Andrew Jones MoFi Speakers

[Beave]

I imagine because the off-axis curves are individually taken manually. Also, realistically, most dispersion problems like a directivity mismatch in the forward radiating sound would be visible within the 120° slice measured.

When I wrote "the usual +/- 90 degrees," I was referring to Stereophile's usual measurements for bookshelf speakers, ie, they usually measure out to 90 degrees but didn't in this case. It makes comparing the graphs with other speakers they have measured a little difficult as the scales aren't the same.

 

[thewas]

The measurements have just been posted on-line at https://www.stereophile.com/content/mofi-electronics-sourcepoint-10-loudspeaker-measurements

John Atkinson
Technical Editor, Stereophile

Thank you, with that very wide radiation and slow on-axis tilted highs I expect that it can sound quite bright in many rooms as also your listening position measurement shows

Fig.6 MoFi SourcePoint 10, spatially averaged, 1/6-octave response in JA's listening room (red) and of the Mission 770 (blue).

but it seems you didn't perceive it as much as you also expected

"The combination of the MoFi SourcePoint 10's slightly rising on-axis response and its wide dispersion results in an in-room behavior that I would have expected to sound bright. Yet, its tonal balance wasn't so much bright as clean and extended in the top octaves."

Hope I can hear it one day at a dealer or an audio show as such makes me really curious.

 

[John Atkinson]

Why do the Stereophile measurements for off-axis response only go out to +/- 60 degrees horizontally, instead of the usual +/- 90 degrees?

For various reasons, I had to do the quasi-anechoic MLSSA tests of the SourcePoint10 in my listening room, which is smaller than the room where I usually measure speakers. The geometry of the room meant that I had to limit the measurements to ±60° off-axis.

John Atkinson
Technical Editor, Stereophile

 

[LTig]

The measurements have just been posted on-line at https://www.stereophile.com/content/mofi-electronics-sourcepoint-10-loudspeaker-measurements

John Atkinson
Technical Editor, Stereophile

Fantastic dispersion and sensitivity, and a little EQ to tame the highs might be all to get very good SQ from a decently priced passive speaker. I wonder though what more would be possible with an active design using a DSP crossover ...

 

[Mr. Widget]

Fantastic dispersion and sensitivity, and a little EQ to tame the highs might be all to get very good SQ from a decently priced passive speaker. I wonder though what more would be possible with an active design using a DSP crossover ...

My thoughts exactly.
Might even be worth voiding the warranty and bypassing the passive crossover.

 

[Beave]

For various reasons, I had to do the quasi-anechoic MLSSA tests of the SourcePoint10 in my listening room, which is smaller than the room where I usually measure speakers. The geometry of the room meant that I had to limit the measurements to ±60° off-axis.

John Atkinson
Technical Editor, Stereophile

Thank you for the explanation.

 

[fredoamigo]

I have to admit that I was a bit dubious while waiting to see some measures.
Even if it's not perfection, I'm impressed by the work of Andrew Jones who, let's not forget it, started here from a blank sheet of paper with a new concept... so bravo !

 

[Sal1950]

BTW, I'm almost proud of the fact that I have managed to avoid hearing the Cowboy Junkie's Trinity Sessions. I hope I can make it to the grave without doing so.

If you ever have trouble falling asleep, that track can work a treat.

 

[Sancus]

Looks like it has the usual tweeter diffraction problems of non-Kef/Genelec coaxials. Meh.

 

[3125b]

Looks like it has the usual tweeter diffraction problems of non-Kef/Genelec coaxials. Meh.

Indeed, a hard sell since they are more expensive than KEF R11 over here.

 

[mhardy6647]

Even if it's not perfection, I'm impressed by the work of Andrew Jones who, let's not forget it, started here from a blank sheet of paper with a new concept... so bravo !

Oh, I'll bet he had the work of folks like Hilliard and Olson in the back of his mind (and whether he knew it or not).

 

[VintageFlanker]

I had very low expectation that the SourcePoint would be available in EU anytime soon...

... Yet, it is finally announced to be imported, at least in Germany, for some 5000€ MSRP.

SourcePoint 10: First Speakers from MoFi

With the two-way standmount speaker "SourcePoint 10" – developed by Andrew Jones –, the phono experts from MoFi present their first own loudspeaker.

stereo-magazine.com

I'll pass.

 

[thewas]

For various reasons, I had to do the quasi-anechoic MLSSA tests of the SourcePoint10 in my listening room, which is smaller than the room where I usually measure speakers. The geometry of the room meant that I had to limit the measurements to ±60° off-axis.

Just out of curiosity, why don't you rotate the loudspeaker instead of moving the microphone?

 

[John Atkinson]

Just out of curiosity, why don't you rotate the loudspeaker instead of moving the microphone?

I do one or the other, depending on the proximity of the room boundaries. A week ago I had to measure the Klipsch La Scala in the writer's room for a review to appear in the April issue of Stereophile. At 201lb the speaker was too heavy for me to lift on to a dolly so it could be rotated, so I moved the microphone instead. Using a large protractor and a laser pointer, I marked a series of mike positions at the required distance at 5 degree intervals.

But given my druthers, I place the speaker on an Outline computer-controlled turntable, aim it along the measurement room's diagonal, and rotate it up to 90 degrees off-axis. (I raise the speaker so that that the tweeter is midway between the floor and the ceiling, which moves the first reflection to about 4ms after the arrival of the sound at the microphone.)

The Klipsch, BTW, had the second-highest voltage sensitivity I have encountered - an extraordinary 101.3dB(B)/2.83V/m!!!!

John Atkinson
Technical Editor, Stereophile

 

[thewas]

I do one or the other, depending on the proximity of the room boundaries. A week ago I had to measure the Klipsch La Scala in the writer's room for a review to appear in the April issue of Stereophile. At 201lb the speaker was too heavy for me to lift on to a dolly so it could be rotated, so I moved the microphone instead. Using a large protractor and a laser pointer, I marked a series of mike positions at the required distance at 5 degree intervals.

But given my druthers, I place the speaker on an Outline computer-controlled turntable, aim it along the measurement room's diagonal, and rotate it up to 90 degrees off-axis. (I raise the speaker so that that the tweeter is midway between the floor and the ceiling, which moves the first reflection to about 4ms after the arrival of the sound at the microphone.)

The Klipsch, BTW, had the second-highest voltage sensitivity I have encountered - an extraordinary 101.3dB(B)/2.83V/m!!!!

John Atkinson
Technical Editor, Stereophile

Thank you very much for your detailed and interesting reply, really appreciated as generally your valued contribution to Stereophile and the audio press, wish all other magazines had people like you.

 

[Sal1950]

I'm finding it amazing the money being spent on the advertising for the SourcePoint10's.
Full back page ad's on Stereophile for the last 2 months and 2 or 3 places inside.
Same - same everywhere you look, very surprising for a relatively inexpensive speaker.
I wonder if MoFi is hoping to sell enough to make up a bit for losses do to the digital-vinyl scandal ? ROTFL

 

[thewas]

Same - same everywhere you look, very surprising for a relatively inexpensive speaker.

Wouldn't call a 5000€ passive 2-way standmount inexpensive, there should be large margins for marketing tools inside.

 

[Sal1950]

Wouldn't call a 5000€ passive 2-way standmount inexpensive, there should be large margins for marketing tools inside.

Fully agree,
But I did say "relatively" LOL

 

[cavedriver]

Apologies if someone already shared this but it appears Mofi has added a white paper on the speaker's design written by Andrew Jones:

https://www.mofielectronics.com/s/SourcePoint-10-White-Paper-11-10-22.pdf

 

[Sal1950]

Apologies if someone already shared this but it appears Mofi has added a white paper on the speaker's design written by Andrew Jones:

https://www.mofielectronics.com/s/SourcePoint-10-White-Paper-11-10-22.pdf

Ohhh, a "while paper" they must be really serious. LOL