Yes volume pots are mounted on the back next to the inputs and it's better than mounted on front (short wires)
In short-Yes! 🙂
Actually those pots are there just to limit input signal depending on preamp used before the amp. Amp is to be adjusted acording to preamp,connected to a speakers and stored in some rack,and only to use on-off switch. If you look closely,you would see that the pots haven´t got an axle to adjust volume,but slot for a screwdriver. Short wires are bdw benefit too.
I can only suggest diy friendly class D amps, like in thread http://www.diyaudio.com/forums/class-d/182900-class-d-amp-lm566-lm393-2xirf530-7.html
Regards
I have just assembled this amp and whant to double check if i understand right, how bias adjustment is done.
As i understad... i need to measure voltage acros of any 0.47R resistor and adjust pot till voltage reachess 30mV? That is it or im missing something?
As i understad... i need to measure voltage acros of any 0.47R resistor and adjust pot till voltage reachess 30mV? That is it or im missing something?
Hmm voltage was riseing till reached ~35mV and started droping.. after it reached ~17mV...bam... fuse is gone and with that one pair also 🙂
Im sure i have missed something...
Im sure i have missed something...
Look at the next table in the article below (an article of two pages - see last table):
Surse de alimentare liniare pentru amplificatoare audio - calcul, teorie, concluzii - Surse de alimentare - Tehnium Azi - Articole (Articles) - Comunitatea Tehnium Azi
It really depends on the regulation of the supply, how many VA the transformer is, the µF of the caps, and whether or not you use a high voltage tier for the front-end.
It could be as little as 100W/8Ω or as much as 200W/8Ω.
The Hafler DH200 was rated at 100W/8Ω and ran on ±63V, the XL280 (with another pair of outputs) ran on the same voltage but added a high-voltage tier for the front-end and clipped at 180W/8Ω.
It could be as little as 100W/8Ω or as much as 200W/8Ω.
The Hafler DH200 was rated at 100W/8Ω and ran on ±63V, the XL280 (with another pair of outputs) ran on the same voltage but added a high-voltage tier for the front-end and clipped at 180W/8Ω.
An externally hosted image should be here but it was not working when we last tested it.
Apex as i promised i have uploaded photo of amp 🙂
Later im going to make more photos, but first i need to fix that ifps's blowing problem.
Power suply is being used from montarbo active monitor +/-75v 2.1A(per rail) +2x10.00o0uf.