It looks like a prototype unit to me and been built by someone dyslexic. Not only is the OR round the wrong way but the hand written PRES has the S back to front. Having been a design engineer building prototype medical electrical equipment for most of my life you use what you have like a chassis of...

I nearly strained my bad back lifting the Matamp on top of the freezer so I could take a photo. Here is the box http://photobucket.com/user/Ruptor/media/OR100_zpsy0glijj4.jpg.html" onclick="window.open(this.href);return false; Looking at the photo I realised someone stuck a Union Jack on the front a...

ironlung40 wrote:I am ignoring this thread.

Oh no you are not. Well this is the pantomime season.

Also doubling the output impedance doesn't reduce the output power by 4 times. It will roughly halve it. Similarly halving the output impedance won't increase the power by 4 times. It will roughly double it. Yes you are right I forgot the impedance is half or double that opposes the increased curre...

Just to rub salt in the wound of the bargain the Matamp has its original Mullard british made valves but is there any real difference between the valves? A long time ago I bought 4xEL34 valves made in GDR for £6 to build an AC30 circuit but I never got round to it because the transformers were very ...

I am about to make you all sick because I was given an original OR100 Orange Matamp but it wasn't working. I fixed a guys Vox AC30 that was dead and he gave me the OR100. Your going to get even more sick now because his mate didn't want a 4 speaker Orange unit that they used with the amp in their ba...

IF it is this combo https://www.amazon.com/Orange-Micro-Hybrid-PPC108-Cabinet/dp/B0161KSGSU" onclick="window.open(this.href);return false; then the amplifier is designed for one speaker not two. The amplifier has a minimum 8R output impedance and the speaker has 8R input impedance so they are matche...

Can someone point me to a schematic of the OR100 like this one? Since Bendyha on this thread said he would like to draw one I guess it didn't exist two years ago but does it exist now?