Radiant Acoustics Clarity 6.2 - Purifi based compact speaker

[jaakkopetteri]

Still, it's a two way, whereas the 420 is a three way. Amir doesn't measure IMD, but having a different driver handle bass means the mid driver doesn't have to contend with the IMD from producing bass. I have zero doubt that IMD is lower on the 420. I don't know at which volume level this becomes audible though.

I have plenty of doubt. The IMD on the Radiant is quite amazing below 600Hz and above 5kHz, and competitive in mids too. Plenty of 3-ways comparable to KH420 do worse

In the bass region, sure - I said midrange though.

Sure, my point was that the KH420 is slightly worse in mids and way worse in bass

 

[Mnyb]

I love these.

Banana only is a miss .

But note the absence of biwiring terminals thankyou thankyou .

 

[kharan]

I have plenty of doubt. The IMD on the Radiant is quite amazing below 600Hz and above 5kHz, and competitive in mids too. Plenty of 3-ways comparable to KH420 do worse

Sure, my point was that the KH420 is slightly worse in mids and way worse in bass

Between 2 and 4 kHz is the most sensitive range of the human ear, and if we extend a little, between 600 Hz and 5 kHz is a very sensitive range too.

That's why some speaker design try to place their crossover at the extremes of that range. Though that's probably not optimal for a number of driver sizes and their directivity.

 

[Vos]

Yup, if it measures the same, it'll sound the same. Measurement instruments go far beyond the limits of human hearing.

You don't need fancy cables. Sufficiently low resistance, capacitance and inductance such that any measureable (or calculated, the mathematics of impedance calculation is quite simple) difference the cable may make is below the threshold of human hearing. Capacitance has to be ridiculously high to be in any way significant relative to speaker impedance, inductance less so, but still has to be significant.

My speakers are wired with Canare 4S11 starquad. Left speaker, 3.8m long, resistance of 0.0342 Ω, inductance of 0.5 μH, capacitance of 537.4 pF. Right speaker 2.4 m long, resistance of 0.0216 Ω, inductance of 0.3 μH, capacitance of 323.7 pF. It costs about $10/m and when used properly, each pair has a CSA of 4.3 mm² ~11 AWG. The impedance of rhe cables is negligible compared to the speakers.

Internal speaker wiring is so short, provided it's of sufficient gauge, price per metre is irrelevant.

Decently made film caps are essentially all the same and will measure and perform the same.

Claims made by "High-end" manufacturers are just that. It's pure marketing with no foundation in science.

A lot of DIYers buy into the hype too. None of them do proper measurements or properly controlled blind listsning tests to really objectively test their beliefs.

People worry about tolerances of components - film cap tolerances are perfectly adequate and usually exceed the manufacturer's specification by a comfortable margin. Speaker drive unit tolerances are generally considerably worse. Unit to unit variation can seem quite significant, though in practice, from an audibility perspective, it's still nothing to worry about.

Intersting thread with a link to some proper manufacturer data on harmonic distortion figures for aluminium electrolytics:

Würth Elektronik ANP125 - Capacitors don’t cause any appreciable signal distortion

Würth Elektronik’s new Application Note ANP125 publishes the results of a study “The acoustic effects of harmonic distortion of aluminum electrolytic capacitors” on harmonic distortion of electrolytic capacitors. The result: Capacitors don’t cause any appreciable signal distortion. The...

www.audiosciencereview.com

And another thread here examining capacitor differences:

Audible difference in high-end capacitors? - ABX samples

As announced long ago the last part on the subject of audibility of capacitor upgrade in crossovers. The comparison ranges from a very cheap, decades-old film capacitor to an expensive high-end capacitor. As promised, this time there are short audio samples of each capacitor (in a simple...

www.audiosciencereview.com

I mostly agree but changing the standard Vishay capacitors/resistors to Panasonic/Claritycap/Mundorf in my amplifier made a massive difference in sound quality.

 

[gfinlays]

I agree mostly but changing the standard Vishay capacitors/resistors to Panasonic/Claritycap/Mundorf in my amplifier made a massive difference in sound quality.

And you compared them with properly conducted blind, level-matched listening tests?

No, you changed them, and based on your expectation bias, you convinced yourself that the amplifier sounded better.

Resistors and capacitors simply can't make a "massive" difference provided you changed with the same values with similar tolerances. Measurements show that any measurable difference (which of itself is very small) is significantly below the threshold of human hearing.

Did you read the other threads I linked to?

 

[Vos]

And you compared them with properly conducted blind, level-matched listening tests?

No, you changed them, and based on your expectation bias, you convinced yourself that the amplifier sounded better.

Resistors and capacitors simply can't make a "massive" difference provided you changed with the same values with similar tolerances. Measurements show that any measurable difference (which of itself is very small) is significantly below the threshold of human hearing.

Did you read the other threads I linked to?

Yes I compared them because if have two identical amps

 

[gfinlays]

Yes I compared them because if have two identical amps

Well that's something, but did you compare them blind and accurately level-matched?

 

[Vos]

Well that's something, but did you compare them blind and accurately level-matched?

The difference is actually quite big so your hear it immediately from the first note.
I upgraded the parts gradually, the sound difference was 99% created by changing the caps in the signal path to Panasonic + Claritycap.
Resistors (Mundorf) + larger caps power supply (Mundorf) + internal cabling didn´t bring any further noticable difference (only in my head = peace of mind haha)

 

[Norcal]

Can we get back on topic, pls, before this turns into dumpster fire?

 

[Mnyb]

Can we get back on topic, pls, before this turns into dumpster fire?

To prevent more dumpster fire .

Our member @ctrl has a wonderful series of articles about capacitors here is one of them . it has links to several others on the same topic.

Audible difference in high-end capacitors? - ABX samples

As announced long ago the last part on the subject of audibility of capacitor upgrade in crossovers. The comparison ranges from a very cheap, decades-old film capacitor to an expensive high-end capacitor. As promised, this time there are short audio samples of each capacitor (in a simple...

www.audiosciencereview.com

Lets get back on topic on these speakers

 

[ctbarker32]

Please share with people that will be attending this year's CAF 2024 in Rockville, MD this coming weekend.

More info can be found at the DCHFG website: https://dchifi.group/2024/11/03/dchfg-caf-2024/

 

[kharan]

All purifi... I don't see a Purifi tweeter there

 

[Penelinfi]

All purifi... I don't see a Purifi tweeter there

It says all _PURFI_ . Whatever that means lol

 

[ctbarker32]

I apologize for the dropped "I" in Purifi. here is the corrected flyer. More info at: https://dchifi.group/2024/11/03/dchfg-caf-2024/

 

[Mister.Mole]

[...] The front baffle is 28 mm bonded with the 15 mm aluminum baffle. [...]

@henz May I ask how it is bonded? For replacing the woofer one would need to remove the aluminium front is this possible or is the whole speaker to be replaced if the woofer is broken?

 

[henz]

@henz May I ask how it is bonded? For replacing the woofer one would need to remove the aluminium front is this possible or is the whole speaker to be replaced if the woofer is broken?

It's screwed together from the inside of the cabinet. Woofers can be replaced but we'd rather do it locally in our service department. However, Purifi woofers are notoriously hard to kill so we don't believe it's going to happen very often, if at all