December 01, 2023, 03:20:40 AM

Author Topic: Modhouse Tungsten  (Read 87 times)

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Offline [email protected]

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Modhouse Tungsten
« on: November 17, 2023, 01:02:15 PM »
Hi all! I apologize for a dumb question, as I probably already know the answer, but this more wishful thinking. I listened to a Modhouse Tungsten at Canjam Dallas and really dug it. I have mostly ZMF stuff and have a Crack and unbuilt Crackatwoa sitting in a box. I was wondering if I would be able to use these amps on the Tungsten and wanted to see if anyone had experience with the pairing. I think it is 150 ohms and that is lower than what is recommended, but I thought I saw somewhere that you can tube roll to slightly lower the usability of the amps. Anyways, any advice would be greatly welcomed. 

Offline Paul Birkeland

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Re: Modhouse Tungsten
« Reply #1 on: November 17, 2023, 02:14:26 PM »
So I think it is probably worth a shot to plug them into the Crack to see if anything remotely resembling an adequate listening level is possible; I suspect that will not be the case.

I see some recommendations of being able to deliver 20V into the headphones, which are 155 ohms.  This is really not that big of a deal with a tube amp, and you could take a Kaiju and substitute the output transformers for this pair, but ask the winder to stack them without an air gap for parallel feed:

The 75 Ohm and 150 Ohm configurations would be worth trying out, and you'd likely want the DC filament upgrade just to be sure the amp is nice and quiet.  7W into 155 ohms is 32V, though you'll get a little less than that since you'd be substituting a 3K transformer with a 5K unit.  I think this could be a fun project though!
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man