Andyman,
Here's the specs on your 3i's in case you don't have them. You have to go back in time to Monitor Audio's website on the Wayback Machine to see them:
http://web.archive.org/web/20011226151925/http://monitoraudiousa.com/products/silver/index.html
Silver 3i
The bookshelf of the Silver Series, the Silver 3 employ the same proprietary gold dome tweeter as the other members of the Silver family, providing for total delicacy in the high frequencies.
Though delicate, these musical tweeters are fast and accurate. With 1st and second order break-up well above 28kHz, you'll never hear the ring and distortion associated with other metal dome tweeters.
This versatile speaker also features the newly developed 5 1/4" bass-mid driver mounted in a front ported cabinet for in-cabinet or near wall installation.
The Silver 3 offers all the attributes and merits of a true British hi end speaker system at a fraction of the cost, and has been designed to maximize your Home Theater as fronts, rears effects or both. As a great added benefit, when you turn off the video, the Silver 3 transform into an audiophile grade loudspeakers with all of the depth and out of box imaging of speakers much more expensive.
5 1/4" Bass/ midrange driver
Precision glass re-enforced nylon chassis
C-CAM (Coated Ceramic Aluminum Magnesium) Cone
1" C-CAM Gold dome tweeter
Bi-wireable, gold plated terminals
Compact size
Front Ported design
Optimized for free field or boundary positioning
2-way system
Specifications:
Frequency Response * 45Hz - 25KHz + 3dB
Sensitivity (1W@1M) 88dB
Maximum SPL (per pair) 107dB
Nominal Impedance 8 ohms
Power Handling 100 Watts RMS / 150 peak
Recommended Amplifier 30 - 150 Watts
Cabinet Alignment Front Ported
Dimensions inches (H x W x D) 15 3/4 x 8 x 8
Weight Each 13 lbs
Finishes (Real wood book matched Veneer) Natural Cherry, Rose Mahogany, Black Oak
* Measured in IEC listening room (77CuM)