight Digital Line Level 6 1st January 2009 07:41 PM
Clean 110V from 230V jkeny Power Supplies 7 26th January 2008 11:26 PM
Mesa Boogie 110V=>230V metalmaster Instruments and Amps 14 15th March 2007 10:29 PM
120V QSC PLX 230v conversion??? bOOgy77 Class D 1 5th December 2004 07:25 PM

New To Site? Need Help?

All times are GMT. The time now is 04:54 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2