Thinking what you need to DO when matching Preamp & Poweramp, Don't. There is nothing to be matched.

Подписаться 2,2 тыс.

Просмотров 3,7 тыс.

50% 1

This is my answer to a common question, preamp and power amp matching. There isn't anything to worry about matching from the consumer point of view. If they sound good, keep them. If they don't get rid of them. The common concern with impedance matching is so irrelevant, there are more important numbers to consider.
Corrections: For a 50 watt and a 200 watt amp with the same 26db gain. The 200 watt amp require double the input voltage compares to the 50 watts amp to reach full power. Double the voltage equal to 4 times the power therefore 4 times the loudness. Not 2 times the loudness as I have stated in the video.
Product Information:
www.angela-gilbert.com
Facebook: / gilbert.yeung.50
Instagram: Angela-Gilbert Yeung
Flickr: Angela Gilbert Yeung
#angelagilbertyeung #gilbertyeung #audio #integratedamplifier #bluecircle #bluecircleaudio #preamplifier #audiophile #hifi #stereophile #highfidelity #artwork #artworks #functionalart #uniqueart #uniquearts #supercap #supercapacitor #Ultracapacitor #powersupply

Опубликовано:

2 окт 2024

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 44

@NickP333 3 месяца назад

Always appreciate your thoughts on anything audio related, Angela-Gilbert. I find that things like total gain, output impedance / input impedance, speaker sensitivity, etc. are a good place to at least start, but I’ve also heard some combinations that don’t really follow those basic rules and sound fantastic. It’s nice to hear your thoughts on the subject. Very much appreciated. Thank you. 😊🎶💜

@angela-gilbert 3 месяца назад

@@NickP333 Math is a good start. Ultimately, it is the listening to be the final judge. As I have stated in a couple of my replies here. I have used impedance combo to tune the system sound. When doing that, the math rules are out the window.

@greenlanternseven 3 месяца назад

AGY the Tesla of Audiophile HiFi audio equipment a super genius electronic guru that builds HiFi gear that puts the Titans to shame a Dragon Slayer at a quarter the price for some of the finest quality in music listening and can modify most people s personal amplifiers to epic levels to match , we are very lucky to have Angela Gilbert Yeung because the knoledge this person carries is Tesla and Einstein territory. ..I love Angela Gilbert Yeung SUPER GENIUS

@n.lyndley.9889 3 месяца назад

Take this advice from AGY, one of the most knowledgeable audio designers alive, rather than a RU-vid reviewer with zero engineering background.

@angela-gilbert 3 месяца назад

Most knowledgeable? Far from it. I am only sharing my experience and hope people understand what I am saying.

@lm74829 3 месяца назад

I felt this video was like made for me… thanks !

@angela-gilbert 3 месяца назад

@@lm74829 Glad you enjoyed and found it is useful.

@danielesbordone1871 3 месяца назад

Usually the rule of thumb is input impedance of amplifier / output impedance of preamp has to be a ratio of at least 20 , the higher the better , but I agree with the final judge being the listening test.

@angela-gilbert 3 месяца назад

Ratio of 1:20 is not even necessary. Higher is not always better, rather has lesser and lesser effect. Many applications allow much lower ratio and wouldn't hurt anything. As I have mentioned in the video, there are companies using 1:1 and they work just fine. When output and input impedance ratio get low or even goes into negative region, one can use to tune the system sound along with the length of the interconnects. However, in audio application length of cable usually has minimal effect of sound due to its low frequency range.

@kvrhifi 3 месяца назад

Excellent topic. This was reason I stick with RMe dac I can control output voltage for my Yamaha as3200. ( balanced connection) Dacs should have output voltage settings. Reviewers not mentioning about voltage outputs or gain levels . I learned how important to find balance between amps /pre amp gain , dac voltage output and speaker sensitivity level ..

@angela-gilbert 3 месяца назад

Voltage level vs Gain in db isn't a very common topic but it is correct way to understand the loudness and over all system volume. Marketing departments have not been using it to inform the public. Therefore, reviewers has to use terms that the general public understand. Many of the reviewers are also not necessary has deeper understanding of the topic from the technical point of view.

@ThePerkri 3 месяца назад

Timely…. As an avid diyer, the issue of gain is something I am just starting to dive into. First experience with a problem of too much gain, was with a single ended EL84 amp that uses a 7199 tube on the input. Well, it is insanely sensitive…. So much to learn….

@angela-gilbert 3 месяца назад

@@ThePerkri The first rule of learning from my experience is don't be afraid to fail. As long as you have learned something, the lessen is worth it.

@ThePerkri 3 месяца назад

@@angela-gilbertVery good advice! Being a perfectionist is one of my personality defects… Suited me well in my previous career. Music, electronics, audio gear and photography have been part of my life for as long as I can remember. Pursued photography, in hindsight, should have taken my electronics high school teachers advice and gone the electronics route :) Been working on a pair of speakers for the past year that I am planning on taking to market with a friend/business partner. But I need to be open to having things not work perfectly right out of the bag.

@angela-gilbert 3 месяца назад

@@ThePerkri There is a fine line between good enough and not good enough. There is no perfect. What we think is perfect today may turn out junk 5 years from now looking back to our own work. What I am saying is, if it is good enough, push forward. Other will give you their opinions and some of them may worth your attention and some not.

@ThePerkri 3 месяца назад

@@angela-gilbert Thanks again! Agree, had the same thing in my photography career. Things I photographed long ago, do not stand up to what I can do now (if I did it any more…) I did However, take photographs when I was young - personal photos - that I am still very proud of. We are starting to take the prototype around to get people to listen to. So far, so good! Gotta, as you said, push ahead.

@rvaillant 3 месяца назад

Thank you for your thoughts. I figured "just hook it up" would be your answer, ha. Is there a formula to calculate voltage gain of an amp by using output watts and input sensitivity, or some other way as most do not give a voltage gain of their equipment.

@angela-gilbert 3 месяца назад

Ahhhhhh, I am becoming predictable to you. 😆😁 Yes, there is a formula to calculate voltage gain in db from power output and input sensitivity. The voltage gain formula is Voltage Gain (db) = 20 ((log) Output Voltage / Input Voltage). For a 200 watt into 8 ohms power amp, it is 40V into 8 ohms. If the input sensitivity of this 200 watt power amp is for example 2V. The equation is Voltage Gain (db)= 20 ((log) 40/2)=26.02db. Most will consider it is simply 26db of gain.

@rvaillant 3 месяца назад

@@angela-gilbert Thank you. I have seen enough of your videos to know you would say, hook it up and see, ha.

@freeradical6390 3 месяца назад

Artist- Seal Song- Violet :)

@jameshutton5979 3 месяца назад

GREAT CONTENTS

@timleelim9930 3 месяца назад

The best way to judge an audio designer is to see what his/her record collection looks like. Definitely passed with, er ... flying colours 😂

@angela-gilbert 3 месяца назад

Thanks. This is about 1/3 of the whole collection.

@GeneralLao Месяц назад

This may be narrow minded thinking? I bought a power amp and same brand matching pre amp. was an amazing combo. I sold the power amp and bought the same brand Mono blocks. Again perfect match. I would assume the manufacturer would do their best to make sure the gain was correct with both their amp and preamp. I am not inclined to mix and match amps and pre amps.

@angela-gilbert Месяц назад

@@GeneralLao The manufacturer will do their best to match the gain but what is gain matching? What gain is perfect? It depends on the output level of the source and also depends on the sensitivity of the speaker. There is no perfect match. That's what the volume control is for. With now a day digital source being such high output, some of the mechanical volume control doesn't have enough attenuation to keep the music quiet enough for some apartment condo set up. Or Music is being way too loud when thr setting at 8 O'clock. It is a more common issue now.

@GeneralLao Месяц назад

@@angela-gilbert Yes I will be honest, With Digital my volume sits at 8 o'clock, when I play vinyl I get to 9 o'clock. At the end of the day, it sounds good to me.

@CarlVanDoren61 3 месяца назад

PAD 1m silver usb cable DAC Direct, no preamp 😊 DAC to analog JLA crossover Path Audio 1.2 10w attenuator

@StealthParrot 3 месяца назад

I thought that maximum power transfer is achieved when output impedance matches the load impedance? Whether or not this impacts sonic quality, I have no idea.

@angela-gilbert 3 месяца назад

@@StealthParrot You are correctly about the maximum power transfer. However, in the case of preamp driving a power amp at home use with relatively short distance, we want maximum voltage transfer..... mostly. In some exceptions, using impedance mismatch to tune the system sound is not unheard of. At least I have done it many times.

@StealthParrot 3 месяца назад

@@angela-gilbert Got it, thanks for the clarification.

@WeeWeeJumbo 3 месяца назад

i need to start rockin hats, jackets and matching kerchiefs. where do i begin? i’m not rich

@angela-gilbert 3 месяца назад

@@WeeWeeJumbo I designed and sell a lot of clothes. In this video, I painted me jeans and shirt only. The jacket, hat and pocket square are all stock waiting to work for me to put some paint on them. If you are on a budget, you can get some from thrift stores. Some of the online store also has good selection new and used. I got a lot from Yoox and some from ebay. Wait for the sales from Yoox if you ate buying new. They have stupid sales once in a while.

@WeeWeeJumbo 3 месяца назад

@@angela-gilbertthanks, cousin 😃

@CarlVanDoren61 3 месяца назад

EE audiophile same design w cables

@angela-gilbert 3 месяца назад

@@CarlVanDoren61 My biggest beef about cable is when companies are using high frequency transmission line theories apply towards audio base band cable. That is when I draw the line.

@CarlVanDoren61 3 месяца назад

Yes, crazy expensive 😮@@angela-gilbert

@thomasfi1275 3 месяца назад

Is it possible to connect a pre amp to the line level input of an integrated amp?

@angela-gilbert 3 месяца назад

@@thomasfi1275 Of course you can. Adjust the volume control on the integrated amp to obtain desire gain.

@thomasfi1275 3 месяца назад

@@angela-gilbertthe data sheet of my lector zoe pre amp says, 20dB gain and 20V@250Ohm output…?

@angela-gilbert 3 месяца назад

@@thomasfi1275 Simply connect the preamp to one of the line level inputs of the integrated amp. Start both volume controls from zero. Turn the integrated amp volume control to approx. 9 O'clock. Play some music, then slowly turn up the preamp volume control. Get a feel of where the volume controls sound the best. Then enjoy the music.

@thomasfi1275 3 месяца назад

@@angela-gilbert thanks for your support! And please continue with tech talks.