Othello

Frequency response is one of the first things I would want to measure, but your answer created more questions, what's an RTA?? Uwe

Ohhh!, sometimes singledom and acres of space taste sooo sweet!! And its all my money too....

What do some of the better equipped members here use to measure the performance of their speaker designs. I have an oscillator (albeit not a sweeping one) to produce the signal but what is a good low cost way to record it (without a pc based gizmo, I am a Mac person and prefer stand alone devices anyway). Sure there needs to be a good mic, but then do you rectify the signal and measure it or use an AC voltmeter calibrated in dB and plot the whole thing??? Uwe

Since I am starting out in this hobby I have to sheepishly admit that I don't understand any of the techno talk of the last post-I would need a translation.... TIA Uwe

I am trying to find out which woofers are suitable for a Khorn. I am confused by all the different designations, EVM15 L, EVM15 B etc. Uwe

I can only answer this question with regard to the one professional item I own. I have always had a Revox A77 tape machine and when it developed problems I was faced with fixing it or getting another one, but do I get the same or do I upgrade? To make a long story short I bought, from the radio station in Berlin-Germany, one of their studio recorders, a Telefunken M15A. The machine weighs 140 lb. and comes with 3 volumes of maintenance info. It expects to be connected to a studio console, no VU meters here, and it uses connectors the likes of which I had never seen before. Also people tell me that its looks give most women a reason for divorce, even though I do not find that true, but then I didnt have to ask anyone But it is built like a tank and of a quality which makes me drool every time I use it. And it has changed everything regarding my home stereo, now I read articles about balanced versus unbalanced lines, I look for a studio console and got already several gorgeous components from another radio station. And I bought test equipment to be able to maintain and adjust the machine and to set line levels etc. So I never regretted one moment having gotten this machine, but a talk to a friend, a Revox owner, indicated already that he would not be willing to rip his entire stereo system apart to accommodate such a machine. I on the other hand love this challenge and will continue to learn about professional systems and gladly hunt for the tape (pancakes, no reels on this one) to feed this machine. And I never had such a wonderful performing system before. Hope this helps Uwe Maine

Ok, as I mentioned already, I have the Speakerlab plans and they seem sufficient to me. In order to get on with the project I would love to know what speakers people have used in their horns. Once I know what to look for I will do the ebay search etc. Uwe

I would have the same question, where can I look at plans for the Jubilee. I mean here I ask for experienced advice to build Khorns and a number of people say no no, build the Jubilee. Ok, but do they also provide the info or point to a file with plans? The beauty about the Khorn is that there are plans available. The ebay number of the first poster (Wrench722) didn't work by the way... Uwe

I would like to build my own Khorns and I am looking for people with experience to keep me from making all the mistakes they made already.... I have the Speakerlab plans and enough plywood to do it. I would need advice regarding the speakers to locate for the DIY Khorn. AND: I do live in a post and beam place which does not have the clean corners a Khorn might want (there are 8" beams in my corners). Does that work?? I mean what is 8" considering the wavelength of the bass signal, but then maybe it does matter, does anybody know?? TIA Uwe

I just bought a meter like that, a bit newer, but the same HP series. I also bought a 50 year old HP audio oscillator to go with it. Very useful stuff. You use it to check the amplification factor of amplifiers for example. Feed a signal of some known level, lets say -40 dB, into the amp and see how much it amplifies the signal. Vary the frequency and plot the frequency response curve of your amp. I use it to change my stereo over to studio signal levels (which is 0dB), to calibrate the VU meter of my reel to reel tape machine to +6dB etc. Uwe