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Model:QM-86HY
Release time:2026-09-11
Nature:Manufacturer
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The visual area is 30% larger than 75 inches, so that the students in the back row will no longer squint. It is specially designed for 45-60 large-size classrooms, amphitheatre classrooms and report halls: 4-7 m golden sight distance, 450cd/m high brightness, 10 people writing and cooperating.
Large classrooms buy the wrong size, wasting the budget and losing the attention of the students in the back row. First measure the depth of the classroom, count the number of permanent residents, and then compare the recommended matrix-the best applicable area of 86 inches, which has been marked with golden stars.
| Classroom depth ↓/Number of people → | 15-20 people | 20-30 people | 30–45 people | 45-60 people | 60-80 people |
|---|---|---|---|---|---|
| Within 3 meters | 55 inches | 65 inches | overcrowded | overcrowded | overcrowded |
| 3-4 meters | 65 inches | 65 inches | 75 inches | overcrowded | overcrowded |
| 4-5 m | 65 inches | 65 inches | 75 inches | 86 inch | overcrowded |
| 5-6 m | Slightly small | 75 inches | 75 inches | ★86 inch | 98 inch |
| 6-7 m | Slightly small | Slightly small | 86 inch | ★86 inch | 98 inch |
| More than 7 meters | Slightly small | Slightly small | Slightly small | 98 inch | 98 inch |
This section covers large amphitheatre, lecture hall and university lecture hall -86 inches is the minimum feasible size for these spaces to achieve "no dead corners in the back row. Less than 86 inches, the back row is "can't see clearly". If you are not sure, send the classroom floor plan to the QtenBoard engineer to help you calculate the sight distance and produce the installation point bitmap free of charge.
In classrooms with 45-60 people, the last row is often more than 5 meters away from the screen. Projection can't see clearly, 75 inches is not enough, 86 inches is the size line that every student can "see clearly.
75 inches can comfortably accommodate 8 people to write together, 86 inches can comfortably accommodate 10 people to write together-this is exactly the necessary configuration for 45-60 class to do "large-scale classroom interaction.
The 86-inch unit price is higher, the decision is more prudent, and the roles involved are more. We write down the concerns and QtenBoard responses of each type of role clearly so that you can take them to internal reporting.
The lecture hall is the "facade" of the school, and the display effect of parents' meeting, open day, open class and graduation ceremony directly represents the image of the school.
86-inch town can live in a venue-when the big screen opens, the sense of professionalism is full. "Face Project"? This face, worth it.
The unit price is higher, can you replace it with 75 inches or projection? How about budget approval?
The 75-inch classroom with 60 people is a "small horse-drawn cart", and the projection is completely unavailable in a bright environment. Spend 20% more now to avoid regretting buying again after 3 years-this is saving money, not spending money.
86 inches weighs about 50kg, installation, maintenance, follow-up operation and maintenance are workload.
Is it difficult to install? Leave it to the QtenBoard: wall evaluation, reinforcement and debugging are done in one stop, supporting remote operation and maintenance. You only need to sign and accept.
How to interact with the 60-person class? How to ensure the participation of students in the back row?
The 4-split screen shows 4 groups of homework at the same time, 10 people writing and cooperating with each other-a large class of 60 people, and can also give a sense of interaction in small classes.
Installation is often the biggest hidden concern in purchasing decisions for large equipment. QtenBoard the installation is disassembled into four links, all of which are rounded.
The following is the real use feedback of QtenBoard 86-inch interactive whiteboard in large space, focusing on the specific pain points of classes with more than 45-60 people.
"In the past, with projection, the students in the back row basically relied on 'listening' and could not see the screen. After changing the QtenBoard 86 inches, the students in the last row could also see the annotation details of the engineering drawings. What surprised me most was the 4-split screen-the work of 4 groups was displayed at the same time, which doubled the efficiency of comparison and evaluation."
"Every year, the lecture hall will hold parents' meeting, open class and graduation ceremony. In the past, projection was used, and the light was white as soon as it was strong. It was changed to 86 inches, 450cd/m high brightness, and it could be seen clearly without drawing the curtains in broad daylight. Several parents asked 'how much is this? '-the school's face came up at once."
"The lecturer should show the PPT, the practical operation code and the student question area at the same time, and the 86-inch 4-split screen can be used for multiple purposes without switching back and forth. Ten students can also take the stage at the same time, and large-scale training can also ensure participation-which is impossible in small size."
In 2026, QtenBoard reached an order for 150 interactive tablets (65-86 inches) with Dutch national distributors, covering the local education market, and authorized it as a Dutch national distributor.
3000 schools across the country have chosen to QtenBoard interactive whiteboards, covering lecture halls, lecture halls, smart classrooms and large training spaces.
Each 86-inch set must undergo aging test and reliability test before leaving the factory: long-term lighting, touch fatigue, high and low temperature cycle to ensure batch delivery "ready for use".
Case caliber description: the teacher/director/director case comes from the on-the-spot feedback of QtenBoard education users, showing the usage scenario and functional effect; Data such as factory scale and Dutch channel cooperation are quoted from the public information of QtenBoard official website (qtenboard.com).
The whole series of the same platform design, easy to unified procurement, unified operation and maintenance. The comparison table directly shows the uniqueness of 86 inches in a large space, and the matching up/down speech technique helps you persuade internally.
| Comparison dimension | 55 inches | 65 inches | 75 inches | 86 inches (recommended) | 98 inch |
|---|---|---|---|---|---|
| Number of applicable students | 15-20 people | 20-30 people | 30–45 people | 45-60 people | 60-80 people |
| Classroom Depth | 1.5-4 m | 2-5 m | 3-6 m | 4-7 m | 5-8 m |
| Visible area (based on 55 inches) | 1x | 1.4x | 1.7x | 2.2x | 2.8x |
| Brightness | 400cd/m² | 400cd/m² | 400-450cd/m² | 450cd/m² | 500cd/m² |
| Audio power | 2 × 15W | 2 × 15W | 2 × 15W | 2 × 20W | 2 × 20W |
| Price Positioning | Entry Level | Mainstream level | Standard class | High-end level | Flagship |
| Typical Scene | Counselling Room/Early Education | small class classroom | Standard K-12 | Large classroom/lecture hall | Large auditorium |
If the classroom depth exceeds 5 meters or there are more than 45 students, 75 inches is "barely enough" and 86 inches is "really enough": invest about 20% more budget, get 30% more visual area and 50cd/m higher brightness, in exchange for the experience of "no longer squinting" for the students in the back row.
If the classroom does not exceed 60 people and the depth does not exceed 7 meters, 86 inches is the best cost-effective solution: 40% of the budget spent on 98 inches is "over-allocated" in the classroom with 45-60 people, and the installation difficulty, transportation cost and wall requirements are greatly increased.
Send the length and width of the classroom, the height of the floor and the number of permanent residents to the QtenBoard engineer, and provide a free selection of sight distance points. It doesn't matter if you don't buy it.
Each column of parameters corresponds to a usage scenario: brightness to natural light, touch to number of collaborators, and sound to classroom area. The difference from 75 inches has been marked.
| Parameter item | 86 inches typical | Highlights of the difference with 75 inches |
|---|---|---|
| Screen size | 86 inches | 11 inches |
| Resolution | 3840 × 2160(4K UHD) | — |
| Brightness | 450 cd/m² | ↑ Higher, larger classroom clearer |
| Contrast | 5000:1 | ↑ Dark content is sharper |
| Touch Points | 40-100 points | Support 10 people to write together |
| Touch Delay | 6-26ms | Writing fluently with hands |
| Visual Angle | 178°/178° | The corners on both sides of the amphitheatre are visible |
| Overall dimensions | About 1960 × 1150 × 80mm | — |
| Overall weight | About 45-50kg | Professional installation required. |
| Speaker | 2 x 20W stereo | ↑ More power, covering a large space |
| Installation method | Professional wall mount/floor stand | Walls to be evaluated |
| System | Android 14 / Windows OPS 可选 | Google EDLA certification optional |
| Interface | Hdmi×3 、 USB-C × 1 、 USB 3.0 × 2 、 RJ45 × 1 、 Wi-Fi 6 、 BT 5.3 | ↑ HDMI more than 1 channel, support more devices |
| Power consumption | Approximately 220W (standby <0.5W) | Power saving than two 65-inch |
| Life | 50000 hours | — |
Less layer of middlemen, more quality and customization capabilities. The following scale and channel data are from the public information of QtenBoard official website.
Institutions bidding, regional distribution, integrator projects: can cooperate to provide parameter certification, authorization documents and sample testing. Bulk purchase and OEM customization requirements, direct contact to obtain factory quotation.
By the QtenBoard product and engineering team to answer one by one, focusing on 86-inch unique doubts and bulk procurement caliber.
Suitable for depth of 4-7 meters, 45-60 large-scale classrooms, amphitheatre, lecture hall. When the depth exceeds 5 meters, 86 inches is the "bottom line configuration"-even smaller, the back row cannot be seen clearly.
We provide free door-to-door wall assessment services. Professional engineers test the bearing capacity of the wall and give reinforcement schemes if necessary. If the load-bearing standard is not up to standard, it will not be installed hard, and the evaluation will be passed before installation.
The visual area increased by about 30%, the brightness increased from 400-450cd/m to 450cd/m, the sound increased from 2 × 15W to 2 × 20W, and the HDMI interface increased from 2 to 3. Each is a "large space" just need to upgrade.
Professional logistics team distribution, delivery upstairs (including stairs/elevator handling scheme). The 86-inch package size is about 2100 × 1300 × 300mm, which can be entered by standard freight elevators.
Built-in 2 × 20W speakers, classrooms with less than 60 people do not need to be externally connected; When the classroom has more than 60 people or has higher requirements for sound quality, it is recommended to use external sound (reserve audio output interface).
Support. With USB camera and microphone can realize remote interactive classroom; equipment supports mainstream video conference and teaching platform.
Standard 3-year machine warranty; bulk purchase can be extended to 5 years. The use verification of 3000 schools in the country, coupled with the guarantee of original spare parts, does not worry about after sales.
Support horizontal and vertical screen switching, suitable for displaying vertical content (documents, codes, music scores). It is very practical to display posters and agendas on the vertical screen in the large report hall.
Yes. College projects, regional distribution and integrator projects are quoted according to quantity and scheme, and bidding documents (parameter table, authorization letter and sample test) are supported. The more quantity, the more complete the scheme, the exclusive ladder price.
Sure. Brand Logo, startup animation, pre-installed App, UI interface and structural parts can be customized according to the project. OEM/ODM/CKD/SKD cooperation and localized assembly are supported to adapt to the global market.
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