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 WTB Carvin x60b head View next topic
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Gregory
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Joined: 29 Oct 2009
Posts: 12
Location: Ohio

PostPosted: Fri Apr 01, 2016 7:46 pm   Reply with quoteBack to top

Hello all. I am wanting to buy a x60b head. Any out there?
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hankwillow
Gone to the dogs


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Joined: 09 Sep 2007
Posts: 484
Location: Denton, TX

PostPosted: Sun Apr 03, 2016 12:04 am   Reply with quoteBack to top

http://forums.carvinmuseum.com/viewtopic.php?t=30076
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Gregory
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PostPosted: Sun Apr 03, 2016 3:41 pm   Reply with quoteBack to top

Thanks.
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X100BNut
Too Much Free Time


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Joined: 28 Jul 2007
Posts: 799
Location: Hayward, CA

PostPosted: Wed Apr 06, 2016 12:37 am   Reply with quoteBack to top

[color=white] There aren't many X60B heads out there...

It's easy to remove the inner or outer pair of power tubes and cut the X100B's power in half. It's a good Idea to set the speakers impedance switch one setting lower than the speaker load - Set to 4 Ohms for an 8 Ohm speaker setup, or 8 Ohms for a 16 Ohm speaker load. This doubles the impedance the tube see, and compensates for having half the number of tubes. Current per tube remains the same, and output power is cut in half. Most X100Bs have a 100%/50%/25% switch, but the limiting is done in the phase inverter, and phase inverter overdrive is only sort of kind of like power tube overdrive.

Carvin saved on sockets, tubes, and smaller transformers, but the savings weren't huge.
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Gregory
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PostPosted: Wed Apr 06, 2016 7:52 am   Reply with quoteBack to top

My cab has 2 65 watt, 8 ohm apiece, speakers. Not sure if they are wired parallel or series. Can you tell me what settings the amp should be on? The cab has a 4 ohm and 16 ohm selector switch. Im leaning towards the X100B.
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X100BNut
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Location: Hayward, CA

PostPosted: Wed Apr 06, 2016 8:16 am   Reply with quoteBack to top

[color=white] with a 2x12" cab, using 8 Ohm speakers, the speakers can be wired in parallel for 4 Ohms, or in series for 16 Ohms. The 4 Ohm setting might sound a bit tighter, but most tube amps can't drive less than 4 Ohms, so you can't add another cab with that setup. With the cab set for 16 Ohms, you could set the impedance selector switch on the amp to 8 Ohms and run two tubes, either the outer or inner pairs.

Check your mail.
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