01-31-2024, 03:09 PM
Quote:Does this response look like a "typical" starting point to you at this stage?
Other than the midbass driver the response looks relatively typical and is workable. Linn publishes the driver specs as 125mm for the both the midbass and midrange. What the response tells us is that it is just two of the same midrange drivers. This speaker will not be able to produce any appreciable low bass which may be fine if you are going to use a subwoofer. Is that the case?
80hz low pass is going to be much too low for this driver.
Quote:At 40Hz we are down at least 15dB. Can Linn's claim of 40Hz for their Aktiv Kaber speakers be met?
No they cannot.
The 5" midrange is going to begin beaming around 3k but should be quite linear up to that point. You are going to need to bring the midrange down quite a bit in level to get everything matched properly but that shouldn't be an issue.
Quote:
- The trebble is several dB lower than the mid.
- The trebble falls off from 4K, not 2.8K
This is okay and will be fixed in the EQ and tuning. Do you have an idea of what you want the overall frequency response target to be?
The reason 2nd order crossover filters can be problematic is due to the phase issues that they introduce. This is dealt with sometimes by inverting the polarity of the midrange or midbass driver. This is why a 4th order filter is preferred as it sums perfectly at the crossover point both in phase and amplitude.
I will follow up when I've got some time this evening.
