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![]() "Rogers delivers Acoustic Gold." 4.5 Star Rating: Following a successful What Hi-Fi? debut with the GS5s in October, Rogers' Gold Series takes its next steps up the loudspeaker ladder with the GS6s. These are three-way designs, adding a second 12.5cm polypropylene cone, housed in its own chamber and vented via a large port at the front. The aim is greater bass extension without losing the inherent clarity with which the GS5s are blessed. To that end, the GS6s are a great success, exhibiting many of Rogers' traditional, much-admired attributes -- articulate expression, unforced realism, a sense of refinement and poise. Treble detail from their 19mm silk dome tweeters is sufficient to give the listener fine insight into acoustics and instrumental timbre, while bass goes deep yet avoids the over-emphasised boom suffered by many competitors. Play the last moments of Elgar's First Symphony and the Rogers capture its climactic scale with biting, rasping brass and deep, pounding timpani. Their soundstage depth and midrange coherence paint a vivid picture of vocal music, giving Kristin Hersh's Your Ghost terrific foregound vocal presence, amid crystal clear guitar and deep, distant percussion. With more urgent rock and dance music the GS6s come a little unstuck, The Verve's Urban Hymns sounding more congested and less emotive than it should, and the Wired dance compilation failing to rock the room. The GS6s remain clear and articulate, but don't affect your pulse. Driving the GS6s is easy thanks to 90dB/W/m sensitivity and impedance of 8ohms, but they're best matched with amps that match their articulate air. With Marantz's PM-66 KI-S for example, few floorstanders under £500 provide such a balanced sound for acoustic and classical music. | ||
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The Inner Ear Report
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Model LS 3/5a and It all began when Jim Rogers established the company in 1947. His designs quickly established a reputation for combining technical competence with rich and warm natural sound and, in the process, set a precedent for British audio worldwide. Rogers established what became known as "the British sound" here in North America. In the early seventies, Rogers was commissioned by the BBC to produce the industry-renowned LS3/5a and to date, over 50,000 pairs have been manufactured. Other collaborations followed, creating a range of products that have become standard equipment in recording studios around the world. Little has changed over the years when it comes to the LS3/5a. |
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Appearance:
Technology:
Few manufacturers list distortion figures as they tend to be quite high with most loudspeakers. However, there are impressive specs for the LS3/5a less than 3% (2nd and 3rd) harmonic distortion at 90dB S.P.L (from 65Hz~20KHz). An unusually high impedance of 11 ohms is quoted for the LS3/5a. The sensitivity is 82.5dB S.P.L with max. output at 2m of 95dB. Rogers recommends amplifiers rated from 25 to 100 watts. However, we found that amps rated from 50 to over 100 watts/channel do better justice to these monitors. The subwoofer, the AB1, is a passive sub-bass, designed specifically to augment the performance of the LS3/5a and is sold in pairs. The cabinet is constructed with customary care, featuring 18mm damped medite. A single midrange/woofer covers the frequencies from 55 to 120Hz (+/- 3dB). Divided by a second-order crossover at 120Hz, the system impedance is 8 ohms nominal, with a sensitivity rating of 82dB. The entire system can be connected with single wiring or, if you choose, bi-wiring.
The Sound:
Synopsis & Commentary:
The main speakers are 12 inches high, 7.5 inches wide and 6.75 inches deep and weigh 12 pounds each. The matching bass cabinets offer identical footprints and stand 23.5 inches high including the (included) bases. These bases hold the bass enclosures and "spike" them to the floor. Although there are connecting screws to bolt the enclosures together, we used Blue Tack between the enclosures to stack the two cabinets without implanting cabinet resonances to the assembly. When the bass enclosure and the main loudspeakers are stacked together, they stand 35.5 inches high and offer the appearance of small "towers" with tiny footprints mini-monitors which can be placed in the smallest of rooms.
The LS3/5a is a two-way air suspension system operating in a damped, braced birch cabinet which reduces resonances and optimizes conditions for the drivers. The bass/midrange driver is a 5 inch Kef B110. The tweeter is a KEF T27 1.5 inch unit. Both are computer selected and graded. The crossover is also made by KEF the BBC FL 6/38~2128 a 26 elements computer-tested network. Frequency response is quoted from 70Hz to 20KHz (+/- 3dB).
We connected the Rogers to a Polyfusion 960 amplifier at 200 watts, a Bryston 8B strapped to deliver 400 watts, a Copland amplifier rated at 100 watts and the integrated amplifier from Audio Refinement rated at 50 watts. A Copland CD player and an Alchemist CD/DAC served as source components. Interconnects and speaker cables were by Straightwire and Nordost Flatline. Our auditioning material ranged from blues to classical music to determine the Rogers' ability to handle different program material. The Rogers sounded best with the Polyfusion amplifier, followed closely by the Bryston, the Audio Refinement and the Copland. However, the LS3/5a's personality came through with all amps. Indeed, the sonic character can be described as uniquely Rogers. The LS3/5as deliver refined and sophisticated high frequency information in line with the best and most expensive loudspeakers to which we have listened. With all musical material, these speakers sparked our panelists' recognition of smooth sound and total absence of irritating properties. This attribute continued in the midrange regions and manifested itself as an effortless and balanced flow of musical data. Sometimes, this distinction often results in slight masking of important inner detail; but not with the LS3/5a. It is difficult to explain that "smoothness" of sound doesn't always represent accuracy, but rather, it should describe an attribute. When this attribute (smoothness) is coupled with a loudspeaker's revealing quality (there aren't a lot of loudspeakers that can handle this combination) the results are stunning. The Rogers offer sophisticated sound, as well as enlightening inner details information under all kinds of conditions. Bass information is robust down to the specified 55Hz. There is enough energy below 55Hz, but definition is limited. Resolving deep bass (an organ's pedal notes for example) can't be achieved in its entirety with the sub and satellite speakers. However, there is enough determination in the bass that the missing resolution doesn't distract from the Rogers' outstanding musical presentation. Then there is the imagery. The LS3/5as render an outstanding multi-dimensional image with well defined boundaries, excellent focus on instrument and voices and exemplary front-to-back layering. It's possible to count the rows of musicians when listening to large orchestration. There is only one thing the Rogers can't or won't do they'll not sound great with heavy metal or rap music.
The LS3/5as' original design set a benchmark and, according to our Editor, were the model for what developed into the British sound perpetuated by firms like Spendor, Kef, Celestion and many other British manufacturers. In the mid seventies, most of the better retailers offered a good mix of the American east and west coast sound. East coast included the Advents, Acoustic Research, KLH and later on EPI. The west coast sound was best represented by firms such as JBL and Altec Lansing. The British sound, however, was always regarded as the most sophisticated and the leading hi-end loudspeakers from England invariably included the Rogers brand. Over the years, the LS3/5a has been updated, resulting in better all-round definition, better resolving caliber and, with the help of the AB1 subwoofer, richer, more full-bodied sound. One of our panelists said that the sound of the LS3/5as was exactly what he had been looking for. He bought a pair and connected them to his Celeste amplifier which seems to be a match made in audio heaven. We suggest that you audition these fine British loudspeakers with upscale electronics solid state or vacuum tube rated at about 50 watts to get the best results. Use upscale cables and good quality source components and listen to these babies sing.