Ashdown's Dual Tube/Spyder series

[Pow_22]

So, i was selling my ABM 400 with the idea of going to a combo but a Spyder 330 came up locally at a decent price and peaked my memories of one i had years back.  Now, these things are pretty quiet for supposed 300w at 4ohms - my ABM 400 is MILES louder but the core tone is lovely.  A bit of a one trick pony with no much in the way of EQ but lovely nonetheless.  I remember years ago i did a bit of valve swapping in my 550 combo and to be fair it did make quite a difference (better or worse is subjective).  Was wondering if any members on here are regular spyder users - either the 550 or 330 - and has done any valve swapping?  The pre in these is designed to be clean and warm rather than providing much in the way of grit but im sure ive read people who put different 12ax7's in to coax a little more growl out of them.

Edited February 13 by Pow_22

[Pow_22]

Just to update.  We had our first rehearsal with the spyder last night.  Played a groundwound loaded Jazz bass into an Eden 4x10.  I was worried at how much quieter the spyder seemed at home playing than my ABM400.  However, once i had my sound dialed in - none of the shift buttons engaged, bass and treble boosted slightly and mids rolled off a little - and the jazz to 100% neck pickup, 25% bridge pickup and tone rolled off a little bit, it was glorious.  Ive set the amp with the gain at around 75% and the volume at 12 oclock and it was nice, even, slightly growly and very beefy.  Currently in its belly is a Tung Sol 12AX7 in v1 and a Sovtek 12AX7B in V2.  As mentioned before these dont really do full on grit even with the gain maxed but it does have a lovely warm sound and IMHO a much clearer tone than the ABM