Lab Gruppen FP14000 clone amplifiers - Page 44

Didn't you just say you wanted to pick up the Yorkville Unity's? The ones you linked are the passive version. You don't need external processing. Didn't you also say that you were going to use these in your home with a home theater AVR or stereo processor? Dude, that IS your processor. For subs, there will be a sub-out that will provide the low pass filter and the opposite for your mains.

ahhh snap! yes the unity's are passive with built in crossovers... for some odd reason somebody made me think these amps could only power subs. im not an expert but, i know if all you have is a low pass filter.... you will destroy a tweet or mid.

Ummm... yeah. These aren't your garden variety Costco speakers.

That's the spirit!!!

Welcome to AVS

Nah, that's a high pass filter you're thinking of.

I cleaned up my post...

Perspective

Costco sells the best HT anywhere.....LOL

Not or anyoneSO does anyone know if I NEED to use a 7hz Hpass when using a 10Q for my subs?

I only ask because I thought the 10Q had a 7hz roll off anyways. I know that other parts of the signal chain will probably have roll off also but I am just wondering about these 10Q's. What are your thoughts MK?

Not has a really low freq hpf... although he wanted to implement it with minidsp and apparently the bi quad filters werent functioning right. I dont know what came of that. I also cant remember why he has a high pass, i think its so his lms ultras dont over exert.

I thought he used a Hpass at 7hz. When I simulated the 21's with a 7hz Hpass I wasn't missing much verse not having one at all. BUT when having one the subs cant really ever be pushed hard enough by me with 2500 watts.

I will be just getting a pair of 10Q's for my L/R and subs.

Thanks Not. I was going to buy a 2x4 for the subs and a 2x8 for the mains or a 4x8 if it can be configured to do the same thing.

Either way thanks again.

8x8 it is. Thanks again. I keep looking at your 1U build and think I will do pretty much the same thing you did. Looks awesome and professional. Something to be proud of is what I am hoping for.

First, it very cool Denon supports their statement, legacy products like that. That 5308 is truly a statement piece, and seriously, them offering upgrades, that's just fantastic. With your reference quality LF capability, like you,..I too am quite interested in what the added granularity/control points that accompany Audyssey MultEQ XT32, would flesh out of your system. It'd be interesting to see an un-smoothed, before and after comparo. With the added processing capability, I'd suspect the range between the transition frequency, and the upper end of the subs would benefit to a large degree.

It's my understanding the HT SubEQ technology, is embedded into the XT32 offering. That said, I'm curious how they would implement the additional, discrete "Sub Two" controllable output, into the current back panel I/O's. That second channel of EQ/processing, in both the time and freq domains, can offer up some significant benefits. Certainly, it's not like you need it, but it's there none the less. Sure, there is the rogue unpredictability w/some Audyssey tunings, but w/measurement, that's easily discovered.


Good luck, ... and thanks for supporting this important thread.

just got 2 emails from johnson today... i think its funny how he says "order one FP14000 to test quality at first". test the amp, if it works great, if it doesnt, i'll send you parts and a schematic. he also referred this site... the thread and all for the price of these amps compared to the original, this is soo worth the gamble.

that Fp1400 is a serious beast! however, i think the FP10000Q is better suited for me. i can power 2 mains, a center, and a bass horn on one amp. thats pretty awesome! i just hope it doesnt spudder and i have to constantly replace parts and stuff.

Spoke with Johnson via email about why I feel my amp is not putting out as much juice as it should and his suggestion was to keep the gain at 44db's, keep VCL at max, but use the soft VCL setting, anyone tried this and seen a marked improvement?

What is the problem you are having?

So...running the one UXL 18 off one channel of the FP14K.

Anyone else have to boost the crap out of the receiver (onkyo 1007 here,) After Audyssey...I went from -10 to +5 on the subwoofer level. I have the gain on the clone at about 3/4 and I think we are about 50% of the driver's potential.

Never had to turn the avr up that far before with the behringer and dayton amps....

Here are my gain settings:

4311ci: -5
SMS-1: 15
FP14k: a little under 11 o'clock

I have a Yamaha RX-A3000 with an AS-EQ1. Had the gains maxed on the EPX4000's never came close to the clip lights unitil I had the receiver at +10. My FP14k is around 25% to 30%. The receiver level is set at 0 to +5 depending on source material and mood. Taps the clip lights on bass scenes like WOTW with level at +5 and volume in the -5 range.

After more experimentation looks like it was more J River than the AVR

Im clipping the amp with the sub +5 over reference, but listening at -10 master volume and the subs dont seem to be moving near as much as they should be. Im definitely not stressing the drivers and I feel with 4000 watts each should make them almost come out of the boxes. im still tweaking but Johnson suggested going to the soft vcl and I wanted to see if anyone else has seen some improvement when doing this

@beastaudio could you please let me know your jumper settings on the back when you get a chance?

Also try bridging the amp on one sub and see what is happening. If the amp clips when bridged there is something wrong for sure.

Anyone know what exactly the differences are between the hard & soft settings are??

Pic attached.

Mk, I'm running them 4 ohm stereo right now so rewiring my only other option is 8 ohm mono, which is the same amount of wattage, jut one less speaker wire.

Why use 195V? I picked what ever was closest to my outlets, do you have 220 V's or something? I have 120 V and picked whatever was closest to that. Mine are also on soft clip but never changed it or clipped to matter.

Beast when you say the amp is clipping at +5 and -10 master what material are you using? Music? What kind? Those drivers wont ever sound stressed with most music you will melt the coils first same as an LMS. You might get some excursion out of dubstep or whatever.

Have you tried something like XMen 1st class or wotw? If you are running one of those and not getting much excursion then something is wrong. Try couple of demo scenes.

What type of ac line do you have the amp plugged inti Maybe its a 120v 15A that is sagging really bad under load which would limit the power. Just an idea.