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Hafler DH-500 amp rewire

Can anyone please comment on what wire I should use to re-wire my Hafler DH-500?

The amp sounds great, but with the original wires at 18ga, and some frayed, I would think it's an obvious and cheap tweak.

Does anyone know what the original wire was, manufacturer / type.

Another obvious question is whether going a little thicker, like 16ga or 14ga, would improve the audio. Funny how the Canare 4S11 speaker cables are fed by an 18ga wire inside the amp.

I've also read of undesirable results when changing the wires, even when going to expensive options such as silver.

Cheers,
alex333

Showing 1 response by himu

himu's avatar
himu
6 posts
 
Oil the fan while you are in there.

Clean the ground contact point.
Tighten the speaker terminals if needed.

May want to replace relay, those are the contact points
that the single passes thru.

Re grease the TO3 output transistors, and clean the contacts while you are doing this.

New bridge rectifier soft recovery type.

Bypass the big caps with 5uf poly pro or oil.
(make sure they are not leaking and are still good probably are but just check around the screw terminals)

The internal wire change will not make that much difference sonically.The power cord will, esp if you can
fit a 20 amp IEC in there.

Bypass the input coupling capacitor, if your pre already has an output cap.

Change out the electic caps on each driver board
Cerafines or equivalent.

Put volt regulation on the pre driver stage, do not do it
on the driver stage it restricts the sound.

Change the driver tranistors from bypolar to mosfets
and put low capacitance bypolars inplace of the old predriver tranistors.

If you want a DH500 already done to this level email me
I have afew done already.
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