Please title this page. (cxr32.htm in tabnet)

Clearview CXR 32 crossover.

The CXR 32 is a 3 way, 2 channel (stereo) equalising crossover. This crossover is available as a standard of-the-shelf item with equalization built in for planar magnetic drivers or as a customized crossover with optimized correction curves for your 2 way + sub or 3 way system. In the latter situation measurement data or detailed design data needs to be available.

Topology:

Subwoofer or woofer section:

Defeatable second order highpass (HP2) or fourth order highpass with Linkwitz-Riley alignment. Third order alignment is possible as is any custom phase topology (Butterworth, Bessel, Linear Phase, Legendre, etc. Allows for electronically assisted vented woofer/subwoofer applications. (6th order alignment.)
Continuously adjustable Q for the high pass filter.
Low pass filter with first, second, third or fourth order alignment, any phase topology.
Linkwitz "bass correction" or pole shifter. Allows to shift Fc and Qtc of the sealed enclosure (only) lower to the desired design parameters. Allows for electronically assisted sealed woofer/subwoofer applications. Capable of extending the bass one octave and more down in function of the driver's T/S parameters
Level control on the output.
Single ended or balanced input
Single ended or balanced output

Woofer or mid/bass section:

High pass filter with first, second, third or fourth order alignment, any phase topology.
Continuously adjustable Q for the high pass filter.
Low pass filter with first, second, third or fourth order alignment, any phase topology
Linkwitz pole shifter. Allows to shift Fc and Qtc of the sealed enclosure lower to the desired design parameters. Capable of extending and flattening the response of the driver at the resonance point before crossing over.
Adjustable electronic delay section for time alignment of the driver.
Level control on the output
Single ended or balanced input
Single ended or balanced output

Planar or tweeter section.

High pass filter with first, second, third or fourth order alignment, any phase topology.
Continuously adjustable Q for the high pass filter
Two independent notch filters with bandpass EQ section. Gain and Q adjustable by design. Ideal for EQ of planar drivers, point source cone break-up or tweeter resonance suppression
Adjustable electronic delay section for time alignment of the driver
Level control of the output
Single ended or balanced input
Single ended or balanced output.

All unused sections can be jumpered out throughout the design. Once the design is finished for a product, a consolidated PC board layout can be produced with only those sections that are relevant for the particular product.

No use is made of SK, VCS, biquad or State Variable filters. Instead classic LCR filters with FDNR's are used for maximum transparency and minimal component tolerance dependency. The inductors are replaced by gyrators in the highpass filters and D elements in the lowpass filters.

Power supply is a two stage regulated, dual tracking design with low noise and high line regulation.

Components

Resistors are metalfilm, 1%, 50 ppm/degree C. On request 0.1%, 25 ppm Holco resistors can be substituted..
All capacitors are polystyrene or polypropylene, 2% tolerance. Matched to 0.5 % on request.
All rotary controls are conductive plastic for low noise and smooth operation. Stepped attenuators on request.
Decoupling capacitors are film, monolithic ceramic and tantallum.
Operational amplifiers are AD797, OP176 and OP275. On request we'll substitute with your "favorite".

Power supply transformer (115-230 VAC) is toroidal for lowest magnetic leakage. Rectifier is equipped with bypassed high speed soft recovery diodes. Buffer capacitors are Nichicon, low ESR. External power supply is possible on request.

Enclosure

The frontpanel is 3/8" solid black anodize aluminum with countersunk alu knobs for the rotary controls. Sides and rear are high tech alu extrusions. Top and bottom are vinyl loaded, black paint over black anodize alu panels
Custom color schemes and silkscreens possible for production units.

Ordering and info:

Audio-X-Stream
Rudi Blondia