Good speaker wire limited budget Spica Angelus

NO. The lower the better (ie 12 gauge is much thicker than 18). You should use at minimum 18 gauge. 12, 14 or 16 would be better.

Honestly though, Spicas aren't known for bass. I just did a testing with a pair and the imaging and mids were great but the other speakers had much better highs and bass (coincident and angstrom). If you like the sound, get a sub. A passive sub and crossover would work well and if you need more power (since spicas are not that efficient), get a powered sub with a nice crossover.

There will never be agreement on what gauges to use,but another factor is how long do the runs have to be.

Inductance and resistance come into to play with the longer the runs. I use 26AWG going to my Tweeters and 18AWG going to my Woofer in a Bi-Wiring scenerio.

47Labs OTA is only 26AWG and it's some of the best Copper Cable around. I think to be safe it should be atleast 22AWG for 6-ft. runs and 18-20AWG for runs longer than that,but it depends. I am using 24 AWG Silver WIre in 8ft. runs at the moment and am satisfied.I also have 18AWG Copper going to the Woofers in the same legnth.

If you ever get to try or hear OTA it is as fast as Silver with just a little more of a Roll-off than Pure Silver. I use OTA for my internal wiring of speakers with great results. I am trying to find an alternative to it to bring down cost it's that good.

You can buy uninsulated Silver and get something that will be used as an insulator like TechFlex.Then terminate it and sel with heatshrink and you'll save $$ and have some of the best cables for under $100.

You will need to get them broken in right though.

http://www.partsexpress.com/webpage.cfm?&DID=7&WebPage_ID=161

As an owner of Spica angelus I mostly agree with elevick. My only quibble with his advice is :
1) The highs on the angelus are no so rolled off as some would have you think. I compared the angelus to the spendor s3/5 and they won easily in highs, and destroyed the spendors on imaging and mid-range. They are great speakers for everything except bass.
2) If you're going to add a sub get a powered sub. I use a REL strata and it blends perfectly with the spicas.

I'm not really sure that you'll get the bass you want from the spicas by just changing the wire, since they're a very lean sounding speaker.

Canare Starquads are easily the best inexpensive cables available.

I would try NORDOST flatline cable...this is very transparent cable for the money...with a very open and airy presentation...and will extend the highs on your SPicas(I used to own the tc-50s) and adhance their strenghths: imaging and soundstage...I wouldnt worry too much about the bass...and a subwoofer then use a lower awg cable...good luck..other affordable offerings I have never heard but rate highly...Analysis plus and Kimber cable...both at Audioadvisor.com...with a 30 day trial...