Well, yes, the Fane 12-250TC likes a big box.
But I did not use much DSP power to get very loud down to 40hz, used dip eq only on my think it was 110 liter boxes.
Managed about 106db worth of bass in halfspace with not much power.
Speaker grill is advised.
But I did not use much DSP power to get very loud down to 40hz, used dip eq only on my think it was 110 liter boxes.
Managed about 106db worth of bass in halfspace with not much power.
Speaker grill is advised.
The 300L ported goes to about an F3 of 30Hz without DSP on max 20w (106dB), and with only a slight bump of about 1.5dB at 75Hz says the simulations i made. That is quiet decent for a driver with such a high QTS. And the port is basicly a hole of 6x17cm in the 18mm plywood of the front. The only difficulty about this is the big size and the ammount of bracing that such a cabinet need to be strong enough. I probally need about 3 big sheets of plywood and some full wood beams to do the bracing to build a pair and it will be a real wardrobe style cabinet that won't move easely.
There is no such thing as "flat" FR driver.
But, if you can spend some more, Tang Band W8-1808 would be my choice.
But, if you can spend some more, Tang Band W8-1808 would be my choice.
Hi,
No, the "flat" FR driver doesn´t exist apart from a few units with lots of damping in the cone. These will still need BSC and even then sound bad.
No, don´t trust most manufacturers curves or data. Most FR drivers are worse than published.
So, most FR drivers have unbalanced responses, and your box or baffle will most probably make it worse. A passive correction filter can get this into balance and, if well implemented and made from quality parts, will have no negative effects (don´t believe those who fear destructive phase effects from the filter - phase and response are coupled by fourier transformation, if you get the response better, phase follows...). What such decice CANNOT correct are breakup modes, or simply resonances, which will remain even if reduced in level, as easy to see in a CSD.
If you look for drivers of modest quality without too much treble trouble, W-1808 as an 8" (as Davor said) or W-2143 as a quite cheap 5" are solid choices, the FR drivers from SEAS are not too bad, too. The 2143 could also be part of a WAW system, or have a look at XRK´s WAW with the Scanspeak 4" FR. Don´t believe shelling out lots more of money will buy you drivers without need for correction...
All the best
Mattes
No, the "flat" FR driver doesn´t exist apart from a few units with lots of damping in the cone. These will still need BSC and even then sound bad.
No, don´t trust most manufacturers curves or data. Most FR drivers are worse than published.
So, most FR drivers have unbalanced responses, and your box or baffle will most probably make it worse. A passive correction filter can get this into balance and, if well implemented and made from quality parts, will have no negative effects (don´t believe those who fear destructive phase effects from the filter - phase and response are coupled by fourier transformation, if you get the response better, phase follows...). What such decice CANNOT correct are breakup modes, or simply resonances, which will remain even if reduced in level, as easy to see in a CSD.
If you look for drivers of modest quality without too much treble trouble, W-1808 as an 8" (as Davor said) or W-2143 as a quite cheap 5" are solid choices, the FR drivers from SEAS are not too bad, too. The 2143 could also be part of a WAW system, or have a look at XRK´s WAW with the Scanspeak 4" FR. Don´t believe shelling out lots more of money will buy you drivers without need for correction...
All the best
Mattes
The best of the Fostex factory horns is mediocre at best, FExx6 series have all got better horn designs available. These drivers do need horns.
Dallas II, Kirishima, Vulcan for FE206. I prefer FE166. And the FFxx5wk more. Have a look at FF165wk if headed in that direction. All of these Fostex have some fairly easy tweaks that really helps with the speakers issues.
dave
Except that they are often poor designs.
An example: FE126En Factory Reflex, a "cruel joke" - diyAudio
dave
Pp
I typically avoid volumes larger than 240 liters or so because of this.
For me, I consider it somewhat a waste to make a volume over 180 liters per driver. If there are several drivers it's 240 liters per volume. Especially on a FR unit since it starts getting tricky to avoid internal reflections.
My closed volume for the 15-300TC is about 80 liters, internally the chamber is divided by solid walls at angles to help break and dissipate reflections. Nothing complicated, just some boards and various types of dampening material.
I typically avoid volumes larger than 240 liters or so because of this.
For me, I consider it somewhat a waste to make a volume over 180 liters per driver. If there are several drivers it's 240 liters per volume. Especially on a FR unit since it starts getting tricky to avoid internal reflections.
My closed volume for the 15-300TC is about 80 liters, internally the chamber is divided by solid walls at angles to help break and dissipate reflections. Nothing complicated, just some boards and various types of dampening material.
Attachments
I have FA22RCZ in my current speakers and Iam very pleased with them. Great value for money. But I wouldnt say its more flat than those Tang Bands.
Mine are tricked up a bit. Phase plugs really help with every whizzer cone driver i have tried so far (dozens).
dave
dave
Even the Seas Exotic (more than 500uss each) in a pdf of the company gives the data of a passive network to improve the response.
It remains at 90 91dB. In Klang Ton magazine they establish the same and a passive network with similar values.
There are the pdf from Seas and Klang ton.
Alpair 12p is maybe of the flattest ?
Go a picture from the Seas Exotic.
It remains at 90 91dB. In Klang Ton magazine they establish the same and a passive network with similar values.
There are the pdf from Seas and Klang ton.
Alpair 12p is maybe of the flattest ?
Go a picture from the Seas Exotic.
