Oh dear, I must be slightly mad

Posted by: blythe on 23 January 2004

I have somehow managed after an extreme listening session to shut down one of three 250's.
My active NBL's were on song whilst listening to some "antique" rock music (City Boy "It's Personal") on vinyl and I know I was totally carried away but I still managed to shut down the mid range amp....
Thankfully it was right at the end of the track (Exit The Heavyweight) so it didn't spoil the music too much.........
Apart from moving to a a smaller room or trying 3*300's or 3*500's I guess I'll have to keep the volume down......

Hoping by the time I've typed this, the amps have cooled down, I'm off to listen to a few more classic tracks :-)

It sounded really great until it stopped by the way!

Computers are supposed to work on 1's and 0's - in other words "Yes" or "No" - why does mine frequently say "Maybe"?......

Posted on: 23 January 2004 by blythe

Oddly enough I thought the same. However, during a party, I'd probably tried to keep the volume down to a more sociable level!

I doubt I would have been listening that load or played the system that loud during a party!
I was home alone just getting right into the groove with no regard for anyone else.........
It was just the best listening environment :-)

It's working again now but I have finished my late night listen with something softer......
It had got rather hot though.......

Computers are supposed to work on 1's and 0's - in other words "Yes" or "No" - why does mine frequently say "Maybe"?......

Posted on: 24 January 2004 by Phill82

does a NAP180 have the thermal cut off thing that the 250 does? I've played music stupidly loud through my Epos es14s but the amp barely got warm. Is that because the epos have a fairly high impedance (I measured them using CLIO, they were about 10 ohms over most frequencies, dropping to a minimum of 7ohms) and therefore the average amount of current being delivered is not that great? Or is it because the 180 is essentially a 250 with a smaller power supply (and minus regulator things), so the transisters don't get to do as much?

Posted on: 24 January 2004 by NB

Maybe time for that 500 Blythe!

Regards

NB

Posted on: 24 January 2004 by blythe

quote:
Originally posted by PR:
blythe

A girl grabs for your knob (not that one) and you know her lack of HIFI sense after several wines means your 250’s are going to burn by accident.

Amps should go all the way (like women) and not complain about distortion or energy.

I couldn't agree more - but a girl grabbing my knob wouldn't have made any difference, 'coz on Vinyl, even on full volume, it still sounds great!

Computers are supposed to work on 1's and 0's - in other words "Yes" or "No" - why does mine frequently say "Maybe"?......

Posted on: 24 January 2004 by blythe

quote:
Originally posted by Phill82:
does a NAP180 have the thermal cut off thing that the 250 does? I've played music stupidly loud through my Epos es14s but the amp barely got warm. Is that because the epos have a fairly high impedance (I measured them using CLIO, they were about 10 ohms over most frequencies, dropping to a minimum of 7ohms) and therefore the average amount of current being delivered is not that great? Or is it because the 180 is essentially a 250 with a smaller power supply (and minus regulator things), so the transisters don't get to do as much?

Yes the 180 does have a thermal trip like the 250's.
I was playing at insane volumes. I mean FULL volume. It didn't sound distorted - just VERY loud. Mind you after 2+ bottles of wine, maybe it was distorted............
I didn't realise I was on full volume as my pre-amp is hidden from view and I use a remote extender to control the system.
When the mid range died, I ran over to the unit to check it out and was surprised to see my 252 volume was at maximum. Well, not really surprised but kind of, as I wasn't aware of it distortion or anything.
The other thing is that the bass amp is directy beneath the mid amp, so I imagine the heat from the bass amp would dissipate up into the mid amp - thus increasing the heat.
My answer would be to get a fan to blow over their cases if I'm going to listen at mad levels again (which I may well do sometime!)

Computers are supposed to work on 1's and 0's - in other words "Yes" or "No" - why does mine frequently say "Maybe"?......

Posted on: 24 January 2004 by blythe

quote:
Originally posted by NB:
Maybe time for that 500 Blythe!

Regards

NB

Hey NB, nice thought but to be honest if I can cut out 3*250's I'm sure I could cut out a 500!

After all 3*250=750 and 1*500=500

*LOL*

Anyway, although I haven't done the 500 Vs 3*250's demo, I can't believe there would be much in it...... (OK, I know I must be wrong on that)

Computers are supposed to work on 1's and 0's - in other words "Yes" or "No" - why does mine frequently say "Maybe"?......

Posted on: 24 January 2004 by Nime

The '180 certainly has a thermal trip. My wife managed to shut it down after a couple of hours of Metallica, White Stripe etc. Interestingly, the deep bass seems to have improved slightly since then. Perhaps the speakers were never fully stretched until that point? I wouldn't want anybody frying their amps just a for a little more (potential) bass. Which might just be a subjective judgement anyway. Perhaps she just blew the wadding out of the ports as invisibly fine dust?

Nime

Everyone has the right to be wrong.

Posted on: 24 January 2004 by Bosh

Blythe

Nice to hear your systems is sorted (although somewhat overworked

), did you end up with 3 Olive 250s ?

I recall the details of the demo before, but was the SNAXO and Supercap used Olive or latest reference?

Posted on: 25 January 2004 by blythe

quote:
Originally posted by Bosh:
Blythe

Nice to hear your systems is sorted (although somewhat overworked ), did you end up with 3 Olive 250s ?

I recall the details of the demo before, but was the SNAXO and Supercap used Olive or latest reference?

The SNAXO is new reference, the 250's and Supercap are Olive.
I think it'll be my last upgrade for quite a while!

Computers are supposed to work on 1's and 0's - in other words "Yes" or "No" - why does mine frequently say "Maybe"?......

Posted on: 25 January 2004 by Manu

Well, mixing new SNAXO and olive 250 is not a good idea. The SNAXO setup has change from vertical to horizontal amping. On the old one power was more speaded. Considering the new 250 power, this setup is no longer a necessity.
You should consider upgrading your olive 250 to new style.

Emmanuel

All opinions are my own, and reflect those of the organisation i work for, even if not stipulated.

Posted on: 26 January 2004 by colasblue

I suggest a cheaper option - buy a big fan and point it at the offending 250. Works even better if you pull it slightly out of the rack and fan the bottom. A more one box solution (or really 2 box) is to replace your 250's with 135's - they've got built in fans !