Goldmund Prologos Wireless MKII
Never heard of Goldmund? It’s a 40-year-old ultra high-end Swiss brand with a product range that makes the likes of Mark Levinson and Krell seem positively mass market.
The company’s aim is to build the best hi-fi and AV equipment possible, and it makes a surprisingly wide range of products – CD players, AV processors, DACS, amplifiers and, of course, speakers are all on the menu. As the middle-rung Prologos Wireless MKII’S hefty price shows, the company isn’t afraid to charge handsomely, either.
The term ‘wireless speaker’ may conjure up the image of a small, portable unit for most people, but here Goldmund applies it to a pair of chunky 50cm tall standmounters. Once mounted into their distinctive frame stands, the complete assembly makes for an imposing sight, though the clean design makes them look classy rather than fussy.
The Prologos Wirelesses are an active two-way design with twin 18cm mid/bass drivers and a 25mm soft-dome tweeter per channel. The company doesn’t manufacture its own drive units, but instead has them custom made to very close tolerances by well-regarded OEM suppliers.
The tweeter is Scanspeak’s rangetopping Illuminator soft dome, while the Audiotechnology mid/bass driver uses a sandwich cone with an expanded foam core. This complex mid/bass construction helps to deliver a rigid and relatively light, but still well damped, diaphragm.
Electronic brainpower
Each speaker enclosure houses a pair of 175W power amplifier modules – one for the tweeter, the other for the mid/bass drivers. But the Prologos are way more sophisticated than most active speakers we come across.
They also pack enough electronic brainpower to process a range of proprietary software that’s designed to ensure their acoustic output is as even and phase linear as possible. Goldmund has been developing this software for years, and it’s a major part of what makes these speakers so different from any rival we’ve come across.
Even the stands are unusual. These work more like bicycle stabilisers than a typical support. The speaker’s weight is supported by a metal pole attached to the underside of the aluminium cabinet. This takes the vibration energy generated by the drive units and dissipates it into the ground. The frame stand is just there to make sure the speakers don’t topple over.
The idea is to make the cabinet as inert as possible, and this technique certainly seems to work – there’s very little vibration felt on the enclosure, even during
expensive, but they also have the luxury aura to match their price.
There are two ways to get a signal into the Prologos. You can use them with one of the company’s controllers – we were loaned the entry-level Mimesis 11 (if you can describe something worth £10,250 as ‘entry-level’), which is a digital preamp with a wireless transmitter built-in – or use the supplied wireless USB dongle and plug it into a computer.
The wireless tech is a proprietary system developed by Goldmund and Texas Instruments specifically for transmitting digital audio. It operates on the 2.4GHZ band and is limited to four channels at 16-bit/48khz. If you want to play back higher-resolution source material, you’ll have to go wired. If you do go down this route, you can daisy chain the speakers or connect each directly to the controller.
These speakers are surprisingly unfussy when it comes to placement. We start with them in the same slightly angled free-space position favoured by our reference ATC SCM50S and feel no need to move them – the tonal balance is impressively even and stereo imaging as expansive as we could wish for.
We compare the wired and wireless connections using CD spec files and find, rather surprisingly, that we edge towards
“These Prologos are undeniably expensive, but they also have the luxury aura to match their price”
the sound of the cable-free option. It is a little more lively and open, even though it loses out just a touch in focus and subtlety in the process. We compare the sound of the USB dongle with that of our laptop feeding to Memisis 11 and (as expected, considering the price of the unit) come out in favour of the dedicated digital hub. The sonic results are just more solid and composed. There’s also the ability to play a range of sources and the use of a dedicated remote handset.
Warming to the task
Once properly warmed (our review Goldmunds are well-used demo units so don’t require the usual running-in period), it doesn’t take long to realise that these are outstanding performers. We start with Beethoven’s Fifth
Symphony and the first words that come to mind are clarity and detail resolution. The Prologos’ sound is just so revealing; every note and sound is cleanly reproduced and brushed up for inspection. When it comes to outright analysis, we can’t think of an alternative that does better.
Tonally they’re impressively even and seamless. The balance may be on the slightly lean side of neutral, but there is enough authority in the presentation to convince. It’s clear that the proprietary DSP works well and the drive units integrate superbly. No part of the frequency range sticks out, leaving the presentation as cohesive as we’ve heard from multi-way box-shaped speakers.
By high-end standards these speakers may be relatively small, but the Prologos can go surprisingly loud. The company claims an impressive maximum sound pressure level of 120db, which is more than enough to fill all but the largest of rooms.
Their dynamic reach is equally impressive, allowing them to render large-scale shifts with considerable composure. There’s little sense of hardening up at high volumes and, just as pleasingly, little change of sonic character when pushed hard.
We’re really impressed with the stereo imaging too. It’s a wonderfully stable and expansive presentation as the speakers layer their spacious soundstage with care and confidence.
With eyes closed, it is hard to pinpoint the exact position of the Prologos, which points to quiet cabinets and good dispersion characteristics.
We play Kate Bush’s Hounds Of Love and the Goldmunds continue to excel. With Running Up That Hill, they convey the song’s drama and momentum superbly. There’s plenty of punch and attack, yet also the refinement to stop things getting out of hand. Their wonderfully expressive midrange comes to the fore, communicating Bush’s voice with the finesse and passion it deserves.
Despite the dense production, every instrumental strand remains easy to follow. When partnered properly and set up with care, these speakers never sound the least bit clinical. While they are astonishingly revealing, they still manage to sound spellbindingly musical with most recordings.
They don’t hide things though, and poor recordings are ruthlessly exposed. If your music collection is packed with low-resolution files, these won’t sweeten or fudge things one bit.
No sacrifice
A spin of Massive Attack’s Paradise Circus shows that the Prologos can deliver lows with weight and authority. We’re impressed with the agility of the bass and the speakers’ talent for rhythmic precision. In most small- or medium-sized rooms, these standmounters deliver all the low-end power most people will ever need.
Wireless technology has always had an uneasy relationship with quality hi-fi. While the budget end of the speaker market is swimming in portable offerings, the top end has been far more resistant to the technology’s charms. The Prologos prove that wireless can work well at the highest levels without sacrificing performance.
All it takes is obsessive engineering, software genius and a massive budget.
”By high-end standards, these speakers are relatively small, but the Prologos can go loud enough to fill all but the largest of rooms”