Hi Allen, yes both mundorf Amt and Neo10 planar mids are 92. In order to get the lower frequency response I have ended up with an 87db bass driver.
Do planar drivers suffer as much from lobing do you think? Drivers are positioned as close as they physically be. Mids and bass are sealed tweeter is dipole. After mock up baffles this sounded best.
How does lobing change with 16ohm mid load?, networking / streaming and cable designing is my usual DIY so speaker design has been a new leap. This is a kind of clone from a design shown in attached. A little known Italian company called Giussani Research
Giussani-Research | Delta 4 R9
When getting to crossover design (I’ve read the fundamentals from your epic thread!) i need to grasp which type of filter to apply and have to say I don’t have much idea yet. The test crossover is a 2nd order. But due to sensitivity miss match (impedance too?) the mid / treble is more prominent.
Do planar drivers suffer as much from lobing do you think? Drivers are positioned as close as they physically be. Mids and bass are sealed tweeter is dipole. After mock up baffles this sounded best.
How does lobing change with 16ohm mid load?, networking / streaming and cable designing is my usual DIY so speaker design has been a new leap. This is a kind of clone from a design shown in attached. A little known Italian company called Giussani Research
Giussani-Research | Delta 4 R9
When getting to crossover design (I’ve read the fundamentals from your epic thread!) i need to grasp which type of filter to apply and have to say I don’t have much idea yet. The test crossover is a 2nd order. But due to sensitivity miss match (impedance too?) the mid / treble is more prominent.
Attachments
You get lobing between the tweeter and mid, just in the region where they cross and are working together. I understand that you have tried to get them close together, but until you measure (or simulate, or draw) the situation you can usually expect variations with angle.
In theory you may get a main lobe near the middle and one up and down, with nulls at an upper and lower angle. If you put a second mid on top you achieve nothing because this pattern is the same when upside down, so you still have the nulls.
This is why if you tilt the lobes by introducing a phase shift, they will mirror and fill the gaps, each mid working in its own space to some degree, and why I thought you might want more sensitivity there than the other way.
In theory you may get a main lobe near the middle and one up and down, with nulls at an upper and lower angle. If you put a second mid on top you achieve nothing because this pattern is the same when upside down, so you still have the nulls.
This is why if you tilt the lobes by introducing a phase shift, they will mirror and fill the gaps, each mid working in its own space to some degree, and why I thought you might want more sensitivity there than the other way.
Tree hanks Alan, appreciate it’s going to be a long haul project with the crossover as I need to learn much much more.
I ended up with design after having a pair of BG radia R-500 kind of line source but sold them with a house, always loved them with the MTM filling the room more vertically than other speakers I’ve kindred to at least. had a whole range of other speakers since mainly focused on bbc style, now dabbling again in planars.
I have a friend with a measuring microphone for audio set up and will take measurements, once it’s all assembled. In the meantime trying to work out best wiring up layout while the workshop finished the cabs.
I don’t expect the crossovers to be easy by any thought. Might try and find a pro to help but who knows who is good or not, sometimes forum members knowledge is leagues ahead.
Any pointers on software for taking measurements and plotting into for design would be welcome,
I ended up with design after having a pair of BG radia R-500 kind of line source but sold them with a house, always loved them with the MTM filling the room more vertically than other speakers I’ve kindred to at least. had a whole range of other speakers since mainly focused on bbc style, now dabbling again in planars.
I have a friend with a measuring microphone for audio set up and will take measurements, once it’s all assembled. In the meantime trying to work out best wiring up layout while the workshop finished the cabs.
I don’t expect the crossovers to be easy by any thought. Might try and find a pro to help but who knows who is good or not, sometimes forum members knowledge is leagues ahead.
Any pointers on software for taking measurements and plotting into for design would be welcome,
Appreciate it. I know the tweeter is neo 3 in this but looked up the spec sheet for the BG r500 and crossover is 2nd order 300hz for the lower 1st order 2.2khz for the high after measurements that might give a good guideline for a crossover order at least.
Again appreciate the pointers on the software.
Again appreciate the pointers on the software.
