Jeff Rowland

03-07-15: Kijanki
Ricred1, I stated 22% loudness increase, but it would be true for 2x loudness. I forgot that bridging doubles the output voltage, thus quadruples the power. In such case you can count on (substantial) 49% loudness increase. Speaker's minimum impedance remains the problem.

L=k^(1/3.5) where L=loudness, k=ratio of power.

L=4^(1/3.5)=1.49

Kijanki, that's not true over the entire amp power range, correct? it will be true for a small power output range until the amp runs into its max current capability. So, we'll see a 4X the power just for that small power output range.

when the amp output voltage doubles so does the current. So, you have 2X voltage & 2X the current & an increased heat dissipation (& maybe even amplifier catastrophic destruction).
Or, am i thinking of this incorrectly? Thanks.

always look up to Mr. Rowland.. (He's very, very tall :)

indeed he is. I met him at the 2013 RMAF - on Sat he was running the demos himself in the afternoon (had the 525 amp driving the Raidho stand mounts which were crazy priced). I'm tall but no comparison to Jeff Rowland himself....

Almarg,
Speakers are as follows:
the rear of the speakers are 4' 2" from the front wall
8' apart, 4' 8" from sidewalls, I sit 10'away, my head is 6'away from the rear wall
I have 2 GIK Soffit Bass traps in each front corner from floor to ceiling, 6 GIK 242 panels-2 each on the left and right at the first reflection points and 2 on the ceiling

Stringreen,
I just had a discussion yesterday with a friend regarding adding a sub. The thought was to add a JL F112. Unfortunately it would cost more than I currently want to spend...I don't have a preamp; therefore I would need to purchase the JL F112 and preamp. In addition, I never really liked subs. Years ago I had an Martin Logan Depth i and a HSU sub. Neither one blended well with the speakers I had at the time.

Jeff is a very nice man and makes time for less fortunate people. He is not a personal friend. I just have seen him at some dealers and have been to his company with other retailers and got to see his operations and visit with him at times. So I know of him. I am not a retailer and never have been. I have just got to enjoy others in this hobby. Jeff also has a great ear for what is natural. I think very highly of his electronics. I have been on the look out for a long time for something from him and just havn't done it because of cost. But hopefully someday.

But for Ricred. I don't know if this will help or not. I use a buffer after my passive attenuator and it does fill out the bottom end in a very nice way and does not leave anything negetive to speak of. I don't know how this would work out for you. What I have is a Burson AB160. It is made with quality discrete components. I think that may be why it seems like it doesn't have a sound signature of it own yet fills the sound out. What I think I mean is it doesn't seem to lose any transparency yet it makes everything sound more full or complete. I have always liked the less is more plan. It has always worked out well. So I was somewhat surprised that this buffer was such a benefit for my system. Chris Johnson of the Parts Conexion(former Sonic Frontiers owner)said this Burson AB 160 was the cadillac of buffers. For whatever that is worth. And that happens to be what the Burson sales stuff says it is suppose to do. And suprise it seemed to meet up to that for me.

That being said they don't make them any more. And I don't want to give mine up for almost anything I have heard(6 preamps)under 8000.00. Sometimes they have shown up used. Burson may have a better replacement for it. I don't know how it could be much better but I have been wrong before. Anyway just a thought.