Our take
Keep the SP870 on a shortlist only when a legacy presentation system, its long throw, and its documented source inputs fit the room. BenQ's manual does not establish an ANSI rating, so do not use the row's historical lumen claim to satisfy a brightness requirement.
A legacy presentation room with known throw distance and compatible wired sources.
It is not a match for native Full HD or 4K, an ANSI-lumen must-have, ultra-short-throw placement, or a room built around streaming apps and current HDMI devices.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- BenQ's manual confirms native XGA and a traditional 4:3 presentation format.
- The source panel includes DVI-D, VGA, S-video, composite, and component video.
- A model-specific projection table helps check whether the room can provide several metres of clearance.
What to weigh up
- BenQ's accessible manual does not state an ANSI-lumen rating for this model.
- The XGA panel has less native detail than WUXGA or Full HD projectors.
- A 360 W lamp and older connections call for careful condition and adapter checks.
The key details
| Model covered | SP870 |
|---|---|
| Image format | XGA 1024 × 768 native, 4:3 image |
| Rated light output | ANSI light output not stated in BenQ's accessible manual |
| Placement | Conventional long throw; 120-inch 4:3 image averages about 4.42 m |
Performance figures are manufacturer claims. Source checked October 9, 2026. Regional models and included accessories can differ.
What the features mean for you
Is a 4:3 XGA image compatible with the content?
BenQ identifies the SP870's native panel as XGA 1024 × 768, a 4:3 image format. That can suit older slides, spreadsheets, and installed office systems that were designed around a squarer picture. Modern widescreen video and detailed desktop text make the resolution tradeoff more visible, especially as the image grows. A source may deliver a signal in another format, but that does not raise the panel's native pixel count. Decide first whether the room's presentation material and screen proportions match XGA; if the answer is no, a higher-resolution projector should take priority over the SP870's legacy connectors.
What do the inputs mean for a legacy room?
The user manual documents D-sub RGB, DVI-D, S-video, composite, and component connections, along with stereo speakers. This gives the SP870 a place in a presentation chain that still uses VGA or older video equipment. It does not provide a documented built-in streaming platform, so modern content would need a compatible external source and any required adapters. Before purchasing, compare the source device's output with the projector's actual ports and verify that adapters preserve the needed resolution and signal. A seller's broad projector-family description is not enough; inspect the SP870 label and connector panel on the unit being considered.
Can the room provide the required throw?
BenQ's manual includes a projection-distance table rather than presenting the SP870 as a short-throw product. For a 120-inch 4:3 image, the listed average distance is about 4416 mm. That is several metres of clearance and should be checked against the actual lens-to-screen position, image size, mount, and any obstruction. The guide does not establish optical lens shift, so do not rely on digital correction or a nearby model's features to make a poorly aligned installation fit. Measure the room before choosing a shelf or ceiling mount, and confirm that the available image size is realistic for the projector's placement.
Why is the output rating left unknown?
The exact BenQ manual identifies a 360 W lamp and up to 510 W maximum consumption, but the accessible specification does not give an ANSI-lumen rating. A historical listing's “5000 Lumen” wording cannot fill that gap, because it lacks a documented measurement method and does not establish the projector's current output. That distinction matters when brightness is a required filter: the profile should not compare this model as though its output were measured on the same basis as an ANSI-rated projector. A used lamp also has its own age and condition. Inspect the image and obtain lamp-hour information instead of assuming the original specification describes today's unit.
Who should compare a newer presentation model?
The SP870 is most relevant when an existing system already expects its 4:3 image and legacy wired sources. Epson PowerLite 2250U takes a different path with native WUXGA 1920 × 1200, two HDMI inputs, and color and white output measured under separate IDMS and ISO methods; those figures are not ANSI either, but the resolution and digital inputs are more current. Choose the BenQ if its installed chain and throw are the reason it fits. Choose a different model when pixel detail, a known ANSI output, or simple HDMI compatibility decides the purchase. The evidence supports these fit differences, not a performance ranking.
What else to compare
Epson PowerLite 2250U supplies native WUXGA and two HDMI inputs with separate IDMS/ISO light-output figures; InFocus IN36 keeps an XGA presentation role but has a documented 3000-ANSI-lumen rating and its own legacy input layout.
Before you buy
Does the BenQ SP870 have a documented ANSI-lumen rating?
The accessible BenQ manual does not state one, so the ANSI output remains unknown in this comparison.
What distance does a 120-inch image need?
BenQ's manual lists an average of about 4416 mm for a 120-inch 4:3 picture; verify the exact setup dimensions.
Does the SP870 have HDMI or streaming apps?
The manual lists DVI-D and VGA plus older video inputs, but no HDMI or integrated streaming platform.
Where can I check the current price?
Use the Amazon link for current offers. Check the exact model, seller, product condition, delivery, and return terms. This page does not display a live price or confirm stock.
Sources & review basis
We use the following manufacturer documentation for the product features above. Our suitability notes and buying advice are editorial judgments based on those features, not measured performance results.
- BenQ SP870 support and user manual ↗ — checked October 9, 2026.
- BenQ SP870 support and downloads ↗ — checked October 9, 2026.
- BenQ SP870 official user manual ↗ — checked October 9, 2026.
The decision
The SP870 is a legacy presentation option only when its XGA format, long throw, and installed source connections are all confirmed.
Is it the right fit?
Check the exact model and today’s offers on Amazon.