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Found 14 results

  1. I am not an expert on tube amp like many on this forum however writing this blog to help those who are thinking of buying Willsenton R8 or those who owns it and want to know bit more about it. I am not good with ears as Audiophile guys but can provide some technical insight. Initially I was thinking of building my own tube amp as I am a keen DIYer but then looked on the net and saw hype about R8. Pulled the trigger in the hope that it is Point to Point wired amp so if not good, I will enjoy modifying it rather than building from the scratch. Received my amp 5 days ago and first thing I did is that I opened up back cover before even trying it out. I was curious to know the quality of soldering, and the internal voltage switch is correctly set to run on 240V. To my surprise, it was great. I did not have to re-solder any point, all the components used are of good quality, relays and electrolyte caps are of reputed Japanese brands. Coupling caps and Grid bypass cap in driver stage are own ‘Willsenton’ branded but looks good (and looking at the way it sounds, I don’t think there is a need of replacing those with better branded caps or PIO caps). All the components and cables are laid out properly and tied together. The only flaw I found was that the outside sticker displays 240V but the inside voltage selector switch shows 230V. Also, I could not see Capacitor discharge resistor on main filter caps. After satisfied with the build quality, I connected the amp to my system and wow… it sounds amazing and better than my other tube and SS amps. It is dead quiet when no signal and the sound is just clean, open and excellent coverage at both bottom and upper end. While it was sounding great, I found that the outer casing of power transformer was warming up a bit. The casing felt like a thick sheet of metal hence was bit concerned about the actual temperature of the transformer itself. Also, the bias was bit on the higher side when I checked first time which created the doubt that they have actually used 230V trannie and just put the sticker of 240V. However, with these concerns in the mind, I decided to partially tear down the amp over the weekend to check the Power transformer rating, measure all voltages, trace down Schematic and install a discharge resistor on the filter cap. Supplier sent me the Schematic but it was too basic and wanted to confirm that it is accurate. Below are my findings. About 30% of resistor values in amp are different to actual schematic. The capacitance multiplier circuit is also different and there are some typo errors as well. I ended up drawing my own. Transformers are potted in the casing (which is a great thing) hence did not remove those as it would require de-soldering of too many connections. However, when measured the heater voltage, it was precisely 6.33V at my home supply voltage of 245V which indicates that it is a 240V transformer and switch labelling is not correct. The potting of transformer also explains that the heat on the casing is a conduction from transformer and not the radiation (which would be in case of hollow casing), so nothing to worry about it. Potted transformers also explain why this unit is so heavy and outer casings feel like made of a thick metal sheet. KT88/EL34 switch changes the negative Grid voltage to power tubes and calibrates front Bias meter. I was expecting this switch to change the B+ voltage for different tubes but that’s ok, you can’t get everything at such a low price. B+ measures about 440V. This is optimum for EL34 but KT88 would have performed better with bit more voltage of about 500V or more. The soft start delay circuit does not delay B+ supply voltage to tubes but rather mutes input signals for 30 seconds after turning it on. At least something is better than nothing. I am not 100% sure about the Pre-IN input but I think it is not directly fed to driver stage bypassing pre-amp section. It still goes through pre-amp and volume control is bypassed to mimic the Power amp only condition. I do not use this input so didn’t bother going into further details. The designer has taken great efforts to minimise noise in the amp by adopting Capacitance Multiplier using tubes to remove ripples from the supply voltage before it is fed to Pre-amp tubes. An elevated heater supply using virtual ground is also used to heat preamp tubes to prevent humming. 6SL7 are great tubes for audio application but at the same time they are high gain tubes and hence prone to noise and humming. With implementation of these 2 measures, amp is extremely quiet and noise free. The elevated heater supply circuit also works as a capacitor discharge and no need to add additional resistor on the cap. I measured that after turning off the amp, there is hardly any voltage on power caps within 3 seconds, so it is very safe from that point of view. One drawback of this amp is that it uses digital circuit for input and TR/UL selection but there is no memory function. If you are using CD as an input source and TR mode, then you do not have to do anything. For anything else, each time you turn on amp, you will have to select the source and the mode. A simple rotary selector switch would have been a better option here. In conclusion, this is a great amp as a value for money. I am not an audiophile and do not own too many amps so I would leave those reviews and comparison for Youtubers but from the technical point of view, you will not get anything better sounding and better-quality product in this price. Looking at how it performs in bottom and top end, I am sure that the output transformers are also of great quality which is heart and soul of any tube amplifier. I don’t’ think spending thousands of $ and buying Prima Luna or something like that will give any kind of added benefits. Just roll few tubes on this and it will shine like those branded amps costing multi-folds. This is my personal opinion considering my own circumstances and others may have different opinion and I respect that as well. As a summary, it is nicely designed for flexibility of tube rolling, manufactured with quality components, built with care and professionalism, very reasonably priced and most important, it also sounds great. Waiting for lock down in Melbourne to open so that I can try some tube rolling :-). Cheers,
  2. Further information: Purchased this amazing R8 just last year Oct 2020 , got it from Aliexpress(audiophile amplifier store) for $1660, this is a special order with 240v transformer which I had to wait an additional month for it. I bought it because I was interested to compare with the Muzishare X7 , after the comparison I settled down with the X7, so I estimate the usage/runtime on this R8 not more than 30hours in total ! For the last 8 months it been eating dust in my listening room , so I finally made up my mind to sell it. Overall it is AS- new ! itself been very well taken care of , no scratches or marks, and it lives an easy life powering a small bookshelf. This comes with 4 stock Willsenton el34(one of them the guide pin is broken as I was not careful when removing one of them, but doesn’t affect its ability to perform) , stock 3 6SN7 and 2 6SL7. I'll also throw in 3 x as-new tungsol 6SN7 which I bought(from the valve store for $120) similar time I got the R8, so probably haven't fully run-in yet I've all the original packaging , but at this stage im looking for local buyers only , pick up from Maribyrnong Vic Any questions ask away. Photos: PLEASE READ If you include any reference to pricing whatsoever in this section (excluding RRP), your ad will not be approved If you are advertising multiple items, you must post one bulk price only, or post seperate ads for each item If you don't include photographs of the actual item being sold, your ad will not be approved You understand that a reasonable donation for selling fees is expected upon successful sale of your item - if you have previously sold items and not made a donation, your advertisement may not be approved.
  3. Further information: Melody EL36S was just serviced By melody and tubes only have 8 hours of play on them. i have the box it came in Aswell. pick up only due to the amp weighing 35KGS Photos: PLEASE READ If you include any reference to pricing whatsoever in this section (excluding RRP), your ad will not be approved If you are advertising multiple items, you must post one bulk price only, or post seperate ads for each item If you don't include photographs of the actual item being sold, your ad will not be approved You understand that a reasonable donation for selling fees is expected upon successful sale of your item - if you have previously sold items and not made a donation, your advertisement may not be approved.
  4. Right now there seems to be a wealth of opportunities in the realm of tube audio here on SNA. Lots of top quality gear at excellent prices. Or am I biased, having just gone further down the tube path?
  5. Further information: Selling my Bob Carver 350 Mono Amplifier, the amplifier was custom made in 240 Volts specifically so there is no need for a step down transformer. The condition is excellent hardly used, build quality is super,and each amplifier is individually handcrafted in the USA by "Tubular" Joe Bonin. Both amplifiers are finished in a lovely crimson red colour which looks absolutely superb. Due to inherent design of the amplifier the Power Tubes which are the KT120 have a increased lifespan and run much cooler. In terms of power, the amplifiers are rated at 350 into 8 and 400 into 4 more than enough power to drive the most difficult of speakers. I have all the original packaging so shipping should not be a problem. If you have any questions or would like further information please do not hesitate to contact me. Price is Negotiable. PLEASE READ If you are advertising multiple items, you must post one bulk price only, or post seperate ads for each item If you include any reference to pricing whatsoever in this section (excluding RRP), your ad will not be approved If you don't include photographs of the actual item being sold, your ad will not be approved
  6. Further information: Up for sale is Yaqin MC 100B Integrated tube/Valve amplifier in excellent working condition along with $300 worth of upgrade. This is a true duel mono block amp having 2 seperate power transformer for each channel (hence there are 4 transformer rather than 3 which are on most of tube amps). Pre-amp tubes have been upgraded to Electro Harmonix 12AX7 Coupling Capacitors have been replaced with Mundorf MCap Supreme 1uf. Capacitors are so big that they had to be mounted on chassis rather than the PCB (check photos). These 2 upgrade make this amp comparable to high end tube amplifier. A great sounding amplifier, ready to drive any speakers even less efficient speakers. FEATURES: Preamplifier uses SRPP amplification circuit and Nagao-type inverter, Cathode output circuit to promote. TWO connection mode: Ultra Linear Amplifier (UL) and triode (TR). Duel Mode: INTEGRATED AMPLIFIER mode or pure Power AMPLIFIER mode. The output transformer use audio special alloy and high strength Anaerobic enamel-insulated wire. It uses special coiling process. This amplifier is made with audio special Enthusiast electrolytic capacitor (MKP), capacitive cross-linked and high quality metallic resistance. SPECIFICATIONS: Performance Index Output power: 30W×2 (8O) Triode (TR) connection 60W×2 (8O) Ultralinear (UL) connection Distortion: =1.5% Signal noise ratio (SNR): =90dB (A) Frequency Response: 5Hz~80KHz (-2dB) Input sensitivity: INTEGRATED AMPLIFIER mode: 0.25V / Power AMPLIFIER mode: 0.6V Vacuum tubes: KT88×4 6SN7×4 12AX7×2 (You can also replace it with 6550EH×4 6N8P×4 6N4×2) Dimensions: 390mm x 490mm x 190mm Weight: 30kg I have original box. Pick up from Narre Warren. Happy to post with buyers expenses and arrangements. Photos: PLEASE READ If you are advertising multiple items, you must post one bulk price only, or post seperate ads for each item If you include any reference to pricing whatsoever in this section (excluding RRP), your ad will not be approved If you don't include photographs of the actual item being sold, your ad will not be approved
  7. Further information: I'm doing a bit of a cleanup, and have some gear that has reached the point of needing to be sold (thanks to all the sellers' items on here that have caught my fancy lately). This MF X-Can V3 was bought over 10 years ago and had its caps and tubes upgraded prior to purchase. Details about the mods that were done to it can be found in this thread and described by user 'deadie' whom I bought it from: https://www.head-fi.org/threads/benny-pimped-my-ride.190320/ - I paid around USD$400 at the time, and I have no idea what kind of market value it'd have today. In addition to the US power adapter, I also have UK adapter, and a UK->Australia converter, so you can use this in quite a number of countries with the additional bits. I believe I'm asking a very fair price on these, but feel free to reset those expectations if needed. Photos:
  8. Further information: As new, purchase date 06/05/2020. So plenty of warranty left (invoice supplied). Great decent entry to tubes. Comes with upgraded matched pair of new 12AU7 tubes (Genalex Gold Lions, RRP $135) they sound much better than the stock ones. Upgraded them as one of the stock 12AU7 tube hisses more than the other one (bad match), happy to include them with the sale if wanted, you could also try to claim warranty on the bad tube as its still so new if you wanted, I didn’t bother as the basic stock tubes are only worth $25-30 new anyway.. Postage would be around $30-$40 due to the weight of this beast! Thanks. Photos:
  9. Further information: Open to offers and trades. Up for sale is the Cary Audio CAD120S amplifier with near new Mullard KT88 tubes (bought just before Christmas 2019) and stock 6SN7 tubes. I have original box so can arrange for shipping at buyers expense and risk. I bought this amp from a SNA fellow member. It sings beautifully everyday and night. It’s built like a tank and weight nearly 30KG. It has two modes which is switchable on the fly: triode (60w) (Laid back and smooth) and ultra linear (120w) ( bass bass bass). It will drive most of the speakers comfortably. The RRP of current model (CAD120s MKII) is AUD$9,999 so I’m asking for about 1/3 of RRP with near new tubes so it’s priced well to sell. Please note that this is a 220V version. I can supply a step down transformer at extra cost or you can buy one for about $300. The amp has a minor hum, I cannot hear it in the day time or during music playing. I can only hear it at quiet night and music not playing. The hum can be tamed down with good power cable and conditioner. it also has small scratch on the top of the transformer, not sure why, I don’t stare it after the first setup. Being so many tubes, it puts out a bit out heat, however only at a warm level, not boiling. You can put your palm on the transformer without a problem. There are lots of reviews on this amp, one from our own website: https://www.stereo.net.au/reviews/review-cary-audio-slp-05-preamplifier-cad-120s-mkii-power-amplifier Photos: Advertisements without photos of the actual item will not be approved.
  10. Item: Audio Note OTO SE tube integrated amplifier Location:3183 Price: 1900 Item Condition:good working order Reason for selling: too many amps Payment Method: Pickup - Cash, Paypal, COD Only Extra Info: The item is in good working order and condition. The amp recently was Refurbished. All capacitors were checked to meet requirements. This is a Class A amplifier. Output tubes 4 x EL84 (6P14P, etc), 10 watts per channel. All four EL84 tubes of power amp are new. Photos: Advertisements without photos of the actual item will not be approved.
  11. Item: WA7 Fireflies 2nd Gen headphone DAC/AMP, upgraded Electro Harmonix tubes Location: Sydney Northern Beaches, Sydney CBD, North Ryde. Price: $1050 o.n.o Item Condition: 10/10 Used but as new, packaged up in original box and wrapping Reason for selling: Looking to upgrade Payment Method: Pickup - Cash, Paypal, COD Only Extra Info: This amp is just beautiful, both to listen to and to look at. For the money, I think its one of the best out there. Pairs well with HD800S, Fostex TH900 and LCD-X or IEMs. 2 sets of tubes included, the stock from Woo Audio and the upgraded Electro-Harmonix. Purchased 2/5/2017. Very little usage. Have original receipt in pdf. Pictures:
  12. Item: Weston Acoustics Rare Black Matching Touchstone Pre Amplifier and Time Machine 300b tube mono blocks in gloss black over wood grain Perth WA Price: Price: $7000.00 .Original receipt shows over 12k including extra cables made by Earle, Upgrade to remote and Balanced with added inputs section. This amps hold their value better than almost anything and would be double or more if a European or US brand name was attached, they are stunning in everyway. They are that good and simply stunning to look at. These go or the PS audio BHK pre and power, one or the other as house to small for two systems. Item Condition: `Almost Perfect with spare tubes cannot spot any issues and all running smoothly and sweetly. Spare tubes for almost every tube on pre and mono blocks and no 6 month plus waiting list. Reason for selling: Change of direction. Extra Info: Pickup - Cash, Paypal, COD Only- prefer pick up as 3 very heavy boxes plus box of valves and chords etc. But can box and pack at buyers cost. Extra Info: Hand built to order as are all of Earle's master pieces. Earle's first set in Polished Black finish with heavy duty remote control for volume and has extra balanced inputs, very very rare 6 input Preamp. Have shots of them being built and as below. A Good Selection of spares tubes as well about an extra full set in total and supplied by Earle's own hand made RCA cables. Earle did not ever add remotes unitl i asked if possible and took 3 months to discover one good enough to be used on his beautiful products. Very regretful sale and can demonstrate in Perth. http://www.westonacoustics.com Perfect and as new without the very long wait list, 6 months or so and look awesome in black at night with the rest of the system glowing. Have instruction books and come with standard power cords as supplied by Weston Acoustics. Shipping possible at buyers expense and they would need all the tubes moved and boxed and then padded and packaged into 3 boxes each weighing 20 kilos x3 and tubes on top. `i would recommend a crate from a shipping agent that are not that much and well worth the peace of mind. Pre Amp Specifications.from website. mine are actually below in photo section and they are more powerful . 35 watts not 18. 4 x 300 tubes per mono block. Max Voltage Output ......5 volts rms. 14 volts peak. Frequency response.......6hz to >50khz Separation.......……….... >55db Signal to Noise............. >88db A Weighted Signal to Hum…….…......>68db Distortion.................…..<0.05% at 0.5 volt rms output Hum Level…………….......<0.1 millivolt Gain.............................6db Inputs………..…………......6 Outputs .............................2 Mono Block Power amp see actual SPECIFICATIONS sheets below these were from the website and did not not realise mine were so much higher. Power Output - 35 watts upgraded from 18 per channel pure class A Frequency response -3db - 6hz to >75khz Signal to Noise - >90db A Weighted Signal to Hum - >80db Distortion - <0.05% at 1 watt rms Hum Level - <3.0 millivolt Sensitivity - 500mV Input impedance - 62K Inputs 1 Speaker output 8 ohm (6 to 12 ohm is fine) Damping Factor >5 (20hz to 20khz 8 ohm) Weight ~20kg (~44lb) per monoblock. Dimensions 440mm x 370mm x 220mm (width x depth x height) per monoblock. Preamp very similar plus small box of tubes and cables. Pictures:
  13. Item: Weston Acoustics Rare Black Matching Touchstone Pre Amplifier and Time Machine 300b tube mono blocks in gloss black over wood grain Perth WA Price: Price: $8000.00 or very sensible close offers.Original receipt shows over 12k including extra cables made by Earle, Upgrade to remote and Balanced with added inputs section. This amps hold their value better than almost anything and would be double or more if a European or US brand name was attached, they are stunning in everyway. They are that good and simply stunning to look at. Item Condition: `Almost Perfect with spare tubes cannot spot any issues and all running smoothly and sweetly. Spare tubes for almost every tube on pre and mono blocks and no 6 month plus waiting list. Reason for selling: Change of direction. Extra Info: Pickup - Cash, Paypal, COD Only- prefer pick up as 3 very heavy boxes plus box of valves and chords etc. But can box and pack at buyers cost. Extra Info: Hand built to order as are all of Earle's master pieces. Earle's first set in Polished Black finish with heavy duty remote control for volume and has extra balanced inputs, very very rare 6 input Preamp. Have shots of them being built and as below. A Good Selection of spares tubes as well about an extra full set in total and supplied by Earle's own hand made RCA cables. Earle did not ever add remotes unitl i asked if possible and took 3 months to discover one good enough to be used on his beautiful products. Very regretful sale and can demonstrate in Perth. http://www.westonacoustics.com Perfect and as new without the very long wait list, 6 months or so and look awesome in black at night with the rest of the system glowing. Have instruction books and come with standard power cords as supplied by Weston Acoustics. Shipping possible at buyers expense and they would need all the tubes moved and boxed and then padded and packaged into 3 boxes each weighing 20 kilos x3 and tubes on top. `i would recommend a crate from a shipping agent that are not that much and well worth the peace of mind. Pre Amp Specifications.from website. mine are actually below in photo section and they are more powerful . 35 watts not 18. 4 x 300 tubes per mono block. Max Voltage Output ......5 volts rms. 14 volts peak. Frequency response.......6hz to >50khz Separation.......……….... >55db Signal to Noise............. >88db A Weighted Signal to Hum…….…......>68db Distortion.................…..<0.05% at 0.5 volt rms output Hum Level…………….......<0.1 millivolt Gain.............................6db Inputs………..…………......6 Outputs .............................2 Mono Block Power amp see actual SPECIFICATIONS sheets below these were from the website and did not not realise mine were so much higher. Power Output - 35 watts upgraded from 18 per channel pure class A Frequency response -3db - 6hz to >75khz Signal to Noise - >90db A Weighted Signal to Hum - >80db Distortion - <0.05% at 1 watt rms Hum Level - <3.0 millivolt Sensitivity - 500mV Input impedance - 62K Inputs 1 Speaker output 8 ohm (6 to 12 ohm is fine) Damping Factor >5 (20hz to 20khz 8 ohm) Weight ~20kg (~44lb) per monoblock. Dimensions 440mm x 370mm x 220mm (width x depth x height) per monoblock. Preamp very similar plus small box of tubes and cables. Pictures:
  14. Item: Weston Acoustics Rare Black Matching Touchstone Pre Amplifier and Time Machine 300b tube mono blocks in gloss black over wood grain Location: Perth WA Price: $8500.00 Original receipt shows j 12k including extra cables made by Earle, Upgrade remote and Balanced with added inputs section. This amps hold their value better than almost anything an would be double or more if a European or US brand name was attached, they are stunning, if they don't sell at this reduced price i will keep forever. They are that good. Item Condition: MINT with spare tubes for almost every tube on pre and mono blocks and no 6 month plus waiting list. Reason for selling: Changing to children friendly system and change of listening room. So a few listings all at once. Payment Method: Pickup - Cash, Paypal, COD Only- prefer pick up as 3 very heavy boxes plus box of valves and chords etc. But can box and pack at buyers cost. Extra Info: Hand built to order as are all of Earle's master pieces. Earle's first set in Polished Black finish with heavy duty remote control for volume and has extra balanced inputs, very very rare 6 input Preamp. Have shots of them being built and as below. A Good Selection of spares tubes as well about an extra full set in total and supplied by Earle's own hand made RCA cables. Earle did not ever add remotes unitl i asked if possible and took 3 months to discover one good enough to be used on his beautiful products. Very regretful sale and can demonstrate in Perth. http://www.westonacoustics.com Perfect and as new without the very long wait list, 6 months or so and look awesome in black at night with the rest of the system glowing. Have instruction books and come with standard power cords as supplied by Weston Acoustics. Shipping possible at buyers expense and they would need all the tubes moved and boxed and then padded and packaged into 3 boxes each weighing 20 kilos x3 and tubes on top. Pre Amp Specifications.from website mine are actually below in photo section and they are more powerful . 35 watts not 18. 4 x300 tubes per mono block. Max Voltage Output ......5 volts rms. 14 volts peak. Frequency response.......6hz to >50khz Separation.......……….... >55db Signal to Noise............. >88db A Weighted Signal to Hum…….…......>68db Distortion.................…..<0.05% at 0.5 volt rms output Hum Level…………….......<0.1 millivolt Gain.............................6db Inputs………..…………......6 Outputs .............................2 Mono Block Power amp see actual SPECIFICATIONS sheets below these were from the website and did not not realize they were so much higher. Power Output - 35 watts upgraded from 18 per channel pure class A Frequency response -3db - 6hz to >75khz Signal to Noise - >90db A Weighted Signal to Hum - >80db Distortion - <0.05% at 1 watt rms Hum Level - <3.0 millivolt Sensitivity - 500mV Input impedance - 62K Inputs 1 Speaker output 8 ohm (6 to 12 ohm is fine) Damping Factor >5 (20hz to 20khz 8 ohm) Weight ~20kg (~44lb) per monoblock. Dimensions 440mm x 370mm x 220mm (width x depth x height) per monoblock. Preamp very similar plus small box of tubes and cables. Pictures:
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