Call Us: 800-207-2259
The Contacta STS-K021 is a glass-mounted window intercom system built for indoor service counters where the customer side has security glass with a pre-cut communication hole. What sets the K021 apart from Contacta's other glass-mount kits is the STS-BL0 customer unit, a single Silver Sparkle-finished puck that combines the speaker and microphone into one all-in-one component mounted through the glass. That simplifies the install to a single customer-side hole and a single mounting kit, and it gives the finished counter a cleaner visual profile than kits with a separate overhead speaker and stem microphone. It's the right pick for indoor bank teller windows, credit union cash counters, transit fare booths, information desks, box office ticket windows, and government service counters where a permanent glass-mount install is planned, and the buyer wants everything integrated into one customer-facing unit.
The complete kit includes a Contacta STS-BL0 all-in-one glass-mounted customer speaker and microphone puck with the mounting kit, an STS-SU1-3W-SIL-400 Silver Sparkle finished staff unit with a 15.75-inch gooseneck microphone stem and a 5W speaker for the operator, an STS-A31H-BL8 window intercom amplifier, an IL-AE98 window-mounted hearing loop aerial for T-coil hearing aid users, and a PS-55 power supply.
Behind the scenes, the STS-BL0 customer unit runs 5 W RMS into 4 ohms with 85 dB SPL output at 1 watt / 1 meter across a 150 Hz to 10,300 Hz speech-tuned range on the speaker side, and an omnidirectional cardioid-style microphone with a 100 Hz to 10,000 Hz response tuned to pick up the customer's voice from any angle at the puck. The staff-side STS-SU1-3W speaker matches the customer-side speaker specs, so both sides of the conversation have the same audio character. The STS-A31H-BL8 amplifier precision-drives both sides with less than 5 percent total harmonic distortion. The full system is CE, RoHS, and WEEE compliant; the amplifier meets FCC Class B EMC emissions and ICES-003.
Note that the STS-K021 is not ballistic-rated. If your installation requires a bullet-resistant customer unit, Contacta manufactures the STS-K022 (Ballistic Level 3) and STS-K023 (Ballistic Level 8) as direct successors to the K021 with the same install pattern and ballistic-rated hardware. Call us at 800-207-2259 if you need help picking the right kit for your barrier type.
FAQS:
Q: What kind of installation is this kit designed for?
A: The STS-K021 is designed for indoor service windows where the security glass or acrylic partition has a pre-cut communication hole and the buyer wants a single customer-side unit that handles both speaker and microphone. The STS-BL0 puck mounts directly on the glass. Typical installs are bank teller windows, credit union counters, transit fare booths, ticket windows, government service counters, information desks, and pharmacy consultation counters.
Q: How is this different from the STS-K020-S23 glass-mount kit?
A: The K020-S23 uses two separate customer-side components: an STS-S23 overhead speaker mounted above the window and an STS-C100 stem microphone mounted at the counter. The K021 uses one integrated STS-BL0 puck that combines the speaker and microphone into a single unit at the glass. Choose the K021 for a simpler single-unit install and cleaner visual profile. Choose the K020-S23 when you want the speaker overhead and the microphone at counter level for better acoustic separation.
Q: Is the STS-K021 ballistic-rated?
A: No, the STS-K021 is a non-ballistic-rated indoor kit. Contacta offers the same platform with ballistic-rated hardware in two variants: the STS-K022 with Ballistic Level 3 rating and the STS-K023 with Ballistic Level 8 rating. Call us at 800-207-2259 if you need help selecting the right ballistic level to match your glass supplier's rating.
Q: How does the hearing loop work?
A: The included IL-AE98 aerial is a thin 8.5" x 8.5" panel that mounts on the window and broadcasts the intercom audio directly into T-coil-equipped hearing aids in the immediate area, giving hearing-aid users a clean signal without ambient noise.
Q: How many components come in the kit?
A: The complete set includes the STS-A31H-BL8 window intercom amplifier, STS-SU1-3W-SIL-400 Silver Sparkle staff speaker and microphone unit, STS-BL0 all-in-one customer-side speaker and microphone puck with glass mounting kit, IL-AE98 window-mounted hearing loop aerial, and PS-55 power supply.
Q: Is installation complicated?
A: The electronics are plug-and-play, but the STS-BL0 puck mounts permanently through a hole in the glass, and the amplifier and staff unit need to be positioned inside the operator's workstation. Plan for a professional installer if you're not comfortable working with security glass hardware or running low-voltage cable through a service counter.
Features:
Applications:
The STS-K021 is designed for indoor service windows with communication holes cut through the glass where a single integrated customer-side unit is preferred over separate speaker and microphone components. Ideal for:
Technical Specifications:
System Components:
STS-A31H-BL8 Window Intercom Amplifier
STS-SU1-3W-SIL-400 Staff Unit Speaker & Microphone (Silver Sparkle, Gooseneck)
STS-BL0 All-in-One Customer-Side Speaker and Microphone with Glass Mounting Kit
IL-AE98 Window-Mounted Hearing Loop Aerial
PS-55 Power Supply
The Contacta STS-K021 is a glass-mounted window intercom system built for indoor service counters where the customer side has security glass with a pre-cut communication hole. What sets the K021 apart from Contacta's other glass-mount kits is the STS-BL0 customer unit, a single Silver Sparkle-finished puck that combines the speaker and microphone into one all-in-one component mounted through the glass. That simplifies the install to a single customer-side hole and a single mounting kit, and it gives the finished counter a cleaner visual profile than kits with a separate overhead speaker and stem microphone. It's the right pick for indoor bank teller windows, credit union cash counters, transit fare booths, information desks, box office ticket windows, and government service counters where a permanent glass-mount install is planned, and the buyer wants everything integrated into one customer-facing unit.
The complete kit includes a Contacta STS-BL0 all-in-one glass-mounted customer speaker and microphone puck with the mounting kit, an STS-SU1-3W-SIL-400 Silver Sparkle finished staff unit with a 15.75-inch gooseneck microphone stem and a 5W speaker for the operator, an STS-A31H-BL8 window intercom amplifier, an IL-AE98 window-mounted hearing loop aerial for T-coil hearing aid users, and a PS-55 power supply.
Behind the scenes, the STS-BL0 customer unit runs 5 W RMS into 4 ohms with 85 dB SPL output at 1 watt / 1 meter across a 150 Hz to 10,300 Hz speech-tuned range on the speaker side, and an omnidirectional cardioid-style microphone with a 100 Hz to 10,000 Hz response tuned to pick up the customer's voice from any angle at the puck. The staff-side STS-SU1-3W speaker matches the customer-side speaker specs, so both sides of the conversation have the same audio character. The STS-A31H-BL8 amplifier precision-drives both sides with less than 5 percent total harmonic distortion. The full system is CE, RoHS, and WEEE compliant; the amplifier meets FCC Class B EMC emissions and ICES-003.
Note that the STS-K021 is not ballistic-rated. If your installation requires a bullet-resistant customer unit, Contacta manufactures the STS-K022 (Ballistic Level 3) and STS-K023 (Ballistic Level 8) as direct successors to the K021 with the same install pattern and ballistic-rated hardware. Call us at 800-207-2259 if you need help picking the right kit for your barrier type.
FAQS:
Q: What kind of installation is this kit designed for?
A: The STS-K021 is designed for indoor service windows where the security glass or acrylic partition has a pre-cut communication hole and the buyer wants a single customer-side unit that handles both speaker and microphone. The STS-BL0 puck mounts directly on the glass. Typical installs are bank teller windows, credit union counters, transit fare booths, ticket windows, government service counters, information desks, and pharmacy consultation counters.
Q: How is this different from the STS-K020-S23 glass-mount kit?
A: The K020-S23 uses two separate customer-side components: an STS-S23 overhead speaker mounted above the window and an STS-C100 stem microphone mounted at the counter. The K021 uses one integrated STS-BL0 puck that combines the speaker and microphone into a single unit at the glass. Choose the K021 for a simpler single-unit install and cleaner visual profile. Choose the K020-S23 when you want the speaker overhead and the microphone at counter level for better acoustic separation.
Q: Is the STS-K021 ballistic-rated?
A: No, the STS-K021 is a non-ballistic-rated indoor kit. Contacta offers the same platform with ballistic-rated hardware in two variants: the STS-K022 with Ballistic Level 3 rating and the STS-K023 with Ballistic Level 8 rating. Call us at 800-207-2259 if you need help selecting the right ballistic level to match your glass supplier's rating.
Q: How does the hearing loop work?
A: The included IL-AE98 aerial is a thin 8.5" x 8.5" panel that mounts on the window and broadcasts the intercom audio directly into T-coil-equipped hearing aids in the immediate area, giving hearing-aid users a clean signal without ambient noise.
Q: How many components come in the kit?
A: The complete set includes the STS-A31H-BL8 window intercom amplifier, STS-SU1-3W-SIL-400 Silver Sparkle staff speaker and microphone unit, STS-BL0 all-in-one customer-side speaker and microphone puck with glass mounting kit, IL-AE98 window-mounted hearing loop aerial, and PS-55 power supply.
Q: Is installation complicated?
A: The electronics are plug-and-play, but the STS-BL0 puck mounts permanently through a hole in the glass, and the amplifier and staff unit need to be positioned inside the operator's workstation. Plan for a professional installer if you're not comfortable working with security glass hardware or running low-voltage cable through a service counter.
Features:
Applications:
The STS-K021 is designed for indoor service windows with communication holes cut through the glass where a single integrated customer-side unit is preferred over separate speaker and microphone components. Ideal for:
Technical Specifications:
System Components:
STS-A31H-BL8 Window Intercom Amplifier
STS-SU1-3W-SIL-400 Staff Unit Speaker & Microphone (Silver Sparkle, Gooseneck)
STS-BL0 All-in-One Customer-Side Speaker and Microphone with Glass Mounting Kit
IL-AE98 Window-Mounted Hearing Loop Aerial
PS-55 Power Supply
