sE Electronics DM3 Inline DI - Compact Active Direct Box

sE Electronics DM3 Inline DI – Compact Active Direct Box

The DM3 Inline DI from sE Electronics is an ultra-compact active direct box that brings the DYNAMITE technology of the DM1 and DM2 preamps to high-impedance instruments and sources. Featuring an Ultra-HiZ 10MΩ input and Class A buffer amplifier , it preserves the unique character of every guitar, bass, piezo, or keyboard with exceptional detail, while its –15dB/–30dB pads and 3-position ground-lift switch (including “On+”) eliminate hum, buzz, and RF noise simultaneously. The lockable ¼″ input jack and gold-plated XLR output ensure secure connections for live or studio use.

Main features

• Input impedance: Ultra-HiZ 10 MΩ for passive and piezo pickups.
• Output impedance: 86 Ω; recommended load > 1 kΩ.
• Frequency range: 10 Hz – 120 kHz (–0.3 dB).
• Attenuation pads: –15 dB and –30 dB switchable for high output sources.
• Ground-lift 3 positions: Off / Lift / On+ (RF attenuation).
• Exceptional Headroom: Maximum input level 19 dBV / 34 dBV / 49 dBV (0.5% THD).
• Output noise floor: 1 µV for virtually silent signal.
• Connectivity: Lockable ¼″ TRS input; Gold-plated male XLR output.
• Power supply: Phantom 48 V (IEC 61938); consumption 3.8 mA.
• Dimensions: Ø 20 mm × L 95.5 mm; Weight: 70 g.
• Accessories included: Screwdriver, ¼″ jack keychain and sE sticker.

Product benefits

• True to Sound: The Ultra-HiZ input and Class A buffer keep the original timbre intact.
• Total flexibility: Pads and ground-lift adapt the DI to any stage and source.
• Reliable connection: Lockable jack and gold-plated XLR prevent accidental disconnections.
• Pocket-ready design: Fits in your pocket and withstands years of intensive use.

Use cases

• Direct connection of vintage electric guitars and basses.
• DI for piezo pickups and acoustic pickups.
• Keyboards, synthesizers, drum machines and laptops.
• Mobile field recording and streaming solutions.

Frequently Asked Questions

• Does it require phantom power? Yes, +48 V phantom power for its active preamp.
• Can I use it with microphones? It's optimized for Hi-Z instruments; for microphones, use the DM1/DM2.
• How do I change the pad? Use a small screwdriver on the recessed switch for –15 dB or –30 dB.
• What does “On+” mode do? In addition to lift, it also attenuates radio frequency interference.

Description for projects

Active inline DI sE Electronics DM3: Ultra-HiZ input 10 MΩ, output 86 Ω, phantom 48 V, freq. 10 Hz–120 kHz, pads –15/–30 dB, 3-pos ground-lift with “On+”, lockable ¼″ jack, gold XLR, Ø 20×95.5 mm, 70 g.