Welcome (soon) to Susvara world Wes. It has been in production for 7-8 years with only minor upgrade (cable jack from 2.5 to 3.5) without any Mk 2/3/4 and so on. Others top tier cans have made many upgrades. It means something, right. I have listened LCD5, Dan Clark, ZMFs, 1266 with HA-300...

@Alenotta reading this, I am almost certain your amp is not normal. Could be the 300B or something else inside. I beleive you should bring it to the dealer

Is it also hum with planar hp? You can also try these : 1. Use coax/toslink/AES EBU instead of usb to DAC. 2. Reduce voltage out from DAC to 2V. 3. Use preamp (preferably solid state) instead of direct from DAC

Nope. Fuses don't make noises. 1. Replace tubes - eliminates bad tube problem. 2. Disconnect cables - ) ground loop. 3. Test in dealer -) bad power lines, radio interference. What you haven't tested left only with transformer and internal parts. My 2 cents

I don't read all the posts, if you have replaced all the tubes, disconnect every cables and the hum still there. You better try it in the dealer. If it is still there I suspect there is a blown resistor or other parts malfunctioning.

I used to have hum with dynamic hp , PS1000e, Atrium and VC. Dead quiet with Susvara and Empy. I did this to eliminate it: 1. Put Finite Elemente - Ceraball underneath the feet. I also slip a sorbothane gel between ceraball and feet. First it acts like extra suspension and also makes it not...

@Wes S when can you send me those 6SN7 & 22DE4..😁😁😁

It will do make a change but not as significant as main fuse

You shld use T1.6AL - 250V

Can't agree more Andy...keep up the good work Cayin... Happy New Year 2023 every one 🍻🍻🍻

When I choose an tube amp I always try to catch what is the designer's sound signature, besides its technical things of course. Is it in conjuction with my taste, my type of music, upgrades option etc etc? If the basic is good, the upgrades is easy and will satisfy you more each day/ each...

Another step up besides tubes rolling is replace fuses. Try Synergetic orange / blue or other brand. @Wes S already gave his impressions somewhere in this thread.

Mostly are too general. Why not just share music that can expose, bring out Susvara's at its best? 0.2 cents

Sorry to hear that. Old WE used to be known for its reliability, long lasting tubes. Congrats for your Takatsuki, IMO it is one of the finest 300B.👍

So do I. Done a little tweak, use TS black plate for the driver, and 2x GE 22DE4 for rectifier. The stock Tungsol 6SN7 are good as well. It is a good combination for Susvara. I am going to have Audio Note 4300e soon. I will not go down with Elrogs I think. Had bad experience with Elrogs 300B...

Yes I know, you have AHB2 for Buchardt and HA300 for Susvara 👍👍👍

Yes I have heard Audion Silver Night 300B (8w) with Rogers LS3/5. Like you said don't expect slamming bass, play orchestral music and must be placed in small room. I recall It sounded quiet nice. The Rogers could produce nice vocal and crisp treble. Midrange not bloated and heavy like most...

88 db @ 4 ohm is too heavy for a 300B SET amp to drive. I guess Buchardt min power requirement about 50w @8 ohm. You will hear only midrange and midbass dominant in the reproduction. Loss the dynamics, shrinking staging and miss the extended high and low bass. CMIIW. You need at least...

I have sold my GT a few months ago, so as far as I recall, linear power has tighter bass, slightly deeper staging. Super charger is a good switching power supply as well. It will improve SQ from the stock SPS, you won't be dissapointed.

I never heard 2A3 headphones amp before. For speakers, 2A3 has smaller output around 3-3.5 watts @8 ohm while 300B around 8-9 Watts. In general, 2A3 has flatter response than 300B, more transparant, open and more neutral mid. Bass is more controlled but not bigger, depends on the speakers'...

How about ECC33? Is it safe for HA300?

I have had several 300B SE amps before for my speaker setup. They all have classic 300B sound, gorgeous midrange, intimate, deep 3D staging, smooth treble, less hard hitting bass. I like this Cayin HA300B because it has what I am missing from classic 300B amp -) extended crisp treble, deep...

Yes you can. I use 2 GEs and 2 RCAs

Awesome. Like Wes said it's so versatile you have plenty of choice for your enjoyment. I have tried some planars like Susvara, Diana TC, Empyrean, they're all very quiet. Except LCD5, still can hear it barely if you concentrate finding it.

Yes agree, XLR much better than 4.4 mm. The single ended is also marvelous with my grado. Vocal sweeter & intimate. Thou you still can hear noise for 90db headphones.