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Old 7th May 2011, 01:43 AM   #11
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I had the rogers for last 12 years (that long?) of wich the last 5 or 6 in their boxes
in the loft.

You lot just got me planning to take them out tomorow
not half bad for the money
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Old 7th May 2011, 03:50 AM   #12
DDF is offline DDF  Canada
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I worked with a pair for years, and then inherited a pair of their evolutionary offspring, the JR149. I reworked the JR149 with a scan 9300, far superior tweeter to the original. They were much better sounding when I was done but they're still very modest.

This is a classic example of a good speaker for the time but its been far bettered in even small modern speakers. The B110 woofer is really not a good driver. Its dispersion is very uneven and it has a bad response right through the critical midrange. If it was offered new today, it would not be well regarded.

Don't get me wrong, if you like classic speakers, its a good one. But its like comparing the performance of a 35 year old car with a new one, you can't compare them on performance, or value, only nostalgia and an appreciation of their historical place.
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Old 7th May 2011, 10:32 AM   #13
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If you listen to a lot of speech radio, they are superb. Anything else, and their limitations soon become evident. So unless you spend all day listening to Radio 4, I'd give them a miss.
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Old 7th May 2011, 11:12 AM   #14
sreten is offline sreten  United Kingdom
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Hi,

It depends what you are looking for, but no, they are not as good as people
say they are and complete speakers or suitable parts are way overpriced.

Possibly the pinnacle of small speaker design :
Zaph|Audio - ZD5 - Scan Speak 15W8530K00 and Vifa XT25

On my advice my brother instead bought some original alnico Spendor SA1's.
These are in all respects a lot better and cheaper than the LS3/5A's IMHO.

rgds, sreten.

See : BBC LS3/5a loudspeaker | Stereophile.com for loads of info
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Old 7th May 2011, 11:44 AM   #15
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My late Father, talked about the LS5's, and claimed to be involved with the project whilst working at Goodmans, in Portsmouth in the 70's. My father 'acquired' some of the woofers although which type i have no idea, and built his own bookshelf monitors in a bigger box, approx twice as deep. made his own tweeter dome from a ally pie dish....my dad was a toolmaker prior to working for Goodmans, so he probably turned his own polepiece as well. I grew up listening to these and the LS5's my mother eventually bought, and I prefer his. The LS5's are iconic for good reason. great imaging, mids and highs. sometimes a little congested when you push the 15 Ohms ones, but the tweeter sizzle i dont find THAT apparent. maybe im deaf though Ive yet to build a speaker which I think is superior in regard to imaging, maybe im crap at building speakers though

BUT, i hate the highish Q bass roll off. the driver in a slightly larger box may sound lighter but far better. I just find some kick drums sound HUGE and others sound like all the life has been sucked out of them. I also hate the way a 30 watt amp runs out of steam awful quick with these things and to be honest id never trust them on a bigger amp. Oh and the extremely complex crossover is another thing i hate. The flat response probably contributes to the spacial quality, but the level of filtering needed to tame the drivers....Id still be tempted to revamp my mums LS5's with new components though....
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Old 7th May 2011, 01:28 PM   #16
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mondo, are you talking about LS3/5s or LS5/8s when you say LS5?


PS: Just curiosity, I don't really like any of them all that much.
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Old 7th May 2011, 01:35 PM   #17
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Hello,

FWIW, this gentleman who worked at Speakerlab in Seattle in the 70's chronicles his "American High Fidelity" knock off of the LS3 5/a

Cheers
Terry

A book entitled "Thoughts to my Boys, Alex Orme and Mike Orme": June 2009
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Old 7th May 2011, 02:48 PM   #18
M Gregg is offline M Gregg  United Kingdom
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Quote:
Originally Posted by Parasonic View Post
Hello,

FWIW, this gentleman who worked at Speakerlab in Seattle in the 70's chronicles his "American High Fidelity" knock off of the LS3 5/a

Cheers
Terry

A book entitled "Thoughts to my Boys, Alex Orme and Mike Orme": June 2009
Great bit of nostalgia!
Also the information provided by everyone.

Thank's
M. Gregg
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Old 7th May 2011, 04:43 PM   #19
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Here is the original research paper entitled "The design of the miniature monitoring loudspeaker type LS3/5A" by H.D. Harwood, B.Sc., M.E. Whatton, C.Eng., M.I.E.E. and R.W. MiIIs.

http://downloads.bbc.co.uk/rd/pubs/reports/1976-29.pdf

It is too big (389kb) to attach to this post.

I read somewhere that they are so expensive to build is because of the sophisticated (over-complicated perhaps) crossover.
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Old 7th May 2011, 10:47 PM   #20
sreten is offline sreten  United Kingdom
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Quote:
Originally Posted by mondogenerator View Post
BUT, i hate the highish Q bass roll off. t..
Hi,

Its fundamental to the correct tonal balance of the speaker,
don't want to go into the details in this thread, but it is a
correct design decision in the overall scheme of things,
(given apparent tonal balance overrides transient quality.)

gds, sreten.
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