[wazzupi]

I think it is to show you have 3 impedance settings on the amp to match a wide variety of headphones and in order that the headphones are not adversely affected in regard to their frequency response.

Either that or they are an air force display team........

is there any pros/cons to skipping the input transformer ?

 

[Andykong]

is there any pros/cons to skipping the input transformer ?

The input transformer converts balanced (XLR) input signal to single-ended before feeding to 6SN7. If you are using HA-300 XLR input. then you must go through input transformer, there is no other choice. On the other hand, if you use RCA input, you'll by-pass the input transformer.

 

[wazzupi]

The input transformer converts balanced (XLR) input signal to single-ended before feeding to 6SN7. If you are using HA-300 XLR input. then you must go through input transformer, there is no other choice. On the other hand, if you use RCA input, you'll by-pass the input transformer.

I have a XLR to rca adapters what's the difference of connecting XLR cables to rca adapters into the rca?

 

[Andykong]

I have a XLR to rca adapters what's the difference of connecting XLR cables to rca adapters into the rca?

I suggest you use XLR input of HA-300, the input transformer in the amplifier should do a better then job then a passive adapter when converting balanced signal to single-ended.

 

[dadracer2]

What I wondered was if Cayin themselves or other HA300 owners have some recommended 6SN7 tubes to upgrade the amp. I am looking at present at the PSVANE range which seem to get a good press and have an excellent 6SN7 option but there are many others out there such as Tung Sol and so forth. Alternatively if there is no real recommended tubes and it is just a case of finding what the individual prefers from a sound quality then that's fine.

 

[musicman59]

IMO the best sounding 6SN7 is the NOS TungSol Round Plates/Black Glass. Another nice one is the Sylvania short bottle Brown base and Chrome too.

 

[dadracer2]

IMO the best sounding 6SN7 is the NOS TungSol Round Plates/Black Glass. Another nice one is the Sylvania short bottle Brown base and Chrome too.

Thanks, I will check these out.

 

[wazzupi]

IMO the best sounding 6SN7 is the NOS TungSol Round Plates/Black Glass. Another nice one is the Sylvania short bottle Brown base and Chrome too.

TungSol Round Plates/Black Glass is this the Sylvania one?? Metal base? Or am I confusing it

 

[musicman59]

Yes, you are confusing them...
Here is a picture.

 

[musicman59]

These are the Sylvania...

 

[wazzupi]

These are the best Tubes i've ever heard.

 

[musicman59]

Yes, those Sylvania supposed to be pretty good too but I have never tried them. They are difficult to find.

 

[wazzupi]

Yes, those Sylvania supposed to be pretty good too but I have never tried them. They are difficult to find.

I paid $200 for 1 and it broke after a month (after the return policy) and the guy sold me one for $110 cuz it broke, but he doesn't have anymore now . i see a few on ebay.

ps this is when i had a Glenn OTL amp and only need 1

 

[dadracer2]

I am getting all the love for the large variety of NOS 6SN7 out there but it is difficult to know what to choose and also to determine the provenance of these valves. Does anyone have a good recommendation of a new/modern 6SN7 as I would feel a bit more certain about them and also if they were to expire at least I would have some warranty.

 

[wazzupi]

I am getting all the love for the large variety of NOS 6SN7 out there but it is difficult to know what to choose and also to determine the provenance of these valves. Does anyone have a good recommendation of a new/modern 6SN7 as I would feel a bit more certain about them and also if they were to expire at least I would have some warranty.

Hmm I tried to go this path with the tung sol from upscale audio I truly disliked the tubes and I paid for the highest quality version, cryo. I'd like to know as well, is there a tube that's new production, sounds really well ??