Passive Crossover Plan for B&C DCX-464 8ohm

Sale price Price $100.00 Regular price

By purchasing these plans you will receive the PDF electrical schematic crossover plan for the B&C DCX-464 8ohm version.  This crossover has been meticulously designed for the best sound quality for home HiFi applications.  The crossover was developed using the ES-290 Biradial Horn.  

Includes:

  • Plan in CAD funds 
  • Plans automatically emailed after purchase 
  • PDF file format 
  • Crossover developed after extensive listening tests 
  • Includes contour filters for flat frequency response 
  • 300Hz & 3.5kHz crossover points (2nd order) 
  • Includes LCR notch filter for Mid-Frequency peak at 4kHz 

Notes: 

1) This schematic retains most of the high sensitivity of the DCX-464-8 compression driver.  The resulting sensitivity is 108dB since some contour EQ is required to bring the response flat.  The raw sensitivity of this driver is 112dB.  

2) An L-pad circuit is required to pad the mid and high frequencies down to match the low frequency sensitivity.  The L-pad circuit should be positioned before the passive crossover. Alternatively you can bi-amp between the bass and mid/highs.  This enables low power tube amplification to be used on the mid/high portion because of the high sensitivity of the mid/high section.  

3) The electrical schematic shows a suggested low pass circuit for the low frequency bass cabinet.  The component values can be adjusted based on listening tastes.  

Description of crossover 

The high pass for the tweeter consists of two capacitors, one resistor, and one inductor.  The high pass uses a special contour network to extend the upper treble frequency response for a more 'airy' sound. 

The mid frequency sections consists of three capacitors, four inductors, and two resistors.   This section also includes a contour network to create a flat frequency response.  There is also a network to notch out a frequency response spike at 4.5kHz.  

The low pass network consists of one inductor and one capacitor.