Cambridge Audio A3i - Strange Sound on Input - 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 5th December 2007, 02:22 PM   #1
diyAudio Member
Join Date: May 2005
Location: Hertfordshire
Send a message via MSN to carl.stock
Unhappy Cambridge Audio A3i - Strange Sound on Input


I do post, but I tend to do so in reply to others, so I believe this is my first thread.

I have a Cambridge Audio A3i amplifier, which is great. It’s an eBay item, but it has now failed.

The problem seems to centre on the inputs, most notably the CD one. The sound seems out of phase, and it’s as if virtually all of the voices have been somehow stripped out! The effect is like listening to an instrumental version of a song! The other inputs – I’ve only tried the Video one so far, as well as the CD one – seem somewhat weak in terms of output, though the sound does not seem quite right. However, that could just be me.

So, basically, the Video input seems to be fine, although it requires the volume to be turned up more than usual to get a decent amount of sound.

The seller says he used the CD input without any problems, as well as others, without any problems. He also says he has owned other hi-fi equipment (Musical Fidelity, for example).

What could the problem be with this amp? They’re lovely amps – I know x-pro (Alex) on here designed it – but I am afraid I do not have the necessary experience to fix it. It was actually sold to me as fully working, but it is not, and I have only had it a few days after it arrived from an eBay seller with 100% feedback. The seller has refused to issue a refund, so I am having to follow this up with eBay and PayPal, and so the amp may have to be handed back. If not, I will be left without any means of repairing it.

I really like this amplifier because I have hearing problems relating to my neurological condition, so certain sounds can make me feel unwell, and it suits me betters than any other amplifier I’ve tried, so I am trying to get more of these amps when I can find them on eBay, but this is the only one I have, and it does not work, and my hi-fi setup is in tatters, really. I really like music when I am well enough to listen to it, but I still do not have the amp I need.

If anyone could suggest anything, I would be very grateful. I know about the internal LEDs being useful for diagnosis, but I am not sure how relevant they would be in this case. Also, although I have my parents to help me, much of their time is taken up looking after me, so it’s not always easy to get the time to open things up like this – and it’s incredibly heavy, so I’ll blame Alex for that!

The relays seem to be fine, and there is no hiss. However, I have noticed the source select switch seems rather stiff as it gets to the CD position, so I am wondering if this is a mechanical problem, perhaps? I have tried ‘exercising’ it (turning it a few times), but I do not wish to have anything done to it without any guidance. It was not damaged in transit, and it was incredibly well packed – the best I’ve ever seen – and in great condition.

Many thanks for your help.


  Reply With Quote
Old 6th December 2007, 02:19 AM   #2
anatech is offline anatech  Canada
diyAudio Moderator
anatech's Avatar
Join Date: Jun 2004
Location: Georgetown, On
Hi Carl,
Sounds as though you have lost your input ground. Look to see if "audiophile" RCA connectors were used. You will need to unplug all inputs and measure between the shields to the others and phono ground (if there is one).

"Just because you can, doesn't mean you should" © my Wife
  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
strange sound from my Threshold SA3 sometimes Tino Pass Labs 6 1st May 2009 01:54 AM
strange input/turn on problem benlebow Car Audio 30 16th December 2008 11:17 PM
Strange Input on my AMP Cxrazy Car Audio 1 16th December 2007 10:01 AM
Cambridge Audio 640C No audio output PLEASE HELP! Kajman Digital Source 3 10th December 2007 09:45 AM
strange sound iceman Solid State 13 9th September 2003 02:46 PM

New To Site? Need Help?

All times are GMT. The time now is 01:20 AM.

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