Dolby CS128MH – Mid/High Screen Channel Speaker
Dolby CS128MH – Mid/High Screen Channel Speaker is backordered and will ship as soon as it is back in stock.
Dolby CS128MH – Mid/High Screen Channel Speaker
What is the Dolby CS128MH?
The Dolby CS128MH is a passive mid/high screen channel speaker and the upper component of the Dolby System 128. It combines a custom 12-inch mid-frequency driver with a low-distortion 75 mm titanium dome high-frequency driver on Dolby's patented asymmetrical waveguide. Mounted on a CS128LF low-frequency cabinet, it forms a complete screen channel for medium-sized immersive auditoriums.
How does the Dolby CS128MH work?
A passive crossover inside the cabinet splits the signal between the 12-inch woofer and the titanium dome, so one amplifier channel drives the CS128MH. When it is paired with the CS128LF to form a System 128, the stack needs a minimum of two amplifier channels.
The asymmetrical waveguide covers 60° at the top and 120° at the bottom horizontally, with 60° vertical. Rear seats receive more direct energy while front rows get wider, softer coverage, which keeps dialog level consistent. The 12-inch driver uses a cooling-optimized motor and suspension plus an aluminum demodulation ring for lower distortion, and convective vents cool the HF driver and crossover.
Rated at 300 W @ 49 Vrms into 8 ohms with 101 dB sensitivity, the CS128MH covers 255 Hz to 20 kHz and reaches 126 dB continuous and 138 dB measured peak SPL at one metre. Typical system partners are the Dolby CP950A processor and a Dolby Multichannel Amplifier such as the DMA16302.
What are the key features of the Dolby CS128MH?
- Patented asymmetrical waveguide — 60° top / 120° bottom horizontal coverage evens out volume across the room.
- 75 mm titanium dome — a low-distortion HF driver delivers smooth, faithful response to 20 kHz.
- 12-inch MF driver — an aluminum demodulation ring and cooling-optimized motor cut distortion.
- Internal passive crossover — a single amplifier channel drives the cabinet.
- Tool-free input plate — high-current, spring-loaded terminals speed installation.
- Shallow 10.87-inch depth — the laterally mounted input plate eases access in tight spaces.
Where is the Dolby CS128MH typically used?
- Cinema auditorium (medium)
- Screening room
- Auditorium
- House of worship
Technical Specifications
| Model | CS128MH |
| Frequency range | 255 Hz - 20 kHz |
| Coverage window (asymmetrical) | 60° top H, 120° bottom H, 60° V |
| Rated impedance | 8 Ohms |
| Sensitivity @ 1 W | 101 dB |
| Power handling | 300 W @ 49 Vrms |
| Power draw | 300 W |
| Maximum voltage peak | 100 Vpk |
| Max continuous SPL @ 1 m | 126 dB |
| Measured peak SPL @ 1 m | 138 dB |
| Transducers | MF 12" woofer w/ demodulation ring; HF 75 mm titanium dome |
| Input | Advanced input plate w/ high-current spring-loaded terminal block |
| Enclosure | Wood |
| Accessories | Mounting yoke (included); BKT.FLR floor bracket kit (sold separately) |
| Dimensions (unit) | 26.32" H x 15.46" W x 10.87" D (66.85 x 39.3 x 27.61 cm) |
| Weight (unit) | 58 lb (26.3 kg) |
| Weight (shipping) | 61 lb (27.67 kg) |
Frequently Asked Questions
What does the CS128MH pair with?
It mounts on the Dolby CS128LF low-frequency cabinet to form the Dolby System 128 screen channel.
Is it compatible with Dolby Atmos processors?
Yes. It is part of Dolby's immersive screen speaker line and is driven from processors such as the CP950A or CP950 through external amplification.
Does the CS128MH need its own crossover?
No. A passive crossover is installed in the cabinet, so one amplifier channel drives it. The CS128LF takes at least one more channel.
How is it aimed?
The included mounting yoke carries a horizontal alignment decal for aiming the waveguide at the seating area.
What warranty and support are available?
The CS128MH carries Dolby's manufacturer warranty, confirmed with your quote. Creation Networks designs, installs and supports Dolby screen channels; see the Dolby Professional collection and request a quote.
At Creation Networks, we do everything we can to create an excellent customer experience. This includes fast shipping and easy returns.
- Most in-stock orders placed Monday-Friday ship within 24-48 hours. General restrictions apply; please see our full shipping policy here.
- We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.
Nationwide Audiovisual Services, Design, Installation & Support
Creation Networks is a trusted nationwide partner for complete audiovisual solutions — delivering expert AV system sales, professional design, programming, installation, and ongoing support to organizations across the United States.
From Microsoft Teams Rooms and enterprise video conferencing to LED video walls, live streaming production, and hybrid collaboration systems, we provide end-to-end AV integration using premium, certified technology from industry leaders including Crestron, Q-SYS, Shure, Extron, and Absen.
Whether you operate a single location or manage facilities nationwide, Creation Networks ensures your AV systems are designed for reliability, scalability, security, and long-term performance — helping your organization communicate more effectively and operate at peak efficiency.
CREATION NETWORKS — A PARTNER YOU CAN TRUST SINCE 2006
