I love my WA5-LE. Was considering buying a WA5 just because I’d like to hear it with speakers. Any WA5 V2 owners out there have any input regarding its capabilities as a headphone/speaker amp? Love to hear your take on it
I had both WA5-LE v2 and WA5 v2, both with the internals upgrade.
With the headphones (Utopia, LCD-4, HD800) that I used, it performed very well.
At a CanJam London I heard the RAAL sr1a and fell in love. I have heard full-spectrum ribbon speakers before and I have always loved the magical liquid sound in the upper registers, and the freedom of the bass. I bought the sr1b, the ti1a interface box, and the star8 cable.
On the basis of confused advice I tried to drive them with the WA5-LE. Even with the interface box it was a disaster because of the impedance mismatch.
I was in the foothills of an extremely steep learning curve about valve amplifiers!
I traded in my WA5-LE with Woo for the WA5 in the expectation that I could drive the RAAL from the speaker terminals.
RAAL
@aleksandarR kindly supplied me with the necessary 4 bananas to XLR custom length cable free of charge, one of many brownie points for them!
Throughout this saga, the level of support they gave to get my use case to work is just stellar.
It still didn't work. Simply didn't go loud enough, and distortion associated with the bass was still there.
@aleksandarR even sent me - free of charge - an interface box with transformers wound especially for me to impedance match 4Ω and 8Ω rather than the 16Ω and 32Ω of the standard box. He was just as stubborn as me about getting the Woo to drive the sr1b!
Now it was close to being loud enough, but the ills associated with the bass still remained.
I tried tweaks like rebiassing the output tubes, replacing the output tube cathode bypass capacitors and using solid-state rectifiers in the psu.
All these things made improvements to the sound, but it just wasn't there. The bass was still unsatisfactory, heavier bass making the rest of the sound just fold up.
I decided to rebuild the amp section. So I gutted it...
After the rebuild - I also put the valve heater circuits outboard to prevent any ac whatsoever coming into the amp section - it looked like this:
This totally fixed all my issues except for a tiny tendency for the sound to sag - again with heavy bass.
I sorted that out by getting rectifier double adapters from
@Deyan and I now run a quad of 5Ц3С. This stiffens the B+ supply without the need to rebias the amp tubes to deal with a different voltage on the HT rail.
This is the final system and the sound is everything I ever dreamed of, but never thought I could afford.
I have learned so much.
I still can't emphasise strongly enough the absolute commitment RAAL
@aleksandarR showed to their product to help me to get this to work.
My intentions for the system are now two-fold: first to improve the stand to give better vibration isolation; and second to re-implement the amplifier using seriously gorgeous casework - for which I have some strong ideas.