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The Contacta STS-K035 is an indoor window intercom system built around Contacta's distinctive STS-B94 half-bridge bar customer microphone. Instead of a stem microphone or an all-in-one puck, the B94 is a curved bar unit that mounts on the customer side of the counter with a low-profile base and an arcing microphone housing that wraps partially around the customer's speaking position. The curve is available with either a left or right orientation so the microphone geometry matches the customer's approach direction, and the whole kit ships in a coordinated Gray Leatherette or Black Textured finish so the staff unit and customer unit visually match once installed.
The complete kit includes a Contacta STS-B94 (left or right curve) half-bridge bar customer microphone with speaker, an STS-SU1-3W staff unit combining a cardioid microphone with dual-mute controls and a 5W speaker for the operator, an STS-A31H window intercom amplifier, an IL-AE99 under-counter hearing loop aerial (molded on site to the required size by your installer), and a PS-55 power supply.
Behind the scenes, the STS-B94 customer unit runs 5 W RMS into 4 ohms with 85 dB SPL output at 1 watt / 1 meter across a 150 Hz to 11,000 Hz speech range on the speaker side, and a cardioid microphone with an extended 70 Hz to 14,000 Hz frequency response that captures more of the customer's voice character than the standard 100 Hz to 10,000 Hz microphones used in Contacta's other indoor kits. The staff-side STS-SU1-3W matches the customer speaker on frequency response and a 5W output. The STS-A31H amplifier precision-drives both sides with less than 5 percent total harmonic distortion. The system is CE, RoHS, and WEEE compliant, and the hearing loop is certified to BS EN 60118-4 when installed correctly.
FAQS:
Q: What is the half-bridge bar customer microphone and why choose it?
A: The STS-B94 is a curved bar unit that mounts flat on the customer side of the counter with a low-profile base and an arcing microphone housing. Unlike a stem microphone that stands vertically, the bar shape sits close to the counter and wraps partially around the customer's speaking position, improving voice pickup at close range and giving the counter a cleaner, more architectural look than a taller stem or puck. Choose the K035 when you want an intercom that reads as counter furniture rather than a separate audio component.
Q: How do I pick between Left Hand and Right Hand curve?
A: The B94's curve is directional; it wraps around the customer from one side or the other. Pick the orientation that matches how the customer approaches your counter and which side of the counter the intercom sits relative to the customer's dominant speaking position. If your counter has fixed seating on the staff side and a walk-up window on the customer side, the curve typically opens toward the customer's approach path so the microphone stays close to their mouth without them having to reposition. If you're not sure which orientation your install needs, call us at 800-207-2259 and we'll help you spec it.
Q: How is this different from the STS-K002 or K003 counter-mount kits?
A: The K002 uses a surface-mounted flat plate customer unit, and the K003 uses a flush-mounted plate; both mount the customer speaker and microphone as a low-profile plate at the counter surface. The K035 uses the STS-B94 half-bridge bar, which is a curved above-counter unit with a distinctive architectural profile. Choose the K035 when you want the curved bar aesthetic and a slightly wider microphone frequency response (70 Hz to 14 kHz on the customer side).
Q: How does the hearing loop work?
A: The included IL-AE99 aerial is a copper-wire loop with PVC casing that mounts under the counter. The installer molds it to the required size on site, then connects it to the intercom amplifier. Once installed correctly, it meets BS EN 60118-4, the international standard for hearing loop performance, and broadcasts intercom audio directly to T-coil-equipped hearing aids in the immediate area.
Q: Does the finish just affect appearance?
A: Yes. Gray Leatherette and Black Textured are both durable powder-coated finishes on mild steel metalwork; the difference is purely visual. Gray Leatherette gives the units a lighter, softer look that blends into typical office or teller environments; Black Textured gives a more contemporary or upmarket appearance. Both the staff unit and customer unit come in the finish you select so they visually match once installed.
Q: How many components come in the kit?
A: The complete set includes the STS-A31H amplifier, STS-SU1-3W staff speaker and microphone unit with dual mute, STS-B94 half-bridge bar customer speaker and microphone (in your chosen left or right curve), IL-AE99 under-counter hearing loop aerial, and PS-55 power supply.
Q: Is installation complicated?
A: The electronics are plug-and-play, but the customer unit needs to be permanently positioned on the counter; the hearing loop aerial has to be routed and molded under the counter, and cabling has to be run between the staff and customer sides. Plan for a professional installer if you're not comfortable running low-voltage cable through service counters or shaping copper-wire loop aerials.
Features:
Applications:
The STS-K035 is designed for indoor service windows and counters where the buyer wants a curved counter-mount customer microphone with a coordinated finish. Ideal for:
Technical Specifications:
System Components:
STS-A31H Window Intercom Amplifier
STS-SU1-3W Staff Unit Speaker & Microphone (Dual Mute)
STS-B94 (LH or RH) Half-Bridge Bar Customer Speaker and Microphone
IL-AE99 Under-Counter Hearing Loop Aerial
PS-55 Power Supply
The Contacta STS-K035 is an indoor window intercom system built around Contacta's distinctive STS-B94 half-bridge bar customer microphone. Instead of a stem microphone or an all-in-one puck, the B94 is a curved bar unit that mounts on the customer side of the counter with a low-profile base and an arcing microphone housing that wraps partially around the customer's speaking position. The curve is available with either a left or right orientation so the microphone geometry matches the customer's approach direction, and the whole kit ships in a coordinated Gray Leatherette or Black Textured finish so the staff unit and customer unit visually match once installed.
The complete kit includes a Contacta STS-B94 (left or right curve) half-bridge bar customer microphone with speaker, an STS-SU1-3W staff unit combining a cardioid microphone with dual-mute controls and a 5W speaker for the operator, an STS-A31H window intercom amplifier, an IL-AE99 under-counter hearing loop aerial (molded on site to the required size by your installer), and a PS-55 power supply.
Behind the scenes, the STS-B94 customer unit runs 5 W RMS into 4 ohms with 85 dB SPL output at 1 watt / 1 meter across a 150 Hz to 11,000 Hz speech range on the speaker side, and a cardioid microphone with an extended 70 Hz to 14,000 Hz frequency response that captures more of the customer's voice character than the standard 100 Hz to 10,000 Hz microphones used in Contacta's other indoor kits. The staff-side STS-SU1-3W matches the customer speaker on frequency response and a 5W output. The STS-A31H amplifier precision-drives both sides with less than 5 percent total harmonic distortion. The system is CE, RoHS, and WEEE compliant, and the hearing loop is certified to BS EN 60118-4 when installed correctly.
FAQS:
Q: What is the half-bridge bar customer microphone and why choose it?
A: The STS-B94 is a curved bar unit that mounts flat on the customer side of the counter with a low-profile base and an arcing microphone housing. Unlike a stem microphone that stands vertically, the bar shape sits close to the counter and wraps partially around the customer's speaking position, improving voice pickup at close range and giving the counter a cleaner, more architectural look than a taller stem or puck. Choose the K035 when you want an intercom that reads as counter furniture rather than a separate audio component.
Q: How do I pick between Left Hand and Right Hand curve?
A: The B94's curve is directional; it wraps around the customer from one side or the other. Pick the orientation that matches how the customer approaches your counter and which side of the counter the intercom sits relative to the customer's dominant speaking position. If your counter has fixed seating on the staff side and a walk-up window on the customer side, the curve typically opens toward the customer's approach path so the microphone stays close to their mouth without them having to reposition. If you're not sure which orientation your install needs, call us at 800-207-2259 and we'll help you spec it.
Q: How is this different from the STS-K002 or K003 counter-mount kits?
A: The K002 uses a surface-mounted flat plate customer unit, and the K003 uses a flush-mounted plate; both mount the customer speaker and microphone as a low-profile plate at the counter surface. The K035 uses the STS-B94 half-bridge bar, which is a curved above-counter unit with a distinctive architectural profile. Choose the K035 when you want the curved bar aesthetic and a slightly wider microphone frequency response (70 Hz to 14 kHz on the customer side).
Q: How does the hearing loop work?
A: The included IL-AE99 aerial is a copper-wire loop with PVC casing that mounts under the counter. The installer molds it to the required size on site, then connects it to the intercom amplifier. Once installed correctly, it meets BS EN 60118-4, the international standard for hearing loop performance, and broadcasts intercom audio directly to T-coil-equipped hearing aids in the immediate area.
Q: Does the finish just affect appearance?
A: Yes. Gray Leatherette and Black Textured are both durable powder-coated finishes on mild steel metalwork; the difference is purely visual. Gray Leatherette gives the units a lighter, softer look that blends into typical office or teller environments; Black Textured gives a more contemporary or upmarket appearance. Both the staff unit and customer unit come in the finish you select so they visually match once installed.
Q: How many components come in the kit?
A: The complete set includes the STS-A31H amplifier, STS-SU1-3W staff speaker and microphone unit with dual mute, STS-B94 half-bridge bar customer speaker and microphone (in your chosen left or right curve), IL-AE99 under-counter hearing loop aerial, and PS-55 power supply.
Q: Is installation complicated?
A: The electronics are plug-and-play, but the customer unit needs to be permanently positioned on the counter; the hearing loop aerial has to be routed and molded under the counter, and cabling has to be run between the staff and customer sides. Plan for a professional installer if you're not comfortable running low-voltage cable through service counters or shaping copper-wire loop aerials.
Features:
Applications:
The STS-K035 is designed for indoor service windows and counters where the buyer wants a curved counter-mount customer microphone with a coordinated finish. Ideal for:
Technical Specifications:
System Components:
STS-A31H Window Intercom Amplifier
STS-SU1-3W Staff Unit Speaker & Microphone (Dual Mute)
STS-B94 (LH or RH) Half-Bridge Bar Customer Speaker and Microphone
IL-AE99 Under-Counter Hearing Loop Aerial
PS-55 Power Supply
