The Workbench

Re: BeoMaster 4400 channel balance

Webu — Fri, 25 Dec 2009 09:00:59 GMT

Oh yes!

The multimeter test showed 0.044V for the left channel and 0.054V for the right channel playing a 1kHz sine wave MP3 with volume at 1, balance at 0 and loudness on. I used an old 2-3m speaker cable to meter though, but of course that shouldn't have any effect when I just move the connector between the channels.

I've got to set the balance slider to around -1,1 or -1,2 to get them both at 0.044V - hmm.. Let me try with different frequencies and a bit higher volume as well

Edit: Well most interestingly noticed that pushing down the mono switch makes the difference like half smaller - otherwise different frequencies and volumes were acting quite much as you could supposed, as well as loudness and linear switches (loudness seemd to have a very minor effect on the lower frequency balance though, but nothing more than that apart from the normal level boost).

Re: BeoMaster 4400 channel balance

Dillen — Fri, 25 Dec 2009 08:30:19 GMT

A signal generator and a power (watt-)meter would be nice.
I use B&O TG7 and RWM4 but others will work just as well.
A multimeter on AC volts put across the speaker output and a steady and continous
test signal of f.e. 1KHz sinewave on an input will surely be adequate
to at least give you an idea.

Martin

Re: BeoMaster 4400 channel balance

Webu — Fri, 25 Dec 2009 07:30:35 GMT

Many thanks for your replies

Hmm, I tried going through the switches a bit, but I couldn't really notice anything this time - also moving to the second speaker outputs sounded pretty identical to me (first time by the way) But yes, swapping the left and right channels does make a difference - it sounds more balanced and better having them reversed

I've got to admit that I might be a bit confused by myself now as well, but shouldn't that mean one of the channels is getting more power than the other one? Would I be able to measure the output with a multimeter just to be sure?

My current speaker placement isn't too optimal - that's why I'm scared if there used to be a slight problem with the other channel which just got normalized again, but I'm thinking it the wrong way now as I might already got used to it before

Regards, Jouni

Re: BeoMaster 4400 channel balance

Dillen — Thu, 24 Dec 2009 16:24:12 GMT

I agree on the switches. Especially the ones that are only rarely used. Work them all a bit.
Swap the speakers first to make sure that the problem is not with one of them.

Martin

Re: BeoMaster 4400 channel balance

lausvi — Thu, 24 Dec 2009 16:20:35 GMT

I have no experience on 4400 but I have a BM3000 which can't be that much different. Usually the switches on the front panel get oxidized and cause one channel to mute or go down in volume. In my BM3000 I found especially the MONO L / R, LOW / HIGH FILTER and LOUDNESS switches to cause lost channels. Does the 4400 have a TEST -switch at the rear panel? That have caused me troubles as well.

Season greetings from not-so-far-away

BeoMaster 4400 channel balance

Webu — Thu, 24 Dec 2009 14:33:42 GMT

Christmas greetings,

Yesterday I was turning up the volume a bit on the BM4400 when something happened: the balance seemd to get more on the right speaker and bass response kind of smoother on the lower end (sounds pretty nice though). I had to set the balance slider to -2 to make it sound quite balanced again - has anyone experience such a thing before?

I've done the Dillen's cap and trimmer kit last summer, so they should be alright - but might there be something else ageing or possibly in need of a little inspection?

Kind regards, Jouni