Lab Gruppen FP14000 clone amplifiers - Page 166 - AVS | Home Theater Discussions And Reviews
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post #4951 of 4961 Old 03-23-2015, 05:05 AM
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Originally Posted by Bassfeen View Post
If you using Horn Speakers i highly suggest ATI Amplifiers. I had 101 DB horns in the past every single amp made a hissing noise except the ATI amplifier. They sound cleaner too.
Any reported hissing from the FP/FB10k clone from Sanway? These horns are 112db 1w/m in a 90x40 horn (and 100w rms so 130db theoretical continuous db).
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post #4952 of 4961 Old 03-23-2015, 09:16 AM - Thread Starter
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Dude, you don't need a 10kw amp for 112db sensitivity horns. I'd definitely recommend against it. Look at some of the Emotiva stuff.
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post #4953 of 4961 Old 03-23-2015, 11:44 AM
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Originally Posted by notnyt View Post
Dude, you don't need a 10kw amp for 112db sensitivity horns. I'd definitely recommend against it. Look at some of the Emotiva stuff.
Don't NEED any of this, do we? :P
The MFs are two pairs 8ohm 500w 12" 101db 2.83v 1m (200hz to 2000hz, then tapering off at both ends). To go with one pair of horns. Then doubling up in numbers over time, adding amps as required (can probably fit like 10 pairs of horns on one pair of FP10k channels, haven't really done the math yet). Eventually to include a pair or two of 18" 1500-2000w high efficiency LF drivers. If I go for a cheaper amp next to a good amp for the MFs then its more expensive than just going for one good FP10k. And I'd get worse S/N and less thermal overhead, and less future headroom (I can add horns to these two channels for quite some time without needing another amp).
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post #4954 of 4961 Old 03-23-2015, 11:47 AM - Thread Starter
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s/n is generally best near max output, you really need something with a low noise floor for horns like that. I don't know the performance of the fp10k in this regard.
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post #4955 of 4961 Old 03-23-2015, 12:50 PM
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Originally Posted by notnyt View Post
s/n is generally best near max output, you really need something with a low noise floor for horns like that. I don't know the performance of the fp10k in this regard.
That's why I asked if there has been reported any hiss at HF. If its an inaudible noise floor, its not a problem.
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post #4956 of 4961 Old 03-23-2015, 07:35 PM
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Originally Posted by notnyt View Post
I know someone local with one, will see if they want to volunteer it for abuse.
Is there any rhyme or reason as to how one user/s say they absolutely punish their clone without a single problem and others say they run theirs at moderate levels and have all sorts of board and power supply issues; User error, bad batch, etc. If it is indeed user error, I and I'm sure others would like to avoid such errors. Don't get me wrong, replacing boards and power supplies is a part of my job description, but I'd rather not do that once I make it home; I'd rather enjoy a functioning piece of equipment
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post #4957 of 4961 Old 03-23-2015, 07:47 PM
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I don't know anything beyond AVS as far as the clones, but they appear to be making almost constant improvements on them....

The newer clones seem to be able to do lower OHM, which I would still not recommend below 4 Ohm until a new unit is on a bench and beaten hard.

It sure seams the newer clone FPs are capable of taking a beating in all but road crew / outdoor situations. But I don't have much info. I would not be afraid of using a few in my local carp band shows, but I am getting old and am now looking at cheaper Class D as I don't like hauling around heavy gear anymore. I am even looking at going lighter for my bass guitar amp and cabinet if I can find a good replacement sound.

Getting a good e.q.ed sound out of anything can take a good deal of time. Time is seems so much more valuable as we get older, even doing something we enjoy
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post #4958 of 4961 Old 03-24-2015, 03:51 PM
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Has anyone uninstalled the thermostat (fan) control in FP14000 home theater version before?

DAC/Preamp: miniDSP 4x10 HD
Speakers: JBL 4343B, JBL 4430 and JBL 120Ti
Amplifiers: Emotiva XPR-1, Denon POA 1500, QSC GX5 and Sanway's LabGruppen FP14000 clone
Midbass modules: 4x DIY JBL 2226
Sub: 4x DIY LMS Ultra 5400
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post #4959 of 4961 Old Today, 02:23 AM
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Need advice. I'm trying to repair a power cycling FP10K with the variable resistor fix. I've added a variable resistor set to 2.5k ohms to the specified points and the amp seems to be staying stable, however it has once tripped my power circuit break, and when I check the voltage at the 220V and 153V point, I get 270V and 170V respectively!?

Should I try setting it to an even higher resistance?

This is the first time I've tried working with something like this so I'm scared to make the problem worse..
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post #4960 of 4961 Old Today, 03:14 AM - Thread Starter
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post #4961 of 4961 Old Today, 03:21 AM
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Yes I've contacted Johnson and am awaiting a reply.

I've managed to get the 153V points stable at roughly 153V with the resistor set to around 6k ohms, but the 220V points are still reading at around 280V??
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Lab Gruppen Fp 14000 , Sanway Fp 10000q
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