Hello Mikey. I really appreciate your concern for the value of our time in that you will only do videos when you have something valuable to share. It's so very true that there are KZread content creators that will make videos with zero substance, or make a video that takes 20 minutes where the useful content they have to present really only needs 5 minutes. They have zero respect for other people's time. Keep up the good work. Thanks again for sharing your vast knowledge of hifi.

@OCDHIFiGuy

5 ай бұрын

Thanks FF ... ;-)

Hi Mikey Never heard anyone talk about room resonance, good information to know. Room set up is so important and as you stated every room is different so set up is unique to each room. Take Care Bill

@OCDHIFiGuy

5 ай бұрын

Thanks Bill !

Hi Mike, I am fortunate that my listening chair can be moved and have therefore been able to optimize the optimal resonance in the bass in my room and 2 cm forward or back makes a big difference. I have placed tape behind my listening chair.

After adding my third sub, I finally smartened up and treated my room. This was the golden moment for my journey to connect with the music. Thanks for sharing this knowledge about resonance and any insight into making the room more musical will be much appreciated.

REW and a Mic is a great help for this. I started learning it about 4/5 years ago and progressed into treating pretty much my whole room. That also progressed over the years, I now have full Front and Back walls floor to ceiling, side walls , ceiling clouds etc to combat room resonance. This also changed over the years and current stands at 40cm deep to help with the lower end.

@OCDHIFiGuy

5 ай бұрын

Thanks for sharing!

Mike!! I like your perspective on hifi. It has taken some time for things to sink in...but your thoughts about this stuff is to clear away the gunk we've been sold. Knowledge and experience over the newest snake oil remedies is what I come here for...and your energy! Thanks man.

@OCDHIFiGuy

5 ай бұрын

Thanks Charles !

You're are the person ive come across talking about this topic thank you bro

Same for me! Months of listening, placement and settings, but it's rewarding! The bass is fantastic with EDM, psytrance, classical etc. No matter the volume. Added a third one recently, at the back of the room. Even better, almost as if I'm listening inside a pair of headphones. I see subwoofers as active 'room treatment' instead of 'boomboxes'.

@OCDHIFiGuy

5 ай бұрын

Go, Shpongle !!!

OCD-M showing the rest of the YT’rs whats up!

I did the sub crawl in an attempt to attenuate a nasty resonance. I'm no expert, but you're right about sub levels and crossover points. I'm sorry I don't have any links for you. I come HERE for the good shit.

How dare you assume that I don't live in a literal anechoic chamber😂😂😂

@OCDHIFiGuy

5 ай бұрын

Lol. Right ?

I have a desktop system with an upward pointing sub. My nearfield dimensions are 3’x3’x3’. Yet, it resonates well throughout the family/nook/kitchen room. Pointing my sub upwards, using a guitar amp stand, takes the floor out of the equation. My room is no issue for me. Except I hear an ice maker in the kitchen and an aquarium pump in a nearby hallway.

Hey, Mikey. Thanks for all you do. I have 3-way open baffle speakers with active subwoofers. The crossovers are already set. Maybe there's a way to change them, but it's way beyond my capabilities to do so, and I'd be afraid of goofing up what the designer of the speaker must've thought the ideal crossover point. In a case like this, as there's no way to adjust the relationship between bass, mids, and tweeter, is room treatment the only way to deal with room resonance? I don't feel like it's a big issue, but you don't know what you don't know. It's possible some properly placed treatment - absorption, I assume - might show me some of what I've been unknowingly living with and missing out on. Any thoughts or suggestions would be greatly appreciated. I'm also aware your time is valuable and that appreciation doesn't put dinner on the table. Maybe there's a way to compensate you for your time?

This video warns about the issue of room resonance and its effects on sound quality. The presenter notes that every room has natural resonance frequencies that are emphasized, where certain low frequency tones are dramatically boosted depending on the room's dimensions. This can cause bass management problems, overly boomy low end, and a generalized lack of precision and clarity. The presenter demonstrates this using frequency sweeps in different sized rooms, where you can clearly hear peaks and dips in the response that warp the original sound. He notes that many people are unaware they are even experiencing these resonances. To remedy this, the video recommends treating rooms using various techniques such as bass traps, panel absorbers, cloud panels, diffusion panels, and room equalization products. Proper treatment can tame resonances and yield a far more linear frequency response. Untreated rooms can make audio sources sound unclear, muddy, and exaggerated in the bass, so addressing room resonance is important for an accurate listening experience. In summary, the video raises awareness of this acoustic issue and provides tips for improving room acoustics.

@Burevestnik9M730

5 ай бұрын

The video does mention some potential DIY methods for treating room resonance without professional treatment: - Bass traps can be made at home out of rigid fiberglass insulation panels and mounted in the corners of rooms where low frequencies tend to build up. - Acoustic panel absorbers of varying thicknesses can be constructed and placed on walls to tackle mid-range resonances. These can be made from rigid fiberglass or mineral wool panels enclosed in fabric. - Cloud panels suspended from the ceiling are another DIY option, using a frame filled with absorbent material to dampen high frequencies. - Diffusion panels on walls containing irregular surfaces or shapes can break up standing waves without fully absorbing them. - Room modes in the bass can be addressed using a measurement microphone and equalization software to apply cuts and boosts targeting problem frequencies. So while professional acoustic treatment would provide optimal results, the video suggests many treatments can also be effectively made and installed at home to start tackling room resonance issues. Proper placement based on room dimensions is important for any DIY absorption panels or traps.

@Burevestnik9M730

5 ай бұрын

Here are some more details on using measurement and equalization to address room modes: - You'll need a measurement microphone, sound pressure level meter app, and room EQ software. Something like Room EQ Wizard is free and effective. - Set the microphone up at the main listening position and take measurements of the room's frequency response. This will identify any boosts or dips from resonant modes. - Common room modes occur at frequencies linked to the room's physical dimensions. For example, a room's length or width multiplied by various factors. - EQ software allows you to manipulate the response curve, applying cuts or boosts precisely at problem frequencies shown in the measurement. - Cuts lower resonance peaks to flatten them out. Boosts lift dips to smooth the response. - The goal is to make the curve as linear as possible through the bass range, eliminating boosts over ±3dB if possible. - EQ can be applied globally through main speakers or via a dedicated subwoofer if present. - Retake measurements after each adjustment to fine-tune further until modal issues are minimized. - Proper placement of bass traps can work in tandem with EQ to give best results. With some experimentation, room EQ software allows tailored correction of room resonances from within the mixing position.

@Burevestnik9M730

5 ай бұрын

Here are some tips for determining problem frequencies from room measurements using software: - Take multiple measurements from different angles/positions and average them to get a smoother response curve. - Look for peaks or dips in the bass range (usually below 200Hz) that are more than +/- 3dB from the overall trendline. These indicate resonant modes. - Reference the room dimensions and calculate expected modal frequencies by dividing speed of sound by factors of the length, width, height dimensions. Common factors are 1/2, 1/3, 1/4, etc. - The software may identify peak frequencies numerically based on curve shape. Hover over peaks to see the Hz value. - Sweep a tone from subwoofer and watch for where response suddenly boosts or dips - that frequency may need treatment. - Compare to measurements in other rooms without noticeable issues. Problem frequencies will stand out more in the problem room. - If peaks are very sharp (Q factor >5), absorption may be needed. Broader peaks (Q

@Burevestnik9M730

5 ай бұрын

Here are some guidelines for determining if a room peak needs absorption or diffusion based on how sharp it is in the frequency response curve: - Sharp, narrow peaks (high Q factor) generally need absorption to reduce their level. - A high Q peak will appear as a tall, narrow spike on the response curve graph. - Q factor is calculated as the center frequency of the peak, divided by the width of the peak at half its maximum height. - A Q factor greater than 5 is considered a very sharp, high Q peak. This indicates it needs absorption treatment. - Broader, gentler peaks (low Q factor) may be better treated with diffusion. - A low Q peak will have a wide, rolling shape rather than a sharp spike on the curve. - A Q factor of less than 3 is generally too broad to effectively treat with only absorption. - Diffusion treatments help to reduce resonances by spreading reflections more evenly rather than fully absorbing them. - Placing both absorption and diffusion can provide the benefits of both by creating a less resonant, more diffuse acoustic environment. So in summary - check the Q factor, and high Q (>5) peaks likely need absorption, while broader (

@Burevestnik9M730

5 ай бұрын

- For absorption, target wall locations at node points of standing waves - usually 1/4, 1/2, 3/4 lengths from the wall. - Absorbers on the first reflection points (where sound bounces off walls to listeners) help reduce reflections. - Absorb foremost wall surfaces directly in front of and behind listening position. - Absorb ceiling as well to reduce buildup of high frequencies. - Place bass traps in room corners, where low frequencies congregate. - Diffusion works well on wide "flanking" side walls perpendicular to key surfaces. - Reflection phase grills help balance direct/reflected sound up to 2m from surfaces. - Diffusers and reflectors above and behind listening area spread reflections. - Follow the 80/20 rule - treating the most reflective 20% of surfaces yields 80% of benefit. - Placement is an iterative process - adjust based on room measurements and listening tests. Proper distribution and combination of absorption and diffusion according to the room's dimensions is key for good acoustic treatment. Start with the primary surfaces first.

LOL! I remember one of Sun Coast Shill's videos where he talks about how "normal" it is to adjust subs for every song. There should be a law preventing the likes of AudiogoN Jay from dispensing advice. His knowledge base is virtually non existent. This video is just one example. I wonder what's the resonant frequency of the average two car garage?... lol

@pulDag

5 ай бұрын

Google room modes. You will find calculator with graphic output. Long story short, the will be not just one.

Mikey if we clear the Ether do we get cleaner Ethernet?

@OCDHIFiGuy

5 ай бұрын

Big time...

The U.S. Department of Energy............................ has announced that besides OLED TVs, all Wall-Warts & External Power Supplies shall be scrutinized and newly mandated to reduce their power inefficiency by 2025. Reggae, Funk $ Brass 🔈🔉🔊

Mikey!! Show

@OCDHIFiGuy

5 ай бұрын

Yeah baby !!

@GeneDemarco

5 ай бұрын

What if the room is so large, you have to have a spl quite high to get into residence amplitude... So would it be better to have a larger room like yours Mr. OCD could you be more specific about size as the lady may say size does matter 😮

@GeneDemarco

5 ай бұрын

@@Coneman3 cool 😎 I have a small collection of ty ones there like family ty 🐻🐨

Clash of Titans: Mikey vs Amir. I just came up with this title, imagining that Mikey bravely invited Amir, with all his measuring equipment, into his music cave. I believe there would be millions of views watching this Clash of Titans. Heck, I am gonna give tis title to AI to produce a marketing video for this clash of the century.

@OCDHIFiGuy

5 ай бұрын

Want to know what would happen? Ill tell you. It would measure like shit but be the best sounding room he's ever heard. His mind would break first, then his ego.

@Burevestnik9M730

5 ай бұрын

@@OCDHIFiGuy I suggested to Amir the following. I firmly believe this would level the ground between the two titans: Here is one approach to measure jitter in a USB cable connecting a music server and DAC using an Audio Precision: 1. Connect the music server's USB output to the Audio Precision analyzer's USB input using the test cable. Ensure the server and AP are synchronized to the same clock reference. 2. Enable the AP's USB receiver and configure it to extract the recovered clock. This allows measuring the clock recovered from the USB signal at what would be the DAC end. When a digital signal like USB is received after propagation through a cable, the receiver must regenerate the timing information/clock from the received data signal in order to correctly reproduce it. This recovered clock is what would then be used by a DAC to sample and convert the incoming digital audio. By extracting and measuring that recovered clock directly with the Audio Precision analyzer, it allows characterizing any degradation compared to the reference clock. 3. Generate a reference clock signal from the AP and route it to an analyzer input. This provides a low jitter clock to compare against. 4. In the AP software, set up a clock quality measurement between the extracted USB clock and reference clock. Choose the appropriate plugin based on the clock frequency (e.g. AES/EBU, SPDIF). The AP has the proprietary software used to control the Audio Precision measurement device and view/analyze the results, specifically in the Audio Precision analyzer's control and measurement software (e.g. APx or SMA), set up a clock quality measurement between the extracted USB clock and reference clock. Custom software that is used to configure the various tests and measurements it can perform. This includes plugins and options to analyze clock signals and quantify parameters like jitter. 5. Select the jitter metrics to analyze - peak, RMS, jitter spectrum. Setting a longer measurement time captures lower frequencies. 6. Note any difference in measured jitter between using the test cable vs a known high quality cable. Differences would indicate added jitter from the cable. 7. Vary test parameters like cable length, bends/twists, proximity to noise sources. Correlating changes in jitter can identify weak points. 8. To isolate the cable's contribution, subtract reference cable measurements from the test cable readings. This process allows precisely characterizing the cable's impact on recovered clock quality at the DAC by comparing directly to a clean reference using the Audio Precision's powerful clock analysis tools. Measuring SINAD at the DAC output with different USB cables is measuring the impact of jitter/noise indirectly, whereas directly analyzing the recovered clock signal gives more insights: - SINAD looks at overall noise/distortion performance, but doesn't isolate the USB cable's contribution from other factors like the DAC's jitter rejection. - Direct clock analysis precisely characterizes jitter from the cable before it even reaches the DAC. This reveals weaknesses even if the DAC reduces their audibility. - Jitter spectrum details are lost with SINAD. Clock analysis shows if jitter is narrow band periodic or wide band random to help diagnose sources. - Threshold of audibility depends on program material. But direct jitter measurement ensures performance remains low enough for any DAC/system. - Correlating clock degradation with cable variables like length/bends helps engineer a design immune to those stressors. - SINAD change may be masked by DAC variation between tests. But extracting the same clock ensures a controlled comparison. While SINAD can indicate overall audible impact, direct clock analysis is needed to isolate the cable's influence, understand root causes, and guide design optimization. Hence, the two approaches complement each other.

@Music_time82

5 ай бұрын

​@@OCDHIFiGuy1000%

@brunorivademar5356

5 ай бұрын

Calling Amir a Titan ROFL. That guy wouldn't even listen to his system. He would measure 5 things and conclude it doesn't sound good. Lol

@brunorivademar5356

5 ай бұрын

In fact it should be the other way around. Amir should invite a group of audiophiles to listen to his system. The best system in the world of course! since it measures better than anything in the whole universe. Then everyone would procede to laugh at how underwhelming it sounds😂

Mikey, I offer this comment as a way to improve the focus and conciseness of your MAS format. Overall, this relatively short MAS includes four topics: (1) MAS format, content, and frequency of posts; (2) the “Flipside” board of the 11stereo website where you discuss tribe member content shares for your impressions; (3) room resonance; and (4) marketing resale page on your 11stereo website. Each is deserving as a topic on its own for a MAS, but this was a bit much for a single MAS. My advice is to spend a minute developing a brief outline on a single topic for a 5-10 minute MAS.

@OCDHIFiGuy

5 ай бұрын

Yes, what you described is me fractioning my information to stretch it out. Not interested so much. I'm just going to do what I want to when I want to. Otherwise my life becomes content creation and organizing. Not my thing..

@Music_time82

5 ай бұрын

You're wrong drago. Mike is the most engaging person on KZread as far as real world talk is concerned No fluff , just reality

@dragocelander6671

5 ай бұрын

@@Music_time82 I appreciate the feedback. I am a bit confused, however. How did you conclude that I implied that Mikey was not engaging, based on my written comment?

@Music_time82

5 ай бұрын

@@dragocelander6671 Just like a system, you can be critical of the sound, not enough detail, timbre is off bass not enough extension etc etc But engagement is the most important thing. Mike is engaging and truly has depth and substance. So to me if someone is trying to improve something not needed to be improved on gives me the impression you're not as engaged . Think about it. Just my opinion sir .

@dragocelander6671

5 ай бұрын

@@Music_time82 I write directly. My comment concerned format rather than content. Nowhere in my comment did I write that Mikey was not engaging. You’re criticizing my comment on the wrong grounds. “Think about it.” Lol

Thank you, Jesus

@OCDHIFiGuy

5 ай бұрын

Go in peace, my son..

Honesty... its all everyone wants 😮 JLA cr-1 active crossover & Rel CS 😊