NS10s not speaking through Hafler amp

[Xander]

We're you coming out of the Motu when you were using the old amp?

I assume you tried adjusting the gain on each channel?

How is the stereo/bridged switch set?

Are the speaker wires secure on both ends? Are they the same ones you used with the old amp?

[Xander]

Oh, one more thing I thought of. Are you using some sort of balanced<-> unbalanced adapter cable to go from the Motu to the amp? An incorrectly wired cable (or using the wrong cable for the type of outputs or inputs that you have) could cause the polarity-inverted signals on pins 2 and 3 of an XLR to add together. This would give you pretty much zero signal!

[jon_nes]

We're using TRS outs on the Ultralite into the TRS ins on the Hafler on an 8 channel snake.

Both amps were definitely set to stereo.
We tested the NS10's on the Adcom GFA555 again and the worked fine.
Switched the copper speaker wire too.
The MOTU is cranked all the way up.

I don't know what else we could be missing.

BTW This is Joel's brother Jonathan. We're twins.

[Karloff70]

Why would you want to put a Hafler on your NS10's when you have a lovely GFA555?

[jon_nes]

Originally Posted by Karloff70

Why would you want to put a Hafler on your NS10's when you have a lovely GFA555?

The output of my board fried the left channel of the 555 and my repair guy scolded me for hooking it up to pro gear, so I'm keeping it out the studio.
It's now powering the speakers for our turntable and is doing great!

[jon_nes]

What does everyone think. Is it possible we just bought two lemons?

[NEWTON IN ORBIT]

Highly unlikely. Check and double check everything.

Silly question, but...

Did you turn up the sensitivity controls on the Haflers? There is that security cover thing.

Crank them, and turn up the MOTU slowly maybe.

I have a Hafler, which I run pretty close to full up. These may ship turned full down or something.

Short of that (no pun intended) there has to be a cabling or speaker wire screw up.

john

[jon_nes]

Originally Posted by NEWTON IN ORBIT

Highly unlikely. Check and double check everything.

Silly question, but...

Did you turn up the sensitivity controls on the Haflers? There is that security cover thing.

Crank them, and turn up the MOTU slowly maybe.

I have a Hafler, which I run pretty close to full up. These may ship turned full down or something.

Short of that (no pun intended) there has to be a cabling or speaker wire screw up.

john

Thanks for the suggestion!
Security covers? Where are those? We ended up turning the knobs all the way up. Is there another volume control on the amp?

BTW, we bought both of them from Ebay. (from different guys)

[Karloff70]

Originally Posted by jon_nes

The output of my board fried the left channel of the 555 and my repair guy scolded me for hooking it up to pro gear, so I'm keeping it out the studio.
It's now powering the speakers for our turntable and is doing great!

Your repair guy has no idea about 'pro gear' judging things on connectors, not by ears. A good 555 should certainly sound more 'pro' than a Hafler 3000. My 545 certainly beats a friend of mine's 3000. And not by a small margin, but then mine is Jim Williams'd up, too....you just need some proper gear to connect him. I run an Ebtech line shifter in front of mine to come down to -10 unbalanced. I would stick the Hafler on the deck instead.....

[jon_nes]

Thanks Karl! I check out the Ebtech and try switching them.

[NEWTON IN ORBIT]

Originally Posted by jon_nes

Thanks for the suggestion!
Security covers? Where are those? We ended up turning the knobs all the way up. Is there another volume control on the amp?

BTW, we bought both of them from Ebay. (from different guys)

Some of them (later models) have security covers (panels) over the sensitivity controls so that when left in permanent installation they cannot be tampered with. Or not easily anyways.

No, there should not be any other controls on there.

Karloff, I have an OLD early 90's Hafler prior to being purchased by Rockford that is a MOSFET deal, and it sounds really pretty decent. I have a Bryston 3b as well, and it ain't too night and day of a difference.

Actually, the bottom end on that little Hafler is really nice and solid and tight.

Is it a Krell, Cello, or Boulder? err...not by a long shot, but it's still nice. Certainly can mix through it without losing a heap of detail. If it was all I had it wouldn't stress me out.

Their amps and speakers were once good enough for this dude:
Hafler - Home

OP: I have no idea what's going on with your rig at this point, but again, it is highly unlikely that both channels on both amps are broken. Bizarre. Try feeding the Hafler with something else (anything, Ipod with 1/4" adapter etc) before you give up on them. If it works, find out what's wrong with your wiring.

It's got to be the wiring.

john

[Kronos147]

Originally Posted by JoelNesv

NS10s... Hafler P3000

That's what I use here. No problems.

[Karloff70]

Just saying I prefer my (admittedly Jim Williams'd GFA-545) to my friend's Hafler 3000 by quite a bit. Doesn't mean the Hafler is unuseable or anything. Just not as nice.

[Snatchman]

I would say double check your settings on the stereo/mono selctions on the Haflers..I had a similar problem when I got mine. Thought one channel was dead out of the box as it had the same symptons you are dealing with.Did a double check with the selection on the back, worked fine every since..!..BTW, are you getting the signal present LED lighting up..?..Good luck

[jon_nes]

Turns out it was a connector issue! Thanks for your suggestions everyone!