8000

HQ Passive Crossovers

ESB 8.6K3CX

A state-of-the-art project

 

Passive crossovers are used in 2-way or 3-way loudspeaker systems to electrically address low frequencies to the woofer and mid/high frequencies to midrange and tweeter. If a passive crossover has to work without compromise, it must be able to handle extreme dynamic variations, the full range of audio frequencies, complex speakers, and their varying impedance load. ESB 8000 passive crossover are carefully designed to do this and to interace the exact characteristics of the ESB 8000 speakers.

8.6K3CX

8.6K3CX

3-Way Passive Crossover

 

• Multi-amp or single amp connection

• Gold-plated parameter adjustment jumpers

• Air-wounded 99.9% pure copper coils  

• Anti-inductive resistors with dissipating aluminum body

• Very high quality bi-metallized capacitors

4 tweeter attenuation levels: 0; -2; -4; -6 dB

4 midrange attenuation levels: 0; -3; -6; -9 dB

2 different cutting slopes for the tweeter, 12 or 6 dB/oct.

3 different midrange high-pass frequencies

2 different cutting slopes for the midrange

4 levels for the woofer/midrange transition zone

8.6K3CX Data Sheet

8.6K3CX
8.6K3CX

Each crossover network circuit controls the signal to the high and low frequency speakers in order to maintain the linear acoustic response through the full audio spectrum. Naturally, such sophisticated engineering demands very close tolerances in production. 

 

Ordinary passive crossovers, for example, often use electrolytic capacitors with tolerances of +/- 20% and metal core on inductors. Response through the crossover region is ragged, and characteristics vary from unit to unit. The ESB 8000 passive crossover, on the other hand, use very high quality bi-metallized capacitors, individually tested to meet ESB tolerances,for maximum transparency of details in the medium and high frequencies. To increase the response speed the tweeter uses a configuration of lower value capacitors in parallel.

 

Anti-inductive resistors with dissipating aluminum body, helps to manage very high powers in order to remain relatively cool, in this way the resistance does not vary.

 

The special inductors used in ESB networks have extremely low insertion loss so that none of the driving power to the loudspeaker system is wasted in the network. To avoid interference between the inductors, these have been installed with a rotation of 90°, this arrangement cancels the interactions. 

 

Air-wounded 99.9% pure copper coils (with a large diameter of 1.5 mm) minimize distortion.

8.6K2CX

8.6K2CX

2-Way Passive Crossover

 

• Multi-amp or single amp connection

• Gold-plated parameter adjustment jumpers

• Air-wounded 99.9% pure copper coils  

• Anti-inductive resistors with dissipating aluminum body

• Very high quality bi-metallized capacitors

4 tweeter attenuation levels: 0; -2; -4; -6 dB

4 levels for the woofer/tweeter transition zone

8.6K2CX Data Sheet

Crossover Network Adjustments

 

The passive crossover have been designed to allow tonal adjustments to the woofer, midrange (only in the 8.6K3CX) and tweeter response, plus midrange (only in the 8.6K3CX) and tweeter level, with gold-plated removable jumpers. These adjustments make it possible to fine-tune your system to suit your listening preferences and to compensate different speaker mounting installation and orientation.

So, for example, you can minimize or emphasize the mid frequencies of the woofer, depending on its distance from the midrange or tweeter, and you can adjust the emission level of the tweeter and midrange (in the 3-way crossover), as well as the cutting slope.

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