Strengthen Those Quads! A Review of the Quad 33/303 Pre-Power Combo
/Hello everyone, and welcome to the February blog from Audio T Brighton. This month, we’re looking at ways to strengthen your Quads. Now, I’m not a qualified medical practitioner, but I’m pretty sure this is sound advice (pun intended) for anyone — whether medical or, in this case, audio advice.
The products in question — the Quad 33 preamp and its matching Quad 303 power amp — have been around for a little while. Hot on the heels of listening to the new Quad 3 integrated amp, we recently had the chance to audition the updated version of this retro classic pairing, well known in the 1970s along with other famed products like the Quad ESL57 electrostatic speakers, which, incidentally, also have an up to date version.
Let’s unlock the audio door on this Quad 33/303 pre-power remake and see if it sounds as authentic as it looks.
Quad 33 Preamp
Quad 33 preamp with supplied remote
Before we dive into the audio performance and technicalities of the Quad 33 and Quad 303 system, let’s take a moment to admire the “retro orange” finish that this Quad combo has recreated. It certainly looks the business when lit up.
The retro look, feel, and sound are all the rage at the moment. Although I’m unsure of the origins of this trend, it may have something to do with the resurgence of vinyl playback. Either way, the retro aesthetic certainly gets our approval with regard to the Quad 33 and Quad 303 — it looks very fetching.
Quad 33 rear input/output panel
Running through the specifications of the Quad 33 preamp, the first thing to note is the lack of digital inputs. Personally, we feel this isn’t a disadvantage sonically, as internal digital circuitry often offers input flexibility at a sonic cost. It is very difficult to shield against noise ingress between digital and analogue circuits, with the most effective remedy often being physical distance between components, owing to the inverse square law. The distance between components and circuitry inside the Quad 33 is naturally limited due to its compact size.
If you require digital inputs, you could instead consider one of Quad’s sibling setups — the more affordable Quad 3 integrated or the premium integrated amplifier, the Quad Platina. Better still, an external DAC partnered with the Quad 33/303 would be an excellent solution.
The flip side of the reduced digital connectivity on the Quad 33/303 combo is the inclusion of both MM and MC phono stages, along with balanced connections.
The Quad 33 preamp retains much of the functionality of the Quad 3 integrated. In particular, Quad’s use of the Tilt tone control remains an interesting and distinctive implementation. I’ve written about the Quad 3 and the Tilt function at length in a previous blog.
For full details on the Quad 33 preamp, you can visit the Quad website.
quad 3 integrated underneath the quad 33/303 combo
Quad 303 Power Amplifier
A perfect partner for the Quad 33 preamp, the Quad 303 power amplifier is rated at 50W per channel into 8 ohms and a healthy 70W per channel into 4 ohms. While fairly faithful to the original design, newer components and refinements have allowed the current model to be far more resilient when driving challenging speaker loads, with up to 10 amps on tap if needed.
When running a pair of Quad 303s, an additional feature is the ability to operate them in bridged mono-block mode via a rear-panel switch. A bridged pair can deliver 140W into 8 ohms (170W into 4 ohms), providing greater ease and authority with less sensitive speakers.
For more detailed information on the Quad 303, please refer to the Quad website.
So, How Did the Pairing Sound?
It is fairly apparent — at least to our ears — that the design remit of the Quad 33/303 stays very close to the spirit of the original 1970s models. This makes complete sense, especially when authenticity is the goal, not just visually but sonically as well.
The Quad 33/303 pre-power combo delivers what we would describe as an easy-going, good-natured sound. Unsurprisingly, given their shared design and manufacturing heritage under IAG, the pairing worked beautifully with our Wharfedale Lintons. The result was hours of unfatiguing listening, without over-emphasising detail or introducing the digital glare that can sometimes creep into modern recordings.
Not all amplifiers manage this at this price point, with some systems having a tendency to shout, “Here I am!” If a more laid-back presentation isn’t your preference and you want something with a bit more energy, the Quads also paired well with our Neat Petite Classics, which extracted extra zest and liveliness from recordings.
To conclude, the Quad 33 preamp and Quad 303 power amp represent a gorgeous rendition of a 1970s classic, both visually and sonically. They come highly recommended, particularly when properly matched within a system. As always, we strongly encourage customers to listen before buying, as component synergy remains critical to building a long-lasting and satisfying system.
As the saying goes, the proof of the pudding is in the eating — so get in touch to book a demonstration and hear them for yourself.
Thanks for reading.
Adey, Jake, Kevin and Paul - Audio T Brighton
If you’ve enjoyed this, why not go ahead and read some more of our other blogs, and be sure to follow us on our social media channels below…
Quad can be found at the following Audio T stores
Wharfedale can be found at the following Audio T stores
Neat Acoustics can be found at the following Audio T stores

