Greetings, I am just about finished building my 140L sub,with it i will be using a Dynaco 400 stereo amp,it was my uncle's,i guess he doesn't want it anymore so he handed it down to me (lucky me),and i will be using the shiva driver that i ordered already but unfortunately it is not available right now,but i am willing to wait because Bob Reimer from creativesound said that they expect to have more by end of month.Since it's a stereo amp how should i wire shiva to get 4ohm load? here are some specs for my amp:Specifications: Power Output: 20 Hz to 20 KHz, both channels driven: 200 watts continuous average per channel @ 8 ohms; 300 watts continuous average per channel @ 4 ohms; 100 watts continuous average per channel @ 16 ohms. Monophonically: 600 watts rms @ 8 ohms. Intermodulation Distortion: Less than 0.1% at any power level up to 200 watts rms per channel into 8 ohms with any combination of test frequencies. Distortion reduces at lower power levels. Typically less than 0.03%. Harmonic Distortion: Less than 0.25% at any power level up to 200 watts rms per channel into 8 ohms at any frequency between 20 Hz and 20 KHz with both channels driven. Distortion reduces at lower power levels. Typically less than 0.05%. Power at Clipping, single channel, 2500 Hz, less than 1% distortion: 235 watts @ 8 ohms; 350 watts @ 4 ohms; 135 watts @ 16 ohms. Ppower bandwidth: 5 Hz to 35 KHz at less than 0.25% total harmonic distortion - half power output, 8 ohm load. Frequency Response: +0, -1 dB, 8 Hz - 50 KHz @ 1 watt into 8 ohms; ±0.5 dB, 20 Hz - 20 KHz @ 200 watts. Hum and Noise: Better than 100 dB below rated output, full spectrum. Input: 50,000 ohm load; 1.6 volts for 200 watts @ 8 ohms. Slewing Rate: 8 volts per microsecond. Damping Factor: Greater than 80 to 1 KHz into 8 ohms; Greater than 30 to 10 KHz into 8 ohms. Channel Separation: Greater than 60 dB by IHF standards. sorry for the long post.