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Author Topic: Build the FFRSMark 4:20i. plans/parts here!  (Read 91227 times)
Tablet Man
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« Reply #225 on: November 03, 2017, 09:31:11 AM »

Ahhh good shout Ed cheers
Good job I've not wired em yet, I'll hold off a few days
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Tablet Man
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« Reply #226 on: November 07, 2017, 06:22:08 AM »

Im struggling to find 600 ohm 1/2 watt resistors over here, anyone have a link to some?
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Ed Schilling
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« Reply #227 on: November 07, 2017, 05:02:30 PM »

Hey buddy, don't obsess! 560- 700 should be fine. Also, don't forget you can make the value ........ parallel halves the value and series adds them. Use any combination of parallel and series to get what you want! 2- 1.2 K in parallel will get you 600 for instance. Or 2- 1.0k in parallel gets you 500 and then a 100 in series with that gets you 600. 

You can probably use 1/4 watt......if they fail, they will open and not short (which would be bad Smiley ). Pretty sure mine are 1/4 watt.

Hope this helps.
Ed
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Tablet Man
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« Reply #228 on: November 08, 2017, 03:02:22 AM »

Thanks Ed,
I've managed to get some 1/2 watt ones hope these will be ok.
I'm all ready to connect everything up now.

Just wanna make sure I've got it right, can you confirm for me please.

600 ohm resistor soldered to center pin of RCA, speaker wire connected to this + to resistor - to ground on the RCA. I make two of these cables. RCA's go into a Y adaptor and into 'bridged input' on the Crown, bare wire ends into left an right channels on power amp as normal ( + into + - into -).
Set the Crown to 'bridged mono'.
Subs wired in PARALLEL to the Crown.

Is all this right? Or do I have anything wrong
Cheers
Neil
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Ed Schilling
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« Reply #229 on: November 08, 2017, 08:19:13 AM »

Hi Neil, yep. You got it. You might just check with your meter that the L & R  grounds are common on your power amp. You can not use this connection with most digital amps!
Ed
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Henry
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« Reply #230 on: November 08, 2017, 11:19:23 PM »

Hi Neil, yep. You got it. You might just check with your meter that the L & R  grounds are common on your power amp. You can not use this connection with most digital amps!
Ed

Is there a way to use a class d main amp with the Crown?  I've never thought about it, but with some of the new supposedly super-duper class d out there now, I'm getting a little curious.  Huh

Also, the class d amps don't get along with the Horn/Heil crossover, so that's not an avenue to pursue for the two-way Horns. But maybe it could be used for a different speaker.  A class d bass signal feeding a Crown could be a treat.

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Henry
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« Reply #231 on: November 09, 2017, 12:08:45 PM »

I see the 830667 is now going for $55.52 at PE.  Get two and free shipping (over $100).  

Madisound is almost $11 more and shipping isn't cheap.

It may be time for some holiday boom-boom (and a new pair of subs).  Grin
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Tablet Man
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« Reply #232 on: November 11, 2017, 07:57:17 AM »

Finally got a pair of these puppies up and running.
Now should I be hearing everything through the subs or just the bass?
At the moment I can hear everything through them vocals, guitar etc.
Is this right?
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Tablet Man
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« Reply #233 on: November 11, 2017, 08:20:37 AM »

Scrub that I think I've sussed it.
Had the Crown on bridge bypass instead of bridge lowpass doh!!!
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