BillFitzmaurice.info

Jakkle21, I sent you a private message on this forum, feel free to reach out to me if you like.

https://www.lowes.com/pd/15-32-CAT-PS1-09-Square-Structural-Plywood-Douglas-Fir-Application-as-4-x-8/1000105359 I have always bought this for my BFM speakers. In my area HomeDepot rarely carries 5ply wood. Lowes has always carried 5ply. Current price in my area is $27.15 for a 4x8ft sheet. This woo...

I have completed my high frequency upgrade. From a total of 8 Asd-1001 compression drivers to 16 f151m compression drivers for 8 otop12s. So far these plastic Chinese horns seem to be of sufficient quality. I am excited about this I can’t wait for an event where I can set everything up and let it rip!

there is an option to choose shipping method. See attached picture, the arrow shows where to select. I switched to the cheapest option and the shipping price comes to $112. This makes the total cost per unit $18.64 if 16 units is purchased.

https://billfitzmaurice.info/forum/viewtopic.php?p=284634#p284634 The pictures have gone missing, or I just do not know how to access them. People have started 3d printing horns for their speaker cabinet already. If I bought a machine that would be the first thing I would look at making! :hyper: I ...

ACUA, that's a butt load of data! Wow, thanks! Gonna take a couple days to take it all in before conversing about it all. So awesome! The Chinese horns look good, too bad there doesn't seem to be a domestic source for them. If the monthly volume of OTop plans sold was sufficient to make it a relati...

I'd consider personally buying a years worth and sell them through Amazon and/or ebay just to see how it goes. I'll order up when you do man.. I wish to express my opinion regarding the build quality of these plastic Chinese horns. The consistency of the 16 units I received is all good. Nothing was...

ACUA. good job! I'm a little surprised that you have response in the 20- 40Hz region, was there no HP on the mids? Also, since your 2 x HF drivers are wired in series, that allows twice the voltage swing, so you could get less of a lump in the 1-2K region with a less severe filter and the 1.2K cros...

If you want to see a specific chart configuration that I missed above let me know and I will post one up. My conclusion is that these Chinese plastic horns work fine. the ones I have do require dual loading to fit an otop12 cabinet. I like having dual drivers as it gives me head room and should have...

finally this post will show the spectrum analysis of the plastic Chinese horns I purchased, on axis off axis 45 degrees, then compare to the dual aluminum horn with f151m drivers and the asd-1001 drivers.

this round focuses on dual loaded f151m configuration, with on axis, 45degrees off axis and comparing single horn f151m and then dual asd-1001 on axis comparison.

I switched over to 1.2k filter crossover at 4th order butterworth, here is a single f151m horn driver, then comparing dual asd-1001 with it. again the gain structure between the high and mid is unchanged. I note that for proper phase alignment with the f151m drivers the normal phase polarity is corr...

here is the data I collected for dual loaded asd-1001 horns, on axis, 45 degrees off axis, comparing 1 asd-1001 vs 2 asd-1001 on and off axis.

Today I have collected a bunch of data and will attempt to present it. First I turned off all EQ and verified phase and spl at the 2k filter point. I noted that the ASD-1001 drivers were in phase with my phase reversed compared to the mids. I am running 4th order butterworth filters through my drive...

Yes sir, I will do that. Today I cut two pieces of wood and mounted up the dual horns in a cabinet. Perhaps tomorrow I will be able to set up and do some testing.