This Marker Class A Amplifier is available in two models:

20 Watt model: $699.00
Description and Specs: 1x12ax7 dual triode pre amp.Drives 1x6sn7 dual triode driver into 2x5881 paralell single ended configuration pure class a sound.Full 20 watt rms output into a 4 ohm load.

40 Watt model: $999.00
Description and Specs: 1x12ax7 dual triode pre amp.Drives 1x6sn7 dual triode driver into 4x5881 paralell single ended configuration pure class a sound. Dual output stages 4ohmx2.40 watts rms. total class a watts. Requires two speaker cabs for this one. 106 watts audio input to final.  40 class a watts output as loud as any 100 watt amp, but sounds so much better!

All transformers are greatly over rated for a cool temperature. A very long lasting and dependable amplifier.
20 Watt model: $1000.00
Description and Specs: This is a dual output 4x new old stock general electric stubby.  Output tubes cost $50 per tube if you can even find them any more.  4ohm speaker imp. sounds like 100 ab watts. Fan cooled all hand wired, ready to plug and play! CAUTION you must have two speaker cabinets hooked up to this amp at all times.  One of he best sounding amps I've ever played thru. Compare to $2500.00 boutique amps! Guaranteed to make your guitar sound great!!