are you planning to cross really low, or just try different XO points too see what works well with the woofer?
Group Buy status 3-4-2020
Major milestone, we have confirmation group’s payment of just under $10kUSD has arrived in Purifi’s bank account this securing our place in the production queue. In response to my query about delivery time the answer was:
So, ~10 weeks we are looking at mid-May to early June to land transducers in USA and distribute to group. With this group buy entering the hurry up and wait phase I will post these updates only if news is received from Purifi. I will query them about the critical path magnet supply situation until magnets are in Denmark.
Reviewing our progress the following nine steps for the process were posted January 17th when I announced the GB. We have completed steps 1 to 5 and combined steps 3, 7, and 8.
Done 1. Recruit enough participants to qualify for quantity 8+ pricing.
Done 2. Close participation in initial group buy.
Done 3. Check costs to buy woofers (and passive radiators if anyone orders those) and shipping costs Denmark to Oklahoma, communicate each individual’s total to participants. (Amended to include participants’ 2nd leg shipping costs.)
Done 4. Participants pay using PayPal to group buy organizer. Your PayPal receipt will state “Expected delivery time 6 – 8 weeks”, I will try to beat that, most of that will be determined by Purifi’s build time and shipping including clearing USA customs.
Done 5. When all funds arrive order is placed with Purifi. Be aware Purifi states “Note that this product is made-to-order. Expect approximately 4 weeks delivery time.” (Amended since January 2019 Purifi’s build time estimate increased to ~10 weeks.)
6. While Purifi builds and ship woofers group organizer will prepare boxes and packing for shipping leg within North America.
Done, combined with step 3 7. When shipment arrives in Oklahoma group organizer will break down into shipments to individual participants, determine cost, and communicate to each participant their North American final leg shipping cost.
Done, combined with step 3 8. After participant pays their individual within N. America cost group organizer ships their order.
9. Woofers arrive individual participants’ workshops where they are installed in boxes. Jaws drop, sonic bliss ensues.
Major milestone, we have confirmation group’s payment of just under $10kUSD has arrived in Purifi’s bank account this securing our place in the production queue. In response to my query about delivery time the answer was:
Currently it looks like we should be able ship in ~10 weeks (if not a slight bit sooner) if the sub supplier deliver as expected. However, until the magnet shipment is secure at our facility I dare not make guarantees given the spreading COVID-19 situation. I’ll keep you informed.
So, ~10 weeks we are looking at mid-May to early June to land transducers in USA and distribute to group. With this group buy entering the hurry up and wait phase I will post these updates only if news is received from Purifi. I will query them about the critical path magnet supply situation until magnets are in Denmark.
Reviewing our progress the following nine steps for the process were posted January 17th when I announced the GB. We have completed steps 1 to 5 and combined steps 3, 7, and 8.
Done 1. Recruit enough participants to qualify for quantity 8+ pricing.
Done 2. Close participation in initial group buy.
Done 3. Check costs to buy woofers (and passive radiators if anyone orders those) and shipping costs Denmark to Oklahoma, communicate each individual’s total to participants. (Amended to include participants’ 2nd leg shipping costs.)
Done 4. Participants pay using PayPal to group buy organizer. Your PayPal receipt will state “Expected delivery time 6 – 8 weeks”, I will try to beat that, most of that will be determined by Purifi’s build time and shipping including clearing USA customs.
Done 5. When all funds arrive order is placed with Purifi. Be aware Purifi states “Note that this product is made-to-order. Expect approximately 4 weeks delivery time.” (Amended since January 2019 Purifi’s build time estimate increased to ~10 weeks.)
6. While Purifi builds and ship woofers group organizer will prepare boxes and packing for shipping leg within North America.
Done, combined with step 3 7. When shipment arrives in Oklahoma group organizer will break down into shipments to individual participants, determine cost, and communicate to each participant their North American final leg shipping cost.
Done, combined with step 3 8. After participant pays their individual within N. America cost group organizer ships their order.
9. Woofers arrive individual participants’ workshops where they are installed in boxes. Jaws drop, sonic bliss ensues.
I'm fairly new to this and trying to still get my head around design options using Jeff Bagby's Woofer Box Model and Circuit Designer.
I would appreciate some help on what would happen if using the SPK5 port design but with the volume increased from 15l to 20l to accomodate the crossover within the cabinet rather than externally.
Group Buy status 3-19-2020
Wow, the unexpected twists and turns of life. My last update was just 15 days ago and COVID-19 was something only effecting PROC and getting electronics from suppliers based there. Now efforts worldwide focus on a pandemic unprecedented in any of our lives. I very much hope that as a first priority you, your family, friends, and work team are healthy and taking best known precautions as the pandemic progresses. In my home Oklahoma USA we have ~60 confirmed cases of C19 out of a population of 4 million. My employer, an industrial electronics manufacturer, remains open unlike churches, theaters, restaurants, bars, gyms, and casinos. I am thankful thus far no one I know has contracted COVID-19 and I can help keep the economy running at the present sadly reduced pace.
Regarding our group order today I shared emails with Purifi and the report is most Purifi staff are working from home but arrangements are in place to keep production running with selected people working at Purifi’s lab/factory. Thus everything is ready when the last parts arrive. Good news is parts shipment is on track and expected to arrive at Purifi first week of April. This will include enough magnets to cover our order.
The above of course assuming Denmark does not declare a country wide lock down as in Italy. I will check back early April to confirm parts arrived as scheduled and the production line remains in operation.
Group buy member racingpht reported yesterday the GB delivery to Canada has a new twist for those who receive packages in USA. Another example of new complexities we face. We will overcome these. We must not just for our passion for HiFi music reproduction but to prime the economies of the world that have provided us the means to pursue such luxuries.
Wow, the unexpected twists and turns of life. My last update was just 15 days ago and COVID-19 was something only effecting PROC and getting electronics from suppliers based there. Now efforts worldwide focus on a pandemic unprecedented in any of our lives. I very much hope that as a first priority you, your family, friends, and work team are healthy and taking best known precautions as the pandemic progresses. In my home Oklahoma USA we have ~60 confirmed cases of C19 out of a population of 4 million. My employer, an industrial electronics manufacturer, remains open unlike churches, theaters, restaurants, bars, gyms, and casinos. I am thankful thus far no one I know has contracted COVID-19 and I can help keep the economy running at the present sadly reduced pace.
Regarding our group order today I shared emails with Purifi and the report is most Purifi staff are working from home but arrangements are in place to keep production running with selected people working at Purifi’s lab/factory. Thus everything is ready when the last parts arrive. Good news is parts shipment is on track and expected to arrive at Purifi first week of April. This will include enough magnets to cover our order.
The above of course assuming Denmark does not declare a country wide lock down as in Italy. I will check back early April to confirm parts arrived as scheduled and the production line remains in operation.
Group buy member racingpht reported yesterday the GB delivery to Canada has a new twist for those who receive packages in USA. Another example of new complexities we face. We will overcome these. We must not just for our passion for HiFi music reproduction but to prime the economies of the world that have provided us the means to pursue such luxuries.
Got my woofers. No materials to build a box 
Build thread is here:
Exploring Purifi Woofer Speaker Builds
Build thread is here:
Exploring Purifi Woofer Speaker Builds
Group Buy status 4-14-2020
I hope you are all well as we learn to cope while the pandemic runs its course.
For the North American Purifi transducers Group Buy members I have good news. Purifi reports all components have arrived at their factory/lab and the woofers and PRs for our order are expected to ship end of this week or next. We should temper our expectations in that they also report shipping is taking longer, hardly a surprise given how the pandemic has affected capacity of the global shipping systems.
I will post next update when Denmark to USA shipment of our order is confirmed.
I hope you are all well as we learn to cope while the pandemic runs its course.
For the North American Purifi transducers Group Buy members I have good news. Purifi reports all components have arrived at their factory/lab and the woofers and PRs for our order are expected to ship end of this week or next. We should temper our expectations in that they also report shipping is taking longer, hardly a surprise given how the pandemic has affected capacity of the global shipping systems.
I will post next update when Denmark to USA shipment of our order is confirmed.