should i go old or stay new need help

i had a onkyo amp that sounded great needed new speakers was kinda broke so on the fly i bought polk speakers floor speakers then me amp went after twenty years lol so i bought a harmon kardon hk 3490 amp it doesnt seem to have the balls that my onkyo had? so i know these speakers arent the best but this 120 watt hk watt amp doesnt seem to be as loud as my old 80 watt onkyo
so im actually looking to buy a older carver tfm 25 as i always wanted one of the any body have any suggestions for me or input?????????
I bought a lot of older gear that is now called vintage (a ridiculous word use) and had plenty of trouble with it. By the time you figure out that this older stuff needs to be professionally refurbished with new electrolytic capacitors amongst other things, you end up spending the money near what a decent newer (used) piece would have cost. So I say look through the ads here for integrated amps and see what you can find. The recent mass market stuff is light weight indeed, it is not your imagination. That said loudness by itself is not the measure of a good amp, but the amp you do buy should be potent enough to drive your speakers.
Obviously buying older used gear can be a good way to squeeze more value out of your budget.

Yes, there are risks that go along with buying used, but many people do it so as to be able to get the most out of their audio $$$s.

The key is to ask the seller the right questions up front to help decide if a) the seller is trustworthy and b) the item is worth what you are paying.

Its usually a good idea to ask things like why the seller is selling, what is the ownership history of unit, are there any known defects or functional or sound quality issues.

Also know what something used is actually worth these days. DO NOT OVERPAY!!! That way if things do not work out, you can resell and move on without taking a big financial hit. Be aware of shipping costs as well in taht these can become large for larger heavier items that are not local. Buying local only is usually a good idea to keep costs low and reduce risks. You might even be able to audition in advance of buying.

Following sales on ebay is a good way to get an idea of what something is actually selling for. Audiogon blue book (pay by the month) is a good investment to get an idea what more popular high end audio items are selling for.

Stick with more common and popular products that have multiple professional reviews and many individual reviews available for them in order to help minimize risks.

Avoid one off or boutique type items that have little information available about them in general. The internet and all the info on it is your friend when it comes time to make buying decisions!

Doing the homework up front is always key to making a good buying decision, especially when the financial stakes can be high.