So I bought the Willsenton R-800i


After I bought the Klipsch Cornwall IVs recently it became apparent quite quickly that to make it really shine it needs a tube amp to drive it. (For me at least.) After doing some (=endless) research, considering the options (budget, shops nearby carrying models I´m interested in, etc.) and also asking around on this very forum I decided to go for the Willsenton R-800i. None of my friends here shares my excitement for audio stuff or even has a comparable system, so what´s now in my living room is the one tube amp I know. And I´m delighted. Together with the speakers it gives the music the presence and glow that I so desired.

Of course I can tell that there´s more potential in this amp and I already exchanged some of the stock tubes. There are more on the way and I can´t wait to test them. For now my financial means are a bit limited so I´m not ordering Western Electric and Takatsuki 300Bs just for the sake of comparing them. In fact I´m waiting with those a bit and go for the others first.

Searching online I find a lot of information on English language forums. Somehow tube rolling is not discussed as much on the German forums I checked though – and out of curiosity (and because they were pretty cheap) I went for both West- and East-German ECC83s and a fairly random mix of other tubes from the US and the Soviet Union. I´m waiting for them to arrive and not being able to read about some of them it raises my curiosity how they will sound. Maybe crappy, maybe not so bad, maybe even very good. I´ll see. Tube rolling will take some time and I don´t mind. The amp is there to stay for quite a while.

There´s an exhaustive thread on the Willsenton amps and fitting tubes here but since I found people´s comments on this forum so helpful I´m looking forward to hear from you. I´m open for tube recommendations and would like to hear anyone´s experience with the Willsenton R-800i. Or maybe someone has questions?

As for the tubes:

805 – stock replaced for Cossor
300B – stock
6SN7 – stock replaced for Sylvania GTBs, waiting for Fonon NOS (Soviet, 1979, a bargain for 10€)
12AX7 – stock replaced with current Mullard model, waiting for West German ones from AEG and Telefunken, East German ones from RSD and Funkwerk Erfurt (both used) and also Sylvania JAN 5751 NOS (a military model)
5U4G – stock, waiting for RCA NOS black plate and Svetlana NOS „Coke Bottle“

chmaiwald

Showing 19 responses by charles1dad

@richl35 

Congratulations!! You have obviously found a splendid amplifier and speaker pairing.👍

Charles

@richl35

I borrowed a set of ZU Audio, Omen Def Supreme towers. These things absolutely rock! I love how good they sound at low volumes. Fantastic speakers, for me anyway. I think they are very efficient and I hcan tell the Willsenton likes them. Likes them a lot!

The Zu speakers are fairly high sensitivity and more important (I believe) high ohm speaker impedance, so very easy to drive. Also less current demand and less distortion from amplifier. I can understand why they would pair well with the 805 SET amplifier.

@chmaiwald 

The first record I put on now was „The Isaac Hayes Movement“ and even with the stock tubes still in place it was such a dramatic difference to the Rotel I used for the last few days. So smooth

I have no doubt that the contrast between these two amplifiers is significant.

I am glad you were able to get the problem corrected.

Charles 

@jbhiller 

wonder if the 800 has the same design issue as the R8--Skunkie Designs found that it was missing a resistor on the bias pots.  If the pot wiper gets sticky or otherwise malfunctions, it could let full bias hit the tube and blow it.  

A very plausible explanation.

Charles 

 

@chmaiwald 

One thing´s for sure: I do miss the Willsenton´s sound already

That is understood. A good tech should be able to evaluate and solve the problem for you.Charles 

Yes, I know that the 805 and the 845 are completely different power output tubes. I did not know that Willsenton uses  the same amplifier model number for 2 different amplifiers. Utilizing the 300b as the driver tube is very nice. That’s a lot of amplifier for that cost.

Charles 

Is the Willsenton R800i an 805 or an 845 output tube based?

I have seen both descriptions. A very nice looking amplifier. The 805 in SET provides about 50 watts of pure class A power. An 845 SET usually about 25-30 watt range pure class A.

 

For now, I'm still running this guy in and enjoying every minute.  This is a special amp indeed

That is very encouraging and high praise for such an accessible 300b SET.

Charles 

Quite frankly, it sounds great biased at just over 100ma
 

It will be interesting to see what they say. The good news is that the amplifier is sounding great! I’ll take that result every time.😊

Charles

@jbhiller 

At some point, I'll be curious about your views on coupling caps and tube rolling.  I have trouble leaving mediocre caps in place that link to the speaker outputs, BUT I need to patient and get a feel for this guy.  

Getting familiar with the sound and character of the new amplifier and exercising patience, agree. Once you have established a good feel for your amplifier then you can decide what it is you want to sonically modify or tune via capacitors and tubes.

At this initial stage you already like what you are hearing. And based on your description this is a solid and well-built amplifier, with a good foundation for future upgrades. You’ll be able to transition from good sound to very good/excellent sound  with wise capacitor and tube changes. You’re in a good place.😊

Charles 

@jbhiller 

It is good to read that your very early listening experience is quite positive. That’s a very encouraging sign. This amplifier hasn’t even begun to burn-in yet. The sound will only further improve from this juncture. Keep us posted.

Charles

@grannyring 

My knowledge of it is limited to what’s on their website.It uses different driver and rectifier tubes from the Frankensteins mono blocks and share a power transformer. My gut feeling tells me it is very good however. Israel Blume won’t present a new product unless he believes that it is worthy.

Charles 

@jbhiller 

Nice move and congratulations!

I look forward to reading your listening impressions.

Charles

@chmaiwald 

Thanks  for taking the time to provide an update. I’m happy that this amplifier purchase has worked out so well for you. With the 805/300b combo circuit, this will provide beautiful music reproduction for many years of enjoyment.

Charles

Assuming that amp up to it, top tier tubes will be impressive upgrade from present tubes. Crazy, but I could easily spend $2500 up on those three tube sets alone, even more crazy, it would be worth it.

Agree 100%. If it is a good quality SET build, then the upper tier DHT tubes will exploit its full sonic potential.

Charles

 If one can purchase a legitimately backed extended 3 year warranty for 160.00 USD this is good news and reassuring. It seems that from reviews and word of mouth the Willsenton amplifiers are a quality built product. 

I find it very interesting they can offer a 805 (DHT) output tube that requires high voltage circuit/power supply/transformer and driven by another DHT 300b in pure class A at this price point. And do so in a presumably very reliable package. That’s quite impressive. This is an ambitious undertaking.

Beyond the far more common class AB tube amplifier using pentode type tubes in a push-pull circuit.

Charles

 

 

@roxy54 

The First Watt F7 should very likely be a much better match for your horn speakers compared to the Pass Lab 250.5. Intuitively the 250.5 does not seem a good match for a horn speaker. I'm curious as to how you find the F7 compared to a high quality tube amplifier driving your horns. I'm looking forward to your listening impressions.

Charles