GoodSoundClub - Romy the Cat's Audio Site

In the Forum: Horn-Loaded Speakers
In the Thread: Macondo’s lowest channel.

Post Subject: An absolute must for ULF channel.Posted by Romy the Cat on: 6/11/2011

This for someone who do not use ULF might be considered as superfluous but I am going to tell you that that for me, the person who use ULF dally, it is an absolutely mandatory tool. The ULF channels have to have a good calibrate dB meter that in real time will show the strength of the ULF signal. My B2 amp has very good miter and I am telling you: it is very useful to use them. You will not HEAR the sound of good ULF channel. With a LOT of experience of ULF use you might get some feeling HOW ULF perform in context of entire system but only with very much know to you “calibrated” recordings. With good real time dB meter you will learn what your room/playback need and you can very fine tune (with precision of 1dB) what your ULF does. Being spoiled with B2’s meter I can not imagine how I will use ULF without them.

In my case, where I have right and left channels different filters to track the ULF level would be very hard but with meters on it is very simple and very accurate. In fact to tune the ULF with meters and different filters is always like conducting of orchestra – you can set volume and character of Sound by different filters differently. The conductor right hand usually manages beat. This is my 3th order filter – it sets the volume of the ULF and decay, aka the tempo of the entire presentation. The conductor’s left hand is all about the cue character, phrasing, dynamics, and small expressions. This is my 4^th order filter – it fill the space of my 3th order filter but it adds some very fine infliction of the ULF phrasing. Since the different filters are in fact different ULF channels then need to work all together not only with each other but with the rest of the system. It will be VERY hard to set properly but listening the playback and looking what objectively ULF do I have become a master of ULF tuning just after a few days. Now, knowing HOW ULF shall sound I can just looking at the meters with 5 seconds very precisely tune ULF of my playback. VERY comfortable!!!

Rgs, Romy the Cat

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