SRT Series Professional Powered Loudspeakers are designed for real-world performance. The latest acoustic processing technology, powerful amplifiers, and ultra-versatile SRT Mix Control + SRT Connect app means easy setup, incredible sound, and unbeatable reliability. If you've been debating an upgrade to your sound system, the time has come to ditch those dusty old speakers from the 80's. With the SRT Series, experiencing incredible sound, cutting-edge performance, and reliability is a no-brainer.

Mackie's filtering technology is not your typical speaker processing. The goal of the Advanced Impulse DSP is to remove all the anomalies that loudspeakers and horns contribute to a signal, from "honkiness" or "squelch" to "mushy" low end, effectively making the drivers "invisible" and output nothing but perfect, clean sound. By more intelligently (and more thoroughly) employing the benefits of FIR filtering, Advanced Impulse DSP eliminates undesired acoustic anomalies across the entire dispersion zone (horizontal and vertical), as well as frequency range and time domain. The main way this is accomplished is by measuring the negative frequency response and time domain impacts that each transducer and horn in the system introduces - on axis as well as off - and reversing/correcting for those anomalies before the signal hits the speaker. The result is the output from the speaker is fully corrected for flat, clear, time-aligned, and smooth sound throughout the entire time, space, and response domains.

The custom horn within each SRT Series speaker was designed with the goal to bring out the very best from the HF transducer while maintaining the flattest response possible at the crossover point. Surprise surprise... Mackie nailed it. The special design of this horn allows the compression driver to operate at near maximum efficiency. This means it gets louder and sounds better with less effort. The transition between the LF and HF is a symmetrical, flat response which is what helps make the incredibly smooth midrange in SRT Series speakers possible. Other loudspeakers feature some sort of protection and limiting to help them squeeze a dB or two out of the speaker. This is almost always at the expense of sound quality and is commonly experienced as diminished bass response and the "pumping" sound of the internal limiter having a bad day. When operating at very high levels (ears beware), the processor-controlled system monitoring analyzes the audio signal and identifies the problem areas, then dynamically applies multi-band compression to those specific frequencies rather than lowering the overall output. This keeps your levels where you want them and maintains the sound quality you expect. With the SRT Connect app available for iOS and Android devices, you get complete control over everything and then some for up to 2 speakers simultaneously. Quickly access levels, EQ, meters, and configuration. Plus, you can save memory presets to streamline setup at your next gig. When you link to another SRT Series loudspeaker, you get control over the entire system in the app, all in one view. No additional pairing or swapping back and forth on your device is required. For an incredibly simple music playback system, you can stream music directly from any Bluetooth enabled device.

Mackie SR18S 18" Subwoofer Features:

• A true workhorse for gigging professionals.
• 1600W Class-D amplifier is designed for ultra-reliable, consistent performance.
• Custom high-efficiency transducers ensure maximum clarity and accuracy.
• Increases efficiency of your full-range loudspeakers by taking care of the low end for the entire system.
• Built-Like-A-Tank to conquer every gig while lightweight for easy loading.
• Frequency response: 33 Hz - 200 Hz.
• Max SPL: 133 dB
• Custom Voicing Presets.
• Flat - Natural Balance between deep bass and overall output.
• Deep - Emphasizes ultra-low frequencies; Great for dance, rap, and electronic music.
• Punch - Prioritizes highest possible output level; Great for bands and rock music.
• Optimize for your system.
• Variable cross frequency.
• Polarity invert switch.
• Defeatable front LED.
• Stereo or mono-summing for single or dual subwoofer deployment.
• Variable level control (-6 dBu to +6 dBu.)
• Transparent system limiting and protection.
• Dedicated processing module monitors and protects the amplifier in real time.
• Sound quality and tonal balance is maintained even under heavy limiting.
• Input limiting keeps your source signal in check so if you're sending audio that's a bit too hot, the speaker will cool it down.
• Universal Power Supply (100 - 240 VAC) with Power Factor Correction for stable operation even with unstable AC power.
• Versatile I/O.
• Stereo XLR inputs.
• Stereo full-range XLR outputs.
• Stereo high-pass XLR outputs.
• Versatile configuration options.
• Integrated pole cup.
• Weight: 74.5 lb / 33.8 kg
• Dimensions: 23.3 x 23.0 x 27.0 in / 592 mm x 584 x 686 mm.

Each SR18S Retail Box Includes: (1) Mackie SR18S 18" 1600W Professional Powered Subwoofer
(1) IEC Power Cord *Please note: Customer return/Store display items are not brand new and may have minor imperfections. Due to the nature of a "Customer return item" we cannot guarantee that all box components listed, will be included. Because of this, the item is discounted accordingly and sold at close to cost or below. IDJNOW does guarantee that you will receive all pertinent components for the item to function in Its most basic form (usually just a power cord) and guarantees the item to be free from defect for 30 days from the day you receive it.