Mackie HD1521
15" Two-Way High-Definition Powered Speaker

HD1521

Mackie's HD1521 2-Way High-Definition Powered Loudspeaker delivers class-leading power, unmatched clarity and extreme flexibility.  Class-D Fast Recovery™ amplification produces 1600W of peak system power.  High-Definition Audio Processing incorporates next-generation Mackie "Active" electronics and re-defines powered loudspeakers by implementing Mackie's patented acoustic correction processing.  System tuning and custom transducer design by EAW ensures an optimized system that sounds great every time.  The compact & rugged all-wood enclosure offers superior protection and a clean look that will blend seamlessly into most environments.

The HD1521 incorporates the latest in Class-D amplifier technology to deliver 1600W of peak system power.  Both internal amps are designed using Mackie's legendary Fast Recovery™ circuitry.  Other amplifiers can "latch" when pushed to clipping, leading to distorted audio, but Fast Recovery™ amplification reacts instantly to the occasional aggressive transient, drastically reducing the time it takes for the amp to recover, ensuring clean audio under demanding situations.

The HD-1521's bi-amplified system is the highest powered 2-way available in its class, offering a 700W RMS low-frequency amplifier and a 100W RMS high-frequency amplifier that, when combined, can deliver a max SPL up to 135dB (calculated, measured maximum SPL of 125dB).

Mackie created the "Active" electronics game long ago, incorporating precision crossovers and transducer time/phase alignment processing into the loudspeaker.

Even the most expensive loudspeakers on the market have inherent sonic issues that arise from the very nature of loudspeaker design.  Horn-loaded drivers tend to have a "honkiness" to them and there are physical resonances in the upper range of cone drivers that can sound nasty.

The key to high-definition live sound is the detailed measurement and analysis of the inherent problems of horns and woofers.  After that, the creation and application of acoustic correction algorithms work to correct these very issues.

The HD1521 is a perfectly tuned system that is the product of the engineering team at Eastern Acoustic Works (EAW) who fine-tuned the system for complete optimization and custom-designed the transducers, ensuring maximum efficiency and performance.

The high-end 15? neodymium woofer features a 3? voice coil and is built to handle the massive power delivered by the low-frequency amplifier.  The neodymium magnet provides a greater magnetic field with far less material, making the woofer extremely lightweight without sacrificing performance.  And the large 3? voice-coil is built to handle and dissipate far more heat than traditional designs.

The 1.75? compression driver reproduces high-frequencies with a diaphragm made using heat-treated titanium.  Heat-treating increases the rigidity of the diaphragm, eliminating distortion and increasing the life of the driver.

For added flexibility, Mackie has included a user-adjustable 3-band EQ on the rear panel of every HD Series loudspeaker.  It's not just a two-position EQ switch that can only bet set to "flat" or  "boost", but a high-quality 3-band EQ with Hi and Lo shelving and a sweepable mid frequency, each with +/- 3dB of gain.  This allows you to customize the loudspeakers for the task at hand.

The HD1521's 15 mm thick birch plywood cabinets are extremely rugged, with substantial internal bracing and a coating of durable, textured black paint.  A cold-rolled, powder-coated steel grill provides a sleek, modern look that is designed to blend into the environment.  (You can even turn off the trademark blue LED on the front of the speaker!)

The HD1521 can be integrated into any existing system thanks to a wide variety of placement options.  Standard M10 eyebolts convert the HD1521 into a professionally flown system, with twelve integrated fly points for vertical or horizontal rigging.  It is also pole mountable, either on a standard tripod or mounted over a subwoofer.  And of course you can simply stack them on your subs or place them on stage.  Whether stacked, pole-mounted or flown, you can count on the HD1521 to be stable and sturdy.

Features:

• 1600W of ultra-efficient Class-D Fast Recovery™ amplification
  - LF 700W RMS / 1400W peak
  - HF 100W RMS / 200W peak
• High-definition audio processing:
  - Revolutionary patented acoustic correction
  - Transducer time alignment and phase correction
  - Precision 2-way crossover
• Custom designed transducers by EAW
  - 15" neodymium woofer with 3" voice coil
  - 1.75" compression driver with heat-treated titanium diaphragm
• User-adjustable 3-band contour EQ with sweepable mid-frequency
• Ultra-compact and lightweight - 80 lbs).
• Integrated limiting and protection circuitry
• Rugged all wood cabinet (15mm birch plywood)
• 12 integrated fly points for horizontal and vertical rigging
• Stand/pole mountable

Specifications:

• Frequency Response (-10 dB): 40hz - 20kHz
• Coverage Pattern: 80 degrees x 50 degrees
• Max. Peak SPL: 135 dB (calculated from driver sensitivity and amplifier power)
• Max. Peak SPL: 125 dB (measured with pink noise, free field at 1 meter, before limiting)
• Crossover Point: 1200Hz
• HF Driver: 1.75" (44.5 mm) heat-treated titanium compression driver
• LF Driver: 15" (381 mm) neodymium woofer with 3" (76.2 mm) voice coil
• Total System Power: 800W RMS/1600W Peak
  Low frequency: 700W RMS/1400W Peak
  High frequency: 100W RMS/200W Peak
• Amplifier THD: <0.03%
• Amplifier Design: Class-D
• Basic design: Trapezoidal, 20 degree included angle
• Material: 15 mm exterior grade premium birch plywood
• Finish: High durability black textured paint
• Handles: One on each side
• Grill: Powder-coated galvanized steel
• Fly points: Twelve M10 x 1.5mm
• Height: 30" (762 mm)
• Front Width: 18.25" (463.5 mm)
• Rear width: 11.82" (300.2 mm)
• Depth: 18.81" (477.8 mm)
• Weight: 80 lbs. (36 kg)
• AC input: 120VAC/60 Hz, 9 amps

Our Part #  HD1521