What is the difference between balanced and unbalanced terminations?

  • Balanced terminations in relation to IEMs and Headphones refer to differential drive where instead of both L/R signals sharing a common ground, we have L+ with L- and R+ with R-. Many high end audio sources offer balanced outputs with a higher power rating.
  • Differential drive delivers an increase in audio performance due to the doubling of the amp’s voltage slew rate, lower noise, and reduced crosstalk due to the elimination of the shared audio ground between the left and right channels.
  • We recommend running our IEMs in a balanced setup where possible.


What terminations do you offer with your IEMs?

  • We offer both unbalanced 3.5mm terminations as well as 4.4mm balanced termination. Please choose whichever one fits your needs.

  • 2.5mm balanced terminations are also available, on request.

  • Models with OE plug terminations come with both 3.5mm and 4.4mm heads. 2.5mm heads can be bought directly from OE. 

My IEMs do not have much bass, what is going on?

  • Typically, this is due to fit issues as the eartip does not form a full and complete seal within your ear canal.

    Gently press the earphones deeper into your ear and see if you hear more bass. Try tilting the earphones at different angles and/or swap to a larger/smaller eartip size. With a good fit, you should perceive environmental sounds around you as muffled.

    For an optimal listening experience, it is crucial to use correctly sized eartips with our IEMs. An incomplete seal will result in a suboptimal listening experience. 

    Symphonium Audio IEMs are designed with a deep fit in mind for the best audio experience. 

My Symphonium IEMs do not sound as good as when I first got them. What should I do?

  • Usually, this is due to earwax build up on the mesh filters. Please view our guide here on how to maintain your Symphonium IEMs. It will not take more than 5 minutes!

    If you cannot get rid of the earwax buildup, kindly contact us and we will assess the damage.

I accidentally damaged my Symphonium Audio IEMs. What should I do?

  • Please contact us at info@symphoniumaudio.com or use our contact form here. We will assess the cost of repair on a case-by-case basis.

What is ‘FLAT’ technology?

  • The ‘FLAT’ technology is a proprietary circuitry designed in collaboration with our partner company Subtonic. The circuitry will eliminate any impedance mismatch which allows our earphones to retain their sound signature with the use of any source. Tube amp or mobile phone, our IEMs will sound consistent and excellent.

What are Balanced Armatures?

  • Balanced armature drivers use an electronic signal to vibrate a tiny reed that is balanced between two magnets inside a tiny enclosure. The motion of the reed is transferred to a very stiff aluminum diaphragm. This diaphragm is free of unwanted resonances in the audio band, allowing it to produce excellent clarity.

    Balanced armature drivers are incredibly small. This leaves more room for other components or a larger battery inside hearable devices, and can allow multiple drivers to be combined to get the best sound and performance from in-ear monitors or wireless earphones.

Do you offer custom-fit IEMs?

  • As of now, we do not offer a custom-fit service. 

Are Symphonium Audio IEMs good for gaming?

  • Yes! You’ll be able to immerse yourself in the game better. As our IEMs are designed to reproduce the accurate imagery in music, it directly translates into a good gaming experience. 

    High quality IEMs do wonders for gaming as they can properly represent the correct spatial imagery. FPS games will feel more lifelike and you will be able to hear the directionality of each sound effect. Moreover, all game types will also benefit from the increased resolution and clear reproduction in sound, making for an enjoyable and immersive gaming experience.

Do you sell wireless IEMs?

  • Unfortunately not at the moment. However, there are wireless high-res solutions available in the market such as our partner’s iFi Audio Go Pods that can transform our wired IEMs into wireless for listening on-the-go. Do check them out!


How do I know which model is right for me?
  • We offer IEMs with different sound signatures and at different price points to cater to different types of listeners. Each product page has a description of the sound signature that should help you get an idea of the sound and design philosophy of each model.
  • Feel free to start a conversation with us at info@symphoniumaudio.com or use our contact form here if you have additional questions about our products. We will be delighted to assist you further.

How long is your build time for IEMs out of stock?

  • Our current build time is 3-14 days.

Can I test your IEMs before purchase?

  • You can demo our IEMs at any of our distributors with a physical store. A list of them can be found here: Retailers
Where are your products made? Are they all made in-house?

  • Yes, all Symphonium Audio products are all proudly designed and manufactured in Singapore with each pair handmade and tested to rigorous standards. Each IEM also comes with the Symphonium quality promise that ensures each set is made to the highest quality.

What is the warranty on my product?

What are your terms and conditions?


What is the Symphonium quality promise?

  • The Symphonium quality promise ensures the highest level of quality and attention to detail. Great care is taken in each step of the manufacturing process, resulting in an exceptional product that will please both discerning and casual listeners alike.


Shipping & Returns

Which shipping service do you use?

  • We offer complementary DHL shipping for any purchase of Symphonium Audio products above $899*. All other purchases will be fufilled with our national post, Singpost, using tracked shipping.

    For more information, please view our page on shipping here.


         *Not applicable for discounted items 

    What is your return policy?

    • Our IEMs can be returned to us within 30 days with a 25% restocking fee.  Customers are responsible for return product shipping costs. Refunds does not include initial shipping cost, if any.

    Cancellations and Refunds

    • For all payment methods, there will be a 10% cancellation fee.

      We understand that sometimes life happens and an order needs to be cancelled, but we pay a non-refundable payment processing fee, as well as currency conversion fees on each transaction.
    • For orders that have been shipped, a shipping cost will be charged, before the refund is processed.

    • Sales are final on the following products:
      - B-Stock & Open Box
      - Eartips (Due to hygine purposes)
      - Cables & Adapters

    Tax Charges

    • All prices on our website do not include tax. Tax may be be changed by your local customs and will be the responsibility of the customer.

    • In the event that a customer is unwilling to pay their customs tax and fees, it will be returned to us by their country. Any shipping costs will be on the burden of the customer. If the customer received free shipping, the shipping cost for both trips will be deducted from their refunded amount.