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Harbeth Models Comparison

Posted by George S. Roland on July 1, 2017 at 10:41:45:
I have been looking into Harbeth speakers lately and am struck at how similar in size and driver complement they are. I am writing currently regarding the C7ES3, Monitor 30.1 and Super HL5 +.

All three of these speakers use a 200mm bass/mid unit and a 25mm ferro fluid cooled tweeter, which I assume are the same drivers. Bass is rated at 45 Hs for the C7ES3, 50 Hz for the Monitor 30.1 and 40 Hz for the Super HL5+, which, I assume is accounted for partly in the deeper bass being found in the larger cabinets. I do realise that the Super HL5+ adds a super tweeter, but all three are rated at +/-3 dB at 20kHz, so I'm not sure what difference the super tweeter makes. (I believe this speaker is a current version of the Spendor BC-1? Kept in the lineup because of that connection?

A dealer told me they all sound noticeably different, so, I would appreciate learning from those experienced with these models, what the sonic differences are?

Many thanks,

George