Would the AST allow settings for the centre speaker as well as others ?

My AST on BV7 Mk3 is disabled

AST allows to finetune speakers.

Center is the reference. Center is in default and cannot be changed, but all others. ....when I remember correctly.

You may download the AST user /reference Guide in the B&O download section.

To enable AST, you just can enable on the menu. If your menu doesn't show up AST, you have to install the latest SW update.

B&O recommends a Beo5/6, but it works with the Beo4 also.

The setup can be done with Beo4 easy.

To change a profile manually, it is not so easy as with Beo5/6. But in fact it is usually not necessary to change a profile, since you define a default for Video and another default for Audio.

Go for it. You can always disable it.

 I have a Beo 4 and 5 , not sure how much the software update would cost to get the AST enabled and whether the functions would benefit in light of what richu says about the centre speaker.

Maybe a cheaper solution would be another amp like onkyo as some of you are using but then you end up with cluttering with third party devices.

Chris wrote:

Hi there, some advice please.

I have a Beovision 7-40 Mk3 with a Beolab 7.4, driving a pair of front Beolab 8000's and a Beolab 2. At the rear of what is a square are a pair of Beolab 6000's.

When i select speaker setup 4 i get all 4 main speakers working, with the 6000's which are normally relatively muted in surround mode 5, boxing above their weight and sounding fantastic. But in setup 4 i don't get the benefit of the 7.4. When i select mode 5 i get the 7.4 and the 8000's as usual but rather timid 6000's. I prefer listening to music in mode 4, but try and watch movies in 5 to ge the benefit of the 7.4. I always have to put the volume up in mode 5 to say 59 from 51 which i don't like doing.

In short how do i get the Beolab 7.4 to chip in when in speaker setup selection 4? 

I dont know how much my advice will help, as I don't own a B&O TV or speakers..... yet..

However, as I understand it your B&O TV has an inbuilt surround sound decoder/preamp, whereby you can select which combinations of speakers you wish to use.

I would assume that in your mode 5 seting, which is for DD movies etc, that you will have the option to send test tones (pink noise) to each individual speaker in turn, to balance them as regards levels, and also an input setting for loudspeaker to listening seat for distance, which will tell the decoder what delay to set for the different speaker distances from the listening seat, so the sound signals all arrive at the same time to your ears.

These days, most current AV receivers use a small supplied microphone, and the setting of levels and distances is done automatically.

However, you will have to do this manually, for which you need a tape measure, and an SPL level meter - Tandy/Radioshack one will do nicely.

The Dolby specs call for a test tone of 75db on all channels, OR you can also buy test DVD's to send the test tones, in which case the level is 85db.

Either way, once you have set your individual speaker to listening seat distances, run the test tones one at a time, with the SPL level meter preferably mounted on a tripod or similar, at the listening position, AND pointing the microphone up towards the celing.  You need to match each speaker so that they all will show 75db on the meter, assuming you are using the internal test tones, or 85db if using a calibration test CD/DVD.

Then you are done.  Note the volume setting that you are using on your B&O - this is your reference level.  By reference, Dolby specs call for 105Db C weighted PER Channel for reference playback levels.  For sound considerations, the test tones are - 30dB down, hence the 75db level.

105db is very loud in a home environment unless you are in a very large room; most AV enthusaists would listen around -6, -10, or even -15db below reference level.

The point of this excercise is that a SPL level meter and tape measure are both more accurate than guessing and IMV essential if you want the best results - differences of even 1db in the rear surround channels can spoil the effect, so you need to get it right.  Once done it is set unless you change things around re your placement of speakers etc, and it is not an onerous task to do.

Properly set up and calibrated, I would expect thrilling results from your system - it really is just a matter of calibrating it according to Dolby specs for movies -using the test tones that will be built into the inbuilt surround sound decoder, which are there as part of the licence requirements for a Dolby Digital surround sound encoder, as supplied by B&O or their OEM suppliers as regards the SS module.

Trust that this is of assistance

Kind Regard

John... 🙂