The class H (?) crown- a little off subject
Just got the crown XS1200 working and have removed by skew the rail jerk circuit out and tested the straight amp. Note:It has blown up 3 times in warranty. Anyway, I see it pretty well drives 4 ohms but when loaded to 2 ohms it got funny and showed signs of instability. So if the rail is jerked up to double the voltage as it is in the crown it gets funny driving 4 ohms which explains why this hunk-o-junk amp has blown so many times. I left the rail jerking circuits out and now it is a decent 200 watt at 8 ohm amp that is reliable instead of a 600 watt amp that blows up all the time.
You all be the judge- which amp would you want?
Just got the crown XS1200 working and have removed by skew the rail jerk circuit out and tested the straight amp. Note:It has blown up 3 times in warranty. Anyway, I see it pretty well drives 4 ohms but when loaded to 2 ohms it got funny and showed signs of instability. So if the rail is jerked up to double the voltage as it is in the crown it gets funny driving 4 ohms which explains why this hunk-o-junk amp has blown so many times. I left the rail jerking circuits out and now it is a decent 200 watt at 8 ohm amp that is reliable instead of a 600 watt amp that blows up all the time.
You all be the judge- which amp would you want?
I have two of the XS1200's - and I only run them at 4 ohms with mid/hi boxes (300 Hz and up - where the crest factors are high). The QSCs are better for lows, - especially if you're beating the snot out of them.
hi engel dela pena
greetings will post pcb to you today trying to make
apexaudio protection pcb
thanking you
andrew lebon
greetings will post pcb to you today trying to make
apexaudio protection pcb
thanking you
andrew lebon
apexaudio, a schematic of the protection board posted by you would be much appreciated. Thanks.
plz send me the schematic and the copper side pcb layout for this amp
1964Roovers at gmail dot com
1964Roovers at gmail dot com
hello guys
how to know if we where buying counterfeit toshiba 5200/1943
can anybody shows picture of genuine & counterfeit?
for comparison
how to know if we where buying counterfeit toshiba 5200/1943
can anybody shows picture of genuine & counterfeit?
for comparison
H900 Bridge
Point ""A"on mono input channel conect to point "B" of second channel.
For bridge mode:
Point ""A"on mono input channel conect to point "B" of second channel.
Any unity-gain-stable op amp can be used in that topology. The amps I build are similar on the fornt end and I've used a variety of op amps - even the 1458. (I know, YUCK, but it was only a 50W amp).
My favorites are the varieties of the LF353. The LF412 (low offset version) and the OPA2604 (all-around improved version from BB/TI). I just *like* the sound of the distortion spectrum you get with those Bi-FETs.
Phonic PIII-3000 use NJM2068 in balanced input, and crosover. On amplifier input PIII-3000 use NE5534.
