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Woo Audio Amp Owner Unite - Page 2332

post #34966 of 34974
Quote:
Originally Posted by ru4music View Post
 
Quote:
Originally Posted by Khragon View Post

 

WA5 sounded pretty good to me when I had it driving a pair of Zu Omen, 8W is a lot when the speakers are at 98 dB efficiency.

 



Let's see: 1 watt = 98db, 2 watts =101db, 4 watts = 104 db, and 8 watts = 107 db at each speaker.  That's the equivalent of listening to two power lawnmowers 3 feet from each ear.

 

It isn't just the volume (decibels) available from the speaker. There needs to be enough power on tap to 'control' the speaker and provide good dynamics and bass. That is often much more power than the mathematics suggests. Having at least 20dB on tap beyond your normal listening level is a good idea.

 

Good example - the Auralic Taurus should have enough juice to drive the HE6 - and it will. It will even go loud with it, but the sound is thin, weak and anemic compared to what a more powerful amp will do (like the WA5 or 430HA).

 

I like 300B tube amps for headphones - 8W will drive anything (including the HE6) very well indeed. Probably massive overkill for anything but the HE6.

post #34967 of 34974
Quote:
Originally Posted by TonyNewman View Post
 

 

It isn't just the volume (decibels) available from the speaker. There needs to be enough power on tap to 'control' the speaker and provide good dynamics and bass. That is often much more power than the mathematics suggests. Having at least 20dB on tap beyond your normal listening level is a good idea.

 

Good example - the Auralic Taurus should have enough juice to drive the HE6 - and it will. It will even go loud with it, but the sound is thin, weak and anemic compared to what a more powerful amp will do (like the WA5 or 430HA).

 

I like 300B tube amps for headphones - 8W will drive anything (including the HE6) very well indeed. Probably massive overkill for anything but the HE6.

 

Now I'm really curious as to what the WA-5LE sounds like driving speakers...

post #34968 of 34974
Quote:
Originally Posted by TonyNewman View Post
 

 

It isn't just the volume (decibels) available from the speaker. There needs to be enough power on tap to 'control' the speaker and provide good dynamics and bass. That is often much more power than the mathematics suggests. Having at least 20dB on tap beyond your normal listening level is a good idea.

 

Good example - the Auralic Taurus should have enough juice to drive the HE6 - and it will. It will even go loud with it, but the sound is thin, weak and anemic compared to what a more powerful amp will do (like the WA5 or 430HA).

 

I like 300B tube amps for headphones - 8W will drive anything (including the HE6) very well indeed. Probably massive overkill for anything but the HE6.


Agreed!  It's relative to the efficiency and quality of the speaker design.  Eights watts can be more than enough.  I've listened to glorious presentations from the 45 tube (1-2 watts) utilizing 12" PHY speakers configured in an open baffle design (no horn loading.)

post #34969 of 34974
Quote:
Originally Posted by jhljhl View Post
 

 

Now I'm really curious as to what the WA-5LE sounds like driving speakers...

 

How would that even be possible? The XLR outputs on the front want to see loads of 20+ ohms, not 4 or 8. Wouldn't you need to add an external output transformer? I would guess most of the extra cost in a WA5 is in the cost of a more fancy output transformer with taps for those lower ohm loads...

post #34970 of 34974
Quote:
Originally Posted by Stereolab42 View Post
 

 

How would that even be possible? The XLR outputs on the front want to see loads of 20+ ohms, not 4 or 8. Wouldn't you need to add an external output transformer? I would guess most of the extra cost in a WA5 is in the cost of a more fancy output transformer with taps for those lower ohm loads...

Maybe Woo can chime in, but as far as I can tell the new WA5-LE XLR now output 8W @ 8 Ohm with low impedance setting and 8W @ 110 Ohm with high impedance setting (8W is for high level, 1.5W for low level).  I don't think the amp cares what load you give it, as long as it sounds good to you that's the right settings.  The classic and new WA5 also output 8W @ 8 Ohm out to the speaker taps, I don't see the difference here, it's just the WA5 gives you a switch for you to use turn on/off the speaker mode, where as for WA5-LE you have to plug in the adapter just like a pair of headphones.


Edited by Khragon - Today at 6:12 pm
post #34971 of 34974
Quote:
Originally Posted by Khragon View Post
 

Maybe Woo can chime in, but as far as I can tell the new WA5-LE XLR now output 8W @ 8 Ohm with low impedance setting and 8W @ 110 Ohm with high impedance setting (8W is for high level, 1.5W for low level).  I don't think the amp cares what load you give it, as long as it sounds good to you that's the right settings.  The classic and new WA5 also output 8W @ 8 Ohm out to the speaker taps, I don't see the difference here, it's just the WA5 gives you a switch for you to use turn on/off the speaker mode, where as for WA5-LE you have to plug in the adapter just like a pair of headphones.

 

I think hooking up a load of lower impedance than an output is rated for can cause an amp to overload/overheat because too much current can be drawn, whereas the opposite is always OK since it would just be a case of underloading a circuit. At least this is my experience with car audio solid-state amps, so YMMV, but I imagine tube circuits would be even more picky. But if Woo is actually advertising an 8W front output on the WA5-LE that can handle 8 ohms, that would be a strange decision since that would kind of be undercutting the reason for the WA5. Maybe I'm missing something.

post #34972 of 34974
Quote:
Originally Posted by WooAudio View Post
 


What's the difference between the LEVEL switch and HP Output switch? 

 

First of all, both the XLR and 1/4" output are active the same time. The HP POWER HI / LO switch select the headphone power output model between high and low power. It affects both outputs the same time. When it is on HI Power, the max output on the headphone outputs is about 8w. On the LO Power, the outputs are approx 1.5w. This is NOT a gain control switch. It switches between Plate output (HI) or Cathode output (LO) of the 300B tubes. To explain the technical differences, we will have to open up a whole new topic so we are not discussing here.. For us to understand,  this switch selects different part of the 300B tube to get high or low power output to the headphones.

 

 

The LEVEL switch is to control the input voltage as to limit the power output. You can use it to get more volume control to play with. 

 

 

 

How different does the new WA5 sound compared to the old WA5?

The new WA5 now build standard with the Premium internal parts and the WBT RCA and speaker terminals. With the added new features (HP Power, Level, Impedance), you should be able to find a correct setting to match a particular headphones. All the flexibility and convenience allow your headphones to work seamlessly with the amp and thus improving the overall sound quality.

 

 

Quote:
Originally Posted by WooAudio View Post

You can use both XLR and 1/4" the same time but you won't get the best sound as opposed to use one hearphone a time. The down effect would be minimum when using same headphones.

Hi-Z is 120 ohms and Lo-Z is 8 ohms, same on the classic WA5.

 

I found some of the earlier posts by Woo, look like 8 Ohms and 120 Ohms (instead of 110 like I stated, sorry).

post #34973 of 34974
Quote:
Originally Posted by pippen99 View Post

I was considering at some point the WA5-LE as my end of the line amp.  When I heard that Woo would make the WA5 balanced I was that much closer to pulling the trigger.  The Woo site has been showing the WA-5 as balance but not until today the LE.  Well both units are now balanced and come with huge price increases.  The WA-5 is now $5899 which apparently includes the internal parts upgrade as part of the base unit.  The LE is $3699 with the internal upgrade still a $1200 option.  That is a 900-1000 dollar price increase to get to balanced.  It may be worth it but the WA-22 looks a lot better today!
Never heard the wa5 but the wa22 is a beast.
Edited by 3083joe - Today at 7:09 pm
post #34974 of 34974
Classic.
#duke #hodges
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