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  Pendulum Audio Quartet Tube Recording Channel

Pendulum Audio Quartet
Pendulum Audio Quartet
 
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List Price: $3,700.00
Our Price: $3,200.00


Availability: Usually Ships in 24 Hours
Product Code: 9999-07806

 

Pendulum Audio Quartet Tube Recording Channel

Pendulum Audio Quartet Tube Recording Channel

Pendulum Audio Quartet Tube Recording Channel Details

The Pendulum Audio Quartet Tube Recording Channel is an all-purpose recording tool designed with the ultimate in sound quality and flexibility in mind. We have combined four elements - Mic/DI preamp, Opto-compressor, EQ, and De-esser -into a fully integrated package that it makes it easy to track any source. In addition, the Mic/DI preamp, EQ and Compressor/De-esser are completely independent entities that can be patched out and used separately - a hand feature that makes it a valuable tool for mixing as well as tracking.

The Mic/DI preamp, borrowed from our acclaimed MDP-1, can handle mics, pickups, keyboards, or line-level signals. It features phantom power, input pad, phase reversal, and a switchable lo-cut filter. Independent gain and output controls permit overdrive of the tube stage to vary the harmonic content of the preamp.

The Opto-Compressor, derived from the popular OCL-2, uses our proprietary optoelectronic cell, and has a sound all its own. It can be used in one of four modes: Fast (for 'invisible' compression), Average (rms responding), a new Vintage mode (with program-dependent response), or full manual operation.

Our new 3 band tube EQ, a modifed Baxandall design, is simple but very effective. The HI and LO bands have up to ±10dB of shelving at 15, 10 and 7 kHz, and 50, 100 and 200 Hz respectively. The MID band has a broad ±10dB peaking response centered at 0.7, 1.6, 2.2, 3.3, 5.0 and 6.5 kHz. The EQ can be placed before or after the compressor with the flip of a switch.

The new De-esser, which is implemented within the opto-compressor, uses an entirely new approach. A highly selective inductor-based detector triggers a very fast opto-inductive notch filter. The user can control the depth of the notch, which in turn controls amount of sibilance to be removed. When not triggered, the de-esser is out of the signal path entirely.

Pendulum Audio Quartet Tube Recording ChannelFeatures

  • The tube Mic/DI Preamp from the MDP-1
  • The tube Opto-Compressor from the OCL-2 using our proprietary optoelectronic cell
  • A new three band tube EQ with HI and LO shelving and peaking MID band
  • A new de-esser design using opto-inductive filtering and a highly selective detector
  • The Mic/DI, EQ and Compressor/De-Esser can be patched out and used independently.
  • Transformerless or transformer-balanced main output
  • Gold-plated switch contacts, I/O connectors and tube sockets
  • Polypropylene caps and metal film resistors (pairs matched to 0.1%)
  • Fully regulated high voltage (300V) and filament and bipolar power supplies with soft-start warm-up and output muting
  • Custom toroidal power transformer with shield for minimum hum
  • 120V or 240V ac voltage switch on the rear panel.
Pendulum Audio Quartet Tube Recording Channel Specifications
  • Circuit Type: Class A vacuum tube topology with transformerless or transformer-balanced output
    • Vacuum Tubes: (3) ECC83/12AX7A, (3) 6922/6DJ8
    • Power: 120V or 240Vac, 45W
    • Power Supplies: +300Vdc, +6.3Vdc,+12.6Vdc, ± 18Vdc, and +12vdc, fully regulated with soft-start warm-up and output muting
    • Dimensions:2U enclosure, 19" x 3.5" x 12.5" (48.2 x 8.8 x 31.8 cm)
    • Weight: 14lbs (6.4kg)
    • Note: Operating level is +4dBu = 0VU = 1.228v
    • Unless otherwise stated, all measurements are referenced to +4dBu, 0-80 kHz bandwidth.
    • All specifications are subject to change without notice.
    • As with all tube circuits, specifications will vary with tube brand, age or differences in internal structure.
  • Mic/DI Preamp
    • Mic/DI Preamp
      • Mic Preamp
      • Input Gain:+33 to +63dB in 3dB steps
      • Input Impedance:1500 transformer balanced and floating
      • Frequency Response:-1.0dB 15Hz and 65kHz with 10K load, +45dB gain, unbalanced or transformer-balanced
      • -1.0dB 22Hz and 60kHz with 600 load, +45dB gain, unbalanced or transformer-balanced
      • Noise: EIN less than -125dBu with 150 input load (> 83dB below +4dBu)
      • Distortion: THD+N less than 0.025%, +45dB gain, unbalanced output;
      • less than 0.06% from 200Hz-20kHz (< 0.6% at 20Hz), transformer-balanced output
    • DI Preamp
      • Input Gain:+20 to +50dB (Instrument), 0 to +20dB (Line) in 3dB steps
      • Input Impedance:10M or 1M (Instrument), 100k with 20dB pad (Line)
      • Frequency Response:-1.0dB 10Hz and 85kHz, with 10K load, + 20dB gain, unbalanced or transformer-balanced
      • -1.0dB 22Hz and 75kHz, with 600 load, + 20dB gain, unbalanced or transformer-balanced
      • Noise: EIN less than -113dBu with input shorted (> 83dB below +4dBu)
      • Distortion: THD+N less than 0.015%, 20Hz-20kHz, +20dB gain, unbalanced output;
      • less than 0.05% from 200Hz-20kHz (< 0.6% at 20Hz), transformer-balanced output
      • Max. Output Level: +32dBu into 10k load, Output control at maximum, unbalanced or transformer-balanced
      • +24dBu into 600 load, Output control at maximum, unbalanced or transformer-balanced
      • Phantom Power: +48Vdc applied to pins 2 and 3
      • Mic Pad: -20dB pad at the primary of the mic input transformer
      • Mic Phase: inverts the phase at the secondary of the mic input transformer
      • Mic Lo Cut: 12dB/octave rolloff at 75 or 150Hz
      • Polarity: input and output XLR connectors are pin 2 hot
  • Equalizer
    • Circuit Type: modified Baxandall-style feedback equalizer
    • Input Sensitivity:+4dBu
    • Input Impedance:10k
    • Frequency Bands
    • Hi: ±10dB shelving at 7, 10, or 15 kHz
    • Mid: ±10dB peaking at 0.7, 1.6, 2.2, 3.3, 5.0 and 6.5 kHz, Q=1.0
    • Lo: ±10dB shelving at 50, 100, or 200 Hz
    • Freq. Response: -1.0dB 16Hz and 45kHz with 10K output load, unbalanced or transformer-balanced
    • -1.0dB 20Hz and 45kHz with 600 output load, unbalanced or transformer-balanced
    • Noise: > 79dB below +4dBu
    • Distortion: THD+N less than 0.015% from 20Hz-20kHz, +20dB gain, unbalanced output;
    • less than 0.06% from 200Hz-20kHz (< 0.6% at 20Hz), transformer-balanced output
    • Max. Output Level: +32dBu into 10k load, Output control at maximum, unbalanced or transformer-balanced
    • +24dBu into 600 load, Output control at maximum, unbalanced or transformer-balanced
  • Opto-Compressor
    • Circuit Type: optical input attenuator and class A vacuum tube gain stage
    • Input Sensitivity: +4dBu
    • Input Impedance: 10k
    • Freq. Response: -1.0dB 8Hz and 100kHz with 10K output load, unbalanced or transformer-balanced
    • -1.0dB 20Hz and 100kHz with 600 output load, unbalanced or transformer-balanced
    • Noise: > 76dB below +4dBu , output control at unity gain
    • > 76dB below +4dBu , output control at +15dB
    • Distortion: THD+N less than 0.016% from 20Hz-20kHz, +20dB gain, unbalanced output;
    • less than 0.06% from 200Hz-20kHz (< 0.6% at 20Hz), transformer-balanced output
    • Max. Output Level: +32dBu into 10k load, Output control at maximum, unbalanced or transformer-balanced 
    • +24dBu into 600 load, Output control at maximum, unbalanced or transformer-balanced
    • Max. Gain Reduction: > 30dB
    • Threshold: off to -20dB
    • Ratio: 1.5:1 to 15:1
    • Output:-5 to +15dB
    • Modes: fast (peak-averaged), average (rms), vintage (program-dependent) or manual operation;
    • attack time varaible from 1.0ms to 100ms
    • release time varaible from 0.1s to 2s