Hi Mikewxyz, we ordered 2 PCB's and payed around €170 each, I already did this before in my Tube based Phono Amplifier that you can find here: SRPP Phono
But I do not think this is going to be a commercial speaker. Joost and I build 2 sets. And in the process that started a exactly a year ago we made some decisions as you can read in this thread. The PCB that you see here was driven by the low cross-over frequency of around 150Hz and the very large and expensive Mundorf Film caps that we would need for the low impedance Mid-Range speakers (approximately 150µ and 300µ) to make a 4th order Linkwitz-Riley slope. doing this active would give us more tweaking options.
A production version of this project would retail in the order of 70k to 100k at least, where the shop would have a 100-120% markup in normal high end shops.
I have not calculated the real cost (spending it over the cause of a year makes it less painful) but I guess we are reaching €10k for the speakers with the walnut outer shell, the aluminium front and back, the custom feet, and of course the units. The BOM of the active filter reaches €2k.
And I did sell my original speakers quite well so I had a good starting budget. The new owner is also very happy with them as he would have spend 6 times more for a similar quality.
The active filter:
A fully balanced transformer coupled (and balanced electronics) with Spakos discrete op-amps, a discrete very low noise voltage regulator and with an adjustable slope of 6, 12, 18 and 24dB/octave and frequency setting between 150 and 500Hz this unit is quite universal and could be used with any of the hybrid designs out there including all DIY projects from Troels Gravesen that uses a Hypex for LF.
Maybe these active filters will come available in a year from now. If they sound as good as I hope they will, they will be replaced by a second generation that I am designing now. (it rains in the Caribbean, so I need to spend my holiday differently)
By adding a source input selection, 2 op-amps per channel and a full attenuation range volume control this can be come a full functioning pre-amp with build in cross-over and we can sell our pre-amp. The idea is that this will sound better than separates. Of course I will go the extra mile. Increase the power-supply and put that including control surface in a separate enclosure 🙂.
But that will become a seperate thread when it happens.
Cheers......
But I do not think this is going to be a commercial speaker. Joost and I build 2 sets. And in the process that started a exactly a year ago we made some decisions as you can read in this thread. The PCB that you see here was driven by the low cross-over frequency of around 150Hz and the very large and expensive Mundorf Film caps that we would need for the low impedance Mid-Range speakers (approximately 150µ and 300µ) to make a 4th order Linkwitz-Riley slope. doing this active would give us more tweaking options.
A production version of this project would retail in the order of 70k to 100k at least, where the shop would have a 100-120% markup in normal high end shops.
I have not calculated the real cost (spending it over the cause of a year makes it less painful) but I guess we are reaching €10k for the speakers with the walnut outer shell, the aluminium front and back, the custom feet, and of course the units. The BOM of the active filter reaches €2k.
And I did sell my original speakers quite well so I had a good starting budget. The new owner is also very happy with them as he would have spend 6 times more for a similar quality.
The active filter:
A fully balanced transformer coupled (and balanced electronics) with Spakos discrete op-amps, a discrete very low noise voltage regulator and with an adjustable slope of 6, 12, 18 and 24dB/octave and frequency setting between 150 and 500Hz this unit is quite universal and could be used with any of the hybrid designs out there including all DIY projects from Troels Gravesen that uses a Hypex for LF.
Maybe these active filters will come available in a year from now. If they sound as good as I hope they will, they will be replaced by a second generation that I am designing now. (it rains in the Caribbean, so I need to spend my holiday differently)
By adding a source input selection, 2 op-amps per channel and a full attenuation range volume control this can be come a full functioning pre-amp with build in cross-over and we can sell our pre-amp. The idea is that this will sound better than separates. Of course I will go the extra mile. Increase the power-supply and put that including control surface in a separate enclosure 🙂.
But that will become a seperate thread when it happens.
Cheers......
