Congratulations on the SOS review, gents! I appreciate that you take Phil Ward's feedback to heart and investigate if the DSP can be optimized further. Also, what's the "untidiness" around 7 KHz about? Is that an edge diffraction issue?

Huge respect for being told a problem and deciding to fix it. I hope to see you go a long way!

Thank you!

what's the issue? and what's the fix? I NEED TO KNOW!! :D

@@hellcat5music it was the tonality, the fix is probably gonna be dsp which is great news!

Brilliant idea, do it !

@PresentDayProduction Yes. I'm sure you blokes already know, but Erin Hardison @ Erin's Audio Corner has the Klippel NFS and has been using Klippel Analyzer products for driver & loudspeaker testing for well over 10 years. He has a very good relationship and rapport with the gentlemen at Klippel, as well as Purifi. He also has extensive experience with complete multi-way/multi-driver loudspeaker and subwoofer system tuning via high end multichannel DSP for over 10 years as well. He has interviews on his channel with the gentlemen at Klippel as well as Purifi, and has tested most of the Purifi drivers. For reference, I've been using both the 6.5" & 8" Purifi drivers as well as the BlieSMa T34B & T25B beryllium tweeters in my own high end DIY home & car audio systems for several years now with high end multi-channel DSP and amplification, and agree that they are perhaps the finest drivers that are publicly available. Of course, there are other professional facilities in the U.S. such as Warkwyn and Red Rock Acoustics who provide Klippel NFS and other loudspeaker and drive unit testing as well. There are facilities in the U.K. & E.U. that you are obviously aware of as well. Side note: My only reservations with your MUM-6 system when it's combined with the lower stand/bass cabinet module + swapping the upper 6.5" midwoofer for the BlieSMa dome midrange is the increased Center-to-Center spacing of the dome midrange relative to the tweeters when the adapter rings for the dome mids are installed, unless the adapter rings are designed with an offset mounting cutout which keeps the dome mid closer to the tweeter. With the increased C-t-C spacing between the dome mid and the tweeter, the crossover must be carefully considered as it will be difficult to achieve smooth and even vertical response and vertical directivity through the crossover region without encountering lobing/comb filtering effects when you are too far above or below the reference axis. Cheers

That would be amazing!

Thank you so much for sticking with us right from day one! Single-digit serial number MUM-8 owner right here! ^^^

Thanks Alessandro! Yes, fully upgradable over time, and the DSP updates will be FREE!

Thank you!

Thank you so much for your support over the years! ❤️ feel free to email us at info@presentdayproduction.com if we can help in any way :)

Hahaha thank you so much! Thanks for watching :) Keep your Mum safe!

Thank you!

Thanks so much for sharing it!

Cheers Rene!

Thanks Oscar! Can’t wait to bring a pair to your studio one day 😜😜😜

Thank you Niall!

We intend on sending him a pair for review soon

Thank you!

Cheers Koss! Great to see you here

Cheers Ed!

Feel free to get in touch at any time :) if you have any questions, I’d be more than happy to help.

We have indeed put lots of research into getting these monitors right! Feel free to drop us an email at info@presentdayproduction.com and we’ll give you loads of info on anything you’d like to know. We’re working on the MUM-10, too, that’s in the works!

@orphic-trench It's always best to start with an anechoically neutral, smooth, and flat response from the speaker system, especially in relation to providing for smooth and even horizontal & vertical Directivity. Note that that flat/neutral anechoic response does NOT equate to flat IN-ROOM response which should follow more closely to an accepted in-room target curve. The Directivity is most important (on-axis response/direct sound vs. off-axis response/reflections) because if the the on- & off-axis response isn't similar, when you try to use EQ to correct the On-Axis response, now the Off-Axis response will be off and not linear, and vice versa. But when you have smooth and even Directivity, the On-Axis AND Off-Axis response track Together and are very similar/linear, and this will allow you to EQ for your room and/or personal preferences without any non-linearities or frequency-dependent anomalies. Look up the ERDI (Early Reflections Directivity Index). This is the problem that the SOS reviewers picked up on in regards to the tonality/spectral balance issues, and is why Mark & James need to have the MUM monitors tested with Klippel's Near Field Scanner (NFS) in order to help properly address the issue.

its preferred flat for mixing and mastering as that would translate best across many many other speakers i would assume

@@TechnoAssassin-vx6zf It is never flat when you listen in an actual room in the real world. It doesn't matter how flat it is in an anechoic chamber. Plus, if you have DSP, then one more reason not to care. :)

@@orphic-trench That's just it! ...You DO NOT want to have FLAT *IN-ROOM* RESPONSE!!! You want the speakers to have FLAT *ANECHOIC* RESPONSE. And if you reply saying, "Well, I don't listen to my speakers in an Anechoic Chamber, so it doesn't matter", you have simply failed to learn and understand why this is so important and you don't understand the principles of loudspeaker design and acoustic science. Speakers that are designed to measure "FLAT" as well as have very similar On-Axis & Off-Axis Frequency Response overall in an ANECHOIC environment will sound the most neutral & accurate (NOT FLAT!) in the Widest Variety of real-world listening environments. If you start out with Speakers that are already NOT reasonably FLAT in an Anechoic environment, OR if those speakers do not have Smooth & Even Directivity/Dispersion between all of the individual drivers, the more work it will take to correct them to provide good IN-ROOM response and you will have more trouble getting your mixes to translate. In addition, the image Focus & Placement will suffer and you will experience Frequency-Dependent image shifting/wandering and lack of pinpoint focus. Your In-Room response should at least somewhat follow a known in-room Target Curve which will allow for excellent translation across the board. Otherwise, some specific frequencies will tend to "Mask" detail and neutrality in other ranges. The "Flatter" and "Smoother" the ANECHOIC Frequency Response & Directivity is, the better they will actually sound In Your Room before resorting to Room Correction. IF the speakers exhibit poor Frequency Response AND/OR poor Directivity matching ANECHOICALLY, the less effective Room Correction or EQ will be because the Direct On-Axis FR will not match the Off-Axis FR...So, when you or your software/measurement mic try to correct for the On-Axis Response, it will then throw off the Off-Axis response, and you will be endlessly chasing your tail. Look up the 'Early Reflection Directivity Index" or "ERDI" for short. If you really want to learn more and understand why, pick up the latest edition of the AES publication by Dr. Floyd Toole, PhD., titled "Sound Reproduction: The Acoustics and Psychoacoustics of Loudspeakers and Rooms". Another industry standard reference is Vance Dickason's "Loudspeakers Design Cookbook". IF the speakers start out with Flat/Smooth/Neutral Frequency Response ANECHOICALLY, the easier it will be for room correction like Acourate to adjust them to both Your Room AND Personal Preferences.

@@orphic-trench im not saying its flat in the real world. But haviing it flat when mixing and mastering will give the best results in real world use

We definitely intend to sell subs, as discussed in last night’s MUM Q&A :) we are working on them at the moment and will be selling them very soon. There will be a 6 inch, 8 inch, and 10 inch, most likely in passive radiator form.

Thank you so much! And yes, it’s a flop hair 😂 I tried removing it with VFX to save re-filming everything, but instead found more value in actually getting the video finished! Thank you for watching!

Erin’s ok and objective. But Amir, naaa, his devoted worship followers that don’t have a clue did cut PDP short because of their claims to be maybe the “best studio monitors” and not showing the measurements for us all. ASR members do care much for measurements ya know.

@vilddyr Yep. And Center-To-Center driver spacing, driver placement on baffle, and baffle step compensation are important considerations combined with the associated crossover implementation that I believe were overlooked in regards to overall amplitude response and especially smooth & even DIRECTIVITY matching between drive units. The Spinorama and ERDI data from the Klippel NFS measurements will reveal the issues in this regard, but as you mentioned, this should have been done during the development stage. Unfortunately, as relative noob "speaker designers" Mark & James didn't know what they didn't know. I would actually hold off on purchasing these (and I am) until this is sorted, as it will most likely require a new front baffle design with modified driver placement as well as significant crossover adjustments to account for the changes. I expect this to be an issue with the MUM-6 as well when the 6.5" midwoofer is swapped out for the Dome Midrange using the adapter ring when the MUM-6 is combined with the lower bass cabinet/module.

We haven’t yet done any cardioid tinkering, but the future has many possibilities! We already have lots of future products in sight!

Yes the centrally-aligned one is the centre speaker version

Well spotted - yes we redesigned the cabinet and now use exclusively Purifi PTTx drivers. No more Dayton Audio. The cabinet is optimised for the Purifi.

It's definitely coming! We'll be announcing that very soon, keep an eye out! You would be very welcome to sign up to our email list (NO SPAM, EVER), at www.presentdayproduction.com/signup , and our Discord at www.presentdayproduction.com/discord

We are working on the MUM-10 - the design was finished as of this week! It’ll be announced soon, we are tying up some final features. Keep an eye out! We have no plans for a passive version at the moment because of the unannounced features which will be a game-changer for the MUM-10.

We sell worldwide. We’ll have some listening spaces in Montreal within the coming weeks too. Feel free to drop us an email and I’d be glad to help! Thanks so much :) info@presentdayproduction.com

Yep, we’ll add some to the website. Thanks for the suggestion!

@@PresentDayProduction Nice one!!!

How dare you

@marcusm5127 This could be and should be accomplished by using the existing single tweeter but simply adding a separate DSP preset with a more rolled-off HF response or negative high-shelf filter vs the neutral/accurate response. Most DSPs such as the units that Mark & James are employing in the MUM Monitors have anywhere from 2 to 4 programmable/switchable DSP presets or "tunes". The majority of professional active studio monitors already incorporate low frequency and high frequency +/- "trim" controls which typically apply a +/- 3dB High-Shelf or Low-Shelf Filter to increase or reduce the low-end or treble response. The better studio monitors have several increments for these controls, such at +/-1dB, +/-2dB, +/-3dB, as well as a similar wide-Q filter with the same settings for the midrange response. Using two tweeters would add non-linearities (and undesirable comb filtering if both tweeters are playing at the same time).

I’m not sure we’ll follow the two-tweeter idea, but just adding to the above comment that we have full user-definable parametric EQ onboard

Well… for a future product we can certainly look!

Black and light grey are ordered in in larger quantities as they’re the most popular colours and so we get larger discounts on the material. Not only that, but light grey requires the least finishing

It’s to allow the tweeter to be above the mid when the speakers are used in landscape orientation

We've got you covered then ;)

Yes! We are working on them for a possible summer time release

They definitely do! They work well in almost all sizes of studio!

Oo, what’s been the revelation? I’m keen to know!

Feel free to drop us an email at info@presentdayproduction.com and we can answer your questions to see if it’s a good fit for you. :)

Agreed!

We are working on exactly this for the near future :)

Thanks hellcat buddy!

That’s very kind, and thank you for following us for all these years! Support like this really does mean the world to us, and makes it all worth it!

I think this is actually part of the effect of the rolling shutter of our camera - when filming it under certain visual conditions it is indeed linear

@producermathew I assure you that this is just an effect of the rolling shutter effect of their video camera, just like watching the vibration/movement of the strings on an acoustic upright double bass in some videos. As the image is "scanned" by the video camera's digital sensor, the scanning starts at the top and proceeds line-by-line to the bottom of the sensor and image frame. Due to the time it takes for this scanning process to traverse from the top of the sensor or image frame to the bottom, during these few milliseconds in time, the cone has moved. For instance, when the scan from an individual frame starts, the cone may be in the inward position, but at the end of the scan, the cone may be in the outward position just a few milliseconds later. When all of these individual frames are viewed consecutively as a moving video, it gives the illusion that the cone is "tilted" or skewed during its excursion, when in fact it is just an artifact of how the image sensor in the video camera is capturing the image. ;) ...just as Mark or James stated. Look up "Rolling Shutter Effect". These drivers have been extensively tested by independent 3rd parties and proven to have among the best possible linear xmax and lowest distortion of any diaphragm/cone based speaker ever produced. I use both the Purifi 6.5" (7") PTT6.5 and 8" PTT8 drivers in my high-end DIY home and car audio systems with the best sound I've ever experienced using many of the best high-end drivers for years...Scanspeak Revelator/Illuminator, Accuton, Dynaudio Esotar, SB Acoustics, Audio-Technology, C-Quenze, etc. I assure you there are no issues with these drivers. The cone is moving in & out perfectly straight or linear. They are legit.

Those subs were temporary designs we made for ourselves. We’re looking to release Purifi-based designs in the near future!

We’ll see what’s possible for the future :)

I'm sure that they could still review other monitors, but they may be a bit biased now. :p

We will always try to be as unbiased as possible, as we always have, but yes we do accept that reviewing monitors will require a slightly different approach in order to maintain neutrality.

The MUM-6 is £2,995 including VAT and is available at www.presentdayproduction.com (Click “Buy Now” to see pricing options)

That would be pretty sweet! And would only cost 90 million to ship anywhere! 😂

@@PresentDayProduction Hey, nobody said that it has to be a commercial speaker 😅 we are talking unobtainium here. If you guys cast for example the ATC enclosure and THEN transfer the internals and the drivers to it.. you could compare the measurements between the two.. The question is… can the best speaker of all time be improved? Stupid? Yes. But we all love watching stupid stuff 👍 Cheers

MUM-10 is definitely happening, as is the bigger double-woofer MUM-10XL. But not sure about a 12 yet as Purifi haven’t designed it!

@@PresentDayProduction truth be told...(2) 10" woofers will hit harder than (1) 12" woofer.🤓👍🏾

Especially if they’re Purifi woofers!

(2)10"s is ~40% area over a 12"

@@PresentDayProduction especially if they are built into a dual opposed sealed cabinet, they'd THUMP

Feel free to design one for us - we’re open to suggestions!

@@PresentDayProduction If I had any other skills than complaining on the internet you know I would!!

Haha it’s all good ;) maybe one day we’ll update it

We definitely intend to sell subs, as discussed in last night’s MUM Q&A :) we are working on them at the moment and will be selling them very soon. There will be a 6 inch, 8 inch, and 10 inch, most likely in passive radiator form.

If you compare it to what they compete with, they’re half the price of the competition for the same or better performance. We have 100% customer satisfaction so far, in over 23 countries, and so we are confident in their pricing and ability. These are high-end monitors and are priced as such - they cost US a fortune to build

It's a service-only port, so it's not going to be used very often at all. It's just for the rare firmware updates or DSP updates.

@@PresentDayProduction I see... Ok then... I know have a target to work towards... I'm get me a pair of these... It may or may not take time but I am going to get one...🥺 I followed from this was just an idea to reality.

Congratulations guys!! I love my Mum 8’s. Super speakers!!!

@@JustPlayitc00l Wait for the Klippel NFS measurement results to be completed as the front baffle layout/driver placement may need to change a bit to improve the FR anomalies that SOS mentioned as related to their directivity and ERDI, and the crossovers will need to change to account for that as well.

For now, very likely not, at least for the MUM series. We decided against a kit about 18 months ago - however there MAY be a speaker in future, a different model, which will be a kit. We are always working on new ideas, pretty rapidly, and so who knows where the future will take us!