Razlaw wrote:
Beoboiinoz wrote:
Personally, I don't like using bandwidth compromised speakers as rears, as you loose the stereo effect of low bass in the rear, with it all being sent either to the fronts, or to a sub at the front of the room. However, I also appreciate that for price and space considerations, this is a compromise many of us have to make.
Based on that, would you recommend four Beolab 9s instead of Beolab 5s in front and Beolab 9s in the rear?
I did not know there was a reason, or standard, to have all the same, but I do like the symmetry four 9s would provide.
Notwithstanding that everyone has given you excellent advice
Speaking personally, I would have four Lab 5's all round if it was feasible - putting aide room issues others have mentioned, for a no compromise approach.
Failing that, I would have two Lab 5's in front, and two Lab 9's as rears.
The reason is, that yes, the Lab 9's would cross over the very low bass to the Lab 5's.
However, depending upon what the factory has deemed ideal re a crossover point for that speaker combination, as would be preset in the logic table for bass management in your surround sound processor, the cross-over point may be considerably lower than 80hz, to optimise the Lab 9's as much as possible. Certainly you would in all likelihood hear much more low bass from the stereo rears with Lab 9's than with Lab 3's for instance - both in terms of bandwidth and amplitude.
The other very important advantage IMV to using Lab 5's as fronts, over Lab 9's is that they each contain what could be argued to be a state of the art subwoofer thrown in 'for free'.
In all high end movie setups I've ever heard, or read about, stereo subs are de-riguer.
It's true that the .1 or LFE channel of a 5.1 or 7.1 setup is mono, as it is also true that it can go exceedingly low, to around 10hz or so. This is to provide true infrasonics, where you don't so much hear, as feel the sound, to give an atmosphere of menace etc in a movie, or to create suspense etc.
The heavy hitters in the high end audio world as regards subs at the top tier of performance for movies, include the likes of the JL Audio Fathom F13, the Velodyne DD18 etc, and it is fair to say that the Lab 5's are one of the truly few high end loudspeakers that can compete with these industry heavyweights when it comes to bass ability as regards extension into true infrasonics, played at very low distortion and with the amplitude levels required for Dolby specs.
A Beolab 2, whilst a very good sub, simply is not in the same performance league as the 15' drivers in the Lab 5's, or the afore mentioned JL Audio Fathom and Velodyne in this regard.
Also, as well as the ultra low frequency .LFE effects, very low bass, such as around 20hz or so, will play in stereo, rather than mono, which would be the case if you were to couple a Beolab 2 with Lab 9's at the front for instance, so as to add extra depth and reach in the sound to cater for LFE.
Whilst you may not readily hear frequencies around 20hz, there is ample documented evidence to show that stereo low bass, over mono low bass, offers a very worthwhile gain in reproducing the ambiance from halls, and the recording venue etc, and with it the sense of air and space in the sound.
And for music use, as well as movies, the Lab 5's will offer the best of both worlds, that a Lab 9 in conjunction with a Lab 2, effecitvely cant.
On one hand the Lab 2 won't do LFE anywhere near as effecitvely as the Lab 5s, and for music the Lab 5 will give you bass reach and extension that only the Lab 2 could hope to match to some degree - yet it is not as clean re a fast transient response in the low bass like the Lab 9, which in turn doesn't have the low bass reach/extension of the Lab 5.
Really, if money is not the question, and there is sufficient physical space, I could see no reason NOT to go with a Lab 5 solution for the fronts.
After all, they are B&O's current best loudspeaker, and arguablly one of the finest available in the world.
If I had the money, I'd buy them in a heartbeat, and certainly would heartily recommend them in your situation for the reasons I've attempted to outline; hopefully with clarity and in a manner that assists rather than confuses.
I hope this helps in some way... 😕
Kind Regards
John... 😐