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Adastra UM90 Compact Bluetooth Amplifier (90W/100V) Fog Siren Alert 24Vdc
  • Adastra UM90 Compact Bluetooth Amplifier (90W/100V) Fog Siren Alert 24Vdc
  • Adastra UM90 Compact Bluetooth Amplifier (90W/100V) Fog Siren Alert 24Vdc
  • Adastra UM90 Compact Bluetooth Amplifier (90W/100V) Fog Siren Alert 24Vdc

Adastra UM90 Compact Bluetooth Amplifier (90W/100V) Fog Siren Alert 24Vdc

Code: 953.179
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  • Suitable for fixed and mobile PA applications
  • Efficient Class-D amplifier design
  • Ultra-compact form factor
  • Internal USB/FM/BT audio player
  • Microphone input
  • 240V or 24V power operation
  • 100V line or 8 Ohms operation
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RRP: £199.00 (inc. VAT)
Save: 14%
Your Price: £171.00 (inc. VAT)
Item in Stock  |  Usually dispatched within 24 hours
  • Delivery Information
  • Standard Delivery - (FREE UK Delivery)
  • Express Delivery Available
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The Adastra UM90 is an ultra-compact 90W 100V Line mixer-amplifier designed to offer high-quality, dependable service for mobile and installed public address systems.

The Adastra UM90 is capable of music playback and features a built-in USB audio player, FM radio tuner and a BT wireless receiver, as well as RCA phono input and front-facing AUX input allowing connection of an external media player such as a laptop, TV or CD player.

Located on the front of the Adastra UM30 mixer-amp is a dedicated microphone input (1/4" Jack) with gain control. 

The Adastra UM90 is suitable for both fixed and mobile PA applications and can be powered via mains lead or 24V battery, such as a car or boat battery.

The Adastra UM30 can be used as either a 100V Line amplifier or standard low-impedance power amplifier.

Two UM series amplifiers can be linked together and installed into a 19" rack using the supplied rack accessories. The rack mounting accessories can also be attached so that the amplifier can be mounted against a wall or under a counter or work surface.

Power supply: 170-264Vac, 50Hz (IEC)

Amplifier : construction: Class D + transformer output

Audio source: Internal USB/FM/BT player

Inputs: 1 x mic (6.3mm), 1 x line (2 x RCA), 1 x aux (3.5mm)

Line output: 2 x RCA (mono)

Speaker outputs: Screw terminals - 100V / 8 Ohms / Com

DC power: 24Vdc screw terminals

Mute: 24V relay contacts

THD: <0.4% @ 1kHz

Input impedance: 1k Ohms (mic/line)

Input sensitivity: -10dB (line), -45dB (mic)

SNR: 80dB (line), 75dB (mic)

Frequency response: 100Hz - 18kHz

Output power : rms: 90W

Alarm output: Fog, siren & alert generator

Dimensions: 300 x 210 x 44mm

Weight: 3.02kg

Adastra UM90 Compact Bluetooth Amplifier (90W/100V) Fog Siren Alert 24Vdc

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Digital Downloads (buying software)

All software marked as "serial download" or "digital download" will be delivered via email within normal office hours.

Simply add the software to the basket and at the delivery stage in the checkout please select "Digital Download - Software by email" as your delivery method

Delivery Charges (Main Products)

The cutoff for same-day dispatch is 3:30pm but can vary at busier times such as Christmas.

All orders over £39.00 will be delivered free via our standard delivery 2-3 days (UK Mainland)

If you need your item faster we also offer a Priority Tracked service at £3.99 (1-2 days) or Next Day Tracked £6.99

(please ensure you add a mobile number to your order for tracking)

Saturday delivery is available when ordered before 2pm (Mon-Fri)

All orders below £39.00 will start as low as £2.99 depending upon weight and qty(s) (UK Mainland) 

All Delivery options will be available at the delivery stage in the checkout

EU Delivery Times

Non UK Mainland Addresses please allow 1-3 Days
Delivery To Belgium / France / Germany please allow 3-4 Days
Music PC Systems - Please allow 5-7 Working Days build time (UK) 7-14 (Rest of the World)

French - Pour la Livraison s'il vous plaît permet en France 2-4 Jours
German - Für Lieferung Nach Deutschland erlaubt bitte 2-4 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 369898 (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 369898 or email us at