AMP recomendations

Given that this thread started asking about amplifiers, and the OP has got themselves sorted, I shall keep this brief.

Fudge you need to stop fudging numbers.  Re for the 18Sound is 3.1 not 6.8 which means its motor strength is double that of the RCF.

18sound offers the The 18NTLW5000 in both 8 and 4 ohms. It is a more valid comparison to compare speakers of equal impedance. If anything, it is you that is being disingenuous.

You post on the thread basically to tell the OP he has bought the wrong loudspeaker drive unit. It wouldn’t be so bad if what you wrote iwas helpful, but it wasn’t.

you need to stop posting random formulas without any context.

You stated:

i call BS on them.  there is not a single place on the internet that explains what causes mass break point frequency.  it is a total mystery.

The context was a response to your statement about there being no information out there. If you look for it, there is. I simply posted examples, and given the topic, i.e., upper roll-off frequency, the the equation is actually relevant  and not totally random.  My point was that just because google doesn’t have the immediate answer doesn’t mean it doesn’t exist.

Your comments about the JBL tech paper don’t merit a reply.

Have you considered starting your own blog to crave the need to write so much?

Robbo wrote: Thank you Ian---We can all get back to sanity now!!!!!!!!