Thrax Spartacus 300B
Pairs well with
Thrax Spartacus 300B
Product details
Spartacus 300B is a statement.
A masterpiece demonstrating how modern thinking applied to Directly Heated Triodes with advanced magnetic materials and a classic concept eclipses all other approaches.
It is an engineering overkill in all aspects based on the legendary Western Electric 300B tube.
It used six 300B tubes in 2 stages to deliver 50W of pure class A triode sound.
FEATURES
Custom current production tubes for long life
50W for ample power reserves
Low noise for subtle dynamics
Auto bias for compensation of tube ageing and correct operation of any 300B
Current sourced 300B Shunt regulator for stable power allowing explosive dynamics and transparency even on the hardest loads
Transformer input and output for galvanic isolation
Microprocessor controlled operation for safety
Special filament heating circuit for harmonic richness and tube protection
Highest quality torque binding posts protecting your cables
The input is a 300B tube driving 4x300B tubes in the output stage and a shunt regulator based on yet another 300B tube makes sure all signal currents go trough 300B tubes with no capacitor in sight.
Now for the first time you can actually hear what a 300B really sounds like and prepare to be amazed. Complimented by the finest nano-cystaline core output transformer, nano-crystalline choke power supply it really redefines tube amplification.
Spartacus features one of the simplest possible signal paths with absolute zero feedback (wire-vacuum-wire-vacuum-wire).
To achieve simplicity while delivering exemplary performance, each device in the signal path had to be the best possible.The legendary 300B tube was chosen. They are the most linear amplifying devices and some of the very best audio tubes ever made. It is a fact that the distortion of triode vacuum tubes compared to solid-state devices is orders of magnitude lower. Apart from the low distortion level, the type of distortion they produce is a consonant 2nd harmonic only. To go further we employ a technique to cancel the negligible distortion they would generate by running two of them out of phase effectively canceling each other’s distortion.
For this to work we designed a driver stage that would supply the two output tubes with exactly the same signal in phase for one and out of phase for the other by using another 300B.
It is loaded with a perfectly symmetrical phase split transformer with independent windings and screening providing separate bias to the output tubes preventing any interaction. Our proprietary ultra low noise current sourced shunt regulator makes sure noting moves unless it is supposed to. Not a popular approach at the voltages and currents involved as is extremely difficult to make. But infinitely rewarding when done. The most 300B tubes have considerably low voltage gain, so a step-up input transformer takes care of that. Look no further as there is no commercially available product coming close to Spartacus 300.
Specifications
FAQs
Please read our FAQ before sending us a message.
How is my order processed ?
Once we have received your order and your payment, we issue you an invoice that will be mailed to you with a reference number for your order. Once your order is ready : it will be dispatched to you with insurance and tracking number.
Which payment methos are available in the Online Shop ?
You can choose between Paypal, bank transfer or Credit Card. Please take in consideration that payment via bank transfer will slightly delay the processing of your order as we have to receive your funds on our bank account to confirm your order.
Why are there different estimated delays prior to sending for some of the products
One of the politics of Ana Mighty Sound is that every order is unique and made for a single customer. You will find next to each item an estimated delay prior to delivery. We will do our best to fulfill it before this delay (and most of the time we do).
Please keep in mind that we are a 100% human company working all over the Old World (Europe) and that we do commit to deliver you the best made / best quality product available, and to insure that : this can take some time.
Of course… some of our products are in stock !
Can I specify a courrier for my order ?
Yes you can ! Just drop us a line in the « additional remarks » of your mail order. This may add additional fees to your order. We can work with DHL, TNT, FedEX, UPS, French La Poste or Chronopost.
What if I have received the wrong item ?
In the very unlikely case this would happen just send us a photo of what you received and we will send you a courrier to fetch the item back. Once we have checked it out, we will send you the correct item.
My items are not up to specifications, what should I do ?
This is highly improbable as we use the most modern techniques to insure that our products are up to specs. In fact we even have a dedicated person checking that every single item is in perfect condition prior to shipping. Of course it can happen, but we doubt it seriously. In any case if you were bothered by something : just send us an email and we will sort it out with you.
I am very happy/disappointed with my order and I want you to know it ?
Please do not hesitate to drop us a line and we will be always happy to answer all of your requests. Our aim is your complete satisfaction.