SMPS DC Filter P089ZB Kit
The PO89ZB, an inline DC filter for SMPS wall warts, preamps, HPAs, Korg NuTubes, B1, etc.
This filter is limited to single rail 48V DC, 3A applications. The kit contains top-quality parts as selected by the circuit’s designer which includes KEMET ESH477M050AH4AA or Nichicon UHW1H471MPD capacitors and top-quality Bournes inductors RLB0912-2R2ML.
Note that the kits will use either the Nichicons or Kemets depending on availability as these are often difficult to source. Both are considered the top two choices for low-ESR caps for the circuit and users will be happy using either.
For more information about the filter see the thread.
Included in this kit:
- R1, R3: 0.04R 5% 1W current sense resistor, LS 12mm
- R2, R4: 953ohm 1% 0.25W resistor
- C1, C2: 470 uF 50V capacitor, LS 5mm and Diam 10mm
- L1, L2: 2.2uH 7.5A 0.10R inductor, LS 5mm and Diam 9mm
- D1: 68V Unidir TVS 600W, DO-204 pkg
Was surprised how well this works, bought several, used one on my 6-24 crossover. To my ears, bass has more authority and image is more vivid . Will try the other on the Korg B1. Going to get 2 more for new projects. Highly recommended
Easy to assemble, all the necessary parts are included.
With my Meanwell LRS-75-24 SMPS I noticed a significant improvement in ripple and noise.
Wow, talk about an easy upgrade. Took about 15 minutes to solder together and about 20 minutes to drill 2 holes and implement into the B1 Korg kit chassis. I used taller standoffs so the boards were at different levels. Otherwise it would be a very tight fit.
My B1 build is pretty simple. Standard kit but with Vishay Dale resistors, .22uf wimas as input DC blocking caps. 10uf silmics in the middle and 6.8uf clarity caps on the output caps. Whatever I had in my box. Makes for a beautiful sounding preamp.
For the clean side of the Allo Digione Signature....... the filter works like a charme
Well done !
A great device works great and handy having all components in kit
Having recently built a ACP + and decided to use a Meanwell internal 3amp SMPS. I already have a lot gear using linear supplies, as I have been wary of using SMPS supplies in the past and putting out 'gunge' into the supply. However, I am thinking things have improved in their design and a lot of audio manufactures seem to be using them now as well. And as I like leaving stuff on, I thought why not try and save a few dollars on the electricity bill. This filter is very well priced and easy to implement. Not sure how much difference it makes but the ACP+ sounds very good to me.
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