Is there a wiring diagram for active pickups?

There is no wiring diagram. It is pretty simple for active pickups or non-active. There are 3 wires that attach to the "blend" pot for the pickups. I call it "blend" because there are 5 pots, V, B, M, T, and the "blend". V=volume, B=bass, M=middle, T=treble. "Blend" would be tone, but T is already labeled. Battery is there, and a input jack. I had to cut and solder the battery connector because my bass has a special compartment for the battery. You will need to solder the pickup wires, all 3. The 3 wires to the "blend" pot are for 1) neck PU (P1) 2) bridge PU (P2) and 3) ground/common. There is a bridge hardware ground (common) spare wire as well so you don't get shocked. You can see that spare wire in one of the photos, its a bare wire with black insulation.

Can you hook this up to passive bass pickups as a powered boost?

Yes, as my review said, when the pots for frequency adjustment are un the center position, it boosts the original volume of your pickup without coloring your tone

Thinking of installing this into my custom p bass. any recommendations ???

Swap the separated bass/treble pots for a concentric 100k pot. Also, if your p bqss also has just 1 pickup, remove the balance knob and change the volume knob for a push/pull 500k... so you can change passive / active

Where do i connect the pickups?

The blend pot has connections labeled "P1" and "P2" where you'll connect the pickups' hot wires. There's also a connection labeled "GND" where you'll connect both ground or negative connections.

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Prewired 2 Band Active Passive EQ Equalizer Electric Bass Preamp Circuit

Prewired 2 Band Active Passive EQ Equalizer Electric Bass Preamp Circuit

Product ID: 396999271

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Details

Brand
KAISH
Item Weight
0.08 Kilograms
Audio Output Effects
Equalization
Controls Type
Knob
Hardware Interface
1/4-inch Audio

📏Compact Size: 20.2 x 7 x 3.5 cm

🔊Treble Boost: +/- 10dB

🎚️Volume Control: B50K

Description

🎸 Unleash Your Bass Potential!

TAILORED TONES - Customize your sound with +/- 10dB adjustments for bass and treble.
ELEVATE YOUR SOUND - Experience a high-quality bass preamp that transforms your tone.
LIGHTWEIGHT DESIGN - Weighing only 80g, it’s perfect for on-the-go musicians.
PRECISION ENGINEERING - Designed for seamless integration with your electric bass.
QUALITY YOU CAN TRUST - Crafted to outperform inferior circuits from cheap factories.

The KAISH Prewired 2 Band Active Passive EQ Equalizer Electric Bass Preamp Circuit is a high-quality, lightweight preamp designed for electric bass guitars. With precise volume and tone controls, it allows musicians to customize their sound effortlessly. Weighing just 80 grams and featuring a compact design, this preamp is perfect for both studio and live performances.

Specifications

Item Weight	80 g
Package Dimensions	20.2 x 7 x 3.5 cm; 80 Grams
Item model number	K1148
Size	Prewired 2 Band

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