hmscott
1000+ Head-Fier
FYI - I received the Ravpower RP-PB187 and it easily runs my Topping D90 MQA + Xduoo TA-20 plugged in to the 2 110VAC power outlets on the Ravpower RP-PB187.Heads up, promo code drops price from $249 to $159 good till March 11:
Portable Power Station 252.7Wh Power House
Model: RP-PB187
https://www.ravpower.com/products/rp-pb187-portable-power-station
Crazy, I just got another promo code from RavPower bringing the price down to $159!
Note: The code I used directly on RavPower.com a few days ago was for $169, POWERSO - and that appears to still work too as I got another email with that Promo code today. So try the code pictured below first direct on RAVPower, and on Amazon + $10 coupon, to see which price is lowest.
There are also two new Bluetti EP500 / EP500 Pro LiFePO4 5100Wh models coming on Kickstarter on March 16th. "Sign Up To Get Your Super Early Bird Perk At $2799!" (Incl.Taxes) at the bottom of the header image and botton of this page:
https://www.bluetti.com/pages/ep500-p
Original post here:
https://www.head-fi.org/threads/sch...most-improbable-start-up.701900/post-16229107
Update: Bluetti is having a nice $300 discount on their LiFePO4 based AC200p: $300 OFF, CODE: AC200P300, and more!
https://www.bluetti.com/products/bluetti-ac200p-2000wh-2000w-portable-power-station
https://www.bluetti.com/pages/power-for-the-spring
I bought a couple of 2 prong adapters from Home Depot to allow 3 prong plugs to work with the RP-PB187 2 prong sockets. I'm mentioning this because most of the listing for such an adapter at HomeDepot was $7+ - or you had to buy 10 or 20 qty minimum, but this listing was $0.88 and was available for curbside pickup
https://www.homedepot.com/p/Commerc...-Outlet-Grounding-Adapter-Gray-U-09/203456716
The Ravpower RP-PB187 ran the D90 MQA / TA-20 for 2 hours+ on 20% of the charge, then I plugged in the charger. It also charges while powering devices, called "passthrough", as I'd like to run my audio devices from battery power 24/7 - and the provided charger easily keeps up with the D90 MQA / TA-20 power usage.
The goal of this project was to provide a quieter power source - and it is working that way, even while charging. The charging and power delivery must be isolated internally as I cannot detect any line noise or static in my Hifiman Ananda headphones when plugging-in / unplugging the Ravpower RP-PB187 charger, during paused media or while playing.
I am hearing audio details in media I usually don't hear. It is a bit distracting actually. I'm hearing details in ambient sound tracks that I missed before, going back to familiar tracks and video media.
At some point I'll do a duration test from 100% to 0% - 0% is likely 80%-90% of the capacity keeping the balance in reserve - to see how long I can run from battery only, I'll update here with the total duration.
Update: I DM'd @maheeinfy to follow the links to get details, and I added 110VAC to the first line. And, no it doesn't do 230VAC, that may be supported in other regions, but in the US we reserve 230VAC for larger appliances, motors, etc - 110VAC is the standard voltage for everything smaller - like Hifi hardware. The Ravpower RP-PB187 delivers a maximum of 250W from one active AC socket, and 300W total maximum if both AC sockets are active.
Here is the original post with links to products and review videos, I'm still updating it as info comes in.
https://www.head-fi.org/threads/sch...most-improbable-start-up.701900/post-16229107
Update: The Ravpower RP-PB187 ran the D90 MQA / TA-20 from 5:00pm to 4:00am (11 hours!!), and it had 2 bars out of 5 left on the power level indicators. That is with constantly playing music, videos - without a break (yeah, I napped a bit).
The Ravpower RP-PB187 is back on the charger while playing music, and I can't discern any degradation to the audio with the charger running at the same time. The audio still has that still quiet quality I noticed right away by running on battery power through the Ravpower RP-PB187.
I think I'll keep it running this way long term. And, now I know I should be able to get 12 hours+ of music out of the Ravpower RP-PB187 if there is a power outage. Maybe I can charge my phone, M15, tablet, BTR5, and other smaller devices at the same time - there seems to be plenty of reserve power after 11 hours.
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