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Greater Toronto Area DIY meetup
Greater Toronto Area DIY meetup
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Old 8th January 2019, 03:13 PM   #951
BigE is offline BigE  Canada
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Join Date: Aug 2008
Location: Toronto
Where?
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Old 8th January 2019, 04:08 PM   #952
ticknpop is offline ticknpop  Canada
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Join Date: May 2005
Location: toronto
Greater Toronto Area DIY meetup
Sunday, March 31st 10 am onwards
The usual location, usual suspects

Last edited by ticknpop; 8th January 2019 at 04:35 PM.
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Old 9th January 2019, 02:14 AM   #953
kawihornet is offline kawihornet  Canada
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Join Date: Mar 2015
Location: Cambridge, Ontario, Canada
Hey guys i'm in the KW area and would really love to have someone apprentice me. Someone who has a ton of experience building DIY amplifiers and electronics and show me the ropes. I'm even willing to sweep the floor lol. Let me know if this would be of interest to you.
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Old 9th January 2019, 02:48 AM   #954
ticknpop is offline ticknpop  Canada
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Join Date: May 2005
Location: toronto
Greater Toronto Area DIY meetup
If you show up at the DIY meet you’ll meet a few of the inmates, see who is working on things your interested in and make friends, drink beer, eat snacks , tell lies about women, etc etc (repeat as required).

Theres nothing a Diyaudio guy likes more than some one who’ll listen to him go on and on about nothing important.................

Last edited by ticknpop; 9th January 2019 at 02:56 AM.
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Old 9th January 2019, 03:44 AM   #955
ticknpop is offline ticknpop  Canada
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Join Date: May 2005
Location: toronto
Greater Toronto Area DIY meetup
Because I was too lazy to bring them home theres a pair of JL audio 12 inch subs that will be there - 3db @21hz and 1.5kw each.
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Old 9th January 2019, 05:17 AM   #956
anatech is offline anatech  Canada
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Join Date: Jun 2004
Location: Georgetown, On
Greater Toronto Area DIY meetup
How efficient are they Dave?

Hi kawihornet,
I'm in Georgetown and plan to catch this event. Depending on how things work out, you could drop by and catch a ride with me and possibly a friend who I hope also comes again. I live very close to highway #7 and Trafalgar Road. So if you took 7 out here it would be a natural stop for you. Then we would drop down to the 401 and hope that no one has had an accident. It should be a fun trip otherwise.

-Chris
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Old 9th January 2019, 08:05 AM   #957
ticknpop is offline ticknpop  Canada
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Join Date: May 2005
Location: toronto
Greater Toronto Area DIY meetup
How efficient?
The JBL 4 ways are 4 ohm and about 100db @ 1 watt. They would probably sound better biamped or triamped, but the idea was to be able to power them with a single amp so they could be used to demo the diy amplifiers .They have a high quality passive crossover - all polypropelene caps, mid and tweeters use MIT film and foil caps and air core coils.

The subs are self powered adjustable line level input.
I am adding a set of splitter RCA cables to feed power amps and the subs from the preamp.
The subs can be used/not used as whoever is demonstrating prefers.
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Last edited by ticknpop; 9th January 2019 at 08:12 AM.
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Old 9th January 2019, 04:06 PM   #958
anatech is offline anatech  Canada
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Join Date: Jun 2004
Location: Georgetown, On
Greater Toronto Area DIY meetup
Hi Dave,
That actually sounds very interesting. Your horns are more efficient aren't they?

One question for you. What kind of speaker leads will we need. I use barrier strips, so I'll need to bring a spade connector to ? to interface with your wiring?

I'm really looking forward to this get together.

-Chris
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Old 9th January 2019, 05:28 PM   #959
ticknpop is offline ticknpop  Canada
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Join Date: May 2005
Location: toronto
Greater Toronto Area DIY meetup
The system is 1970’s JBL drivers and an updated version of their 4350 studio monitor crossover
The 2 x 18 bass and JBL 2202 12” low mid are 100 db /1watt
The JBL 2441 driver and 2395 midrange horn is 116 db/1watt and has to be used with an Lpad to match the low end drivers.
JBL 2405 tweeter is 105 db / 1 watt and also has an Lpad to set level.
So the low end sets the overall level and efficiency at about 100 db / 1watt

The new leads for the speakers are about 6 feet longer and have several plugin options that are very easy to change to suit whatever amps are brought in. Locking bananas, spade lugs, and bare wire ends all are available.

Last edited by ticknpop; 9th January 2019 at 05:36 PM.
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Old 10th January 2019, 04:26 AM   #960
anatech is offline anatech  Canada
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Join Date: Jun 2004
Location: Georgetown, On
Greater Toronto Area DIY meetup
Hi Dave,
Excellent! I'll bring some leads just in case. My spades are designed for #6 screws I think, maybe #4. I'll have to check.

-Chris
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