You won't be able to run both outputs into one cab as it'd likely blow it up. Getting 2 x 4ohm cabs looks like your best bet since it's dual channel.
I'm not 100% on this but if you email Guy at Ashdown he can tell you for sure
[url="http://www.ashdownmusic.com/tech/tech_service.asp"]http://www.ashdownmusic.com/tech/tech_service.asp[/url]
Sounds like another GAS victim to me :brow:.
Are you happy with the Zephyr ? If not why not ?
The Squier VM Jazz is a good bass, a decent alternative to a MIM Jazz I believe, whether it's a positive or just a side stepping move I can't tell you.
Your ABM500 combo will only be operating at apx. 300w without an additional cab. Adding an extension cab unlocks the full potential of the head.
The 4x10 or 1x15 (effectively a cab but built into the combo) will be 8ohm. Adding another 8ohm cab will give you the 575w @ 4ohm advertised. The only way you could get the full whack out of the existing combo is by changing the speakers inside.
It is a bit confusing but you'll get used to it .
Added to my watch list for curiosity !
[url="http://cgi.ebay.co.uk/Carvin-V200-vintage-and-rare-80s-bass_W0QQitemZ300195915408QQihZ020QQcategoryZ4713QQssPageNameZWDVWQQrdZ1QQcmdZViewItem"]http://cgi.ebay.co.uk/Carvin-V200-vintage-...1QQcmdZViewItem[/url]
I really like the new neck through BTBs, but the price has gone up significantly (they're about £600). The attraction of them before was the fact they were so cheap and good value.. I expect these ones are fantastic too but at that price they won't shift as many.
...and he still hasn't sold it:
[url="http://cgi.ebay.co.uk/Ashdown-MAG-MONITOR-12-Classic-Bass-Guitar-Amplifier_W0QQitemZ250208349603QQihZ015QQcategoryZ58719QQssPageNameZWDVWQQrdZ1QQcmdZViewItem"]http://cgi.ebay.co.uk/Ashdown-MAG-MONITOR-...1QQcmdZViewItem[/url]
Interesting... this one makes me weak at the knees:
[url="http://www.bachmusik.com/en/p100988/bach-jb-04s-na/"]http://www.bachmusik.com/en/p100988/bach-jb-04s-na/[/url]
And this one must be good value:
[url="http://www.bachmusik.com/en/p100189/bach-pb60mmm/"]http://www.bachmusik.com/en/p100189/bach-pb60mmm/[/url]
Never owned one but have played a fair few of them. Build quality is fantastic and they're also well designed. If it's a good price then go for it - I haven't heard anyone say anything bad about them ever.