EEVblog Electronics Community Forum

EEVblog => EEVblog Specific => Topic started by: Arlen moulton on November 11, 2014, 07:22:48 am

Title: SCAMS
Post by: Arlen moulton on November 11, 2014, 07:22:48 am
Why didnt you connect up a speaker to the amp so we could hear the sound quality and have you still got that projector
Title: Re: SCAMS
Post by: JoeN on November 15, 2014, 06:22:53 am
I have yet to see one video(/audio) recording of a speaker which gives a good representation of the quality of the speaker.  It just doesn't work that that way.   In every case, the speaker is going to sound like shit, even the best ones.  What do you expect to learn?
Title: Re: SCAMS
Post by: Arlen moulton on November 15, 2014, 08:25:09 am
How bad the quality is
Title: Re: SCAMS
Post by: tom66 on November 15, 2014, 02:03:52 pm
But how? It's going to depend entirely on how good YOUR speakers are too.
Title: Re: SCAMS
Post by: c4757p on November 15, 2014, 04:59:03 pm
How do you expect to discern scamspeaker(signal) by listening to (yourspeaker . yourdac . audiocodec . davesadc . davesmike . scamspeaker)(signal) ? I'd imagine you'll only get anything meaningful out of that if the scam speaker is so bad it literally sounds like farts.
Title: Re: SCAMS
Post by: Arlen moulton on November 15, 2014, 05:41:08 pm
I have some very good quality Samsung speakers at home and no sound quality is lost by any electronic bits between them and the mic so it entirely fasts on the quality of the scam speaker and the air between the external speaker and the mic, if you had the equipment to do so you could plug the scam speakers output into the recording device to get a direct feed of sound quality, a bit like what cool dude Clem does :--+
Title: Re: SCAMS
Post by: janengelbrecht on November 15, 2014, 06:54:28 pm
What is sound really ? Its something going on between your ears :P It all depends on the brain :P
Title: Re: SCAMS
Post by: Arlen moulton on November 15, 2014, 07:02:42 pm
No it depends on the scam speaker
Title: Re: SCAMS
Post by: janengelbrecht on November 15, 2014, 07:12:58 pm
No it depends on the scam speaker

That statement is only true if all ears hear the same - they dont actually :P Some people even tell me that in ear headphones from Apple can make good sound - that in its essence proves that sound is only in your brain - if your nearly braindead - anything can sound good :P Even Apple :P
Title: Re: SCAMS
Post by: Arlen moulton on November 15, 2014, 07:15:55 pm
What's with the :P
Title: Re: SCAMS
Post by: Refrigerator on November 16, 2014, 05:40:39 pm
That video made me a little sad, actually, i wish i found atleast something like that, i never find anything good at the dumpster.  :-\
Title: Re: SCAMS
Post by: Arlen moulton on November 16, 2014, 06:02:03 pm
I do but the bloody British council don't let you take 50working PCs away :'(
Title: Re: SCAMS
Post by: David_AVD on November 16, 2014, 08:03:29 pm
I once had a customer ask me to listen how his subwoofer wasn't working.  He was on the (land line) phone to me at the time.   :palm:
Title: Re: SCAMS
Post by: TheBay on November 16, 2014, 08:15:19 pm
I have some very good quality Samsung speakers at home and no sound quality is lost by any electronic bits between them and the mic so it entirely fasts on the quality of the scam speaker and the air between the external speaker and the mic, if you had the equipment to do so you could plug the scam speakers output into the recording device to get a direct feed of sound quality, a bit like what cool dude Clem does :--+
Samsung + Very good quality speakers. Isn't that an oxymoron lol
Title: Re: SCAMS
Post by: NANDBlog on November 16, 2014, 08:16:47 pm
very good quality Samsung speakers
I havent laugh so hard since I've seen Doctor Who the last time, thank you!
Title: Re: SCAMS
Post by: Arlen moulton on November 16, 2014, 08:31:04 pm
They're probably the best speakers I've got other than my HIFIs which together are worth over £2500
Title: Re: SCAMS
Post by: JoeN on November 16, 2014, 10:35:22 pm
I do but the bloody British council don't let you take 50working PCs away :'(
How do they stop you?  Do they guard their Dumpsters?

I forget what "council" means.  Does that mean you are on welfare or is that the home association?  Socialism sucks.  Too bad you can't just gun all your politicans down like we can.   >:D
Title: Re: SCAMS
Post by: TheBay on November 16, 2014, 10:35:52 pm
They're probably the best speakers I've got other than my HIFIs which together are worth over £2500
I'm curious to know what Hifi speakers you have? I'm in to Audio
Title: Re: SCAMS
Post by: JoeN on November 16, 2014, 10:38:45 pm
I once had a customer ask me to listen how his subwoofer wasn't working.  He was on the (land line) phone to me at the time.   :palm:

That's my point.  The fact is, the recording capability of a camcorder, even one with a good external mic, is hardly going to be good enough to be able to record a sound system and let the person watching and listening to the recording have enough information to make an informed decision on the quality of the recorded speaker.  I think Dave understood this and that's why he didn't bother wasting his time recording the output of that speaker.
Title: Re: SCAMS
Post by: TheBay on November 16, 2014, 10:39:11 pm
I do but the bloody British council don't let you take 50working PCs away :'(
How do they stop you?  Do they guard their Dumpsters?

I forget what "council" means.  Does that mean you are on welfare or is that the home association?  Socialism sucks.  Too bad you can't just gun all your politicans down like we can.   >:D
He's quite right actually. It's classed as theft. You can be arrested for taking something out of a bin or skip.

Also the same rule applies to a civic amenity refuse site. If you take anything you can be prosecuted for theft.

As soon as anything touches a skip or designated area it becomes the council's property.

However I often have a nose at the electrical section and have taken items though usually if I see someone going to dump something electronic I just take it off their hands.

Stupid law really, seeing as the council/government are pushing recycling.
Title: Re: SCAMS
Post by: JoeN on November 16, 2014, 10:42:02 pm
He's quite right actually. It's classed as theft. You can be arrested for taking something out of a bin or skip.

That's incredible.  For all I know, maybe in some state somewhere in the US (laws can vary quite a bit by state) it's technically theft too, but I have never heard of such a thing prosecuted and it's pretty common for people to look through bins in cities.  I assume it's quite legal in Australia since Dave is actually videoing it.  What an ugly law to have in what is otherwise a nice society.
Title: Re: SCAMS
Post by: TheBay on November 16, 2014, 10:47:46 pm
He's quite right actually. It's classed as theft. You can be arrested for taking something out of a bin or skip.

That's incredible.  For all I know, maybe in some state somewhere in the US (laws can vary quite a bit by state) it's technically theft too, but I have never heard of such a thing prosecuted and it's pretty common for people to look through bins in cities.  I assume it's quite legal in Australia since Dave is actually videoing it.  What an ugly law to have in what is otherwise a nice society.
Yes its stupid. Think the same rule applies in England as well as Wales.

I don't think anyone wants you to get something for nothing in this country.
Lots of perfect food stuffs go to waste and you can't touch that either.

When I was an engineer at the LG Factory we ran the old CRT based imac up on one production line, if we went over quota or Apple released a new model any spare had to be destroyed.  We had a big hydraulic crushing machine. Most of us played 10 pin bowling with imacs and then crushed them. We begged to take them home or give them to charity but they said no.

Such a wasteful society. I love finding something that's been chucked out and then fixing it. I've gone to dump my own crap down the refuse site and come back with more LOL.
Title: Re: SCAMS
Post by: Arlen moulton on November 17, 2014, 07:11:04 am
They're probably the best speakers I've got other than my HIFIs which together are worth over £2500
I'm curious to know what Hifi speakers you have? I'm in to Audio
in the bedroom I have some mission mx1 speakers powered from a Cambridge audio topaz am1amplifier. In the office I have a pair of B&Ws powered from a Kenwood keV series home theater amplifier
Title: Re: SCAMS
Post by: Refrigerator on November 17, 2014, 08:37:09 pm
They're probably the best speakers I've got other than my HIFIs which together are worth over £2500
I'm curious to know what Hifi speakers you have? I'm in to Audio
in the bedroom I have some mission mx1 speakers powered from a Cambridge audio topaz am1amplifier. In the office I have a pair of B&Ws powered from a Kenwood keV series home theater amplifier
I have a crusty vintage russian amplifier with some dumpster found speakers in some dumpster found boxes and i'm very happy with them.   :)
I love it when people start bragging about how good their speakers are.   ::)
Title: Re: SCAMS
Post by: TheBay on November 17, 2014, 08:40:09 pm
They're probably the best speakers I've got other than my HIFIs which together are worth over £2500
I'm curious to know what Hifi speakers you have? I'm in to Audio
in the bedroom I have some mission mx1 speakers powered from a Cambridge audio topaz am1amplifier. In the office I have a pair of B&Ws powered from a Kenwood keV series home theater amplifier
I have a crusty vintage russian amplifier with some dumpster found speakers in some dumpster found boxes and i'm very happy with them.   :)
I love it when people start bragging about how good their speakers are.   ::)
When I was young my dad acquired some very large Russian loudspeakers. I have no idea what make they were but they were old, large and sounded amazing.

He also came home from an auction with about 8 pieces of an ITT HiFi 80 system which was bought for very little.

That sounded absolutely amazing. It got passed down to me and I gave it away. I wish I hadn't now as I recently found out it was part of their Golden Ear range and very expensive. Each unit was their top tier model.
Title: Re: SCAMS
Post by: Refrigerator on November 17, 2014, 08:55:07 pm
When I was young my dad acquired some very large Russian loudspeakers. I have no idea what make they were but they were old, large and sounded amazing.
Must've been Radiotehnika speakers ( late 1970s mid 90s ), yet there were alot of big speakers from them If they were very big they probably were the Radiotehnika S-90 if they were big ( a little smaller than S-90 ) and super heavy they were Radiotehnika S-70 ( built in amp inside thus the weight ).
You can google for images and see, note that there are three different models of the S-90.
Title: Re: SCAMS
Post by: TheBay on November 17, 2014, 08:59:30 pm
When I was young my dad acquired some very large Russian loudspeakers. I have no idea what make they were but they were old, large and sounded amazing.
Must've been Radiotehnika speakers ( late 1970s mid 90s ), yet there were alot of big speakers from them If they were very big they probably were the Radiotehnika S-90 if they were big ( a little smaller than S-90 ) and super heavy they were Radiotehnika S-70 ( built in amp inside thus the weight ).
You can google for images and see, note that there are three different models of the S-90.
I had a look and these were a fair bit older. Would say 60's - 70's, the grills were non removable. Very wide. Big woofer.  3 way if I remember correctly,  the mid range had a plastic back on them like a disk that was sort of marble looking reminded me of half a bowling ball.

I sold them to a friend who used them for discos!
Title: Re: SCAMS
Post by: Refrigerator on November 17, 2014, 09:04:23 pm
When I was young my dad acquired some very large Russian loudspeakers. I have no idea what make they were but they were old, large and sounded amazing.
Must've been Radiotehnika speakers ( late 1970s mid 90s ), yet there were alot of big speakers from them If they were very big they probably were the Radiotehnika S-90 if they were big ( a little smaller than S-90 ) and super heavy they were Radiotehnika S-70 ( built in amp inside thus the weight ).
You can google for images and see, note that there are three different models of the S-90.
I had a look and these were a fair bit older. Would say 60's - 70's, the grills were non removable. Very wide. Big woofer.  3 way if I remember correctly,  the mid range had a plastic back on them like a disk that was sort of marble looking reminded me of half a bowling ball.

I sold them to a friend who used them for discos!
Hmmm, interesting, i may go to google and see if i can find something like that.
Title: Re: SCAMS
Post by: TheBay on November 17, 2014, 09:12:05 pm
Might be these:
http://2.bp.blogspot.com/-zBxKDceiiXk/TtOgpGFOZQI/AAAAAAAABk8/F2_r5lp7zyA/s1600/Simfonia-stereo+speakers.jpg

They looked very similar.

http://goldenageofaudio.blogspot.co.uk/2011/11/ussr-audio-classics.html?m=1
Title: Re: SCAMS
Post by: Refrigerator on November 17, 2014, 09:40:19 pm
Might be these:
http://2.bp.blogspot.com/-zBxKDceiiXk/TtOgpGFOZQI/AAAAAAAABk8/F2_r5lp7zyA/s1600/Simfonia-stereo+speakers.jpg (http://2.bp.blogspot.com/-zBxKDceiiXk/TtOgpGFOZQI/AAAAAAAABk8/F2_r5lp7zyA/s1600/Simfonia-stereo+speakers.jpg)

They looked very similar.

http://goldenageofaudio.blogspot.co.uk/2011/11/ussr-audio-classics.html?m=1 (http://goldenageofaudio.blogspot.co.uk/2011/11/ussr-audio-classics.html?m=1)
Those look like some rather typical looking speakers, i was thinking of something way different  :).
I've started looking at the kind of vintage russian speakers like mine at first, i tried looking for "??????","??????" yet i couldn't find much.
Man, those russians sure knew how to party back then.  :D
Title: Re: SCAMS
Post by: TheBay on November 17, 2014, 09:41:52 pm
Might be these:
http://2.bp.blogspot.com/-zBxKDceiiXk/TtOgpGFOZQI/AAAAAAAABk8/F2_r5lp7zyA/s1600/Simfonia-stereo+speakers.jpg (http://2.bp.blogspot.com/-zBxKDceiiXk/TtOgpGFOZQI/AAAAAAAABk8/F2_r5lp7zyA/s1600/Simfonia-stereo+speakers.jpg)

They looked very similar.

http://goldenageofaudio.blogspot.co.uk/2011/11/ussr-audio-classics.html?m=1 (http://goldenageofaudio.blogspot.co.uk/2011/11/ussr-audio-classics.html?m=1)
Those look like some rather typical looking speakers, i was thinking of something way different  :).
I've started looking at the kind of vintage russian speakers like mine at first, i tried looking for "??????","??????" yet i couldn't find much.
Man, those russians sure knew how to party back then.  :D
Back in the USSR hehe :)
Title: Re: SCAMS
Post by: gnif on November 18, 2014, 05:06:23 am
I have some very good quality Samsung speakers at home and no sound quality is lost by any electronic bits between them and the mic so it entirely fasts on the quality of the scam speaker and the air between the external speaker and the mic, if you had the equipment to do so you could plug the scam speakers output into the recording device to get a direct feed of sound quality, a bit like what cool dude Clem does :--+

"very good quality Samsung speakers" - Samsung are NOT a high quality speaker manufacturer, if this is the best you have heard you are missing out on more then you know.

"no sound quality is lost by any electronic bits" - So you have an infiniate resolution ADC & DAC on your soundcard, op-amps that are 100% noise free, resistors that are noise free, and using either uncompressed WAV or FLAC over a youtube video? I think not.

"plug the scam speakers output into the recording device to get a direct feed of sound quality" - Ummm, who here knows how to plug a speaker into their input? Perhaps you ment to say to record the amplifiers output? And if so, you will have to use some noisy resistors, or some other method to drop the signal level to record it on your completely lossless perfect low level input.


Title: Re: SCAMS
Post by: 84GKSIG on November 25, 2014, 09:12:36 am
every one would need to have the same speakers, same amp, same EQ levels set to get some form of a bench mark and have an understanding of microphone used, ive sent my mate recordings of various things before done with a mic and he always tells me they sound crap laptop speakers :-DD which is ofcourse what hes using to listen to the audio with.

but yeah just too hard, if you were gonna do it, youd want a spectrum spectrum analyzer and take a reading at set frequencies and various volume levels least you would have a visual interpretation, sadly those little amp ICs are hardly worth the time though.

EDIT: and youd need a sound proof room
Title: Re: SCAMS
Post by: Hade on November 25, 2014, 11:10:50 am
Back to the skip argument:

Many tips are privately owned and run in the UK, they turn a profit by selling your junk for it's scrap value.
Taking stuff is directly taking their product so it's not just legally theft, you are literally hurting their profits.