Rerurn to Romy the Cat's Site

ulf wrote:

If you have no experience of HornResp I suggest that you download a copy and try it out. It is a very neat software that is useful when designing horn speakers. You can easily make simulations and get a decent result concerning frequenzy response and so on.

Romy the Cat wrote:

I can not speak Swedish and have no idea what they say but here is a Swedish 50Hz horn project. I admit that I have difficulties to like people who design horns in Hornresp but… for whatever it worth…

It is not that I hate the software itself bit I hate any thinking where Hornresp accepted as an evidence or as anything else besides being an abstract and an irrelevant tool.

Hornresp calculates acoustical impedance, frequency response, driver’s impedance, diaphragm displacement, phase response and group delay. Hornresp is in a way familiar with front and back chambers, multi-driver chambers and different horn profiles. It is purely magical software, right? Well, not really as it has absolutely no awareness about sound and therefore Hornresp can predict the result with the same accuracy as observing of whether the earth’s minerals content are capable to predict the taste/smell of wine.

Horns are odd and one of the oddities of horn is in their “extrovertness”.  There are a lot of things are going on in compression drivers, in horns and in many instance the resulting sound is rather a subject of accident rather a rule. Whatever HornResp dose have existed in various spreadsheets where looking at the mouth size and the horn profile it is possible to say easily the cut off of a given horn. It is very simple dependence and there is nothing else to “predict” in there. Then looking at the size of the throat it is possible to say the length of the horn and now the LF will be “loaded”. It is absolutely it – there is nothing else that could be said generically as anything else is strictly the subject of the given implementation.

Why do we need to know a horn’s frequency response if the lower cut off is known from the mouth size and the band-bath response is absolutely not predictable?   Will the Hornresp take under consideration the forth with wish witch the cone mounting scares are tighten, the offset of the drive to the horn axes, the toeing out of the horn the diaphragm  maternal of suspension or the miss-alignment of the diaphragm? Of course not, and I did not mention even 10% of the frequency response shaping criteria. Also, to talks about the “frequency response” in context of bass horn is truly bogus thing to do… if we do the bass horns.

The driver impedance? Did you even try to measure the impedance and compare it with “predicted” impedance? If so then you know the answers… Also, what impedance would say to you  without the relevancy to the actual sound?

The diaphragm displacement? Yes, this is a truly necessary parameter! (It was sarcasm).

The phase response and group delay? … and , what will you do with it?

The front and back chambers? Sure, god luck, the cavity reflections in the chambers are very predictable by software.  (It was sarcasm as well). Also, did you even try to measure the volume of your chambers?

The Multi-driver chambers? Who the hell are going use the multi-driver configuration?

Well, my point is that I feel that the Hornresp is absolutely not necessary took and has absolutely no illustrative purpose of any kind behind being a self-entertaining toy. The Hornresp has some evilness in itself as well.  A person who endowed heavily into Hornresp fate is loosing eventually that vital ability to critically listen the auditable results and to micro-react to the evens of own design progress. I personally feel that the proper methodological recognition and objective assessments of the subjective listening expressions is the very fundamental and very essential qualification of a person who built own playback. Unfortunately the Hornresp does not advance it's use toward this direction and therefore I recognize the Hornresp as a superfluous and wicked tool.

Rerurn to Romy the Cat's Site