Do we have a rough idea of price at this stage?
post #61 of 497
8/5/08 at 6:55am
Separating supply/caps for OPAMPs and buffer is to suggest
But to divide btw L and R, is requiring more implementation area.
So, it will supplied from a pair of cap for (2 or 3) OPAMPs.
For buffers will be so too.
Voltage changing isn't considered, because I don't think merit for using C-MOS OPAMPs (like AD8656 or OPA2704 with huge pop) on this amp.
I'm the originator of this project from Japan.
Chargeability is most fundamental requirement for our environment.
It aims at or exceeds SM4, SR-71's quality.
Priority we think is Quality >> Price > Portability.
We want higher voltage, higher performance, chargeable, and modifiable.
Join our project, please!!
We'll welcome you
As long as budget allows, all requirements from you can be realized via me.
Circuits, caps, buffers, enclosure, appearance.....
Now it's the phase to compile requirements.
Many your advices, demands from our community, and my opinion will be integrated on this amp (as images I uploaded).
We are just wanting this as the ideal PHPA.
* CAUTION *
ryuzoh is now known as untrustworthy person in Japanese community.
If you can read Japanese, see this:
"How is the price, or spec? I need to know it to pay for it."
"Shut up and just pay."
"#165 is the troll."
"tohma cencelled his pre-order. Listen up everybody, he is wrong. I am right."
He misinterprets it with malice to interrupt this project.
I just said, "If you want buy it cheaper, all you can do is to buy.".
Refer below from bt-fi.
As the only 'problem' of it is it's not portable besides availability, how it will compare? at least your thoughts on that.
should i get myself dr.dac2 or jump on this?
consider that i have a D2 now and that opamps are hard to get in Romania because it's usually blacklisted on homeusers (less than 50-100, guaranteed payment..) because it was a phenomen that people ordered free opamps and other stuff only to get something as a showoff and "simple people thoughts on security".
i could get a little crazy and stuff something like Laptop Li-Ion Universal External Battery, 3.3-14.4V ( 60Wh) for all Portable Devices - NB-H4HCT18650902 in a little bag with a dr dac2 for portability but it would be inconvenient sometimes but I don't see how I could obtain the best portable considering my environment.
As an alternative idea for power, how about a 18650 lithium ion battery (3.7V @ ~2600mAh) that can be either charged in the unit, or swapped out for a cell that was charged in an external charger.
These give you the benefits of lithium ion in terms of power density and good recharging characteristics in a nice 'cell' style form factor and reasonable cost for the user.
The key thing would be to make sure the battery door is sturdy enough and easy to operate.
Optimally the unit would employ a USB connection for in-unit charging. This would give a lot of flexibility. Personally I have been trying to standardize my charging capabilities, with USB power sources for the car, wall outlet and even battery backup. This provides a standard power system that can power both my iPod and my phone.
If needed, a DC to DC converter could be employed.
Personally (while I have a iBasso P2), I'd like to see a future version based on something like the D1 to add SPDIF and USB input.
Here is a (cheezy) photo picturing an 18650, AA and 123A cells, with iBasso P2 and charger.