Inside Yamaha amps

[delta76]

So properly turn on/off the amp, daily. Understood.

you can buy a smart plug for $10 and schedule auto turn on/off. I can imagine those A/B class amps to take time to stabilize so you can turn it on around 30m before you start listening to music.

 

[Zek]

so you can turn it on around 30m before you start listening to music.

If 30m isn't a bit too far for listening to music...

 

[delta76]

If 30m isn't a bit too far for listening to music...

I have no idea how long an amp can take to "warm up", so 30m is just a vague guess from my side. maybe completely off mark?

 

[Zek]

so 30m

30m = 30 meter

 

[delta76]

30m = 30 meter View attachment 301262

not sure if you are joking. m = minutes

 

[Zek]

not sure if you are joking. m = minutes

Min. definition and meaning | Collins English Dictionary

Min. definition: Min . is a written abbreviation for → minimum , or for → minutes or → minute 1 . | Meaning, pronunciation, translations and examples

www.collinsdictionary.com

 

[Deleted member 48726]

Guys, can you take your SI unit interpretations on PM?

 

[Astrofly]

@TheBatsEar just wanted to say thank
you for the thread. I always like looking inside an amp to see how it's made (for the amount I'm able to understand). These Yammies are cool. If I could justify a second system, then one of these would be a top contender. I can certainly understand your love of them.

 

[Deleted member 48726]

@TheBatsEar just wanted to say thank
you for the thread. I always looking inside an amp to see how it's made (for the amount I'm able to understand). These Yammies are cool. If I could justify a second system, then one of these would be a top contender. I can certainly understand your love of them.

Yeah, Yamaha has always made quality gear. And they have been very consistent making it so that you know what you get when you get a Yamaha amp. We can see that even their lowest tier amps are made with quality and separation etc. in mind. Other brands are all over the place when it comes to their lower price offerings.

 

[SirPaulGerman]

Maybe is the wrong topic, but I got a Yamaha P-2200 mint condition for $70. Working fine so far, a bit of hum when I set the input attenuators to 0db, is that normal ?

Can the P-2200 be used as home audio amp ?

Some pics of the inside

Here are the charts for the specs

 

[Deleted member 48726]

Maybe is the wrong topic, but I got a Yamaha P-2200 mint condition for $70. Working fine so far, a bit of hum when I set the input attenuators to 0db, is that normal ?

Can the P-2200 be used as home audio amp ?

Of course it can. High input sensitivity. High SNR. Passively cooled.

I passed on one some time ago because I didn't want to drive two hours to pick it up. At 70 usd it's a steal!

The hum. Is that mechanical or electrical (from the speakers)?

 

[SirPaulGerman]

Of course it can. High input sensitivity. High SNR. Passively cooled.

I passed on one some time ago because I didn't want to drive two hours to pick it up. At 70 usd it's a steal!

The hum. Is that mechanical or electrical (from the speakers)?

The hum is coming from the speakers

 

[Deleted member 48726]

The hum is coming from the speakers

You should start a thread so this one isn't "polluted".. The troubleshooting could last a fair share of posts.

 

[SirPaulGerman]

You should start a thread so this one isn't "polluted".. The troubleshooting could last a fair share of posts.

Maybe in the future, @restorer-john what do you make of the P-2200 ?

 

[TheBatsEar]

Maybe in the future, @restorer-john what do you make of the P-2200 ?

To learn more about the nature of the hum, answer these questions:
1) Does the hum get louder when you change the volume on the power amp?
2) Is the hum there with all sources disconnected?
3) Is the hum there with a battery operated source, like a MP3 player (make sure the volume is way, way down)?

 

[TheBatsEar]

I'm attempting to get a Yamaha R-S202 into Amirs measurement pipeline, lets see how that goes.

I haven't seen any comprehensive measurements for them so far, despite their popularity. They where also sold as A-S201 and R-S201 and i'm sure there will be a successor eventually.

Some pics of the inside

Appreciated and added to the second post.

 

[TheBatsEar]

I didn't want to drive two hours to pick it up

Right, sometimes it's just too much hassle.
Then again, most of my really good deals i got because i was willing to drive out of my metropolitan area.

 

[SirPaulGerman]

I did some research on the P-2200, and that particular Yamaha amp is the base for the M-2.
Here is the professional review of the M-2

Yamaha C-2a/M-2 Pre/Power Amplifier

With VFETs costing top dollar and facing stiff competition from other semiconductors, the late '70s saw Yamaha unveil a new pre/power amp duo. How does it sound today? It's always intriguing to see how a company reacts to the realisation that a technology it has championed is reaching its...

www.hifinews.com

can someone review the lab report and check if the numbers are good ?

 

[TheBatsEar]

can someone review the lab report and check if the numbers are good ?

They are good.
Modern amps are better in terms of noise and distortion, but in my opinion you wouldn't hear a difference at regular listening levels with regular speakers.

 

[croseiv]

Sweet thread! I have the A-S801. Running it with some Monolith Encore T6 speakers! I am enjoying the rig. I listen in pure direct mode, mostly via pc to the usb connection on the amp. I also like to spin some vinyl. Just a little rig for the apartment.