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SPL Auditor Headphone Amplifier  From SPL

Headphone Amplifier

SPL

Manufacturer's Description from SPL

The AUDITOR is a new headphone amplifier based upon SPL's proprietary 120V technology. Besides the Phonitor, the AUDITOR represents a straightforward, puristical concept. The sound results from its benchmarking specs can be experienced with all dynamic headphones from 30 ohms upwards. 

With headphones, ear fatigue can begin relatively soon, and there are several causes. First, some cans themselves may not be that comfortable to wear... 

Moreover, a standard headphone amplifier is often an additional important reason for premature ear fatigue. Almost without exception, present-day headphone amplifiers employ comparatively undemanding IC’s. In the best cases they might work with symmetrical voltages of +/-15 V to +/-18 V, and in less favorable cases, with only a simple supply of 9 or 12 V from cheaper external “wall-wart“ power supplies. 

But the voltage level acts in circuitry much like the cubic inch capacity to the productive power of a combustion engine: Cubic inch capacity is replaceable with nothing but more cubic inch capacity – and in the productive power of electronics, voltage level functions similarly.

For some years, now, SPL has addressed this issue in all of its mastering product series through its own specifically developed 120 volt technology. Consoles and signal processors of the SPL Mastering Series appear as central elements in installations of today’s most renowned mastering houses (e. g. Bob Ludwig’s Gateway Mastering & DVD in the USA, Simon Heyworth’s Super Audio Mastering in Great Britain or the Galaxy Studios in Belgium). This 120 volt technology is based on discrete operation amplifiers from SPL’s own production, developed and perfected over many years by SPL’s co-founder and chief developer, Wolfgang Neumann. The SUPRA OPs have a signal to noise ratio of 116 dB and offer a 34 dB headroom – that yields an unequalled 150 dB dynamic range.

The musical result is not to be mistaken: Regardless of the monitoring means, regardless of how loud you monitor – the Auditor always remains a distant, impartial factor unaffected when used to capacity and beyond being overloaded. The phase stability is always perfect, its THD next to immeasurable. The SUPRA OPs cannot be stressed in the most stressful circumstances, and for precisely this reason its musical sound is always relaxed and spacious. All frequencies are reproduced in balance, basses are stable and tight, mids are clear and differentiated and highs remain transparent and soft.

Such supreme and heretofore unreachable neutrality in audio reproduction is the direct consequence of SPL's technical approach and basis in 120 volt technology: Possible disturbances from such as noise or distortion are so slight that we even arrive at the boundaries of the best measuring equipment, and what remains is quite simply unaltered musical sound.

Or in other words: simply sounds.

SPL

About Manufacturer

Sound Performance Labs! Full Range of Analog, Tube, and Digital rack gear with an innovative twist. With their most famous transient designer product, SPL has quickly become a household name in both the recording and live sound arenas.

Specifications

Audio

  • Frequency Response: ‹5 Hz to ›200 kHz (-3 dB)
  • CMR:-80 dBu (@1 kHz, 0 dBu input level and unity gain)
  • Crosstalk: -84 dB (@1kHz)
  • THD: 0,001 % (@ 1kHz, 0 dBu input level and unity gain)
  • Noise: -97 dBu (A-weighted)
  • Dynamic Range: 129 dB (@ 600 Ohms Impedance)

Inputs (XLR connections, electronically balanced)

  • Impedance: ca. 20 Ohms balanced/ca. 10 Ohms unbalanced 
  • Maximum Input Level: +24dBu

Outputs

  • XLR Connections: Input thru, electronically balanced
  • Headphone Output: 6,35 mm stereo TRS connection 
  • Pin Wiring Tip = left, Ring = right, Shaft = GND 
  • Impedance: 9 Ohms

Power Amplifier

  • 1,7W (+32,2dBm) @ 1 kHz and 600 Ohms connection
  • 360mW (+25,6dBm) @ 1 kHz and 30 Ohms connection

Power Supply

  • Voltages: 230V AC, 50Hz/120V AC, 60Hz
  • Power Consumption:max. 5,6 W/7,9  VA/0,03 A
  • Fuses (slow blow): 200-240 V AC: 200 mA/100-120 V AC: 400 mA

Dimensions & Weight

  • Height x width x depth: 95 x 210 x 315 mm
  • Height with lifted feet: 127 mm
  • Depth with volume knob: 335 mm
  • Weight: 2.65 kg
  • 0dBu = 0,775V. Subject to change without notice.