My names is John Brodie, I am a Loudspeaker Engineer for QSC Audio and I designed the horns that you guys are using. Just thought I would say 'Cool Stuff' and make a few comments. First off, the primary role of our service parts store is for supporting QSC products, although we are aware that a few people are buying the parts for DIY. Provided that the numbers are small, buying a few parts shouldn't be a problem. Please be aware that we don't stock huge quantities of each part. QSC prides itself on being a good citizen within the audio world and "doing things right", but the amount of support we can give this kind of project is obviously limited (but I couldn't help chime in).
A few notes regarding the HPR horns and DIY in general:
- All of our components are designed for use in very specific products. We have the luxury of designing and selecting all of the components as a system. For instance, in the HPR series, we have precise control over the EQ, crossover and limiting on each driver's band. This systems approach yields great results, but the individual components might be harder to use for DIY than parts that are designed expressly for DIY use. It's a good idea to buy the SC-2150 crossover and matching drivers and horns. NONE of our crossovers are even close to 'off-the-shelf', they are all designed using lab measurements, good software and many hours of listening. Don't expect to drop in a stock catalog crossover and get good results.
- We buy drivers from several manufacturers, including Celestion. A few of these drivers are standard catalog parts, but most of them are designed by our in-house transducer experts. 100% of the drivers that we use are measured at the end of the production line and checked against rigorous standards.
- Buy some measurement equipment. Given the choice between 1000$ in parts and no measurement capability, or 200$ in parts and 800$ to spend on a microphone and analyzer (and books). The analyzer, combined with proper knowledge and skill will win every time (and be more fun). CLIO, Praxis etc. will all get you there with a little practice.
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