It would be nice if other UKpostsr's took notice and learned by watching quality videos like Paul's that having people you fiddle with something for 5 minutes while talking about what you and your girlfriend ate last night (and its not a food channel) before even getting to the point of the video is not entertaining. Nor is going to a concert and trying to record the concert on your phone, think it will be "cool". And all you end up with is a blurry and bouncing video that sounds like crap. But everyone seems to want to do it. It's annoying to the fans trying to watch the show, and certainly not entertaining by any degree of measure for someone to watch on your UKposts channels. Yet, there's thousands of videos like that on UKposts. "If" you have an iPhone (Apple) and can stabilize the phone you may get some decent video. The cameras on those things are crazy good. But there isn't a single cell phone out there with a decent microphone, especially one to record live music so your good video is still going to sound like crap. It's a music a concert. The sound quality is the most important aspect of the recording. You'd think before going and doing that they would look up online some of the processes and equipment professionals use to record concerts. And learn it's best to not even try. Just enjoy the show! lol Sorry, but as much as I like UKposts for the most part, there are way too many crappy produced channels. No Quality Control. Everyone wants to be a "star". lol Take care.

it takes time. videos, like 4 or 5 years ago, he started with a rant. :)

That's a weird thing to say. There are tons of serious hifi companies that are highly dedicated to bringing the best sound they can.

Far too much is made in China. There are over 200 brands of aftermarket car stereo brands (I do car stereo installs, when people have money anyway. lol) and 95% are all made in China. A number in South Korea of some of the better brands (and if you can afford should look for South Korean made eqpt) with just a handful made in America (which is the best in my book) and a few in Europe, and Japan. Japan hardly makes car stereo equipment anymore like they did back in the day. And Japanese stuff is very good too. But that's the problem with what you mentioned about sound quality. Too much crap made in China with attitudes of not caring what is being produced, and poor quality control on top of it. Since you are a purveyor of fine equipment, I'll let you in on a little known secret. You want "the best" stereo drivers (woofers, mids, and tweeters) that are better than 99% of the offerings out there, and are affordable without the crazy prices: SB Audience. They are made in Indonesia by one of "the finest" speaker manufacturers in the world because they are 100% vertically integrated. In other words, they do not use any outside parts, making everything in house. Something very few speaker manufacturers do. SB Audience only makes professional level speakers. But, not finished speakers, only the drivers. Most of their offerings come in both 4 ohm (car) and 8 ohm (home). However, the only distibutor in America is Madisound. Still, the speakers are affordable compared to other high end speakers. Ex. woofers start a little over $100 each. Tweets $40-$60. Sure you will need to come up with boxes or cabinets. Or many will fit in standard speaker placements for cars with just a plastic adapter ring to secure the speaker. You can't go wrong with these speakers. Soon as things get back to "normal" on my end, I'm going to outfit my car with all SB Audience speakers. By the way, pretty much "anything" offered by Madisound, regardless of price, is a very good performing speaker, much better than what you will find most online stores. Meaning anything you purchase from them will make you happy. They are a little "audiophile" snooty, but that's because its ran by engineers, not marketing guys. I highly recommend anything they offer. As well PS Audio as well. I sure would like to. Most likely in a "used" form most likely. lol. But a higher end used system is better than a new crappy stereo system in my book. And generally how I come across my personal audio gear since I'm working to make ends meet these days like so many others. Hopefully that will change this November, and America can get back on track being the badass country it used to be. lol. Take care my friend. (PS. If you are wanting to "upgrade" your car stereo, don't buy car stereo eqpt. buy Marine audio eqpt. Marine audio is all 3rd party tested and certified unlike car audio. So even your non-name brands Marine audio is on par with name brand stuff. It has to be to pass certification. The best offerings by most mobile audio companies is their marine eqpt. I used to live in Houston, TX and do boat stereo installations, and that is how I learned marine eqpt really is much better than what is offered for cars. In both durability and sound quality. Even, or especially the Chinese stuff). Now go and crank it up. lol

Actually mosfets are better at upping current .. but realize the power supply must be able to deliver.

@@davidstevens7809 I'm an EE but I haven't looked into the reason why. Their gates do have significant capacitance but I haven't studied what that does to slew rates and other factors. A very low "on" resistance is what makes them so efficient.

@@randyduncan795 makes them respond faster..yes

I thought the power MOSFETs used in amplifiers were subject to thermal runaway?

I did notice that in the car it would get extremely hot and it wouldnt be quite as good sounding but in my house in the ac it stayed cool even when cranked up full volume

Lateral mosfets are the only sub-type, where the drain current vs gate to source voltage drops with the die temperature from about 120mA of DC bias per pair. For hex-fets, this relationship still exists, but only for drain currents measured in amps. Distinction in regards to thermal runaway susceptibility should be made between the two.

@@paulb4661 Could you please dumb down your answer? I don't have an electronics background.

@@BruceCross Hate generalizations, as the devil is in the detail, but lets say hex-fets should ideally still be thermally compensated, whilst lateral fets need not be. Lateral mosfet output stages are rare as hens teeth and the ones designed correctly even more so. In my opinion and to my ear, lateral mosfet current stage amps done correctly sound superior to pretty much anything else, including tubes, but at a price.

Just refreshed my ppi 2150am from 92, finest sounding amp.

No.its not mosfet.. its 2n6487 and 2n6490.. bjt output..thats why they are current limited..now is the time to tell..I HAND MADE PUNCH 45s for rockford in the 80s.. Im directly involved in amp evolution..and design.. ha ha..

@@davidstevens7809 curious what your makers mark was inside.

@@koprcord5338 ? Explain..are you asking about makers distillery? Its hour from louisvile..but..i actually cut some shutters for the buildings back 40 years ago..yup..i worked there..temporarily.

That ouput ic is ha13151.. and isnt mosfet..

I explained..everyone uses that same mosfet output ic. I even told who makes that ic.. I cant tell any secrets about build houses

@@davidstevens7809 It's always cool to hear from someone with insider knowledge. 🙂

@@ruley73 Ok. Here goes..MATSUSHITA BUILDS FOR EVERYONE..YUP.PANASONIC..not every model but..they build for alpine.pioneer.kenwood.jvc.sony.Swear!

Jenson *quadaxle* car speakers. What year where they or decade did they come out?

@@Mark-lq3sb 80s

@@terrywilliams7827 *Quadrax* That was the name of their new 4-way car speaker in 1981. When you mentioned "axle" it just didn't sound familiar. I finally found an old magazine ad online. I kept searching Quaudaxle and nothing but coaxial and triaxial would show up. I was beginning to think you had the only pair ever made, lol! Back in 1976 (when I was 17.) I bought a pair of new Triaxial 6x9 along with a Pioneer Super Tuner cassette deck to mount in my '68 Chevy Chevelle. Driving though an intersection on the way to my gas station job someone decided they didn't want to stop for the red light and plowed into the passenger side. It was totaled, so I removed the speakers the cassette deck and my almost new battery; set it up in mom and dad's basement and continued jam on some Led Zeppelin. Didn't sound half bad, lol!

Not just nowadays.

@@36karpatoruski Do you have speakers and amplifiers that were made when cassette tapes were popular or radio. Talking about the 60's 70's and 80's. then this can sound too cold and bright with CD or MP3 music. What's Your opinion?

Yes, my hobby started in the late 60’s. Never heard a cassette sound harsh, but only made my own cassettes from LP’s, never bought any pre-recorded. Some harsh or thin sounding amps or receivers include units from Phase Linear, Crown, Carver, and Sherwood. 60’s - 80’s vintage gear. Of course, poorly recorded CD’s will sound harsh using just about anything for amplification. Also, harshness is a matter of degrees. What some people find objectionable, others may be ok with.

​@@ford1548my dad had a home stereo from the late 70s (it had quadrophonic sound) that me and my brother used to play cds on and it sounded great we used it with a pair of speakers my dad built when he was younger

Um i used a converter im pretty sure it was more stable than the crappy neverstart batt i had in the car

I have been watching the process of power generating and storage in car audio, fascinating. Lithium, super capacitors ECT .

I found interesting articles on "Elliott Sound Products - The Audio Pages (Main Index)"

A few authors pop into my mind Bob Cordell and Douglas Self. You also have the Elektor Magazine crescendo millennium edition. But I have to warn you using older drawings even 10 year old for an amplifier project. Always check you can get all the components before doing anything. Like in the crescendo millennium edition. One of the transistors the 2sk537 is hard to get unless you are willing to pay exorbitant prices. Sorry UKposts allow no links. But well the information is out on the web

Some competitors choose BJT. Current is critical, that's the argument. But...Paul's products have few critics in regards to sound..

I understand what your sayin but its hard to describe the sound without using all the buzz words like soft, pillowy, or warm. In audio terms i would say a colorization of the high end around 5k to 10k that makes sound less fatiguing to the ears, less harsh. It just sounds good though

@@Durkhead it's a little more than buzzwords nowadays. One reason class d amps are praised is higher current, imo...

​@@JohnHarnickclass d are praised for their efficiency and size i have a one volume knob class d thats fits in the palm of your hand thatll get loud enough to drive the rest of my family crazy

@@Durkhead that gain in efficiency means (much) more current is going to the voice-coils. A/Bs intentionally drain that current. A/B amps were one of the great hoaxes of audio. A 'd' amp at 20 watts, was made in 1965.

Gallium Arsenide? Not sure what the N stands for… Possibly N channel and P channel

Good explanation Paul

Nope..open signal ground. Term is called motor boating.

Class B and AB are inherently push-pull. Class A can be single ended or simply a class AB where the "pull" side turns off only on the full "push" side and vice versa. But if you have that for 8 ohms and load it with 4 ohm, that will run out of current and become somewhat class AB; if you load your typical class AB with 1000 ohms, it will probably be able to do that in class A...

Actually Mosfets were pretty prophetic in my experience so

Which amps are these?

Just to let you know, your 2003 Sentra probably had some small DSP functionality built-in which probably included a factory EQ curve to improve the sound through the factory speakers. Were these types of vehicles swapping the OEM head unit can actually make things sound worse because you've removed the eq. I don't think that would explain why some aftermarket radios sounded better than others, but it's something to keep in mind. As newer vehicles became more complex and radios were more heavily integrated, a whole new market opened up that allows people to upgrade late model cars.

Hi, I also bought a Pioneer car stereo, I too found it very harsh sounding no matter what you did with the settings couldnt really get it to sound nice, I returned it and also got a kenwood, really nice solid warmer sound, kenwood car stereos seem to have a unique sound quality

@@andrewwalsh5837 Both of you guys are acting as if the brand has something to do with a sound. Each of these brands makes many different head units over a wide price range. If you were listening to the cheapest Pioneer model it may not have sounded as good as a medium-priced Pioneer model. And an upper priced Pioneer might have sounded amazing. So there's really no rhyme or reason to believe that an entire brand sounds bad and some other entire brand sounds good. That's kind of silly.

@@JasonWW2000 "Both of you guys are acting as if the brand has something to do with a sound." Well, of course the brand has something to do with the sound. In fact, it has everything to do with the sound. "Each of these brands makes many different head units over a wide price range." The differences in price were due to features. According to the shop that sold and installed my Kenwood unit, all of them have the same sound quality (same built-in pre-amp, and amp). Pioneer did make a unit that was 5x the price, which I did not hear. But among the Pioneer that I did demo, and the Sony, and the JVC, and the Kenwood, they were all priced within $20 of each other. I did not go for any features that I would not have used (I can't remember what those features were, but they had nothing to do with the sound quality). The Pioneer sounding nothing like the others. The Sony and the JVC were both boomy (I did not spend time critiquing the rest of its sound quality, because I would never buy it, and I was using the stop's time). The Kenwood, with all of its DSP, equalization, or whatever else it has or whatever it is called, sounds fantastic, with everything set to neutral. The other brands just sounded bad. And since I rode around with the Pioneer for a few days, I tried every setting it had. It simply yelled the music. It was an irritating sound.

@@NoEgg4u The guy at the shop that told you they all sound the same and it's just different features didn't really know what he was talking about. Logically, does that even make sense? The different radios have to hit different price points. The more expensive units can use higher quality components and design to deliver higher sound quality. The cheaper units have to compromise on the design and use lower quality components which tends to create a lower quality sound. It's pretty much the same with any audio company talking about receivers, speakers, amplifiers, etc...