Thanks Nelson, I can't wait! You can't have too many excellent crossovers after all...
The funny thing is last week when I ordered a Mean Well 24V power supply from Mouser for my H2, I thought to myself, "I should probably order a couple more of these."
I should've listened to myself. 😀
The funny thing is last week when I ordered a Mean Well 24V power supply from Mouser for my H2, I thought to myself, "I should probably order a couple more of these."
I should've listened to myself. 😀
Is that +24V unregulated? A pity there is not a symmetric power supply (+/-) so that we could get rid of the coupling capactiors.
that's bloody optimistic, counting on fact how many series connected capacitors one need to have in active xover stages
I mean the interstage coupling capacitors that are electrolytic. These cannot easily be replaced by film caps. The capcitors setting the slope/frequency of the crossovers must be film caps anyway.
wait for Pa's schematic , then introduce bipolar supply, taking all Vref points to GND
remove interstage coupling caps
easypeasy
🙂
remove interstage coupling caps
easypeasy
🙂
Isn’t that essentially what we already have in the diyAudio Store.
Analog Crossover Network – diyAudio Store
Aimed at the LX-mini but very versatile.
dave
Doesn't look as versatile to play with various drivers as the B5 would be. I could be wrong but it looks like component values need to be changed to alter the crossover. With the the B5 you flick switches.
I'd be keen to see a DIY B5.
I believe that this simplification is also in the one we are talking about here as well. If you want to flic switches i think you will need to get a real Firstwatt one.
dave
dave
I tried to reverse engineer the B4. My guess is attached. The Rs have values ", 2R, 4R, 8R, ...
For the LP part of the B4 crossover, opening all DIP-switches will open R9 - R12 (see attachment). This means no signal will reach the inputs of U5 and U6. (Likewise, opening R1 - R4 will the audio straight to the positive inputs of U1 and U2. I guess maybe the gates are grounded via 1Meg?)
/RK
For the LP part of the B4 crossover, opening all DIP-switches will open R9 - R12 (see attachment). This means no signal will reach the inputs of U5 and U6. (Likewise, opening R1 - R4 will the audio straight to the positive inputs of U1 and U2. I guess maybe the gates are grounded via 1Meg?)
/RK
Attachments
The Gates are provided with 2 Meg to ground to insure that there is no
excitement when switching or if the resistors are left open.
excitement when switching or if the resistors are left open.