Popular Post Normal Man Posted January 21, 2020 Popular Post Share Posted January 21, 2020 Mitch Barnett’s review here on Audiophile Style along with the technical measurements confirmed by HiFiCompass has led me to become an early adopter of the Purifi PTT6.5W04-01A woofer. If you are also interested in being among the first to own this breakthrough speaker technology join us for a North American group buy I am organizing on diyaudio.com for Purifi’s PTT6.5W04-01A woofer, and optionally the matching PTT6.5PR-01A Passive Radiator. Owing to Purifi’s policy requiring orders go to a single address this gets complex, thus the long post with details and minutia here: https://www.diyaudio.com/forums/group-buys/348234-purifi-ptt6-5w04-01a-woofer-buy.html There I also post links and description of Purifi and their PTT6.5W04-01A woofer. Rather than repeat that allow me to describe why I have shoe horned in with my other projects to explore the PTT6.5W04-01A (for discussion let’s shorten that to PTT6.5W). First is the distinguished individuals who have formed Purifi with deep chops on both the science + technology and business side of Hi-Fi. Second a believable explanation of how going back to first principles the team reduced distortion by tens of dBs and allowed low distortion operation at extreme excursions. Third independent measurement and listening tests report Pirifi has achieved the stated goals. Fourth it uses a paper + fibers cone, I like paper cones and the simple crossovers they often allow. Fifth is a thermal and mechanical design that reliably withstands exploring the limits of the driver. Purifi publicly states one can keep pouring on the power until the driver bangs against its stops (at somewhere beyond +-14 mm excursions!) and the driver is fine, just turn it down a bit. In my view this capability is especially valuable given the T/S parameters are set for vented enclosures so below ~30Hz the driver will be unloaded from the enclosure’s air mass. Of course all vented designs share that trait, it’s just that low distortion and air moving promises of the PTT6.5W will invite operation at high levels. A new paragraph for my sixth reason as I feel most strongly about it. I have a passion for enabling those of us in the middle class to own Hi-Fi approaching the performance of statement level rigs. Carefully selected solutions along with some sweat equity and for a few thousands we have sound approaching the hundred thousand dollar rigs. The PTT6.5W has that potential all over it so I am in. Given it is designed for use in ½ cubic foot (15 liter) enclosures one can get it up and running with a simple flat pack box from Parts Express and the Purifi application note. From there you are only limited by your imagination. I intend to share as an open source project PTT6.5W designs using different tweeters and enclosure options. If I have peaked your curiosity to hear these as an early adopter click the link and check it out. mitchco and ShawnC 1 1 Link to comment
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now