Sony CMT-S20B review
Test scoreShow Context
- Separate speakers

The Sony CMT-S20B micro hi-fi system includes CD player, DAB and FM radio. You can connect an iPod or iPhone via the aux input, or other devices using the USB port. Our Which? tests reveal that you can't turn it up very loud without causing distortion, making it only suitable for smaller rooms. But what about its ultimate audio quality - is it pleasant to listen to? Our expert listening panel delivers its verdict.
What's included:- Pros and cons
- February 2016 update
- What is it?
- What does it sound like?
- What's it like to use?
- Is there anything I should watch out for?
- Is there anything else I should know?
- Should I buy it?
Last checked by Which?
January 2022
First reviewed by Which?
September 2013
Released
January 2013

Technical specifications
General
- Single hi-fi unit
- CD player
- Height (main unit)13.3cm
- Width (main unit)17cm
- Depth (main unit)23.5cm
- Height (speakers)24cm
- Width (speakers)14.8cm
- Depth (speakers)12.7cm
The overall Which? test score is made up of the following star ratings, all determined by our rigorous lab tests.
Find out how we test mini hi-fi systemsPut us to the test
Our Test Labs compare features and prices on a range of products. Try Which? to unlock our reviews. You'll instantly be able to compare our test scores, so you can make sure you don't get stuck with a Don't Buy.
Compare retailers
Prices updated dailyPrices are ordered from lowest to highest, irrespective of retailer rating or stock, and exclude any potential delivery costs. We are not able to show every possible retailer and cheaper prices may be available. When you click on a retailer link on our site, we may earn affiliate commission. This supports our not-for-profit mission to empower consumers and in no way affects our recommendations. Find out more.
- 40%Lowest score
- 59%Average score
- 73%Highest score
Put us to the test
Our Test Labs compare features and prices on a range of products. Try Which? to unlock our reviews. You'll instantly be able to compare our test scores, so you can make sure you don't get stuck with a Don't Buy.
Suggested alternatives
Related articles
How to buy the best mini hi-fi system
Need advice on buying the best mini hi-fi system? This expert guide gives you all the info, like choosing between an all-in-one or separate speaker mini hi-fi, and features like a CD player, wi-fi, radio and headphone socket.
How we test mini hi-fis
Which? puts mini hi-fis through their paces, so you can be assured of getting the best mini hi-fi and ensure you avoid a Don't Buy.
Top five best mini hi-fi systems for 2022
We list our top five mini hi-fi systems from our expert testing. All are great-sounding Best Buy mini hi-fis. We also outline the features they offer, such as a CD player, radio, wi-fi, aux-in, line-in and headphone socket.