Now I still need a 100 w (into 8 ohms) sub amp. The 307s are good to 100 hz so.

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F302998469177 Bought this to run off the 3 kw inverter Cheaper, great price too. Class A without much fuss. Just mounting it, 11 kg but a slim frame.

Found it Only 3 grand 20 w x 4ch (est into 8 ohms) Class A mode https://www.audison.eu/products/th-quattro/

https://www.amazon.com/Audison-AV-Quattro-4-ch-Amplifier/dp/B00BZ3TPPM Is this it? 1200.00

https://www.xciteaudio.com/audison-sr4-4-channel-360w-power-amplifier-with-crossover?sg_type_pg=bestseller&sort=ps.price&order=DESC There are 2 of the brand.

@mrtim6 likes this with his RSX https://www.alpine.com.au/product-category/amplifiers/pdx-audiophile-amplifiers/?orderby=price I would opt for the F model. Still the replaceable op amps in the other A/B amp, hmmm…

A good option. https://www.zapco.com/z-150-4-ap

Here is one I found https://www.monolithicpower.com/en/catalog/product/view/id/2438/s/ev7748df-00a/category/32/

Just bought them. TD307MK2A This is for the dashboard of my Sprinter RV. 30 Watts max. The Sony RSX head-unit is the preamp. I need a 120 watt sub amp too. Thanks for a good recommendation. I would like a mosfet. Can I even find a 12 volt amp to do them justice?

DeOxit is a great conductance improver bare copper. Goodby

How much? Carrier?

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Hiby then UAPP in that order by

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Some shear enlightenment to the status quo of pro audio. Thank you Sir