Alpair 12P

Dedicated to those large boxes at one end of the room
User avatar
pre65
Amstrad Tower of Power
Posts: 21373
Joined: Wed Aug 22, 2007 11:13 pm
Location: North Essex/Suffolk border.

#31 Re: Alpair 12P

Post by pre65 »

I did find Colin's reply to me at tad "unfriendly", but no matter.

I await his answer to Greg's question with interest. :)
The only thing necessary for the triumph of evil is for good men to do nothing.

Edmund Burke

G-Popz THE easy listening connoisseur. (Philip)
User avatar
Nick
Site Admin
Posts: 15711
Joined: Sun May 06, 2007 10:20 am
Location: West Yorkshire

#32 Re: Alpair 12P

Post by Nick »

It almost doesn't matter what "a while" is. Colin has had examples of failures, so they can fail. Gregs experience shows they don't all fail. The combined effect is we know they can fail. without a statistically viable sample we cant make any estimation about the likelihood of a failure, but no matter how many have had Gregs experience of no failure, just one failure means that the reliability can never be 100%.

Its possible that Colin had a faulty sample, and it never happens normally, or it could be Greg was lucky, knowing the while won't change either of those.
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.
User avatar
pre65
Amstrad Tower of Power
Posts: 21373
Joined: Wed Aug 22, 2007 11:13 pm
Location: North Essex/Suffolk border.

#33 Re: Alpair 12P

Post by pre65 »

What Nick says is very true,but does not everything we buy have the same likelihood of problems ?

From a 50p ball point pen to a £250,000 Rolls Royce.
The only thing necessary for the triumph of evil is for good men to do nothing.

Edmund Burke

G-Popz THE easy listening connoisseur. (Philip)
User avatar
Greg
Social outcast
Posts: 3198
Joined: Wed May 23, 2007 11:14 am
Location: Bristol, UK

#34 Re: Alpair 12P

Post by Greg »

Maybe it's because my crossovers are not being rattled within the speaker cabinet?
User avatar
pre65
Amstrad Tower of Power
Posts: 21373
Joined: Wed Aug 22, 2007 11:13 pm
Location: North Essex/Suffolk border.

#35 Re: Alpair 12P

Post by pre65 »

Greg wrote:Maybe it's because my crossovers are not being rattled within the speaker cabinet?
Or, maybe the production quality was better 20 years ago ?
The only thing necessary for the triumph of evil is for good men to do nothing.

Edmund Burke

G-Popz THE easy listening connoisseur. (Philip)
User avatar
Nick
Site Admin
Posts: 15711
Joined: Sun May 06, 2007 10:20 am
Location: West Yorkshire

#36 Re: Alpair 12P

Post by Nick »

What Nick says is very true,but does not everything we buy have the same likelihood of problems ?
No just because we know that a cheap plastic toy from the market and an airbus both have a likelyhood of failure, ie not 100% reliable, that doesnt mean they have the same likelyhood of failure.

What would you prefer? Colin didnt tell you about the failure he had? It doesn't make Colins life any better to tell you, it doesnt reduce the chance he will have a repeat problem. But it may help you to not repeat what was his failure.
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.
User avatar
pre65
Amstrad Tower of Power
Posts: 21373
Joined: Wed Aug 22, 2007 11:13 pm
Location: North Essex/Suffolk border.

#37 Re: Alpair 12P

Post by pre65 »

No, as I said earlier, I really appreciate ANY advice.
The only thing necessary for the triumph of evil is for good men to do nothing.

Edmund Burke

G-Popz THE easy listening connoisseur. (Philip)
User avatar
IslandPink
Amstrad Tower of Power
Posts: 10041
Joined: Tue May 29, 2007 7:01 pm
Location: Denbigh, N.Wales

#38 Re: Alpair 12P

Post by IslandPink »

Be interesting to hear how it goes anyway Phil
I'll be playing around with a Quasar-style crossover myself this week, to blend the Supravox and FF225WK. Need to drill some new holes in the Perspex though ( unfortunately ) as the FF's have yet another bolt-circle to the FE and the B&C's.
"Once you find out ... the Circumstances ; then you can go out"
User avatar
pre65
Amstrad Tower of Power
Posts: 21373
Joined: Wed Aug 22, 2007 11:13 pm
Location: North Essex/Suffolk border.

#39 Re: Alpair 12P

Post by pre65 »

Good luck Mark. :)

I might just go for two very cheap (and nasty) inductors for test purposes, and if it works out I can save up for the Mundorfs.

Just that with the Alpairs, and the CD transport recently my "hi-fi fund" is depleted. :(
The only thing necessary for the triumph of evil is for good men to do nothing.

Edmund Burke

G-Popz THE easy listening connoisseur. (Philip)
User avatar
pre65
Amstrad Tower of Power
Posts: 21373
Joined: Wed Aug 22, 2007 11:13 pm
Location: North Essex/Suffolk border.

#40 Re: Alpair 12P

Post by pre65 »

I'm still gathering information re the crossover inductors, but in the meantime I've ordered two 5mH ferrite cored ones for test purposes.

I need to spend money on non hi-fi items (like a holiday) in the coming months, so at least I will be able to try the parallel crossover, and the ferrite cored item is a step up from the one I currently use in the series crossover. :)
The only thing necessary for the triumph of evil is for good men to do nothing.

Edmund Burke

G-Popz THE easy listening connoisseur. (Philip)
User avatar
pre65
Amstrad Tower of Power
Posts: 21373
Joined: Wed Aug 22, 2007 11:13 pm
Location: North Essex/Suffolk border.

#41 Re: Alpair 12P

Post by pre65 »

Tomorrow (Wednesday) I'm going to reconfigure the crossover to parallel using the components I have.

Two people (whose opinions I trust) have told me the inductor value is not critical, and the cap is not that far out, so I'll see what happens and report back.

It's only temporary till the "right" bits are delivered.
The only thing necessary for the triumph of evil is for good men to do nothing.

Edmund Burke

G-Popz THE easy listening connoisseur. (Philip)
User avatar
pre65
Amstrad Tower of Power
Posts: 21373
Joined: Wed Aug 22, 2007 11:13 pm
Location: North Essex/Suffolk border.

#42 Re: Alpair 12P

Post by pre65 »

Crossover mods complete. :)

Just fired them up, and initial impression is "more vibrant".

I have no padding resistor on the Fane, so bass is more "fullsome" than in the past, but that is a plus !

I'll listen to some favourites and see how the balance is.
The only thing necessary for the triumph of evil is for good men to do nothing.

Edmund Burke

G-Popz THE easy listening connoisseur. (Philip)
User avatar
Dave the bass
Amstrad Tower of Power
Posts: 12273
Joined: Tue May 22, 2007 4:36 pm
Location: NW Kent, Darn Sarf innit.

#43 Re: Alpair 12P

Post by Dave the bass »

pre65 wrote:
I'll listen to some favourites...........
Those poor likkle speakers.............. :)
"The fat bourgeois and his doppelganger"
User avatar
pre65
Amstrad Tower of Power
Posts: 21373
Joined: Wed Aug 22, 2007 11:13 pm
Location: North Essex/Suffolk border.

#44 Re: Alpair 12P

Post by pre65 »

Dave the bass wrote:
pre65 wrote:
I'll listen to some favourites...........
Those poor likkle speakers.............. :)
They are loving it -------- yes, really. :lol:

I'm now trying 2R padding resistors on the Fane 18" bass helper.
The only thing necessary for the triumph of evil is for good men to do nothing.

Edmund Burke

G-Popz THE easy listening connoisseur. (Philip)
User avatar
pre65
Amstrad Tower of Power
Posts: 21373
Joined: Wed Aug 22, 2007 11:13 pm
Location: North Essex/Suffolk border.

#45 Re: Alpair 12P

Post by pre65 »

2R is more balanced.

The 5mH inductors and 100uf caps have come today, but I can't really do anything till Thursday afternoon now. :(
Last edited by pre65 on Fri Jan 20, 2017 8:08 pm, edited 1 time in total.
The only thing necessary for the triumph of evil is for good men to do nothing.

Edmund Burke

G-Popz THE easy listening connoisseur. (Philip)
Post Reply