Normal
Re: 60 Degree DIY Mid HiYou are absolutely correct Ivan. I estimated that the I had 10mm from the spacer + about 1mm from the cone offset relative to the frame, plus an additional 2 mm as a result of the suspension flattening as it near its extreme limit.i.e. it could withstand about 13mm of cone travel before it hit the front plate with a 10mm spacer. That corresponds to 2600 watts input per driver at 100Hz – the nominal crossover point.I also looked at the sensitivity to changing the volume between the speaker cone and the horn mouth, and the effect it had on the frequency response. Here is a plot of the cone excursion at 1300 watts per driver, the nominal program rating of the RCF MB12N351. I think 10mm is about right but I figured if I have problems I could add a small spacer. I also assumed at these types of drive levels (2600W) that some dynamic limiting will occur and it would be difficult for a driver with a VC length of 16.5mm and a top plate thickness 11mm to achieve the calculated Xmax.
Re: 60 Degree DIY Mid Hi
You are absolutely correct Ivan. I estimated that the I had 10mm from the spacer + about 1mm from the cone offset relative to the frame, plus an additional 2 mm as a result of the suspension flattening as it near its extreme limit.
i.e. it could withstand about 13mm of cone travel before it hit the front plate with a 10mm spacer. That corresponds to 2600 watts input per driver at 100Hz – the nominal crossover point.
I also looked at the sensitivity to changing the volume between the speaker cone and the horn mouth, and the effect it had on the frequency response.
Here is a plot of the cone excursion at 1300 watts per driver, the nominal program rating of the RCF MB12N351. I think 10mm is about right but I figured if I have problems I could add a small spacer. I also assumed at these types of drive levels (2600W) that some dynamic limiting will occur and it would be difficult for a driver with a VC length of 16.5mm and a top plate thickness 11mm to achieve the calculated Xmax.
