Égaliseur à tubes EQ531T pour la série 500 - DIY Analog Pro Audio
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  • Égaliseur à tubes EQ531T pour la série 500 - DIY Analog Pro Audio
  • Égaliseur à tubes EQ531T pour la série 500 - DIY Analog Pro Audio

COMING SOON: EQ531T Tube Equalizer for 500 series

$489.00
$489.00 VAT incl.
$489.00 VAT excl.

The EQ531T is a 3 bands tube equalizer plus High pass filter, built around a dual triode, adapted to the 500 series of API*.

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EQ531T

Bootstrap Image Preview


The EQ531T is a 3 bands tube equalizer plus High pass filter, built around a dual triode, adapted to the 500 series of API*.

The tube, the midband inductor and the output transformer add a beautiful vintage colour to the EQ.

Just install it in your API* compatible LunchboxTM and start recording.



Highlights

    • The top and bottom bands are Baxandall shelving with 5 frequencies each,
    • The Midband is based on a multi-tap inductor, with 5 frequencies,
    • Each band and filter can be deactivated,
    • 12dB boost or cut in each band,
    • Low shelf frequencies: 60, 100, 180, 270 and 450 Hz,
    • Midband frequencies: 240, 500, 1k1, 2k3 and 5kHz,
    • High shelf frequencies: 2.5k, 4k, 6k, 9k and 12kHz,
    • High pass filter continuously variable from 15Hz to 400Hz,
    • Transformer balanced output,
    • Bypass by hardware relay,
    • Available assembled or as a full kit (everything included).

Bootstrap Image Preview

Controls

1: High frequency Sets the High shelf center frequency. 5 frequencies are available. The first position disables this band.

2: - dB + Sets the amount of cut or boost of the High shelf, up to 12dB.

3: Mid frequency Sets the Midband center frequency. 5 frequencies are available. The first position disables this band.

4: - dB + Sets the amount of cut or boost of the Midband, up to 12dB.

5: EQ IN Activates the EQ.

6: Low frequency Sets the Low shelf center frequency. 5 frequencies are available. The first position disables this band.

7: - dB + Sets the amount of cut or boost of the Low shelf, up to 12dB.

8: High pass frequency Sets the frequency of the High pass filter. Continuously variable from 15Hz to 400Hz.

9: HPF Activates the High Pass filter.



What's in the kit?

Absolutely everything!

  • Passive components (resistors, capacitors, inductors),
  • Output transformer
  • Tube
  • Active components (diodes, transistors, ...),
  • Front panel elements (switches, potentiometers, knobs),
  • Connectors, relay,
  • PCB's,
  • Front panel and side panels,
  • All hardware

You bring the solder (use good quality solder, 1mm diameter max) and the Lunchbox.


Difficulty level

The EQ531T kit is a medium difficulty build.

PK027

Specific References


Technical specifications

Measure Conditions Value
Iddle supply current No input signal I = +/- 165mA
Input impedance f=1kHz on XLR 22kΩ
Maximum input level on input XLR +27dBu
Maximum output level before clip on output XLR +28dBu


Frequency response

Frequency response graphs

Documentation


Sound Skulptor EQ531T

Reviews

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COMING SOON: EQ531T Tube Equalizer for 500 series

The EQ531T is a 3 bands tube equalizer plus High pass filter, built around a dual triode, adapted to the 500 series of API*.

Write your review