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- Purifi white paper shows that a series notch can decrease breakup . . .
Quite interesting after cursory reading They have an alu cone with a 5 kHz breakup and decrease distortion by adding a series notch that has about 45 Ohms impedance at 1650 Hz Seems this higher driver impedance decreases motor distortion, so it is not at all about the mode coupling into the motor and getting short-circuited
- Revisiting the M8ta. . . - HTGuide Forum
OK, I was just being a little coy yesterday, anyone familiar with recent driver data or tests will recognize the PuriFi PTT8 0x04 woofer SPL plot, and of course the tweeter SPL is my own measurements of the Peerless DA25TX00-008
- Purifi class-D amplifiers - HTGuide Forum
The sound with just the input buffer of the Neurochrome adapter board is a bit laid back and less dynamic than with the Neurochrome Universal Buffer, but still with an edge over the Purifi FE02 board in the EVAL1 kit in clarity
- Looking for a DAC under $1500 - HTGuide Forum
Hi I am looking for recommendations to complete my new system I need a Dac new or used under $1500 Preamp is a used vac cla-1 mk3, amp is vtv purifi stero amp, speakers are EFE t22 mtm design The inputs seem to be xlr or rca for the dac I mainly listen to streaming music out of convenience (amazon) but open to there
- Saint-Saëns planar- AKA SMJ-40- time for a project now?
Hmmm, looks like we'll need to do a comprehensive data sheet review At the same time, I started looking at AMT style drivers for the tweeters, and was hearing things about B G planers being taken over by GRS But also I was impressed by the half dozen PuriFi cone midranges I'd bought as samples, initially just for the Isiris update project
- 2021-2023 Isiris Update - HTGuide Forum
The main breakup modes are at 5kHz and 10kHz, and can be surpressed with notch filters (even as described in PuriFi application note) at 5kHz (series, last circuit to support distortion reduction) and a parallel notch filter for the 10kHz mode
- Dhars Joseph Crowe Waveguide panel two way with TW29BN-B PTT6. 5W04
One of our members, Dhar, shared with me a project he's being working on for a friend- it's a build using a Joseph Crowe designed front baffle for the SB and PuriFi drivers, with a waveguide for the tweeter milled into the front panel Joseph Crowe sells a 3D CAD file for the baffle drawing, and then the buyer can either
- Driver Evaluations for a new project - HTGuide Forum
Erin's review is interesting- it confirms my impression that the 4" PuriFi's are a bit of an odd duck, yet quite high performance in some characteristics For a 4 ohm driver of this type, the sensitivity is rather low, and the suspension nonlinearity disappointing, as well as the SPL linearity in the 1-3kHz area
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