Altec Dc1317 Parts Manual - What You Need to Know
The Altec DC1317 is a compression driver that was produced as part of Altec Lansing's professional audio lineup. Getting your hands on a proper parts manual for it can be frustrating because the documentation landscape around vintage Altec equipment is messy. Most of the original paperwork was released decades ago, and a lot of it lives in scanned PDFs hosted on random enthusiast sites that may or may not have accurate information. Your best starting point for the Altec Dc1317 Parts Manual is the Altec Lansing archive maintained by various audio restoration communities. There are a few mirror sites and enthusiast forums where people have re-uploaded scanned copies of the original service bulletins. I tend to check the Altec Lansing Information Archive and the AudioKarma forums when I need these documents. Sometimes you also find them on Scribd or similar document-sharing platforms, though the quality varies a lot. If you can't find a direct download, the alternate approach is to look up the related service manuals for the enclosures or systems the DC1317 was commonly installed in. It was used in several Altec horn-loaded systems, and the driver details often appear as sections within those larger manuals. The parts listings there are usually accurate enough to cross-reference.
What the Manual Covers
A proper parts manual for this driver will typically include an exploded view diagram showing all the individual components, a parts list with Altec part numbers, and sometimes basic specifications like impedance, power handling, and frequency response. For the DC1317 specifically, you want to be looking at the diaphragm assembly, voice coil, magnet structure, and the connection between the driver and the horn throat. The useful detail most people miss is that Altec part numbers on these drivers were sometimes revised during production runs. A parts manual from one year might list a component differently than one from another year. I ran into this exact problem when sourcing a replacement diaphragm retainer for a DC1317 I was restoring. The manual I had on file listed part number 288-8A, but the driver I was working on had a slightly different serial range and actually needed 288-8B. I confirmed the correct part by checking the casting marks on the existing retainer and comparing it against photos from the Altec Lansing data sheets that documented the production changeover. It saved me from ordering the wrong part and waiting weeks for a return.
Common Pitfalls When Working With This Equipment
The most important thing to understand about these drivers is that genuine Altec replacement parts are essentially unavailable through normal channels. Altec Lansing as it existed in the vintage era no longer operates that way, and the remaining authorized parts distributors mostly carry reproduction components or parts salvaged from NOS inventory. When a parts manual lists a specific diaphragm or voice coil assembly, finding it new is often impossible. You end up relying on third-party reproduction manufacturers or refurbishing original components. Another counter-intuitive issue is the assumption that parts manuals for Altec drivers are fully interchangeable across model variations. They are not. The DC1317 shares some components with adjacent models in the DC series, but critical parts like the diaphragm geometry, magnet gap spacing, and throat adapter dimensions can differ in ways that matter. Using a parts manual from a different but similar-looking driver and assuming compatibility is how people end up with drivers that sound wrong or fail prematurely. Always verify the part numbers against your specific driver's serial range before ordering anything. The parts manual itself has limitations too. It won't tell you about recommended torque values for the mounting hardware, proper adhesive application procedures for diaphragm replacement, or alignment tolerances for the voice coil gap. Those details usually exist in separate service bulletins or have to be learned through hands-on experience. If you're doing a full rebuild, plan on supplementing the parts manual with additional technical references from the same era.
Get the Full Details
Practical Advice
Before you pull a DC1317 apart, photograph every step. The reassembly sequence for these compression drivers is not intuitive if you've never done it, and you will forget which gasket goes where. Take your time with the diaphragm installation. The critical tolerance is the voice coil gap centering. If it's off even slightly, you will get rubbing and distortion that the parts manual cannot help you diagnose because it only shows static assembly, not dynamic alignment. For sourcing parts, the reproduction market is dominated by a handful of manufacturers who make diaphragms and voice coils to Altec specs. They are generally acceptable for most applications, though they will not match the exact materials of the original components. If you need original-spec restoration, you are looking at NOS parts or having components custom-machined, which significantly increases both cost and lead time. Download links for the manual circulate on the same enthusiast forums and archive sites mentioned earlier. Search for the Altec Lansing Information Archive or reach out to members of the AudioKarma Altec section, since individual collectors often have scanned copies they are willing to share. The documentation community around this equipment is small but functional, and most people will point you in the right direction if you ask politely and provide your specific driver serial number.
