according to stereophile's measurements for your speakers drop like a rock at 80Hz which makes them excellent candidates for subwoofer integration.
the key ingredients for perfect sub integration are as follows-
1) subwoofer with polarity invert switch
2) subwoofer with continuous phase angle adjustment
3) subwoofer with high level (speaker line) inputs
4) subwoofer with flat usable frequency response.
Some REL subs and JL Audio subs have these features / attributes which is why they blend seamlessly with a little work.
I have the JL Audio D110 integrated perfectly with Harbeth C7s and can recommend it for you application.
*inverted polarity switch helps to eliminate peaks in the response through summing.
*continuous phase angle allows fine tuning to completely eliminate any peaks or cancellations by aligning the pulse with the main woofer at the crossover point.
*high level inputs allow better blending because your sub sees the exact same signal your main speakers see. run in parallel to your amps connections- it creates a benign high impedance load to the amplifier.
*a flat useable response is what makes a sub sound musical- being able to play many bass notes and not be a one note wonder.
The JL D110 is an excellent sub at it's price point.
the key ingredients for perfect sub integration are as follows-
1) subwoofer with polarity invert switch
2) subwoofer with continuous phase angle adjustment
3) subwoofer with high level (speaker line) inputs
4) subwoofer with flat usable frequency response.
Some REL subs and JL Audio subs have these features / attributes which is why they blend seamlessly with a little work.
I have the JL Audio D110 integrated perfectly with Harbeth C7s and can recommend it for you application.
*inverted polarity switch helps to eliminate peaks in the response through summing.
*continuous phase angle allows fine tuning to completely eliminate any peaks or cancellations by aligning the pulse with the main woofer at the crossover point.
*high level inputs allow better blending because your sub sees the exact same signal your main speakers see. run in parallel to your amps connections- it creates a benign high impedance load to the amplifier.
*a flat useable response is what makes a sub sound musical- being able to play many bass notes and not be a one note wonder.
The JL D110 is an excellent sub at it's price point.