เครื่องขยายสัญญานหูฟัง Mackie HM-400, Occupies 1 RU, 3-Headphone Outputs per Channel, XLR & 1/4 “Stereo Inputs and Outputs, 2-Band EQ, Balance, and Output Controls, L / R Mute Switches, สวิตช์โหมดสเตอริโอ / โมโน, ระบบวัดแสง LED, รวมสายไฟ
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฿6,990.00
เครื่องขยายสัญญานหูฟัง Mackie HM-400, Occupies 1 RU, 3-Headphone Outputs per Channel, XLR & 1/4 “Stereo Inputs and Outputs, 2-Band EQ, Balance, and Output Controls, L / R Mute Switches, สวิตช์โหมดสเตอริโอ / โมโน, ระบบวัดแสง LED, รวมสายไฟ
The Mackie HM-400 is a rack-mountable, 4-channel headphone amplifier designed to provide versatile headphone amplification for artists, musicians, and engineers monitoring through headphones in live stage applications and home, project, commercial, and mobile-recording studios. It features a stereo main output via XLR and 1/4″ jacks and twelve 1/4″ TRS stereo headphone outputs—three per channel—fed by a customizable blend of inputs.
One stereo main input via XLR and 1/4″ jacks can be mixed with a per-channel 1/4″ stereo aux input. Each channel offers 2-band EQ for quick tone shaping, stereo balance or main/aux input mix control, and output level adjustments. Also on each channel are switches for muting left and/or right signals and operating in stereo or mono. 7-segment LED meters display main input and per-channel output levels.
The HM-400 ships with an IEC power cable and occupies 1 RU in a standard 19″ rack.

| Number of Channels | 4 |
| Input Connections | 2 x XLR 3-pin balanced (one stereo pair) 2 x 1/4″ TRS balanced (one stereo pair, also accepts 1/4″ TS unbalanced) 1 x 1/4″ TRS stereo unbalanced for main input 4 x 1/4″ TRS stereo unbalanced for aux inputs |
| Output Connectors | 2 x XLR 3-pin balanced (one stereo pair) 2 x 1/4″ TRS balanced (one stereo pair, also accepts 1/4″ TS unbalanced) 12 x 1/4″ TRS stereo unbalanced headphone outputs |
| Maximum Input Level | Main Input: +15 dBu Aux Input: +20 dBu |
| Maximum Output Level | Headphone Outputs: 550 mW per channel at 47 Ohms (+21 dBu) |
| Input Impedance | Main Input: 20 kOhms balanced, 10 kOhms unbalanced Aux Input: 10 kOhms unbalanced |
| Output Impedance | Headphone Outputs: 3 Ohms unbalanced |
| Gain Range | Main Input: -66 to +18 dBu |
| Function Controls | Power on/off Main level knob L/R mute switches per channel Stereo/2-Ch switches per channel 2-band EQ per channel Balance knob per channel Output knob per channel |
| Frequency Response | 20 Hz to 20 kHz (±1 dB) |
| THD | <0.01% (+4 dBu, 1 kHz, unity gain) |
| Noise | -66 dB |
| CMRR | Main Input: >42 dB at 1 kHz |
| Display | 1 x input level meter 4 x output level meters |
| Power Requirement | 100 to 120 VAC, 50/60 Hz, 24 W 220 to 240 VAC, 50/60 Hz, 24 W |
| Power Connector | 1 x 3-pin IEC male, 250 VAC, 10 A |
| Construction Material | Heavy-gauge steel chassis |
| Dimensions (H x W x D) | 1.8 x 19.0 x 8.8″ / 46 x 483 x 224 mm |
| Weight | 8 lb / 3.6 kg |
| Package Weight | 10.5 lb |
| Box Dimensions (LxWxH) | 20.8 x 10.6 x 4.1″ |