SpeakerTalk

ceda · Junior Contributor 10+ Joined: 10 Feb 2009 Posts: 13

Hi there,

I am new here, so I just whant to say Hi to all of You!

What You think about Quad 405, Hafler 110, and Kef 104 combination?

Tnx

ceda · Junior Contributor 10+ Joined: 10 Feb 2009 Posts: 13

http://www.hifi-forumi.com/forum/download/file.php?id=18592&mode=view

speakerguru · Posted: Tue Mar 03, 2009 12:13 pm Post subject:

Hi and welcome,
Model 104 had a very low impedance over a small frequency band at crossover. There was a dip to below 3 Ohms (resistive part) around 3 kHz. This can cause the 405 to current limit at high level. If it happens it is obvious. The power amp output bounces between the rails making a nasty sharp cracking noise. It is not subtle. A deaf man could hear it!

Changing to 104aB and/or 405-2 fixes the problem. OTOH if you don't play so loud, forget what I said and don't worry about it.

ceda · Junior Contributor 10+ Joined: 10 Feb 2009 Posts: 13

Thank You for the info.

The 405 is refreshed (critical parts) and to me works just nice.

I forgot to say..

What You think about Hafler?

proffski · Posted: Sun May 31, 2009 6:55 pm Post subject:

I had a great respect for Hafler products here in the UK.
This was a great many years ago, sadly I have not seen any Haffler equipment for a long time, my last contact was with the very popular Hafler Pre-Amplifier made in the 1970s.

The Pre-Amplifier in question was the utterly sweet sounding HD-101.
A glorious beast in those heady days with oodles of information and dynamic headroom, lovely!
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ceda · Junior Contributor 10+ Joined: 10 Feb 2009 Posts: 13

It works just fine but only thing I found bad in this combination is that You can't turn the volume up properly because it becomes so loud very quickly (first quarter of knob).

English amp & American preamp...

Thanks for Your post.

Cheers.

proffski · Posted: Sun May 31, 2009 7:50 pm Post subject:

ColinR · Posted: Mon Jun 01, 2009 1:51 pm Post subject:

ceda · Junior Contributor 10+ Joined: 10 Feb 2009 Posts: 13

OK.
So, what is the best thing to do?

Thanks for Your attention on this matter.

ColinR · Posted: Mon Jun 01, 2009 6:11 pm Post subject:

Make up a stereo pre to power lead with a 1350R component in series with the signal and a 150R from signal to earth for 20dB attenuation.

Or stick in the 405 input or stick in the Hafler output.

You'll need 5% (or better) resistors for each channel as you don't have a balance control.
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ceda · Junior Contributor 10+ Joined: 10 Feb 2009 Posts: 13

I get Luxman sq-700x and with quad it sings perfect!
Now I can hear what kef 104's does...

Outstanding sound!

Thank You all for your advices.

Regards!

Ceda

Here is the picture:

http://www.hifi-forumi.com/forum/download/file.php?id=25963&mode=view