Headliner HL90125 - R4 Mark2 4-Channel Rotary DJ Mixer

The Headliner R4 Mark2 is a 4-channel analog rotary DJ mixer for club, vinyl and hi-fi style DJs who want large rotary level controls, isolator EQ and a resonant filter on every channel. Every channel has a switchable phono/line input, channels 1–3 add a dedicated line input, and channel 4 adds a mic input that runs through the full channel strip.

The Mark2 update brings redesigned filter circuitry, more flexible input routing and new dark wood side panels on the metal chassis.

Key Features:

• Four channels with large rotary volume controls
• Switchable phono/line RCA input on every channel; dedicated line inputs on channels 1–3
• Channel 4 mic input routed through gain, EQ, filter and cue, plus a second front-panel mic input
• 3-band isolator EQ, gain with peak LED, cue selector and filter switch on every channel
• Selectable high-pass/low-pass analog filter with Frequency and Resonance controls
• Independent Master and Booth outputs, balanced XLR and unbalanced RCA, plus RCA Record output
• High-current headphone amp with Cue/Master mix, split monitoring, and 1/4″ and 1/8″ outputs
• Metal enclosure with dark wood side panels; external split-rail power supply with locking mini-XLR

Headliner R4 Mark2 — 4-Channel Analog Rotary DJ Mixer

• Format: 4-channel analog rotary mixer
• Inputs: Switchable phono/line RCA on all 4 channels; dedicated stereo line RCA on channels 1–3
• Microphone: Channel 4 mic input (full channel strip) plus front-panel mic input with level control (−50 dBu nominal, 1.2 kΩ)
• EQ & Filter: 3-band isolator EQ per channel; selectable high-pass/low-pass filter with Frequency and Resonance
• Outputs: Master and Booth: balanced XLR (+4 dBu nominal, +20 dBu max) and unbalanced RCA; unbalanced RCA Record
• Phono Inputs: −40 dBu nominal, active RIAA, 47 kΩ, 100 pF
• Line Inputs: −10 dBV nominal, −12 to +12 dB gain, 10 kΩ
• Frequency Response: 20 Hz–20 kHz (+0/−1.5 dB, main outputs)
• Noise & Distortion: Dynamic range >100 dB (A-weighted); THD+N <0.05%; crosstalk <−65 dB
• Headphones: 1/4″ and 1/8″; 70 mA/ch into 150 Ω, 32 Ω minimum load
• Power: External supply, locking mini-XLR; 100–240 V, 50/60 Hz in, ±15 V 500 mA out
• Dimensions: 12.6″ × 12.2″ × 4.2″ (320 × 310 × 106 mm)
• Weight: 7.7 lb (3.5 kg)
• MPN: HL90125  ·  UPC: 644197089617

- Headliner R4 Mark2