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Presonus Eris MTM E66 Studio Monitor
  • Presonus Eris MTM E66 Studio Monitor
  • Presonus Eris MTM E66 Studio Monitor

Presonus Eris MTM E66 Studio Monitor

Code: ERIS-E66
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  • Dual 6.5 inch custom woven Kevlar low frequency drivers produce dynamic bass output
  • 1.25 inch silk dome high frequency driver ensures smooth high frequency performance
  • Can be used horizontally or vertically -whichever works best for you
  • The two smaller woofers work in parallel to partially contain the dispersion of the tweeter, minimizing phase displacement. The result is incredibly detailed stereo imaging
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RRP: £279.00 (inc. VAT)
Save: 11%
Your Price: £249.00 (inc. VAT)
Item in Stock  |   Express Delivery
  • Delivery Information
  • Express Delivery - £4.99
  • Standard Delivery - FREE
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The Eris E66 from Presonus are highly recommended by Inta Audio. They deliver an expanded and highly accurate frequency response and the widest stereo field available in their class. Their nested Midwoofer-Tweeter-Midwoofer (MTM, also known as "D'Appolito") configuration offers improved off-axis response and spatial resolution. The result is a more consistent listening experience, smoother frequency response, and an ultra-wide, detailed stereo soundstage.


Conventional 2-way designs can cause significant early reflections from their surrounding environment. The E44 and E66 overcome this by positioning a 1.25-inch, silk dome high-frequency driver between two 6.5-inch (E66) midrange drivers. The two smaller woofers work in parallel to partially contain the dispersion of the tweeter, minimizing phase displacement. The result is incredibly detailed stereo imaging.



Seeing Double


Both the E44 and the E66 feature two mid range drivers that cover the same frequency range. The drivers are placed so that their acoustic centers are less than one wavelength apart for any of the frequencies they reproduce; as a result, the combined signal of both drivers propagates forward like a single waveform. This makes the comparatively small mid range drivers in the E44 and E66 behave like a single, larger driver. This mutual coupling provides a highly dynamic output in a compact footprint. 


Consistent Listening

Sound waves radiating from the two components in a conventional speaker design can interfere with one another, creating peaks at some frequencies and dips at others, and these will vary depending on where the listener is relative to the speaker. In an MTM configuration, component interference, and the sonic inconsistencies that go with it, are minimized. This affords listeners an ultra-wide sweet spot and a more consistent listening experience on- and off-axis.





Presonus Eris E66 Main Features

Components and construction


  • Dual 4.5-inch/6.5-inch, custom-woven Kevlar® LF/midrange drivers produce dynamic, size-defying bass output
  • 1.25-inch, silk-dome HF driver ensures smooth high-frequency performance that is never fatiguing to the ears
  • Balanced XLR, balanced ¼-inch TRS, and unbalanced RCA inputs provide flexibility for seamless integration into any environment

User controls


  • Acoustic tuning controls help to compensate for room anomalies, providing a consistent frequency response customized for your mix environment
  • Continuously variable HF and MF controls (-6 to +6 dB) 
  • Low-cut filter (flat, 80 Hz, 100 Hz)
  • Acoustic Space settings (Flat, -2 dB, -4 dB) compensates for room placement


Power and safety


  • 90W/140W Class A/B bi-amplification for an open, clear sound
  • RF interference, output-current limiting, over-temperature, and subsonic filter protection
  • Amplifier “soft start” feature eliminates popping on power-up
  • Internal power supply with IEC connector

Powered: Yes

Power Configuration: Bi-amped

Speaker Size: 2 x 6.5"

LF Driver Size: 2 x 6.5"

LF Driver Material: Kevlar

HF Driver Size: 1.25"

HF Driver Material: Silk dome

Total Power: 140W

Enclosure Type: Ported

Input Types: 1 x XLR, 1 x TRS, 1 x RCA

Manufacturer Part Number: Eris66

Presonus Eris MTM E66 Studio Monitor

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Delivery Charges
Please note free delivery cannot be used in conjunction with any other offer, for example discount codes.
Normal Charges are:
All orders over £20.00 (excluding PC systems) will be delivered free (UK Mainland)
All orders below £20.00 will start as low as £2.49 depending upon weight and qty(s)
Typically most items such as an Audio Interface or a Microphone would cost £5.49. (UK Mainland)
Delivery of PC Systems is £19.99. (This includes Insurance and Packing Materials)

Delivery Times
UK Mainland 1-2 Days
Non UK Mainland Addresses please allow 1-3 Days
Delivery To Belgium / France / Germany please allow 2-3 Days
Music PC Systems - Please allow 5- 7 Working Days (UK) 7-14 (Rest of the World)

French - Pour la Livraison s'il vous plaît permet en France 2-3 Jours
German - Für Lieferung Nach Deutschland erlaubt bitte 2-3 Tage

Delivery Notes
On delivery you must inspect the goods carefully for damage as Inta Audio is unable to accept responsibility for damage in transit, shortage of delivery or loss of products unless the customer advises Inta Audio of such within three working days from the date of delivery.


Returns Policy

We ask that you follow these guidelines to help us process your return as quickly and efficiently as possible:

1. Please keep your order reference to hand. This confirms your original order and gives us the necessary details to authorise the product’s return.

2. Contact our Customer Services Team on 02476 369897 (or e-mail We will then send you an RMA number and returns form which needs to be completed and sent back with the returned item(s).

3. (If the order has been unpacked) re-package it to ensure that it is being returned in its original condition. Please make sure all items relating to the product are returned, including manuals and cables.

4. When returning an item please obtain a ‘proof of postage’ receipt from the Courier.

Returned items must be mailed within 10 days of when the RMA Number has been issued. Items received with a post date 30 days after your requested return will NOT be eligible for refund.

Please note: Our returns policy is quite straightforward but there are a number of conditions that we ask our customers to comply with before applying:

1. It is your responsibility to request a return. If you don’t tell us you want to make a return, we don’t know. Once you do tell us, we will do everything we can to action it.

2. If you have not requested a return within 28 days of receiving an order, we will have assumed that you are intending to keep it and we will not authorise a return.

3. We always refund the payment according to how the original purchase was made and aim to do so within 72hrs of the return being received by us.

4. Returned goods are liable for a restocking fee of 15% towards handling and repackaging if the order is not returned in its original, unopened packaging. This charge will be subject to our inspection of the returned goods.

5. Delivery charges will not be refunded unless the delivered goods are faulty.

6. Replacement products are dispatched immediately after the returned goods have been received and accepted by Inta Audio.

7. Items that develop a fault within 30 days of delivery are eligible for a replacement or a refund. Delivery costs are also reimbursed for faulty items. Please contact our Customer Services Team on 02476 369898 if you believe your item has developed a fault.

Finally, please remember that notifying us of your intention to apply for a return, saving the delivery paperwork and keeping the order in its original packaging will help both you and Inta Audio to process the return quickly.

If you have any questions about our Returns policy please telephone us on 02476 369897 or email us at