My Reference Grade 2-Way Active Loudspeakers

[Flint]

WOW!!!

Do you have the waterfall plot?

How about compression data?

I didn't bother with those charts, but I can easily make the power compression measurements. I'll do that soon enough and post the results.

To do accurate waterfall measurements of the speakers, I'll have to take them outside for a free field measurement session, which is a harder task. Maybe someday I'll do it. I did get a new measurement package, so it might be fun to practice using it.

 

[heeman]

I didn't bother with those charts, but I can easily make the power compression measurements. I'll do that soon enough and post the results.

To do accurate waterfall measurements of the speakers, I'll have to take them outside for a free field measurement session, which is a harder task. Maybe someday I'll do it. I did get a new measurement package, so it might be fun to practice using it.

Just curious what it looks like in your treated room.

 

[Flint]

These are in my drum room, while treated to make the drums sound good, it isn't treated for stereo listening. So, it would just be whatever it happens to be.

But, I'll look into it.

 

[heeman]

These are in my drum room, while treated to make the drums sound good, it isn't treated for stereo listening. So, it would just be whatever it happens to be.

But, I'll look into it.

Not that important. .

Better things to spend your time on!

 

[yromj]

Very cool read! The attention to detail throughout is most impressive to me. BRAVO!

John

 

[Flint]

This afternoon I measured the bass dynamics performance of these speakers in the room, both together, at 0.2W, 2W, 20W, and 200W (I had to use a different amp to get the 200W measurement).

As you can see, the frequency response shows little to no dynamic compression in this condition. This is the result of 1) using an extremely good and larger than typical 2-way woofer, 2) designing a transiently ideal enclosure (volume and tuning), 3) building the enclosure with almost no losses, and, 4) placing them in a good location in a room.

This is not a common outcome, because there are lots of trade-offs in things like cost, time spend in the shop building such a seriously braced speaker, and building multiple prototype boxes to ensure ideal loading.

Now, if I could only find a better application for them than sitting in my drum room where I mostly use them to play songs I am learning on Guitar or Drums, or because my office is adjacent, listening to background music or the radio while working.

 

[heeman]

This afternoon I measured the bass dynamics performance of these speakers in the room, both together, at 0.2W, 2W, 20W, and 200W (I had to use a different amp to get the 200W measurement).

As you can see, the frequency response shows little to no dynamic compression in this condition. This is the result of 1) using an extremely good and larger than typical 2-way woofer, 2) designing a transiently ideal enclosure (volume and tuning), 3) building the enclosure with almost no losses, and, 4) placing them in a good location in a room.

This is not a common outcome, because there are lots of trade-offs in things like cost, time spend in the shop building such a seriously braced speaker, and building multiple prototype boxes to ensure ideal loading.

Now, if I could only find a better application for them than sitting in my drum room where I mostly use them to play songs I am learning on Guitar or Drums, or because my office is adjacent, listening to background music or the radio while working.

View attachment 12780

Impressive.....

Is that 1/6th smoothing?

 

[Flint]

1/12th in this case.