Cambridge Audio Duo (Graphite)

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£249 .95
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Cambridge Audio Duo (Graphite) is rated 4.9 out of 5 by 49.
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Cambridge Audio Duo (Graphite)

MM/MC Phono Preamplifier/Headphone Amp
£249 .95
Buy online/in-store/Telesales
Compare (3 max)

Other ways to buy

Order with your local store

We’re here for you 7 days a week!

  • Order in-store or by phone
  • Arrange home delivery from warehouse
  • Provide our expert advice
  • Video calls
  • Add to basket and Click & Collect from our stores with a pick-up slot

Use our Store Finder to find your local store. Please call ahead to check stock.

6 Year Guarantee

£24.95 - Fully refundable if unused.

Add our 6 Year Guarantee to your basket when you check out. We'll cover your items for 6 years
and give you your money back if unused.

Fully refundable if unused

6 Year Guarantee costs just £9.99 on all items under £100, or 10% of purchase
price on anything over £100.

We think you'll agree our 6 Year Guarantee offers fantastic value. What's more, if you don't use it
in the 6-year period, we'll refund the cost of it. You really can't say fairer than that!

Plus, if we can't fix a fault, we will give you a replacement.

Find out full details here.

Buy now, pay later available in-store or by phone, on items over £500

We offer 6 and 10-month options.

Call your local store or our telesales team for details

For purchases over £500, you can settle the balance in 6 months, and in 10 months on purchases over £1000 and pay no interest whatsoever. If you settle part of your loan in the deferral period you won’t pay interest on that part. You can still pay off the loan sooner if you make additional payments. If you’d rather spread the cost over 36 months, you can set up a loan repayment plan when the payment-free period comes to an end at 19.9% APR representative. 19.9% interest. A one-off settlement fee of £29 will be applied. Subject to application, financial circumstances and borrowing history. Ts&Cs apply. Richer Sounds Limited acts as a credit broker and not the lender. Barclays Partner Finance acts as the lender. Click for eligibility criteria or to Find out more.

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All products that are available to purchase on the Richer Sounds website can be delivered free to blind, partially sighted or those with a disability. Find out more

Please contact web after sales for more info.
For delivery of in-store only deals, please contact your local store for more details.
Ts&Cs apply - see our delivery page.

Disabled assistance

All products that are available to purchase on the Richer Sounds website can be delivered free to blind, partially sighted or those with a disability. Find out more

Please contact web after sales for more info.
For delivery of in-store only deals, please contact your local store for more details.
Ts&Cs apply - see our delivery page.
Compare (3 max)
”Rarely does Cambridge fire too wide of the mark, but the Duo hits right at the centre of the target.”– ‘What Hi-Fi’ – 5 Star review.

Quality headphone amp

If you want to hear every nuance and background detail of your favourite music then listening with headphones takes some beating. Use the dedicated headphone amp built into the Duo and you’ll experience a whole new level of detail. With a precise volume control you’ll get exactly the right level – whatever your choice of headphones.

Perfect for amps without a phono preamp built-in
Many amplifiers no longer come with a built-in phono preamp, which is fine if you don’t use vinyl but not so good if you want to spin some records. The Cambridge Audio Duo is a dedicated phono preamp, meaning you can add a record deck to just about any amp or system with a standard AUX input. This means your choice of stereo amp or receiver is greatly expanded and, of course, you can retain the Duo phono preamp if you upgrade your main amp.

Perfect for amps with a phono preamp built-in!
Even if your main amplifier already has a phono preamp built-in, the chances are that the one inside the Duo is considerably better. Using a dedicated, switch mode power supply, the Duo is far quieter than most built-in phono preamps. The revised circuit board layout with surface-mount components further reduces noise and distortion. Factor in the shielded casing and you’ll simply hear more music and less background noise.

MC cartridge compatibility
One of the biggest advances over its little brother, the Solo, is the ability to amplify MC (Moving Coil) cartridges. These have an even lower output than MM (Moving Magnet) cartridges and require dedicated amplification. Once correctly amplified, the sound quality is stunning with a smoother yet more detailed sound. If you're serious about vinyl then fitting a good quality MC cartridge is an upgrade that you won’t regret.

Subsonic filter
Not all records are pressed the same – due to the poor quality of vinyl used, some sound considerably nosier than others. Wear and tear can play its role in reducing the quality, too. With its subsonic filter, the Duo filters out low frequency rumble; reducing distortion and protecting your speakers’ woofers from excessive wear.

Give your system a double whammy upgrade, with the Cambridge Audio Duo.
Rated 5 out of 5 by from Cambridge Audio Duo - Exceeded Expectations I've been suffering with a poor pre-amp for years, so it is with no hint of exaggeration that the addition to my set-up of the Cambridge Audio Duo really transformed my listening experience. It's absolutely fantastic. There's no background noise, and the depth it gives to the sound is wonderful.
Date published: 2020-12-25
Rated 5 out of 5 by from Superb phono stage I bought this based on Noel Keywood’s review. I have to say it is superb for the asking price. A good deal from the Plymouth store. I use a Ortofon MC and it shows it’s qualities. Solid bottom end, great detailing. I use a LP12 and Naim Supernait and I don’t feel the need to upgrade further. I reckon you’d have to spend five fold of what the Duo costs for a worthwhile improvement...a bargain, high quality phono stage.
Date published: 2020-12-13
Rated 5 out of 5 by from Impressive sound, strong build quality Flawless, looks really nice too. Works well with pro-ject turntable
Date published: 2020-12-03
Rated 5 out of 5 by from Great sound I bought MS10 speakers as I wanted some small speakers with a big sound on a budget. They have surpassed my expectations and I am very much enjoying them!
Date published: 2020-12-02
Rated 5 out of 5 by from Excellent Phono pre-amp with a headphone socket Purchased recently to drive a new pair of Accoustic Electric AE1 Active speakers, replacing an old but excellent Naim and Linn system I'd had for years but sadly no longer have space for. The MC circuit works really nicely, and the inclusion of the headphone jack is a real bonus. My only, really minor, niggle is that the volume knob only operates the headphone and not the RCA output. I can use the volume controls on the speakers, but as there is one on the back of each it's slightly less convenient. Of course a lot of active speakers have a remote including a volume control in which case that wouldn't be a problem (and I knew of it before my purchase).
Date published: 2020-11-25
Rated 5 out of 5 by from Great all round I bought this a few weeks ago, and could not be happier, it has rejuvenated the sounds off my albums, listening through phones, I'm hearing stuff that I never heard on my collection
Date published: 2020-10-11
Rated 5 out of 5 by from Excellent sound. I recently bought this phono pre-amp and it’s made a huge difference to the sound of my vinyl collection, everything is so clear and sound quality is excellent. This also works amazingly with headphones, just plug them in, sit back and listen. I’m so pleased with this purchase.
Date published: 2020-08-28
Rated 5 out of 5 by from Excellent quality and sound had the cambridge duo a week but on the very first listen it was a massive sound upgrade on the good cambridge azure 640p it replaced and was a first step on a planned system upgrade, absolute bargain & sound to match. Did'nt need the headphone facility but tried it out & it Did'nt quite match the one in my current audiiolab but not a negative & still up tothe job if you need it.
Date published: 2020-08-03
Rated 5 out of 5 by from Match made in heaven I bought this phon pre-amp to replace an aged three box NVA (high quality in its day). I run a high quality turntable set up (LinnLP12 and moving coil) The Linn has never sounded this good. Setting up was a breeze. I enabled moving coil playback through Cambridge's own Duo and the Ittok AT OC9 combination worked as if it were a custom build costing a great deal of money. Smooth detailed power with that foot tapping bass so renowned by Linn aficionados. This is a first rate pre-amplifier for £250. I am very pleased.
Date published: 2020-05-10
Rated 5 out of 5 by from Simply a quality product Had for a few weeks and works perfectly with my current set up, headphone amp is a brilliant addition.
Date published: 2020-04-25
Rated 5 out of 5 by from Great all round package Stylish and easy to setup, with clear instructions on how to set up. A perfect partner for any quality set up
Date published: 2020-03-16
Rated 5 out of 5 by from Great improvement to my old phono! I have a Revolver turntable which I bought over 30 years ago. Prior to connecting the Cambridge Audio Duo I was getting a lot of 'crackling' static from my records. Since connecting the Cambridge Audio Duo the 'crackling' has decreased and the quality of the sound has improved. The main reason I bought this was because of the headphone socket (I also have a Cyrus II which is about 20 years old and doesn't have a headphone socket!), which in itself is worth it - I love my Cyrus and didn't want to replace it - but there was the added bonus that it also improved the quality of the sound. The staff were really good and very helpful and knowledgeable - I will definitely be going there again!
Date published: 2020-03-02
Rated 4 out of 5 by from Fantastic bit of kit but.... So after trawling through online stores for tube pre amps, and failing miserably to find a good one, I decided to go for the Cambridge Audio Duo. Why? Because it had great reviews, and even friends had commented on how good this unit is. It performs flawlessly with my Denon DL110 MC cartridge. My only gripe with this unit, and you may or may not agree with me, is that if like me, you frequently swap cartridges from MC to MM, then you have to Physically swap the RCA inputs on the back of the unit, and then switch the input on the front. It would make much better sense to have one single input on the rear, with a switchable mode on the front. That’s the only down fall to this otherwise near perfect pre-amp. Hence the four star rating. If you can cope with having to swap inputs over, or you really don’t need to, then I have no hesitation in recommending this little beauty. Well worth the price tag.
Date published: 2020-03-02
Rated 5 out of 5 by from Clear detailed sound with very low noise floor! I was looking for a fairly affordable phono stage that still gives great results. And all the internet hype led me to the Schiit Mani. A solid perfomer for sure, but plagued by constant issues of RFI, constant hum/ buzz and all of that with a high quality linear power supply... My turntable doesn't provide a ground point as its internally grounded, that might have played some part in the whole experience as I can't connect a ground wire from the tt to the phono preamp. So I kept looking for a new phono preamp, something that still has the nice level of detail and dynamics of the Schiit Mani but is also quiet until I drop the needle on the record. And sure enough the Cambirdge Audio Duo is it, and then some! I was hesitant to go for this model as there's not many reviews on the web, but it was the right choice. Bass is as punchy and deep as you'd want it to be, very detailed and quick. Mid-range has plenty of air, with precise instrument separation and placement. The highs are energetic but not fatiguing and the whole sound is very dynamic, overall amazing. At first I wasn't sure on its sound versus the Schiit Mani as it seemed a bit laid back, too mellow. Few weeks of breaking it in and now its just as enjoyable as the Mani if not more! This is a truly audiophile designed equipment, it doesn't add any coloration to your music, just lets it sound its best. The best thing about it... noise floor is incredibly low! Only the slightest buzz at the volume levels I will go deaf at and only if I put my ear right against the speaker, otherwise black silence until the record starts. An extra bonus is that it supports MC cartridges if I ever upgrade, oh yes and a very decent headphone amplifier! Highly recommended phono stage!
Date published: 2020-01-23
Rated 5 out of 5 by from Small box smooth detailed sound I was looking for a bargain and found one 5 stars at £250. I paid £200. The improvement to the sound quality I was use to was unbelievable my main reason for this phono stage was being able to plug it into the auxiliary on my valve amp and the ability to put a moving coil cartridge on in the future at a budget price. Do not wait buy one today. P s it dose not sound like it's budget price.
Date published: 2020-01-22
Rated 5 out of 5 by from Superb for the money Shop responded very well, delivery was well on target
Date published: 2020-01-22
Rated 5 out of 5 by from So pleased. I was reasonably happy with a cheapish preamp for my aged Rega Planar 3 deck but listening with headphones was complicated with my set up. I decided on the Cambridge Duo primarily for the headphone amp rather than add yet another plug for a separate headphone amp and the existing preamp. I am so pleased I chose the Duo even though the price was a bit high for my budget. My vinyl has gained a new life, so much more detail and range. Listening with headphones is wonderful. A very neutral (bass v treble) and detailed experience. Sadly it has exposed the weakness of the rest of my system and I now need to review my main amp and speakers HiFi is a dreadful disease!!
Date published: 2019-12-28
Rated 5 out of 5 by from Expansive soundstage, great detail ... buy one! This is one of those purchases that I wish I’d made ages ago.. lifted the sound of my turntable to dizzying new heights... beautiful, wide soundstage, exquisite timing and drags detail I’ve not heard before out of my records. Add to this I ordered online the Sunday before Christmas (Preston didn’t have one in stock) and it was here at 10.30am the next day.
Date published: 2019-12-23
Rated 5 out of 5 by from Enjoying vinyl again with a great pre amp. I bough this a few weeks ago on the advice of the instore staff at Swiss Cottage who were very knowledgeable and helpful. It's definitely given my vinyl a boost. Loving it!
Date published: 2019-08-13
Rated 5 out of 5 by from Great piece of kit Recently purchased this as an upgrade from the old Cambridge Audio 640p (which I was also very impressed by) and it sounds fantastic! A lot more open and precise the the previous model and my partner loves the fact it has a dedicated headphone output. Just need to save my pocket money for a high end set of headphones! Many thanks to Steve in the Reading branch for his help and the cup of tea
Date published: 2019-08-04
Rated 5 out of 5 by from Pre amp I went in and got a Cambridge preamp they seemed very helpfull I have used these guys a few times
Date published: 2019-07-17
Rated 5 out of 5 by from An great upgrade A great upgrade over my CA Solo. Using with the Reloop 5 turntable. Very please. Thanks RS Southampton for the advice.
Date published: 2019-06-10
Rated 5 out of 5 by from Great amp. Lifts the records plus a headphone amp Flew in from Denmark to pick up this amp after a short correspondence with the shop. The Duo really lifts my records more than the previous amp and has the added bonus of a headphone amp. Looks very stylish also.
Date published: 2019-05-16
Rated 5 out of 5 by from Cambridge DUO This is the second unit I bought from Richer Sounds at Swiss Cottage. The first one got " borrowed " by my son 12 month ago and didn't make its way back since !!! A no brainer at this price point and with this features. Just look inside and see the quality you get. The sound is hard ( if not impossible) to beat at this point. You might get better if you go north of £1200 the DUO is that good !!! Invest your £££ into a good MC cartridge and start spinning and enjoying vinyl. All said and if I had to buy another one I would. Highly recommended. Well and the guys in the shop are great and know there stuff. Longstanding RS Customer
Date published: 2019-05-14
Rated 5 out of 5 by from Magic box I bought this to replace a cheap starter preamp. Wow, I wasn't expecting such a big difference. Not only is my vinyl sounding better but it sounds much cleaner. Many of the blemishes have been filtered out.
Date published: 2019-05-08
Rated 4 out of 5 by from Sounds good Nice well built little unit. Used the moving magnet stage with two turntables, one with a Ortifon OM-10 and the other and OM-5e - sounded great on both but only marginally more revealing than the phono stage built into my Yamaha-RX-A3030 av amp on the former, and built into the latter Project VT-E turntable. The B&W DM602 S3 speakers in the 3030 setup may be limiting the improvement evident and I plan to compare against roksan kandy stage with kef LS50s i have in my studio when I have more time. Not tried the moving coil stage but this is an option unavailable on any other phono preamp in my possession and may be useful one day. The headphone amp sounds great. No complaints re sound with B&W p7's, however, as the P7's are very easy to drive and yet I still have the volume knob turned high, I suspect this headphone amp will sound under powered with certain headphones and would recommend demoing with low sensitivity models. Anyway, no complaints but has not knocked my socks off. Perhaps it would if other limiting factors were addressed but difficult to judge until i try with the LS50s.
Date published: 2019-05-03
Rated 5 out of 5 by from Compact but great sound I purchased this primarily as a Headphone amp, with the preamp ready for when I upgrade to amp and speakers. I am using Grado SR125 headphones and the sound from the Duo is clear and spacious.
Date published: 2019-03-30
Rated 5 out of 5 by from Great example of a well rounded Pre amp Wanted something that could really lift my technics 1700 as well as give me upgrade options for my stylus setup long term. Well worth the money for the quality build and performance
Date published: 2019-03-30
Rated 5 out of 5 by from Old deck and vinyl have comae alive My old deck and vinyl have comae alive! Not sure what else to say, fantastic! I bought this as it integrates into my CA Amp fantastically
Date published: 2019-03-19
Rated 5 out of 5 by from Perfect addition to my system I bought this pre-amp to complement my turntable and revive my vinyl collection. I love it’s simplicity. The sound is superb
Date published: 2019-03-18
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6 Year Guarantee

£24.95 - Fully refundable if unused.

Add our 6 Year Guarantee to your basket when you check out. We'll cover your items for 6 years
and give you your money back if unused.

Fully refundable if unused

6 Year Guarantee costs just £9.99 on all items under £100, or 10% of purchase
price on anything over £100.

We think you'll agree our 6 Year Guarantee offers fantastic value. What's more, if you don't use it
in the 6-year period, we'll refund the cost of it. You really can't say fairer than that!

Plus, if we can't fix a fault, we will give you a replacement.

Find out full details here.

Buy now, pay later available in-store or by phone, on items over £500

We offer 6 and 10-month options.

Call your local store or our telesales team for details

For purchases over £500, you can settle the balance in 6 months, and in 10 months on purchases over £1000 and pay no interest whatsoever. If you settle part of your loan in the deferral period you won’t pay interest on that part. You can still pay off the loan sooner if you make additional payments. If you’d rather spread the cost over 36 months, you can set up a loan repayment plan when the payment-free period comes to an end at 19.9% APR representative. 19.9% interest. A one-off settlement fee of £29 will be applied. Subject to application, financial circumstances and borrowing history. Ts&Cs apply. Richer Sounds Limited acts as a credit broker and not the lender. Barclays Partner Finance acts as the lender. Click for eligibility criteria or to Find out more.