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Response Audio / Bella EXtreme has been working on some large ventures under the radar the past year.
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Recommended Tubes

We often get asked for recommendations for quality tubes to be used throughout our Bella EXtreme amplifiers as well as the many other products found throughout this and our retail website. We are not interested in stocking several different makes of tubes but we do listen to our customers. The tubes mentioned below have been mentioned several times to me by customers of our Signature and Reference Series products as well as owners of the many of the tube products currently on the market. Our personal experience with Thetubestore has led us to the point of being able to highly recommend their products and services. You may choose from any number of their available tube manufacturers if you have a preference.

Thetubestore, has no problem drop-shipping these tubes directly to us, Response Audio NY, at no additional cost for installation into your new product. Just use our address for the shipping address when ordering online from their site. We make nothing on the sale of tubes from thetubestore but rather offer this as a convenient service.

If we are custom building your amplifier, we will bias and test the unit with your new tubes installed.
   


Please follow this link to purchase tubes from Thetubestore.

If you are interested in ordering Tubes  from The tube store, it would be greatly appreciated if you could do so by clicking on this TUBESTORE logo above to place your order online.

Here is a list of some of the tubes our customers have commented on being their favorites in various products. You may also contact us for recommendations based on your personal listening habits and preferences. Please note that the order in which most of these tubes are listed is based primarily on customer favorites and do not reflect any influence from myself unless otherwise noted.

For a more "tube like" presentation, the Shuguang KT88-98 is the #1 choice providing exceptional detail and transparency while maintaining that seductive tube sound.

Musica Bella 3205 MKII & original

  • Svetlana EL34

  • JJ KT77

  • Electro Harmonic EL34

  • SED EL34

  • Shuguang KT88

  • SED KT88

  • EH6550 / KT88

Bella EXtreme 100 mono bloc amplifiers

  • Tung-Sol 6550 (see below)

  • EH KT88
    Very clean and articulate. Lacks the body of the Shuguang.

  • Shuguang KT88-98 (my personal favorite)
    Smooth presentation with a good sense of body and warmth without sacrificing air and extension

  • EH 6550

  • JJ KT88

  • Sovtek 6550

  • SED 6550

Bella EXtreme Custom ASL Hurricane mono bloc amplifiers

  • Tung-Sol 6550 (see below)

  • EH KT88

  • Shuguang KT88-98

  • EH 6550

  • JJ KT88

  • SED 6550

  • Sovtek 6550

Bella EXtreme Custom ASL Monsoon MK II  mono bloc amplifiers

  • Svetlana EL34

  • Electro Harmonic EL34

  • JJ KT77

  • SED EL34

Audio Note Custom M2 Preamp - lineboard

  • JJ ECC802s gold pin (my personal favorite)
    Very clean yet musical. On the warmer side of neutral

  • JAN JRC-12AU7 tube made by Raytheon
    A bit pricey but many enjoy it's characteristics

  • Electro-Harmonix 12AU7A / ECC82 Gold
    Very detailed and clean. A little on the lean side

Audio Note Custom DAC 2.1 Deluxe

  • JAN-Philips 6922 Low Noise

  • Electro-Harmonix 6922 Gold

 

Personal findings:

Like anything audio, tubes are very subjective and personal. There are many out there that frown upon Sovtek tubes (Russian) just as there are those who will not run a Chinese tube. Don't let anybody tell you one tube is better than another. This is your system we are talking about and they are not the one listening to it. If you come across a tube or combination thereof that you like, that is the tube for you regardless of what others say.

"Build your system for yourself, not the critics"

 

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The word on the street is that the new Tung-Sol 6550's are the cat's pajamas. I have not yet personally auditioned these but plan to very soon.

I have heard word that they can be ever so slightly noisy in some circuits. This is not a big deal to me as it is very slight and does not interfere with the music,

If anyone else out there is running this tube in one of our products, please feel free to drop me a line and let me know what your findings are.

 

 

 

Thetubestore also has some excellent selections for signal tubes used in the Ming-Da preamps such as those by Electro Harmonix, Tesla, Ei and even some NOS treasures by Tungsram, Mullard and many more.

                  
Shuguang KT88      EH KT88             SED KT88           EH6550

          
       SED EL34       EH EL34       

 
Click to enlarge

Click to enlarge

 

Power tubes:
For the emotional, seductive tube sound while maintaining detail, resolution and transparency, I have found good Chinese tubes such as the Shuguang KT88-98 to be among the best.
Looking for a clean, dynamic presentation? The EHKT88 fills the slot.

 If you are looking for a cleaner, more accurate and dynamic presentation while sacrificing a bit of body and fullness, the KT88 and Sovtek 6550 tubes would be my first consideration. I have found the Sovtek 6550 to be the most reliable tube ever made.

 Obviously tube choices are very subjective with everyone having their favorites. I have personally become quite fond of some of the Chinese output tubes with preferences leaning towards the Shuguang pieces for the warmer, more seductive sound. If you are a newbie to tubes, all I can do is recommend doing some reading on what others have found with various tubes and try to come to some kind of conclusion as to what would be best for you and your system. Every person is different as well as the components and systems these tubes will be incorporated into.

 Signal tube types:

 In this area, I personally do not find the small Chinese signal tube variations (12AX7, 12AT7 & 12AU7) to me liking. I do however, find their 6SN7 & 6SL7 tubes to be a good compliment with our amplifiers and this is what we run in our showroom. Below are a few quotes about their characteristics...... you be the judge. I do like many of the NOS (new old stock) pieces but do not like recommending these due to their high price tags and some compatibility issues. I would not like recommending these high dollar pieces only to find out that the consumer does not like my recommendation. I stick with current production units and leave the NOS experimentation up to the consumer.

 

".......Chinese manufactured Shuguang preamp tubes, specified by some of the top boutique amplifier designers. Highly regarded for their bright sound, high gain and very ample output......."

".........The Chinese 12AX7 is popular with Marshall owners for it's gain and bite. It is currently re-branded by both Ruby Tubes and Groove Tubes......"

".........This Chinese-made 6SN7 is used as original equipment in several amplifiers.
There are two versions available: one with a metal base and another with a brown base......."

 The 6SN7 is one Chinese input tube I do like and can live with in many applications.

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