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Post new topic Steelaire combo amp with 2 TT-12 speakers
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Author Topic:  Steelaire combo amp with 2 TT-12 speakers
Nick Holden

North Dakota, USA
Post Posted 3 Nov 2017 5:28 pm     Reply with quote

Anybody using a Steelaire Combo amp Help!!! Can I use 2 separate cabs with TT-12 speakers one plugged into extension speaker 8ohms, and the other into internal speaker 4ohms and not hurt anything??? The TT-12s are 8ohms. Thanks for any info.
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Dave Diehl

Mechanicsville, MD, USA
Post Posted 4 Nov 2017 6:53 am     Reply with quote

I talked with Pat Quilter about this and he told me that.. The Steelaire is intended for one or two 4-ohm speakers. A single speaker draws up to 200W and should be connected to “INT”. A second speaker should be connected to EXT. Dual 4-ohm speakers split the power evenly. If one of them is 8-ohms, it will draw 1/3 the power (66W) and the 4-ohm will draw 2/3 (133W). It won’t matter which jack each is in. When the second jack is used, a contact is lifted that reduces the optimum output impedance to drive the heavier load. The amp is quite “forgiving” about impedance, will generally deliver the same power over a wide range, and the only effect of mismatches will be minor changes in tone.
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