Subwoofer

Thanks ditusa...

Very good article that seems to detail and explain well my own bad experience with a SINGLE subs added to my system... I sold it because i was not prepared for this task at all ... :) In the mean time i learned room acoustic and i discovered why connecting a single subs is a bad idea most of the times if done without any help....

Now my headphone goes under 30 hertz i dont need subs...

This article is very good :

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Understand that the largest percentage of all audio issues is room acoustics. You cannot put a great speaker in a marble shower stall and expect it to sound good - it will sound like a speaker in a marble shower stall. Room acoustics itself is a very complex set of interactions of physics and perception.

Sadly, there are many instances where manufacturers or individuals skew the relevant terms and confuse people. For example, beware of (and be aware of) the dangerous term "Room Tuning". You CANNOT tune a room using an "equalizer". You are tuning THE SOUND SYSTEM with the equalizer - the room is still the same. REAL room tuning means anything from sticking pillows in the corners to rebuilding the room (perhaps correctly) from scratch, incorporating a set of acoustic devices and parameters which sometimes seem nebulous but get a desired result. Because of this nebulosity of all the acoustics terminology (not to mention the international differences in measuring techniques, terminology, and ’scales’, which are substantial) it is often difficult for an end user (and many audio professionals, for that matter) to be able to mentally visualize just what a room without standing waves will sound like, or a room which is so rolled off that the high frequencies seem to "fall to the floor". »

What he wrote is so true, understanding it i rejected the idea of using an electronical equalizer first and instead designed my own room MECHANICAL tuning... First i used passive treatment with a balance between diffusion/reflection/absorption... After I created my audio room with one hundred Helmholtz resonators tuned incrementally on 6 months period around my listening position and the speakers ... I called that : "a mechanical equalizer"... The results were stunning.... No speakers at any price can beat the room...And a good room easily beat most of the times any speakers at any price in a non dedicated room...

By the way half of the issues and problems with headphones are related to the shell acoustic relation with the driver and the acoustic content of the shell or lack of...Something headphone marketing never adress, because to sell a product you dont point to the problems but to false solutions : improved driver with a thinner membrane for example... It is not enough to have a good driver, all my past 9 headphones had good drivers, none had acoustic content and device  in the shell/cup, save one... The only one i like... AKG K340...

I just upgraded from a GoldenEar ForceField 4 to a SVS SB-3000 in my setup.  There is a dramatic difference in depth of soundstage.The only way I can describe it is to say that it is like night and day. One subwoofer can be integrated into your system with a little effort in placement and level settings.  

Just got a Rythmic F12SE has lot of settings here. 12X16 room well treated. No BOOM crap here. It sounds pretty good at their default settings for starters.Fronts are Fritz Carrera Be’s. Amp is a CMII. One question though, use the variable or Fixed outputs on the amp? Using variable now so I can control the Sub volume from the sub mainly. Fills in the lower octave is what I’m after. Any suggestions on this Variable or Fixed. Please. Not placed yet but I hear no foreseeable problems making it good. I don’t have the room for 2.

Dear @jpwarren58  : The main issue could be not if you need one or two subwoofers.

The main issue is that your really good Ryan speakers are a two way design crossing at 2khz and even that maybe you don't know that same woofer/mid-range driver goes down at least to 35hz and : what does that means?.

It means that the speaker has a very high IMD that comes from its bass range notes/harmonics that puts alot of " trash/dust " to that part of mid-range sound. That woofer at the same time that's reproducing 40hz-50hz is reproducing frequencies not only at 2khz but even a little higher, so the woofer excursions goes and degrades the mid-range frequency with that developed high IMD and this is the main issue why you need not one but two subwoofers connected in a way that the Ryan handle all the frequencies over 90hz-100hz and the subs below that frequency crossover. 

In that way the low bass range will be reproduced by drivers designed to handled that critical low bass range ( in an audio home system MUSIC belongs to the bass range, as better this range as better what you are listening. ) and along dedicated amplifiers designed for that bass range. So now your mid-range will shines as never before and the HF too as the bass improved.

Btw, Dirac Live digital process can help you and any one else not only to integrates subs in any system but will improve everything in any home room/system.

Regards and ENJOY THE MUSIC NOT DISTORTIONS,

R.