Hill Audio SPB8420 Low Impedance Speaker Patch Box

Hill Audio SPB8420  Low Impedance Speaker Patch Box
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NZ $129.00
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Inline Low Impedance Speaker Patch Box For Installations


Many installed sound systems work with 4, 8 or a maximum of 16 speakers, and serve relatively limited areas of up to 300sqm, with the main target of music replay. Typical installations of this nature encompass retail shops, restaurants and bars. While contractors tend to choose 100V line systems for such applications, such choice increases the cost and decreases the efficiency and specifically the sound quality of a sound system, since expensive transformers with limited audio bandwidth and high saturation losses are inserted in the signal path. Transformer-based systems are thus more suitable for the coverage of larger areas or paging-related purposes. With the only remaining viable reason for a transformer-based system being used in smaller venues with music replay being the ease of installation, Hill Audio offers a solution with the SPB-8420. This low impedance speaker installation patch box takes away the hassle of determining the correct combination of parallel and series wiring, and also solves the problem of wire impedance load balancing by keeping the wire lengths, cross-sections and impedances the same for every connected speaker. The SPB-8420 is designed for the use with 8 Ohm speakers. The necessary configuration can be selected via 3 top-panel switches, and can be set between a stereo mode with either 2×2 or 2×4 speakers, or a mono mode with 8 speakers. For 16-speaker installations, the use of two units is required. The SPB-8420 is intended to be placed in the center of the speaker arrangement, with cables running from the driving amplifier into the input binding posts. Speakers are connected via 5.08mm Phoenix-style connectors, with the necessary plugs supplied with the unit. The unit is passive, requires no power supply and sports a mounting system for simple mounting on walls or ceilings. The SPB-8420 is the perfect solution for contractors who are determined to provide the best sound for an attractive cost by moving into low-impedance systems, while maintaining the ease of installation. It combines perfectly with Hill Audio’s IMA/IPA line of amplifiers and the ADAGIO line of passive speakers..
  • Low Impedance Speaker Patch Box
  • 2x Binding post inputs for 2.5 sqmm cables from a 4-Ohm capable amplifier output
  • 8x 5.08mm speaker outputs on Phoenix-style terminals
  • Designed for 8-Ohm speakers
  • Output configuration settable by 3 slide switches: Configuration A: 2×2 speakers, load impedance 2×4Ω | Configuration B: 2×4 speakers, load impedance 2×8Ω | Configuration C: 1×8 speakers, load impedance 1×4Ω
  • Terminal plugs for outputs supplied with unit
  • No power supply required
  • Simple wall or ceiling mounting
  • Full metal case
  • CE/ROHS compliant
  • Max. Power Handling: 2x100W or 1x200W
  • Speaker Impedance: 8 Ohms
  • Dimensions: L175xH25xD95mm
  • Weight: 0.6 kg
EMC/Safety Compliance:
  • EU safety: EN 60065:2001 +A1
  • EU EMC: EN55103-1:1997, EN55103-2: 1997
  • US safety: UL60065
  • US EMC: FCC Part 15
This product meets both the EMC Directive 2004/108/EC and the Low Voltage Directive 2006/95/EC.
Environmental Compliance:
  • This product is manufactured in accordance with EG directive 2002/95/EG of the European Union on the restriction of the use of certain hazardous substances in electrical and electronic equipment (RoHS).
  • This product does not contain more than 0.1% of weight of the SVHCs listed in annex XIV of the REACH regulation EC 1907/2006.

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