tuga
Legal Alien
I thought that it might be of interest to cross-post this information about the BBC LS3/6 which I have just posted in the classifieds.
The LS3/6 was the BBC "clone" of Spendor's BC1 (bextrene cone). Spendor then updated this model with the SP1.
Rogers started selling the LS3/6 as the Export Monitor, then updated that model to the Studio 1.
A new version of the BC1/SP1 was launched using new tweeters and a polypropylene cone, the SP1/2. The last version of this speaker to be designed the Hughes' was the SP1/2e from '94. For some years Spendor, under a new ownership and design team, produced the SP1/2 R1 and R2 with new drivers and, judging from these measurements (scroll down to the conclusion), new design brief/standards.
The Spendor Classic 1/2 is a completely different design.
Harbeth's original HL1 was an underperforming single tweeter cousin of the original BC1 which only had one tweeter.
Under a new ownership and design team the company later came up with the Harbeth Super HL5 which uses an identical tweeter configuration and is a much closer relative to the LS3/6(BC1). The SHL5 is part of Harbeth's domestic series which uses "cheaper" metal-dome tweeters; the original non-Plus version had a mistaken has a slightly contoured response (not flat on-axis).
There's more info and photos in Mark Hennessy's (I think that he's a member) website: https://www.markhennessy.co.uk/rogers/others.htm
Family tree:
Spendor BC1(bextrene cone)
BBC LS3/6 & Rogers Export Monitor (bextrene cone)
Spendor SP1 & Rogers Studio 1(bextrene cone)
Spendor SP1/2 (polypropylene cone)
Spendor SP1/2e (polypropylene cone)
Harbeth Super HL5 (radial cone)
Harbeth Super HL5+ (radial cone)
Stirling LS3/6 (polypropylene cone)
The LS3/6 was the BBC "clone" of Spendor's BC1 (bextrene cone). Spendor then updated this model with the SP1.
Rogers started selling the LS3/6 as the Export Monitor, then updated that model to the Studio 1.
A new version of the BC1/SP1 was launched using new tweeters and a polypropylene cone, the SP1/2. The last version of this speaker to be designed the Hughes' was the SP1/2e from '94. For some years Spendor, under a new ownership and design team, produced the SP1/2 R1 and R2 with new drivers and, judging from these measurements (scroll down to the conclusion), new design brief/standards.
The Spendor Classic 1/2 is a completely different design.
Harbeth's original HL1 was an underperforming single tweeter cousin of the original BC1 which only had one tweeter.
Under a new ownership and design team the company later came up with the Harbeth Super HL5 which uses an identical tweeter configuration and is a much closer relative to the LS3/6(BC1). The SHL5 is part of Harbeth's domestic series which uses "cheaper" metal-dome tweeters; the original non-Plus version had a mistaken has a slightly contoured response (not flat on-axis).
There's more info and photos in Mark Hennessy's (I think that he's a member) website: https://www.markhennessy.co.uk/rogers/others.htm
Family tree:
Spendor BC1(bextrene cone)
BBC LS3/6 & Rogers Export Monitor (bextrene cone)
Spendor SP1 & Rogers Studio 1(bextrene cone)
Spendor SP1/2 (polypropylene cone)
Spendor SP1/2e (polypropylene cone)
Harbeth Super HL5 (radial cone)
Harbeth Super HL5+ (radial cone)
Stirling LS3/6 (polypropylene cone)