World Audio Designs 300b monoblocks

[lordmortlock]

A pair of superb monoblocks for sale, as I find myself using an integrated amp more and more from a convenience/front room/family friendly POV.

Original sale thread below, push pull design, 26 watts into 6ohms. David/Juancho is a very well regarded electrical engineer and is well known on many of the forums. His original ad describes them pretty well but there are a couple of marks on the side which aren't visible in use. They sound fantastic and are fitted with the valves as per Davids ad, rather then the tjs pictured.



http://hifiwigwam.com/forum/topic/11...omment-2059386

I paid the listed £1200 but conscious the market is a little sticky right now, so offering them at a bargain £950

They're too heavy to send, so you're welcome to come, audition and collect or I'll drive to meet within a sensible distance.

[macvisual]

Jake, do you know if these are a push-pull design ?

Regards;
Peter

[Ali Tait]

They are parallel single ended.

[lordmortlock]

Hey Peter, hope you're well. Sorry, it doesn't look like the link to the original ad is working, so here's the text from David.

I originally built these WAD Monoblocs as my own amplifiers. Later I sold them to my friend as I made a 300b stereo amplifier but I've always had a soft spot for their sound. It's somewhere between a 300b SE amp and a push pull. In fact the original circuit was used for the WAD 300b SE mono blocks and changed for this push pull version.

The amps feature:
* Silver wiring throughout all signal paths

* Silver solder throughout

* A power supply using Solen polypropylene capacitors, bypassed with Audio Note tin foil and silver mica capacitors, with JJ power supply capacitors as the main psu smoothing capacitors

* Mills non inductive wirewound cathode resistors

* Cardas Golden Ratio coupling capacitors


The are for sale with a complement of valves included. These are: EH Gold Grid premium 300bs, Sylvania 5687 driver valves, Sylvania 6AU6 input valves and Electro Harmonix GU4GB valve rectifiers.

Each amplifier is a monobloc valve amplifier which uses 2 x 300Bs as the output valves and has valve rectification with chokes. Power output is 26 watts into 6 ohms and frequency response 12hz-26khz, with hum at 0.5mv and distortion less than 0.1%. Sensitivity is 300mv. The chassis are in black with aluminium faceplates and chrome transformer caps.The amps have a few slight scratches on one of the transformer covers but are otherwise in excellent condition.

The amplifiers are very quiet and do not audibly hum through my loudspeakers. The feedbackless design gives an unbelievable sound quality that has to be heard to be believed. Drums and other transients have a realism that you simply do not get with designs using feedback. There is plenty of power and drive for a really dynamic performance whatever style of music is your preference. Overall, the amp provides extreme transparency with an incredible musicality and sweetness. They bring boogie factor or musicality to any music and excel at pace, rhythm and timing. Vocals and classical music sound sublime and the soundstage is huge, stretching sideways and forwards and backwards more than virtually any other amps.

The amps sound at their best with a vinyl source but also because of the feedbackless design and sheer musicality, breathe life and character into digital sources. The amplifiers have been compared to some very expensive well known commercial valve amplifiers-including Audio Research, Ear, Audion and Audio Note’s finest-and have easily beaten them on sound quality. I have also compared the amps to AVI, Naim, and Nu Force solid state amplification worth many thousands of pounds and all who have heard them far prefer the sound of these valve monoblocs.
I used these amps with Elac FS207.2 speakers which are 84db sensitivity and there was loads of power and drive on tap to fill a reasonably large room. I have also used them very successfully with Epos ES30s and Audio Note Ks, and my Wilmslow Audio Prestige clones. There is only one caution and that is that they will not work well with current hungry loudspeakers, so a little care is needed when considering their partners. These amps are very heavy and weigh some 20 kg each. Collection or handover at a mutually convenient point is the seller's preference."

[lordmortlock]

They are parallel single ended.

Nope, push pull. 26 watts into 6 ohms

[walpurgis]

Hmm. Very tempted.....................but I've promised not to do anything naughty.

They look great, bet they sound sublime.

[lordmortlock]

Cheers Geoff. They so sound pretty special. PP bass control and solidity but with that 300b midrange magic.

[farflungstar]

I'm looking for a second set up and would love them - but no shipping grrrr.
Adey

Sent from my Aquaris E4.5 using Tapatalk

[macvisual]

Thanks Jake for that detailed reply..... Very much appreciated!

I'm using Audioplan Kontrast MkII floorstanding speakers which I believe are 88db efficient, I love my music with a wide soundstage along with it being dynamic with punch, a lot to ask for I know. I play my music loud at times alright...

I do listen to both vinyl/analogue along with digital streaming. My phono-stage is a Kinshaw Perception 2x box MM/MC switchable, and am using a Len Gregory Music Maker 3 moving iron cartridge. I'm hoping to borrow a friend's Promitheus Audio TVC passive Pre-amp within the next few weeks on long term loan etc...

Regards;
Peter
Central Scotland

[lordmortlock]

I'm looking for a second set up and would love them - but no shipping grrrr.
Adey

Sent from my Aquaris E4.5 using Tapatalk

Sorry Adey, I just know how I'd get them to you safely