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Legend Mono Block
PSE 300B, SE 300B, PSE 2A3, SE 2A3 Power Amplifier
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| Single 2A3 | 3.5W | $2,800 USD |
| Parallel 2A3 | 8W | $3,000 USD |
AudioNoteKits is please to announce the long awaited new Legend Series Single-Ended Triode MonoBlock Power Amplifiers! Audionote's design uses a similar configuration to the Interstage MonoBlocks but with a single tube driver in a capacitor coupled pentode configuration. These new MonoBlocks are shorter in length than their big brothers and are the ultimate in "single tube driver" SET amplification. Simplicity is the key to the circuit and the amps deliver that gorgeous zero feedback single-ended triode amplification.
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The blocks can be ordered in either 300B single (8.5W) or parallel (18W) configuration driven by the specially selected 6SH7 driver tube. The classic 5U4G rectifier tube smooths the AC for the Legends MB power supply. DC filaments and a large 300MA power supply choke installed inside the chassis assure a dead quiet operation!
The new Legend Series comes standard with our new Copper Insert plates and ultra high quality Black teflon valve bases throughout! The Legends are a pure power amp with approx 2V sensitivity and ideal when mated with either our L2 or L3 Pre-amplifiers. The Power Supply comes with a100+100uf 450v Mundorf 35mm electrolytic standing up right at the back of the chassis and a 30uf 600v Mundorf installed inside the chassis on the ceramic tag strip. Two .47uf film caps are installed inside the chassis along with about 12 resistors. Our expert wiring guides show the novice builder the ideal routes for the wiring. The same Mains transformer is used for either single or parallel operation with different taps available for each unique configuration. Available as a Single 300B tube MonoBlock or in a parallel configuration, the Legends will show off Single Ended 300B tubesound in all its glory! 15" long, 9.5" wide and stands about 8 inches high including feet and transformers! The luxurious copper insert plates, 3mm aluminum chassis, black Teflon valve bases exudes quality. Then there’s the sound!! The Legend delivers outrageous single ended glory. Targeted at higher efficiency speakers - the crystal clear detail of 300B SE will have you clinking your red wine glasses in approval. |
The 6SH7 is configured in a pentode configuration in the Legend MonoBlock giving it the capability to successfully drive the 300B tubes for parallel or single configuration.
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The build is exciting - you will mount a large choke transformer inside the chassis to start and then the Mains and OUTPUT TX on the top of the chassis. The mechanical aspects are fun and we guide you through the process with our stainless steel metric hardware throughout. The wiring needs to be compact but our expert wiring guide will lead along the right path. The copper Insert plate can be worked on standalone outside the chassis and then installed for inter-wiring. Use our large schematic provided, color inter-wiring graphics and ultra hi-res photos on disk to check over your work!
Some simple voltage checks are required to make sure your amp is working properly from a DC standpoint - then use our AC 1Khz CD & 8ohm dummy load to check over the audio signal path and gain. Once everything checks out you can be assured of a properly working new amplifier! You are then ready to test out your amp on a set of speakers! We are here for any support or guidance either through email or phone!
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Power Supply
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The Legend Power Supply has been designed for ultimate sonics - lightweight and snappy!
Our new T-195 Mains transformer supports taps for both single and parallel configurations. The classic 5U4G tube rectifier circuit sees a 30uf Mundorf PS cap mounted inside the chassis along with a monster 300ma choke to smooth the rectified AC. A single 100+100uf (35mm diameter) Mundorf capacitor stands solo at the back of the chassis and steps the voltage down for the 6SH7 driver tube - the ultimate in simplicity! |
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The Build
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When building the Legend MonoBlocks you start by mounting the CHOKE inside the unit and use countersunk screws to secure to the chassis. Once mounted you then will install the Filament board heat sink and power supply ceramic tag strip inside the chassis. Then you install the large grommets for the 3mm thick chassis and start mounting your Mains and Output transformers on the top of the chassis - you will start to see the amplifier taking form! Once the entire mechanical install is completed you can install the power supply valve base & external capacitor 100+100. The IEC section is nice and easy with pre made twisted cables - follow the expert wiring diagrams to layout your power supply wiring. Then you start working on the Filament Board - this section takes AC from the Mains and converts to DC for the 300B filaments! Finally you can start working on the Front insert plate that you can do outside of the amplifier - once this is complete, you install the insert plate inside the chassis mounted on the tang strips and prepare for the final inter-wiring steps - connecting Filament and grounds & HT!
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Once the unit is complete you will want to do a series of ohm checks to make sure that all the wiring checks out. Then you can follow our power up guide which takes you step by step through the power on process to make sure fuses don’t blow, filaments start turning on and HT voltage checks out - with a couple of DC voltage checks followed by an AC signal amplification test with dummy load you can be assured that your amplifier is ready to go - any problems during the build and you can contact AudionoteKits for support and debug assistance!
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We provide easy to follow, step-by-step wiring instructions with the manual.
Check out the detailed wiring Guide for the 300B PSE version of the Legend MonoBlock by clicking on the wiring image on the right. |
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Standard Configurations and Pricing
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NOTE: Prices are for a pair of Legend Mono Blocks (a Right and a Left Chassis)
| Legend Mono Block Parallel 300B | $3,050(USD) |
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| Legend MonoBlock Single 300B | $2,850(USD) |
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Same as above configuration but delivering 8.5W
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The Legend sounds beautiful, the amp was used over the weekend but with LP's it's what you hear that was never spotted before, there is this dimension of sound a separation of instruments and what is more amazing is you can tell the difference between string double base and say fender base! the vibration of the string and its continuing decay is heard instruments are placed and distinguishable.
Yes I'm chuffed.
Les
Have completed the build of the Legends and have been listening over the week, I have got what I had hoped for,big effortless sound quality with firm bass definition and individual instrument placing,vocalists are superb with a large image between the speakers, close your eyes and the stage widens even more!
After Christmas will be coming back for the L3.
Les Golder UK
I have finished both amps and they are now in my main room playing. Very, very nice. The bass is amazing. Tight, well controlled, just like being in front of a bass man in a club! Wow. Everything else is working beautifully even though it has not had a chance to settle in, as in capacitors, transformers and tubes! I can hardly wait! The sense of air around performers, detail, speed and sheer punch is simply amazing! I am seriously looking forward to what it will sound like with a few hundred hours of run time!
Thank you Brian for this little gem you're offering! It's a keeper!
Michael Hardyman
| Legend Mono Block Related Links | |||
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