Need some help with distortion on lsim 707
Need some troubleshooting guidance
I picked up some used lsim 707s with a lsim 706c center. I’ve been chasing a crackle issue I believe is in the midrange.
The saxophone at the start of Miles Davis “All Blue” really brings it out.
How do I proceed?
How do I tell if it is the mid driver or the tweeter?
How do I tell if it’s the speaker or the crossover?
I’m pretty sure it’s the midrange driver but I am not certain. All three speakers are doing it.
These sound glorious apart from this issue
I picked up some used lsim 707s with a lsim 706c center. I’ve been chasing a crackle issue I believe is in the midrange.
The saxophone at the start of Miles Davis “All Blue” really brings it out.
How do I proceed?
How do I tell if it is the mid driver or the tweeter?
How do I tell if it’s the speaker or the crossover?
I’m pretty sure it’s the midrange driver but I am not certain. All three speakers are doing it.
These sound glorious apart from this issue
Comments
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First off, let's narrow this down a little bit more. Which speaker(s) are in question here?
Tom~ In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence. ~ -
All three - left, center, and right
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Hmmm, that would lead us to take a look at all upstream gear....not the speakers themself.
Would you be so kind as to offer us a rundown of what's hooked up in succession? From power conditioner, to pre, to source, to amp....basically the entire chain as to what leads up to the speakers.
Knowing this will help us help you.
Tom~ In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence. ~ -
That’s really a good thought
Power:
Wall outlet to power strip to Denon receiver and Apple TV
Sound source:
Apple TV 4K to denon receiver via 6’ hdmi cable (Amazon basics, have to check on the hdmi version for this cable)
Apple Music miles Davis album, but I notice this distortion from any Apple tv content
Denon AVR to speakers via 8 gauge copper speaker wire
No bi amp
No additional amplification
I will test the same song via cd and Blu ray player
That’s a really great idea - thank you
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Playing the cd on the Blu ray player I get the same result, so that rules out the Apple TV and the Apple TV to receiver interconnect
I could try a different zone on the Denon to take a different internal amplifier pathway -
Keep trying the simplest path of audio to try and narrow down what the culprit is. You are on the right track. You/we will eventually find it.
Tom~ In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence. ~ -
I tried a different speaker on the same setup and I still hear it in the new speaker, so that leaves AV Receiver and maybe electricity.
Really glad it’s not the speakers but genuinely intrigued/concerned now -
Thank you for listening. Some new members reject what is requested and are stuck in their ways.
So, the speakers are not the issue.
Can you narrow it down to a specific component within your system?
If you can't figure it out? The folks here sure can.
This is what we do.
Tom~ In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence. ~ -
those speakers are known for their tweeters, or as I call them, glass tweeters.
Most likely break up resonance in the tweeters- Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit. -
those speakers are known for their tweeters, or as I call them, glass tweeters.
Most likely break up resonance in the tweeters
Especially if they came out of an HT setup that was pushed by an underpowered receiver or amp.The Gear... Carver "Statement" Mono-blocks, Mcintosh C2300 Arcam AVR20, Oppo UDP-203 4K Blu-ray player, Sony XBR70x850B 4k, Polk Audio Legend L800 with height modules, L400 Center Channel Polk audio AB800 "in-wall" surrounds. Marantz MM7025 stereo amp. Simaudio Moon 680d DSD
“When once a Republic is corrupted, there is no possibility of remedying any of the growing evils but by removing the corruption and restoring its lost principles; every other correction is either useless or a new evil.”— Thomas Jefferson -
You two need to improve your reading comprehension.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
I tried a different speaker on the same setup and I still hear it in the new speaker, so that leaves AV Receiver and maybe electricity.
Really glad it’s not the speakers but genuinely intrigued/concerned now
Remove the cheap a$$ power strip.
8 gauge wire for your speaker cable and your power source is an AVR!?! Total overkill with zero benefit.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
"The saxophone at the start of Miles Davis “All Blue” really brings it out."
I believe what you are hearing is not distortion caused by the sound system but it is in the recording itself. That is what a saxophone sounds like if you place the microphone too close. -
SeleniumFalcon wrote: »"The saxophone at the start of Miles Davis “All Blue” really brings it out."
I believe what you are hearing is not distortion caused by the sound system but it is in the recording itself. That is what a saxophone sounds like if you place the microphone too close.
It’s the source. I hear it in wireless headphones also
Great compliment to the sound quality of these speakers that I can hear this so clearly. I’ve listened to this album for… *ahem*… “A Number of Years” …and never noticed this.
I’ve been chasing this for a bit. In another thread I mentioned a shouting scene in The Mummy (2017) where you can hear the mic clipping. Now I want to review the other sources where I hear this and see how widespread the source issue is. If I find one, I’ll be back!
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That track is somewhat notorious for getting stereo owners to start chasing their tails looking for equipment problems after quality upgrades.
I can hear the distortion on my desktop speakers. It's apparent in the high resolution mono version at 192/24 too but is faithful to the original recording. It's really more apparent in the old style stereo version in the video below where there is more separation in the soundstage.
I must admit when I first heard it I wonderered if I had a tube going bad in a preamplifier.
https://www.youtube.com/watch?v=-488UORrfJ0
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It's one of those things that once you've heard it and realized what it is you can't unhear it. It's not uncommon for recordings of that vintage to have odd scratching and shuffling noises whether it's microphone distortion or natural movements of the musicians because the recordings are basically live captures. Dave Brubeck recordings can be similar.
I like the mono and stereo versions of Kind of Blue about the same. -
Most of the original recordings from this album have that close-mic distortion. One can appreciate the early recording nuances (I do), others think it's equipment playback issues, rightly so.
This distorted sound is also heard on the original "So What" track.Don't take experimental gene therapies from known eugenicists.
