I guess it's actually easier/better to do attenuation in single-ended?
Much easier. Good quad gang pots get expensive.
I guess it's actually easier/better to do attenuation in single-ended?
More info about THX AAA circuit is in the patent:
- https://patents.google.com/patent/US9071201B2
Source: https://www.thx.com/patents/aaa/
Much easier. Good quad gang pots get expensive.
Hi @amirm. The THX AAA implementation of feed forward plus feedback is unique and heavily patented (all patents unexpired).
Its incorrect to assume it isn't covered by current patents.
Re DC coupling: to achieve, one could short each of the 4 small electrolytics with small wire jumpers. This would void the warranty. But so long as the DAC source is well behaved, this isn't dangerous for the electronics.
Just a thought but would electronic volume control be easier to implement on balanced circuit versus analogue potentiometers ?
@AndrewMason Just curious, why are C12 and C13 empty?
If only it were so easyPlease tell me I can mount large caps there, and make it into a 150W 8ohm speaker amp!
Yes they were actually ahead of schedule by a couple weeks.What delays? They were all shipped to customer before the originally stated shipping date. That is the opposite of a delay
Looks like an Alps RK097-series to me.What about the volume pot "secret sauce"?
Indeed it is.I guess it's actually easier/better to do attenuation in single-ended?
Good point, Tom. Also, while the benefits of internally processing the signal fully balanced are tenuous, I believe that there are benefits to differential transmission of signals between gear in noisy environments and/or if the signal has long distances to travel.Indeed it is.
Also note that there isn't really any technical advantage of using fully differential/balanced circuits at these distortion levels. The idea that "balanced is better" stems from the tube days where balanced circuits were sometimes employed to reduce distortion. In theory this works well. In practice it's usually better to avoid generating the distortion in the first place. Often cancellation circuits actually make the performance worse. Also note that a balanced circuit cancels the even order harmonics - those that most find pleasing. The odd order harmonics aren't canceled.
From a business perspective, balanced circuits become a non-starter pretty quickly in low THD designs. Somehow the idea of using twice the number of parts to degrade performance only to get a bullet point on the marketing copy doesn't seem to go over well.
Tom
I agree wholeheartedly on the differential signalling between pieces of equipment. Within the boxes, signal integrity can be maintained by good circuit design and layout.Good point, Tom. Also, while the benefits of internally processing the signal fully balanced are tenuous, I believe that there are benefits to differential transmission of signals between gear in noisy environments and/or if the signal has long distances to travel.
Looks like an Alps RK097-series to me.
No answer, I interpret that as a silent no.@AndrewMason, is there a way to make the amp automatically turn on when main power is turned on?
Are there any informations about the upcoming measurements of the Loxjie P20? I own one myself and I think it is a really cool amp.
best regards