Tekpower TP3003D-3
#7 in Multi-outputFull review
The cheapest way to get three linear rails on a hobby bench, if PC control is not needed.
Amazon $179.99$179.99
The Tekpower TP3003D-3 is the better bench power supply overall, rated 2.5 to 2.0. The Tekpower TP3003D-3 leads on output quality and value. The Tekpower TP3003D-3 costs $189.54 less ($179.99 vs $369.53).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
B&K Precision 1671A
#9 in Multi-outputFull review
A basic bench supply with fixed logic rails, for classrooms and service benches that do not need PC control.
Amazon $369.53$369.53
Which should you buy?
- Choose the Tekpower TP3003D-3 for output quality (1 mVrms ripple and noise vs 5 mVrms ripple and noise) and value ($0.92 per watt ($179.99, 195 W from the channel ratings) vs $2.33 per watt ($369.53, 158.5 W from the channel ratings)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every multi-output bench power supply; a clear win is highlighted. How we rank explains each one.
| Factor weight | Tekpower TP3003D-3 | B&K Precision 1671A |
|---|---|---|
| Overall rating | 2.5/5 | 2.0/5 |
| Value 25% | 48 $0.92 per watt ($179.99, 195 W from the channel ratings) | 22 $2.33 per watt ($369.53, 158.5 W from the channel ratings) |
| Output quality 20% | 71 1 mVrms ripple and noise | 33 5 mVrms ripple and noise |
| Resolution 15% | 0 100 mV / 10 mA readback resolution | 0 100 mV / 10 mA readback resolution |
| PC control 15% | 0 no PC interface | 0 no PC interface |
| Protection & features 10% | 30 over-current protection | 30 over-voltage protection |
| Warranty 15% | 0 1-year warranty | 0 1-year warranty |
Specifications
| Tekpower TP3003D-3 | B&K Precision 1671A | |
|---|---|---|
| Output | ||
| Type | Power supply | Power supply |
| Regulation | Linear | - |
| Channels | 3 | 3 |
| Channel ratings | 30 V/3 A, 30 V/3 A, 5 V/3 A | 30 V/5 A, 12 V/0.5 A fixed, 5 V/0.5 A fixed |
| Max voltage | 30 V | 30 V |
| Max current | 3 A | 5 A |
| Rated power | 195 W (channels added) | 158.5 W (channels added) |
| Ripple and noise | 1 mVrms / 20 mVp-p | 5 mVrms |
| Precision | ||
| Readback resolution | 100 mV / 10 mA | 100 mV / 10 mA |
| Control | ||
| PC interfaces | None | None |
| Over-voltage protection | - | Yes |
| Over-current protection | Yes | - |
| Build | ||
| Weight | 28 lb | 14.3 lb |
| Warranty | 1 year | 1 year |