What external ac/dc power supply do you use?
56V:
https://www.arrow.com/en/products/sdi250-56-u-p219/cui-inc
48V:
https://www.arrow.com/en/products/sdi250-48-u-p219/cui-inc
And just to be clear we're talking about 56v DC, not 56v+- DC, right?
Yes. Only +56V.
Thanks, that's an important detail no doubt
For the pinout you can use the one from the CUI datasheets above.
For the pinout you can use the one from the CUI datasheets above.
Super simple. I'll most likely end up bypassing the Molex connectors anyway since I'm looking to do a 10-channel.
I just placed the order for the bare circuit boards. So those of you who are purchasing parts on your own feel free to do so. Typical turn around on these is 4-6 weeks.
Looks like the bare boards will be arriving next week.
Yes.Is its a self oscillating design?
Looks like the bare boards will be arriving next week.
Nice, that's exciting!
I'm about to place an order for SMD stencils. Just to confirm, this is a one-sided board?
Yes single sided.
BOSC has reached 40 orders. The $999 price is available until November 5th. After that, the price will go to $1249.
Order here:
Shop | Orchard Audio
This is the last chance to get these amazing amplifiers at this price.
Manufacturing of the BOSC amps will kick off on November 6th. Deliveries will start taking place 8-12 weeks after that.
Order here:
Shop | Orchard Audio
This is the last chance to get these amazing amplifiers at this price.
Manufacturing of the BOSC amps will kick off on November 6th. Deliveries will start taking place 8-12 weeks after that.
Looks like the bare boards will be arriving next week.
There was a delay due to customs, it looks like they should be at my place on Friday, so I will be shipping them out the following week.
Also please take a close look at the larger inductors and the datasheet for the op-amps:
- Depending on how you plan on cleaning the board, the inductors cannot be washed as they are not sealed parts.
- The op-amps if washed need to be backed for 30 minutes at 85C to get rid of the moisture.
The BOSC amps made The Audio Beatnik's best of 2019 list:
https://bit.ly/2tt38Nd
https://bit.ly/2tt38Nd
I have a few questions:
1. Are you planning to continue selling modules for DIY?
2. Also, it seems that the amp needs only a +56V, so a simple but regulated SMPS with one output should be enough, right?
3a. Why are the the 4Ohm and 8Ohm models different? Gain, even input impedance and voltage are different.
3b. What would be the downside of using the 8Ohm (optimised?) model wth 4Ohm speakers, and viceversa?
4. The input impedance seems a bit low, so a buffer may be advisable in some circumstances, esp. without active preamp (as in my case). Would a buffer like Neurochrome's Universal Buffer a good complement?
Roberto
1. Are you planning to continue selling modules for DIY?
2. Also, it seems that the amp needs only a +56V, so a simple but regulated SMPS with one output should be enough, right?
3a. Why are the the 4Ohm and 8Ohm models different? Gain, even input impedance and voltage are different.
3b. What would be the downside of using the 8Ohm (optimised?) model wth 4Ohm speakers, and viceversa?
4. The input impedance seems a bit low, so a buffer may be advisable in some circumstances, esp. without active preamp (as in my case). Would a buffer like Neurochrome's Universal Buffer a good complement?
Roberto
The power supply can be between 48 and 60V. The max output power of the amplifier will depend on the power supply voltage and load. You have to ensure that output power does not exceed 200W.
Interesting, the output power of the SMPS? What happens if the SMPS *can* deliver more?
- Home
- Vendor's Bazaar
- BOSC - HiFi Monoblock Class-D GaN Amp