My first Tube Amplifier


I have a 40 years of audio history starting with Garrard Turntable, Fisher Intergrated(SS), ADS bookself speaker on 1978.

But I started using tube amplifier on 1999.

Since then I had been using only tube amplifier in my main system.

My last SS main amplifier was Krell KSA 150 to drive Apogee Duetta Signature speakers.


http://www.jadis-electronics.com/photos/ja500/45/3/ja500.jpg

My first tube amplifier was Jadis 500 which comprised of 4 pieces weighing 120 lb each.

B&W 801 driven by Jadis 500 gave most deep and powerful bass at my home.

But it generated too much heat so it was hard to use during summer.

It was memorable experience to use it for 4 years.

I may not go back to such monster tube amplifier again.



How about you?

What is your first tube amplifier?



I bet two cents on no one had used larger one as the first tube amplifier than mine.


128x128shkong78

Showing 27 responses by shkong78

@wolf_garcia 

Fender Bandmaster must be pretty good guitar amplifier.

Marantz tube receiver also had a good reputation.
@atmasphere 

 Knight KA-95 appears to be nice one for first tube amplifier.

It is really fun to do tube rolling.  That could be good DIY project
@milpai

Congratulation on getting tube pre amp.

Next step will be to get tube power amp to get the best warmth out of tube.
@jond

Stock 6550 tend to be bright but if you get Nos tube it sounds much better.


@dweller

Nice first tube amplifier.

I moved from San Francisco to Chicago on 1988.

But at that time I did not have courage to try out tube amplifier.


@gregdude


I also have Line Magnetic 508 which was made in Chinese.

Although stock tubes were not terribly bad, as soon as I changed them with Nos tubes, sound improved significantly.
@blindjim 

It is interesting to go through your experience.

Tube amp has some kind of unique magic.

But it also requires careful system matching.

I am having lot of fun with tube rolling.

With Nos tube, the sound change immediately.


Keep you efforts.
Tube rolling with Nos tubes is fun.

If you want to get the best out of your tube amp, then you shall do tube rolling.

I order Nos tube from Ebay dealers who offer unconditional return.
@lowtubes

Many new issue KT88 tend to sound unrefined compared with El 34.

But there are also good KT88 like Golden Lions.

New issue Tungsol 120 has overall good sound.
@genez

These days sound quality of some Class D amp got improved significantly.

But it is unlikely that SQ of Class D amp will  surpass that of tube amp.

Tube amp have strength in warmth and roundness of timber.


@yannduquenne

Thanks for sharing your experience


You may need tube rolling for your tube amplifier.

If you change the input tube with Nos RCA or Amperax, then it will sound well for trumpet.
@ja

You are still using the tube amp you bought in 1996.

That is amazing.

It is going to be classic so you can keep it until you die.
@facten

I also have Line Magnetic 508 which surprised me by the quality of sound.

Chinese tube amplifier can not be ignored.
If you open the top of the amplifier or look into manual, you can find out what kind of tube is being used.

I recommend you to buy Nos(new old stock) tubes around 50$ and change the tubes.

If you are not familiar with changing the tube, you had better get the advice from some French audiophile around you.
@ramtubes

I did not know Jadis 500 had such lot of shortcomings.

Thanks a lot for providing me with useful information.

It may be crazy to use such monster amplifier as one’s first amplifier.

But it was memorable experience.

It gave most deep and powerful bass at my home to drive B&W 801.
@mountz 

If you have 86 db/w speaker, it will not work well with SET amp.

You had better get another speaker for SET.

One guy bought Line Magnetice 805 SET amp(48watt) and then had been looking for optimal speaker now.
@mountz

You also had monster mono block tube amplifier with 12 tubes each.

I had similar experience to your. It was hard to use it during summer time.

After going through monster, you now lust for 845 tube.

I also have Line Magnetic SET tube amp using 805 which sound wonderful.

I heartily recommend you try SET amp which has a magical mid range.
I have two speakers.

First one is Lansch 4.1 with 99db/w and second one is Vaughn  Cabernet speaker 93db/w.

Both have active woofers.

Lansche go down to 20Hz, Vaugn to 28hz.

I recommend Vaughn speaker to you for SET.

If you live close to Seattle, you are welcome to drop at my home for listen.
@firstcat1

I agree with you tubes produce "music" to ears.

Tube amp tend to give the impression that live music is played in front of you.
@lowtubes

My most favorite tube is Western Electric 300B original made in 1930's.

I still keep it.


The second most favorite is Tungsol KT120 which has a good dynamics and balanced sound.

I also like Nos Telefuken 12AX7 and Amperex Sn7.


@ unreceivedogma

You had experienced tube amp at early age and had gone through lot of interesting tube amps.

I had not listened to OTL tube amp, so I am curious about it.

Maybe I may try out OTL amp if good used one come out at reasonable price.
@ unreceivedogma

Thanks a lot for valuable information.

I am not sure whether OTL tube amplifier mate well with my speakers.

Thus If I buy used one, I can take less loss even if I decide to sell it again.
@ atomheart411

It is very nice of you to give your experience as recording engineer.

Tube amplifier  sound more real than SS amp.
I heard that OTL tube amplifier has an excellent transparency to be suitable for planar speakers.

For the time being, I am happy with my Line Magnetic 508 SET amplifier with magical mid range sound.
Lot of interesting discussion about OTL amps.

If I find used one at nice condition, I may want to try out to find out how they sound in my system.

But without knowing system matching, I will not venture to try new one.
I will consider Atmosphere if I try out OTL amp.

Ralph has a good reputation supporting his customer.
@vegasears

You started with Jolida and ended up with VTL 450.

You may  try KT120 tube with VTL if it is fine after contacting VTL.

KT 120 tube give deep bass with wide and deep soundstage.