@Andykong : Thank you very much for your reply. I totally agreed with you regarding to NOS condition. For Duelund cap mod, it was just applied on September 2023 per link (...

Hello, I need your help. How long is the lifetime of your new pair of 6SN7 on HA300? Mine is only 1.5 years for each pair ( < 3000 hours - PSVane CV181-TII and LinLai E-6NS7.) . Since I'm working from home, I normally use my HA300 from 8 AM to 5 PM ( connecting to DAC via PC USB ) ...

After checking this forum, some members ( such as @Wes S ) use "UX4 Socket Saver" to raise the 300B position. However, the one with ceramic base is out of stock. Another left on eBay may not be ceramic ( https://www.ebay.com/itm/191603382856 ) . However, I found something quite similar (...

I just bought WE300B and installed it an hour ago. I found that my tube on right channel is lean to right as image. I found the cause from a golden pin of WE300B tube base per image. I checked on WE website. It's "bayonet pin". It is for being mounted in a Western Electric 100M, 115B, or...

Because of Black Friday sales, I will buy a FAW Noir Hybrid for my T5.3. However, the page choice is for T5p Gen 2 available. I'm not sure whether the connectors of both models are same. Please confirm. Thank you in advance.

Did anyone try this 6SN7 tube from GrantFidelity? You can see from its shape and size. I'm sure whether it will fit into HA-300. Initially, I checked the range between center of Left/Right channels. It's around 6.5 cm if I measured correctly. However, I think it might get too close to 300B as...

Understood, but like I mentioned before that the wire length does not give us many choices.

I think you mean what llamaluv did on this link : https://www.head-fi.org/posts/16779526. You may see that his Duelund capacitors wires are longer that mine. The distributor owner explained me that the new Duelund capacitors wires length are shorter than old version. I think that's why he put...

Thank you for mentioning that FFzz. I already forwarded your comment to my distributor. However, it seems that he moved the resistors to the side before placing capacitors into those spaces per below image. Before : After :

After spending time with HA-300 V.1 for 4 years, I decided to upgrade capacitors ( to Duelund Capacitor CAST-PIO-Hybrid Cu/Ag ) , power supply cable ( to shop OEM ) and input connector ( to Furutech FI-03 Gold plate, unluckily Rhodium is out-of-stock ) yesterday at my country distributor...

Sorry for interrupt between your discussion. Did anyone try between PSVANE Acme 300B and new Western Electric 300B? ( I currently use Acme 300B ) If the sound differences aren't not too much. I might take the leap to Elrog ER300B-MO. ( FYI : Thomas told me that TM300B is out-of-stock and will...

Did anyone try Audio-GD DI-20HE as DDC for Wavedream? Does it work with Wavedream? Thank you.

I just bought Melz 1578 tubes from don69-andy via eBay. A tube has an issues ( up/down volume with noise ) at first. After reinserted and swapped between left/right, the volume is back to normal and noise is improved, but still noticeable. Seller recommended soldering the leg will resolve the...

May I ask why you choose Edition XLR instead of Signature RCA? The latter's price is higher than the first's for not too much. Thank you.

Thanks... VanHai. I also looked on these tubes and asked about it previously. I got feedback per link ( https://www.head-fi.org/threads/the-reference-6sn7-thread.117677/post-17608979 ) If its sound is quite bright, I would like to skip them.

https://www.ebay.com/itm/165712220245 . Per above link and detailed information, Does it have enough information to make decision to buy them? I'm new for tube info. Seller told me that he provides 1 month warranty. Thank you.

Thank you very much for clarification. However, the item you recommended from eBay sales in pair instead of quad per detailed description. Do you think the cheaper 6H86 is suitable for the price?

I'm looking for a paired Melz 1578. I found these two, but the first's price ( 450 USD ) is around twice of the second's ( 250 USD ) . Please suggest which one I should pick. Thank you.

Luckily, seller just allowed me to cancel my order. He also mentioned that he already tested between with and without holes versions. He could not find the differences in sound. Let me check more on 6SN7 thread per your suggestion. Thank you.

Thank you ... ARCXENOS. Unfortunately, I could not cancel the order in the system now. I will try to contact seller if I can cancel the order.

Yesterday, I purchased Melz tubes. I thought they are the same Melz 1578. However, I just recognized that there are no holes on Anodes. Could anyone please confirm whether they are Melz 1578 ( https://www.ebay.com/itm/266255587785 ) ? Thank you.

All, I just contacted Rockna about how to adjust volume control of Wavedream for matching output voltage ( Vrms ) like 2V ( RCA ) and 4V ( XLR ) . Andrei from Rockna answered me as below " You have to only lower the volume by three 0.5dB steps for the desired max voltage level...

Hi everyone, I have HA-300B MKI. I'm looking for a new DAC for it. Rockna Wavedream ( Signature RCA ) is the one I will choose. However, its Vrms max out is 3.53 V ( RCA ) and 7 V ( XLR ) , while standard Vrms in for HA-300B should be around 2 V ( RCA ) and 4 V ( XLR ) if I understand...

I think its sound is in the same tone as dCS and Esoteric, but better in control. I’m not in some music genres like classical so I encourage you to try it yourself. I guarantee it will worth your time. It has quite unique sound.