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PMC result6 Monitor Review

Rate this studio monitor:

  • 1. Poor (headless panther)

    Votes: 220 91.3%
  • 2. Not terrible (postman panther)

    Votes: 16 6.6%
  • 3. Fine (happy panther)

    Votes: 2 0.8%
  • 4. Great (golfing panther)

    Votes: 3 1.2%

  • Total voters
    241
Similar to getting your product on the shelf in a major store. Very difficult requiring substantial investment and if your not a major brand

But, I see SoS has very large catalogue of "product" reviews - Do they want one product to stand out significantly, or make certain all products are good enough so that all products can be considered worthy for purchase.
 
I can't recommend the PMC result6. It is an embarrassment for the company.
I never liked their smaller monitors - expensive HiFi speakers. Seems they got even worse.

Their big monitors live from the fabulous 3" midrange, these units sound fantastic. But the tweeter was already a cheap, old one and their transmission line was problematic in normal size studio rooms (e.g. their show room in my country, lf sounded pretty bad).

It's a lot of marketing and pride with PMC. They should rethink some of their orientations.
 
I never liked their smaller monitors - expensive HiFi speakers. Seems they got even worse.

Their big monitors live from the fabulous 3" midrange, these units sound fantastic. But the tweeter was already a cheap, old one and their transmission line was problematic in normal size studio rooms (e.g. their show room in my country, lf sounded pretty bad).

It's a lot of marketing and pride with PMC. They should rethink some of their orientations.
Exact, any speaker that uses that 3 inch midrange is going to have merit. This driver is the almost exact copy of the ATC driver. It was available for DIY at over 600€ a piece. I would pay 1000€ for a pair of the original ATC driver, but have had no luck in finding even one.
 
Exact, any speaker that uses that 3 inch midrange is going to have merit. This driver is the almost exact copy of the ATC driver. It was available for DIY at over 600€ a piece. I would pay 1000€ for a pair of the original ATC driver, but have had no luck in finding even one.
They use the Volt 3" as far as I know and these are available for DIY. But they are not as good as the ATC which they cross at 380Hz, the Volt you can buy now can't do that as far as I know.
But the BEST 3" are the Bliesma in my opinion! You can't cross them at 380Hz (440-500Hz depending on SPL level you need) but they are more superior in most other parameters. They should even go louder as they have a higher sensitivity and take a LOT of power.
 
They use the Volt 3" as far as I know and these are available for DIY. But they are not as good as the ATC which they cross at 380Hz, the Volt you can buy now can't do that as far as I know.
But the BEST 3" are the Bliesma in my opinion! You can't cross them at 380Hz (440-500Hz depending on SPL level you need) but they are more superior in most other parameters. They should even go louder as they have a higher sensitivity and take a LOT of power.
The Bliesma Silk and ATC and Neumann domes are all pretty much on par with each other w/r/t distortion/spl handling/response linearity; the Volt is OK but not spectacular in terms of its FR linearity but its distortion is just as good as those three.
 
Okay, I'm going to pose a question here:

How would you fix this without losing its good qualities? Its distortion at 86dB is quite good, all things considered - it stays below 3% down to 60hz. TLs can have substantially nice bass, IME - bigger PMCs extend deep but are surprisingly deft down there.

To me, fixing the crossover would be easy - some slight filter tweaks to raise the knee of the woofer slope to ~1.5-1.7khz and drop the tweeter to ~2.6khz and you've solved the crossover dip.

The TL, though... that might require some pretty significant redesigning. I think it could be done, but would require some serious time in Akabak or Hornresp to iron out its weirdness. I'd like to see a cross-section of the TL. My bet is that there's insufficient stuffing and not enough taper to knock ripple down to an acceptable level.
 
The TL, though... that might require some pretty significant redesigning. I think it could be done, but would require some serious time in Akabak or Hornresp to iron out its weirdness. I'd like to see a cross-section of the TL. My bet is that there's insufficient stuffing and not enough taper to knock ripple down to an acceptable level.
And even then the question remains what would be the objective advantages to a much simpler BR with similar tuning. I have the feeling a TL differs significantly only when its tuned like a "one note" resonator which is also the reason nowadays none of the best measuring loudspeakers use it. In the end the back wave energy of the driver is what it is, if you want to peak further for a region it you need to make a strong resonator which has disadvantages in time domain.
 
Use it in your favor then: make a studio monitor(s) better than awful PMC and then do just a tiny bit of lobbiyng with SoS. Done, a true win-win: people are happy with greater sound, SoS don't have to "lie" and a perfect future is guaranteed even for grandchildren of your grandchildren.
;)
Thankfully that has been done by a number of companies, some much larger than PMC. So no need for anyone here to jump into the market.
 
Okay, I'm going to pose a question here:

How would you fix this without losing its good qualities? Its distortion at 86dB is quite good, all things considered - it stays below 3% down to 60hz. TLs can have substantially nice bass, IME - bigger PMCs extend deep but are surprisingly deft down there.

To me, fixing the crossover would be easy - some slight filter tweaks to raise the knee of the woofer slope to ~1.5-1.7khz and drop the tweeter to ~2.6khz and you've solved the crossover dip.

The TL, though... that might require some pretty significant redesigning. I think it could be done, but would require some serious time in Akabak or Hornresp to iron out its weirdness. I'd like to see a cross-section of the TL. My bet is that there's insufficient stuffing and not enough taper to knock ripple down to an acceptable level.
So basically just redo the entire speaker other than driver selection and it would be good?
 
Okay, I'm going to pose a question here:

How would you fix this without losing its good qualities? Its distortion at 86dB is quite good, all things considered - it stays below 3% down to 60hz. TLs can have substantially nice bass, IME - bigger PMCs extend deep but are surprisingly deft down there.

To me, fixing the crossover would be easy - some slight filter tweaks to raise the knee of the woofer slope to ~1.5-1.7khz and drop the tweeter to ~2.6khz and you've solved the crossover dip.

The TL, though... that might require some pretty significant redesigning. I think it could be done, but would require some serious time in Akabak or Hornresp to iron out its weirdness. I'd like to see a cross-section of the TL. My bet is that there's insufficient stuffing and not enough taper to knock ripple down to an acceptable level.
What are its good qualities that need to be kept?

The 3% at 60Hz? Since this is a 6.5-inch speaker we need to compare it against other 6.5-inch speakers
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ELAC-DBR62-Harmonic-Distortion-86dB-1m.png


Well that's 3 speakers with below 3% or -30dB distortion, and the last one is within my budget, I think I'm going to stop finding more examples.

Edit: Might as well see how cheap we can go. ELAC Debut:
ELAC%20Debut%202.0%20B6.2%20Harmonic%20Distortion%20%2886dB%20%40%201m%29.png
 
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So basically just redo the entire speaker other than driver selection and it would be good?
No, the cabinet size and TL tuning can stay the same.
What are its good qualities that need to be kept?
Good (though not great) distortion, very wide dispersion (which some find preferable). TLs when done right also have some unique and pleasant (IMO) bass qualities.
And even then the question remains what would be the objective advantages to a much simpler BR with similar tuning. I have the feeling a TL differs significantly only when its tuned like a "one note" resonator which is also the reason nowadays none of the best measuring loudspeakers use it. In the end the back wave energy of the driver is what it is, if you want to peak further for a region it you need to make a strong resonator which has disadvantages in time domain.
I don't have a good answer for this. If done properly they IMO combine the better behaviors of port and sealed - this, to be sure, is neither.
 
If done properly they IMO combine the better behaviors of port and sealed - this, to be sure, is neither.
Do you have a technical article or comparative example showing such?
 
A TL should have very low turbulence noise compared to the typical BR port, simply due to the insane cross section. They are often tuned quite low which gives an extended bass shelf; something which can be duplicated with a typical port, but may worsen the turbulence issue again. A BR port might have tighter tuning than a TL (higher Q) which may result in higher impedance peaks in the bass range that require an amp with more voltage headroom.

IMO the TL is not the bad part of this speaker, it's everything else.
 
A TL should have very low turbulence noise compared to the typical BR port, simply due to the insane cross section. They are often tuned quite low which gives an extended bass shelf; something which can be duplicated with a typical port, but may worsen the turbulence issue again. A BR port might have tighter tuning than a TL (higher Q) which may result in higher impedance peaks in the bass range that require an amp with more voltage headroom.

IMO the TL is not the bad part of this speaker, it's everything else.
The TL is mostly just not done particularly well here. It seems to be the case across PMC's line until you get to the gargantuan ones (MB series and larger).
Do you have a technical article or comparative example showing such?
Not off the top of my head but the theory is that it shouldn't have the same kind of "driver in an open baffle" thing below Fb the way a port does because it's not working on the same principle as a helmholtz style port.
 
FIY: Transmission line works well but it requires a lot of cabinet size and that's impossible in smaller cabinets.

As for the frequency response, I've seen far worse response than this from other PMC speakers. This is actually good compared to that.
 
FIY: Transmission line works well but it requires a lot of cabinet size and that's impossible in smaller cabinets.
I have seen other smallish cabinet TLs work okay - Kerr K300s are alright AFAIK, though they're without a doubt doing a somewhat more advanced design with some pretty considerable tapering to try and clean up some of the interference pattern.

From SoS (only to 200hz, but that would reveal at least the upper end of a TL's strangeness):
Kerr_K300_04-jDYvVv6QfzRqc2Ge0FsEJyVgrl7n98xD.jpg



The crossover is clearly not tuned for flat on axis, of course.
 
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Yes showroom sound strikes again. Putting aside the hyperbolic statements about PMC et. al. not knowing a thing about acoustic engineering... they know quite well what they are doing and what sells speakers to the masses, even the professional masses.

I’ve mentioned this before, but the idea of
“ showroom sound” keep being brought up on this forum.

And it seems to lead to a puzzle:

The idea is that showroom sound tends to be a frequency response that hypes the high frequencies and often the low frequencies as well. Not necessarily always a “smile” EQ, but at least a frequency response that will tend to emphasize the sense of clarity and detail.

And then the idea is that it’s sort of like the Pepsi challenge (where the obviously sweeter taste compared to the less sweet taste wins out at least in short comparisons): The consumer listens to a B&W or whatever, here’s those emphasized highs as clarity and detail, and so when they compare that sound in the store to a more neutral speaker, the neutral speaker sounds less exciting and more dull. So they walk with the more exciting sounding speaker.

The problem there is that we are constantly told that in blind testing people actually prefer neutral sound.

So what’s going on then?

Why would people prefer showroom sound in the showroom, versus not in blind tests?

If showroom sound is a real effect, then why doesn’t it show up in blind testing where people prefer the showroom sound since they are often comparing speakers like B&W to neutral speakers?

Is it perhaps something that, like the Pepsi blind challenge effect, doesn’t hold up over time? And that in the blind testing studies for some reason, the effect fades?

I mean, if the showroom sculpting of the sound isn’t a thing, and doesn’t really work because people prefer a neutral sound, then what are these companies like B&W doing Insulting those frequency responses.
It would seem to be a total waste of time.
(except that they also seem to be selling lots of speakers doing it).
 
Why would people prefer showroom sound in the showroom, versus not in blind tests?
A) people are given a bit of time to acclimate.

B) It is a multi-way comparison. If 4 speakers are being tested and one has exaggerated highs, it is that one that stands out as being incorrect.
 
A) people are given a bit of time to acclimate.

B) It is a multi-way comparison. If 4 speakers are being tested and one has exaggerated highs, it is that one that stands out as being incorrect.

Interesting thank you.
 
So what’s going on then?

Why would people prefer showroom sound in the showroom, versus not in blind tests?
It's mostly that people hear top octave boost and a low mid scoop as "better" in a short term, non blinded test.
 
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