DELTA-AX Active evolution

Active plywood loudspeakers.  12″, 15″ full range with 15″ and 18″ Subs

  • Class D amplified active loudspeakers
  • Custom Wharfdale Pro transducers
  • Premium Baltic Birch plywood construction
  • 2-way models feature internal Qubit DSP
  • Subwoofers with Low Pass filter control
  • 4-way rubberised handles
  • Large voice coils
  • Impressive SPL figures
  • For install or on the road

Wharfedale Pro DELTA Series can be seen and heard around the world. Day in, day out, DELTA loudspeakers deliver the sound for the most demanding of performers and venues. DELTA loudspeakers have earnt their own reputation as a leading series of active and passive loudspeakers.

October 2019 sees the latest evolution of the DELTA active models. The new DELTA-AX series of active loudspeakers.

Using the same well-proven custom made drivers and the same premium Baltic birch plywood construction as previous DELTA active models, the new family boasts improved amplification electronics to deliver exceptional power….AND reliability.

Need to spot the difference between an original DELTA active and the new DELTA-AX series? The new series are proudly sporting the iconic Wharfedale Pro logo, embossed into the top surface and they come with an eye-catching swing tag. In addition, a full cloth front grille protects the advanced drivers from moisture, insects and dust.

DELTA-AX
Four familiar models but now with iconic design and improved electronics. “Pro-active Improvements”

Delta-ax12

750 watts
Continuous
  • 12″ two-way bi-amplified active loudspeaker
  • 750 watts Continuous power
  • 1500 watts Peak power
  • 90° x 45° dispersion
  • 2″ HF Compression driver
  • 3″ LF voice coil
  • Advanced Internal QuBit DSP 
  • 130 dB Max SPL @ 1 meter

Delta-ax15

750 watts
Continuous
  • 15″ two-way bi-amplified active loudspeaker
  • 750w Continuous power
  • 1500w Peak power
  • 90° x 45° dispersion
  • 2″ HF Compression driver
  • 3″ LF voice coil
  • Advanced Internal QuBit DSP
  • 131 dB Max SPL @ 1 meter

Delta-ax15B

900 watts
Continuous
  • 15″ active subwoofer
  • Low pass filter control
  • Hi Pass link outputs
  • 42 Hz – 200 Hz Frequency response
  • 180° phase switch
  • 4″ LF voice coil
  • 900 watts Continuous
  • 1800 watts Peak
  • 130 dB Max SPL @ 1m 

delta-AX18B

1000 watts
Continuous
  • 18″ active subwoofer
  • Low pass filter control
  • Hi Pass link outputs
  • 38 Hz – 200 Hz Frequency response
  • 180° phase switch
  • 4″ LF voice coil
  • 1000 watts Continuous
  • 2000 watts Peak
  • 132 dB Max SPL @ 1m

Birch PLywood

All Delta-AX models use premium Baltic birch plywood construction.

Not only does this create a solid and durable cabinet, but it also contributes to the overall sound and character.

Delta-AX is also covered in our most durable and hard wearing Rhino Rock paint finish. This ensures that a Delta-AX will always look as good as the day you unboxed it.

routed logo

Delta-AX features a routed Wharfedale Pro logo.

This fresh design helps to distinguish between the original Delta-A models and the updated Delta-AX models.

It is also a logo to be proud of. A logo that lets your audience know that the sound of your even will be of the highest possible quality.

Full Range

The full range models (Delta-AX12 and Delta-AX15) use 2 x Class D amplifiers.  These are specifically tuned and selected to be the perfect match for the HF and LF drivers inside.

With multiple analogue inputs, Delta-AX full range models are ready to connect to whatever signal source you have.

Subwoofers

The 15″ and 18″ active subwoofers use a single Class D amplifier to drive the LF transducer.

Inside the Delta-AX subwoofers is a highly efficient Class D amplifier.

Using convection cooling, Delta-AX models do not use any internal fans. Fans add to product weight, ambient noise and can lead to unreliability. Delta-AX has no fans!

The amplifier has been perfectly matched to the custom low frequency driver. This perfect combination leads to maximum efficiency and supreme output SPL.

SPECIFICATIONS

Model NameDELTA-AX12DELTA-AX15DELTA-AX15BDELTA-AX18B
System TypeActive 12” 2-way Bi-AmplifiedActive 15” 2-way Bi-AmplifiedActive 15” SubwooferActive 18” Subwoofer
Frequency Response (+/-3 dB)60 Hz – 20 kHz50 Hz – 20 kHz42 Hz – 200 Hz38 Hz – 200 Hz
Frequency Range (-10 dB)55 Hz – 20 kHz45 Hz – 20 kHz
Calculated Maximum SPL @1 m130 dB131 dB130 dB132 dB
Low Frequency Transducer –
Size (mm / inches)
332 mm / 12″404 mm / 15″404 mm / 15″470 mm / 18″
Coil Size (mm / inches)75 mm / 3″75 mm / 3″101.6 mm / 4″101.6 mm / 4″
Impedance4 Ω4 Ω8 Ω8 Ω
High Frequency Transducer – TypeCompression DriverCompression Driver
Coil Size (mm / inches)51.2 mm / 2″51.2 mm / 2″
Exit Size (mm / inches)35.6 mm / 1.4″25 mm / 1”
Diaphragm MaterialTitaniumTitanium
Impedance8 Ω8 Ω
Nominal Coverage (H x V)90° x 45°90° x 45°
Amplifiers
Low-Frequency Power Amplifier RMS600 w (Class D)600 w (Class D)900 w (Class D)1000 w (Class D)
High-Frequency Power Amplifier RMS100 w (Class D)100 w (Class D)NANA
Amplifier ProtectionYesYesYesYes
Power On ProtectionPower switch on/off mutePower switch on/off mutePower switch on/off mutePower switch on/off mute
Thermal ProtectionAmplifier Shut Down. Auto ResetAmplifier Shut Down. Auto ResetAmplifier Shut Down. Auto ResetAmplifier Shut Down. Auto Reset
Low Line Voltage Shut Down80% Nominal Line Voltage80% Nominal Line Voltage80% Nominal Line Voltage80% Nominal Line Voltage
Driver ProtectionIndependent LF and HF LimitersIndependent LF and HF LimitersYesYes
DC and Short ProtectionYesYesYesYes
Clip LimiterTurns on Appro x 650 w OutputTurns on Appro x 650 w OutputTurns on Appro x 900 w OutputTurns on Appro x 1000 w Output
Limiter IndicatorRed LEDRed LEDRed LEDRed LED
Power IndicatorGreen LEDGreen LEDGreen LEDGreen LED
Connectors
Input A – typeSwitchable Balanced Mic or Line Level InputSwitchable Balanced Mic or Line Level InputBalancedBalanced
Input SensitivityMic:-40 dBu Line:0 dBuMic:-40 dBu Line:0 dBuLine:0 dBuLine:0 dBu
Maximum Input Level22 dBu22 dBu22 dBu22 dBu
Input ConnectorXLR 1/4” Combo jack / 2 x RCAXLR 1/4” Combo jack / 2 x RCATRS jack and Female XLRTRS jack and Female XLR
Input ImpedanceBalanced:20 KΩ Unbalanced:10 KΩBalanced:20 KΩ Unbalanced:10 KΩBalanced:20 KΩ Unbalanced:10 KΩBalanced:20 KΩ Unbalanced:10 KΩ
Line Output ConnectorSwitchable LOOP/MIX Balanced
Male XLR Connector
Switchable LOOP/MIX Balanced
Male XLR Connector
Male XLR ConnectorMale XLR Connector
Impedance BalancedBalanced: 200 Ω Unbalanced:100 ΩBalanced: 200 Ω Unbalanced:100 ΩBalanced: 200 Ω Unbalanced:100 ΩBalanced: 200 Ω Unbalanced:100 Ω
Loop Gain0 dB0 dB0 dB0 dB
AC Power details – Power SupplyHigh Efficiency SMPSHigh Efficiency SMPSHigh Efficiency SMPSHigh Efficiency SMPS
AC Power OptionsAC100-120 V~ / 220-240 V~,50/60 HzAC100-120 V~ / 220-240 V~,50/60 HzAC100-120 V~ / 220-240 V~,50/60 HzAC100-120 V~ / 220-240 V~,50/60 Hz
Power On IndicatorGreen LEDGreen LEDGreen LEDGreen LED
Hardware – RiggingM10 x 6M10 x 6
Enclosure Material and finish15 mm Plywood15 mm Plywood15 mm Plywood15 mm Plywood
Colour OptionsBlack Rhino PaintBlack Rhino PaintBlack Rhino PaintBlack Rhino Paint
Grille Material & Finish1.2 Steel1.2 Steel
Unpacked dimensions – Height640 mm / 25.2″700 mm / 27.56″471 mm / 18.54″539 mm / 21.22″
Width (Front)390 mm / 15.35″446 mm / 17.56″471 mm / 18.54″539 mm / 21.22″
Width (Back)241.2 mm / 9.5″281.4 mm / 11.08″471 mm / 18.54″539 mm / 21.22″
Depth373 mm / 14.69″406 mm / 15.98″600 mm / 23.62″650 mm / 25.59″
Packed Dimensions – Height745 mm / 29.3”803 mm / 31.6”556 mm / 21.89″624 mm / 24.57″
Width (Front)566 mm / 22.3”638 mm / 25.1”672 mm / 26.46″722 mm / 28.43″
Width (Back)328 mm / 12.9”366 mm / 14.4”672 mm / 26.46″722 mm / 28.43″
Depth464 mm / 18.3”498 mm / 19.6”543 mm / 21.38″611 mm / 24.06″
Net Weight (kg / lbs)27.9 kg / 61.2 lbs33 kg / 72.6 lbs33.1 kg / 72.82 lbs38.4 kg / 84.48 lbs
Gross Weight (kg / lbs)32.5 kg / 71.5 lbs38.5 kg / 84.7 lbs36.7 kg / 80.74 lbs44.3 kg / 97.46 lbs

Downloads

Delta-AX Media Library

External Onedrive link