Our take
Canon's imageCLASS LBP6780dn is a monochrome network printer for offices that need high rated output without a copier or scanner. Canon's U.S. support page identifies the exact model and lists up to 42 pages per minute for single-sided Letter jobs and 20.5 pages per minute for duplex output. Automatic two-sided printing is standard. The page also documents USB and Gigabit Ethernet, so the dn configuration can be connected directly or placed on a wired office network. The candidate clue 6469B006AA is associated with this exact model. Canon's support page gives a maximum duty-cycle figure but no comparable recommended monthly range; that normal-volume guidance remains unknown in the profile. Wireless is not listed as a standard feature in the reviewed specification. Do not convert a maximum duty cycle into a recommended volume. This print-only role works where an existing MFP handles incoming paper, but it is insufficient if staff need copies or scans at the printer. On any older listing, verify the LBP6780dn label, network and duplex operation, available drivers, toner and drum condition, print count if available, and return terms. The affiliate destination is a tagged exact-model search, not an ASIN-verified offer.
A wired office wanting fast black-and-white network printing and automatic two-sided output without MFP functions..
Choose another device if you need color, copying, scanning, fax, built-in Wi-Fi, or a manufacturer-published recommended monthly page range.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- Canon rates simplex output up to 42 ppm and duplex output up to 20.5 ppm on Letter.
- Automatic duplex, Gigabit Ethernet, and USB are documented for the exact model.
- The dn identity provides a wired-network role without relying on optional wireless hardware.
What to weigh up
- The LBP6780dn is print-only and cannot copy or scan documents.
- Wireless capability is not established by the reviewed exact-model U.S. source.
- Canon does not provide a comparable recommended monthly workload in the reviewed specification.
The key details
| Model covered | LBP6780dn |
|---|---|
| Main functions | Monochrome print only |
| Print output | Up to 42 ppm simplex; 20.5 ppm duplex |
| Two-sided printing | Automatic duplex; Gigabit Ethernet and USB |
Performance figures are manufacturer claims. Source checked October 5, 2026. Regional models and included accessories can differ.
What the features mean for you
A printer for a wired output queue
Canon's U.S. support page describes the LBP6780dn as a black-and-white laser printer. The model name and suffix are important: the dn version is the network-oriented configuration in the candidate. Canon lists Gigabit Ethernet and USB, making it suitable for an office network or a direct workstation. It does not include copy or scan functions. If an office needs to digitize signed pages or duplicate originals, retain a separate all-in-one rather than expecting this print engine to handle paper intake.
Rated simplex and duplex speeds
Canon gives separate Letter ratings: up to 42 pages per minute for one-sided output and 20.5 pages per minute for duplex jobs. The figures allow a useful comparison with printers whose two-sided speed is lower, but they are manufacturer ratings, not a guarantee for complex files or a specific aging unit. Automatic duplex can reduce manual handling for long reports and internal handouts. If a used printer is being considered, request both a single-sided text sample and a duplex sample to check alignment, feed, and image quality.
Keep the missing workload number missing
Canon's exact U.S. support page lists a maximum duty-cycle value but does not provide a comparable recommended monthly page range. A maximum describes an upper operating limit under specified conditions, not the routine level Canon recommends for long-term use. This review therefore leaves both monthly endpoints unknown. The printer's high rated speed is also not a substitute for monthly guidance. If a procurement rule requires an explicit recommendation, compare another model with a published range rather than inferring one from speed or duty cycle.
Check the network and optional-feature assumptions
Canon lists Gigabit Ethernet and USB for the LBP6780dn. The reviewed page does not establish built-in wireless networking, so a wireless-required choice should not include the model on the strength of a generic listing. Verify the rear-panel ports and exact nameplate, especially where used and refurbished inventory may combine family accessories or descriptions. A network port is useful only if the office can support the printer's drivers, firmware, and security posture; legacy hardware may need a more careful compatibility check than a current device.
Paper path, maintenance, and the separate MFP
The LBP6780dn is best assessed as a dedicated print engine. Check the paper trays, rollers, duplex path, internal condition, supplies, and service history. Canon's page can establish what the model was designed to do, but it cannot confirm the state or included toner of an individual listing. If the printer is going into a shared location, make sure a separate copier or scanner is available and that its workflow is acceptable. Ask about return coverage and test network printing from the intended computers before relying on it.
Match the output needs before buying older hardware
For an office seeking fast mono output, automatic duplex, and Ethernet, the LBP6780dn has a specific and well-documented profile. It is less complete than an MFP, and the absence of a recommended monthly range limits workload comparison. A Lexmark E260dn offers a lower speed rating but a documented 250–2,500 page recommendation. The HP P2055d adds a 750–3,000 range but is not the same Ethernet-equipped dn configuration. Choose Canon when throughput and wired networking matter most, while checking supplies, drivers, and exact unit condition.
What else to compare
For Ethernet with a known 250–2,500 page recommendation, compare the Lexmark E260dn. For copy, scan, fax, and duplex document handling, compare the Xerox WorkCentre 3550.
Before you buy
What is the LBP6780dn's rated duplex speed?
Canon lists up to 20.5 pages per minute for two-sided Letter output on the exact model.
Does the LBP6780dn have Ethernet?
Yes. Canon's U.S. support page lists Gigabit Ethernet and USB connectivity.
Does it copy or scan?
No. Canon documents the LBP6780dn as a print-only model.
What monthly volume does Canon recommend?
The reviewed Canon U.S. page does not provide a comparable recommended monthly range.
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.
- Canon U.S. imageCLASS LBP6780dn specifications ↗ — checked October 5, 2026.
- Canon U.S. LBP6780dn exact model, speed, duplex, standard ports, and duty-cycle data ↗ — checked October 5, 2026.
The decision
The LBP6780dn suits a wired mono queue where speed and automatic duplex matter more than MFP features. Its recommended monthly range remains unknown, so do not use duty cycle as a substitute.
Is it the right fit?
Check the exact model and today’s offers on Amazon.