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Home arrow English content arrow audio engineering arrow PALMER PDI-CTC | Active DI box with 4-band filtering, true tube circuit
PALMER PDI-CTC | Active DI box with 4-band filtering, true tube circuit PDF Drucken E-Mail
Geschrieben von Adam Hall   
09.11.2009

The Palmer PDI-CTC (Palmer Direct Injection Box - Classic Tube Circuit) is intended for DI and preamp use. For the latter, a 4-band filter circuit has been integrated.

Featuring a true tube circuit with output transformer, the PDI-CTC PALMER PDI-CTC | Active DI box with 4-band filtering, true tube circuit (Bild: Adam Hall)provides a balanced signal at the XLR output connectors that is electrically isolated. There are no semiconductors throughout the entire signal path including the filter stage. The PDI-CTC is mains powered, and the integrated power supply generates the necessary tube voltages.

In addition to the standard parallel and balanced mic level outputs the PDI-CTC also features both a balanced line level and a ¼“ unbalanced low impedance output.

The wide band low, lo-mid, hi-mid, and high frequency filters are "musically" voiced. A bell- shape filter characteristic has been
chosen to prevent boosting undesirable subsonic frequencies as well as those beyond the audio range. To exactly reproduce sound settings each and every time Palmer decided on individual toggle switches to set each of the four frequency bands to 0dB, +4dB, or +8dB.


Essentially, the PDI-CTC circuit design is based on the idea to PALMER PDI-CTC | Active DI box with 4-band filtering, true tube circuit (Bild: Adam Hall)realize the shortest possible signal path in order to bring out the subtle tone characteristics of a tube. For that reason the unit
does not incorporate a volume control. Due to the unit's extended
dynamic range no limiting occurs before signal levels exceed +30dBu at the line output.

This makes the PDI-CTC ideal for instruments such as bass, electro-acoustic and electric guitars (if a clean sound is what you're after), keyboards, synthesizers, et al.


Technical Specifications:

Active DI box with 4-band filtering, true tube circuit
Tube complement: 1x ECC83/12AX7, 1x ECC82/12AU7
Inputs: 1 x ¼“ jack socket, input impedance 1MΩ, max. level +4dBu
Outputs: 1 x ¼“ jack socket (PARALLEL OUTPUT)  |  1 x ¼“ lo-Z jack socket, +4 dB (BUFFERED OUTPUT), output impedance < 1kΩ  |  1 x XLR/m mic level, approx. gain +4 dB,  output impedance < 200Ω  |  transformer balanced w/ground lift switch (MIC OUT)  |  1 x XLR/m line level, approx. gain +24 dB, output impedance < 600Ω  |  transformer balanced w/ground lift switch, max. output level  |  before clipping +30dBu (LINE OUT)
  
XLR wiring: pin 1 = shield/ground, pin 2 = hot, in phase with the PALMER PDI-CTC | Active DI box with 4-band filtering, true tube circuit (Bild: Adam Hall)
input signal, pin 3 = cold, out of phase with the input signal
Passive 4-band RCL filters for bass, low mids, high mids, and
highs, bell shape, each switchable from linear (0dB) to +4dB, or +8dB  |  Integrated power supply, input voltages switchable from 100V - 240V  |  Average power consumption: approx. 10W, fuse: T3.15A
Dimensions: approx.  220mm W x 210mm D (235mm incl.
handles) x 88mm H (w/o rubber feet)

RSP PDI CTC:  699,00 €


More information 


Letzte Aktualisierung ( 09.11.2009 )