Impedance and power ratings when using two cabs.

[Nebadon2000]

It's the old chain is only good as weakest link; you still will be limited by 210's ability in SPL, power handling and Sound quality.

The 1x15 should add some volume and depth without stressing 210 and having 210 closer to ear height as mentioned should help hearing oneself and any distortion from to much cranking.

Efficiency can be important also but for 1 time use you should get what you need without problems unless you become inebriated pre and during show
[recipe for blowing stuff up]

The 2x10 with 1x15 IME is to add depth and change overall tone which does come with some added volume sometimes; Having 2x10 and adding 1x12/1x15 with similar power rating and efficiency may be best.

 

[HolmeBass]

I'll try and not reach that point, then... gain and volume at 80% will probably suffice, and I'm pretty sure the overall volume would still be noticeably higher that using the PF-115HE alone...
Thanks!

Unfortunately the power output from your amp cannot be controlled by the gain and master knob positions.

In effect the amplifier multiplies the input signal volume by an amount, a gain factor. So if you increase how loud the input is - even without moving any knobs on your amp - you will increase the amp’s output power.

Fortunately 200 is pretty close to 250 in terms of thermal power ratings for speaker cabinets. So you will probably be ok unless you are playing really, really loudly.

 

[agedhorse]

I think you will find that the thermal limits aren’t the limiting factor.

 

[Lostgallifreyan]

I bought a used Ashdown ABM 1x15 that had a slightly frazzled voice coil, and the seller had no idea till I'd recorded the clean sound of my 4x10 ABM for comparison. The 1x15 sound was nice, like a gentle synth-like fuzz, so I can see why it got overlooked, it wasn't unmusical, but there was no getting rid of it. He was great, paid for a new driver, Ashdown shipped it to me, I fitted it, and it's all good.

Given how hard it is to specify mechanical limits (though I really do think cab makers need to try to, so we get power specs based on that and not thermal driver ratings), my suggestion is to keep the 2x10 and lay in some spare drivers. At least that way you can consider it as 'sacrificial' to some extent. So long as you approach its danger threshold cautiously, the odds are you will never hurt the more expensive and more powerful cab.

(In my case that might not apply though, there's a 250W 1x15, but the 4x10 is rated at 600W, but I'll get by mostly because I like to bias energy toward HF a lot more than most bass players. My 4x10's treble horn might be the first casualty if I got reckless..)