The Headliner R4 Mark2 is a four-channel analog rotary DJ mixer designed for DJs who value warm analog sound, tactile control, and an intuitive mixing experience. Featuring large rotary channel volume controls, 3-band isolator EQ on each channel, and genuine ALPS potentiometers, it provides smooth and precise adjustments for creative mixing. Each channel includes dedicated gain control with a Peak LED, headphone cue selection, filter activation, and flexible input connectivity for turntables, media players, drum machines, samplers, and other audio sources.

The R4 Mark2 features a refined analog filter with selectable high-pass and low-pass modes, along with dedicated Frequency and Resonance controls for expressive sound shaping. Its redesigned filter circuitry provides clean engagement and smooth performance during transitions and filter sweeps. Dual LED master-output meters provide clear visual monitoring of output levels during performances.

Built with a sturdy metal chassis and premium dark wood side panels featuring rich grain and precision-etched Headliner branding, the R4 Mark2 combines durability with a timeless appearance. Channels 1–3 feature dedicated stereo line RCA inputs and switchable stereo phono/line inputs, while Channel 4 provides additional microphone connectivity through its dedicated microphone input.

Key Features

• Four-channel analog rotary DJ mixer with warm analog sound.
• Large rotary channel volume controls with genuine ALPS potentiometers.
• 3-band isolator EQ and dedicated gain control with Peak LED on each channel.
• One switchable stereo phono/line RCA input per channel.
• Dedicated stereo line RCA inputs on channels 1–3.
• Supports up to seven connected stereo line-level sources.
• Dedicated microphone input on Channel 4 with access to EQ, filter, and cue routing.
• Additional front-panel microphone input with level control.
• Selectable high-pass and low-pass analog filter with Frequency and Resonance controls.
• Redesigned analog filter circuitry for smooth and reliable performance.
• Independent headphone cue selection and filter activation switches on each channel.
• Headphone monitoring with Cue/Master blending and split-monitoring functionality.
• Dual 1/4-inch and 1/8-inch headphone outputs.

Ideal For

• Professional DJs and rotary mixing enthusiasts.
• Multi-channel DJ performances and club installations.
• House, techno, funk, soul, and disco music performances.
• Professional DJ booths and performance venues.
• Vinyl and digital media player setups.
• Home DJ studios and recording environments.
• Livestreaming and DJ broadcasts.
• Live performances requiring microphone integration.

Inputs & Outputs

• Microphone Inputs: Dedicated Channel 4 microphone input and additional front-panel microphone input with level control.
• Line Inputs: Three dedicated stereo RCA line inputs on Channels 1–3.
• Phono/Line Inputs: Four switchable stereo RCA phono/line inputs, one per channel.
• Master Outputs: Balanced XLR and unbalanced RCA stereo outputs.
• Booth Outputs: Balanced XLR and unbalanced RCA stereo outputs.
• Record Output: Unbalanced stereo RCA output.
• Headphone Outputs: 1/4-inch and 1/8-inch headphone connections.
• Power Input: Locking Mini XLR connection for the external split-rail power supply.

Frequently Asked Questions

How many channels does the Headliner R4 Mark2 have?

The R4 Mark2 is a four-channel analog rotary DJ mixer. Each channel features independent gain, rotary volume, 3-band isolator EQ, headphone cue selection, and filter activation controls.

Can the R4 Mark2 connect to turntables and media players?

Yes. Each channel includes a switchable stereo phono/line RCA input, while Channels 1–3 also feature dedicated stereo line RCA inputs. This configuration supports up to seven connected stereo line-level sources.

Does Channel 4 support microphone input?

Yes. Channel 4 includes a dedicated microphone input that routes through its gain, 3-band isolator EQ, filter, cue, and rotary volume controls, providing additional flexibility for vocal performances and DJ hosting.

Does the mixer include a second microphone input?

Yes. An additional microphone input is located on the front panel and features its own level control.

Does the R4 Mark2 have built-in analog filters?

Yes. It features selectable high-pass and low-pass analog filtering with dedicated Frequency and Resonance controls for sound shaping and transitions.

Can DJ performances be recorded directly from the mixer?

Yes. The dedicated unbalanced RCA Record output allows performances to be recorded independently of the main output level.

Does the mixer include balanced outputs?

Yes. The R4 Mark2 provides balanced XLR Master and Booth outputs, along with unbalanced RCA connections for flexible audio integration.

Full Technical Specifications

General Specifications

Product Model	R4 Mark2
Device Type	Analog rotary DJ mixer
Number of Channels	4
Mixer Type	Analog
Channel Volume Controls	Large rotary controls
Potentiometers	Genuine ALPS
Equalizer	3-band isolator EQ per channel
Channel Gain Control	Yes, with Peak LED
Analog Filter	Selectable high-pass and low-pass
Filter Controls	Frequency and Resonance
Filter Activation	Individual channel switches with LEDs
Input Configuration	Stereo RCA line and switchable phono/line inputs
Maximum Connected Stereo Line Sources	7
Channel 4 Microphone Routing	Gain, EQ, filter, and cue routing
Additional Microphone Input	Front-panel input with level control
Headphone Monitoring	Cue/Master blending and split monitoring
Level Monitoring	Dual LED master-output meters
Internal Construction	Modular
Chassis Construction	Metal
Side Panels	Premium dark wood with precision-etched branding

Audio Input Specifications

Microphone Nominal Input Level	-50 dBu
Microphone Frequency Response	20 Hz–20 kHz (+/- 0.1 dB)
Microphone THD + N	Less than 0.1%
Microphone Input Impedance	1.2 kΩ
Line Nominal Input Level	-10 dBV (-7.8 dBu)
Line Gain Range	-12 dB to +12 dB
Line Frequency Response	20 Hz–20 kHz (+0/-0.5 dB)
Line THD + N	Less than 0.05%
Line Input Impedance	10 kΩ
Phono Nominal Input Level	-40 dBu (@ 1 kHz)
Phono Gain Range	-12 dB to +12 dB
Phono Equalization	Active RIAA equalization
Phono THD + N	Less than 0.05%
Phono Input Impedance	47 kΩ
Phono Input Capacitance	100 pF
Phono Preamp	Single-stage
Phono Capacitors	Ceramic

Main Output Specifications

Balanced Nominal Output Level	+4 dBu
Balanced Maximum Output Level	+20 dBu
Unbalanced Nominal Output Level	-10 dBV (-7.8 dBu)
Unbalanced Maximum Output Level	+12 dBu
Frequency Response	20 Hz–20 kHz (+0/-1.5 dB)
Residual Noise	Less than -86 dBu (Line to Master, A-weighted)
Dynamic Range	Greater than 100 dB (A-weighted)
Crosstalk	Less than -65 dB
THD + N	Less than 0.05%

Headphone Specifications

Maximum Output Level	70 mA/channel into 150 Ω
Minimum Load Impedance	32 Ω/channel
Headphone Amplifier	High-current
Headphone Connections	1/4-inch and 1/8-inch
Cue/Master Mixing	Yes
Split Monitoring	Yes
Headphone Level Control	Yes

Power Specifications

Power Supply Type	External split-rail power supply
Power Supply Connector	Locking Mini XLR
AC Input Voltage	100–240V AC
AC Input Frequency	50/60 Hz
DC Output Voltage	+/-15V
DC Output Current	500 mA
Power Switch	Rear-panel push-button

Physical Specifications

Enclosure	Sturdy metal chassis
Side Panel Material	Dark wood
Side Panel Finish	Rich grain with precision-etched branding
Dimensions (W × D × H)	12.6 × 12.2 × 4.2 inches
Dimensions (W × D × H)	320 × 310 × 106 mm
Product Weight	7.7 lbs (3.5 kg)