CTP dBbox2 Audio Tester
CTP dBbox2 Protective Carry Case
CTP dBbox2 Power Supply – CTPPSU
CTP dBbox2 Audio Tester
CTP dBbox2 Protective Carry Case
CTP dBbox2 Power Supply – CTPPSU

CTP dBbox2 Audio Tester


£354.00£390.00inc VAT

  • CTP dBbox2 – Monitor mono or stereo line level analogue inputs
  • Monitor microphone level analogue inputs
  • Monitor AES/EBU balanced or unbalanced inputs
  • Analyse AES sample rate, status and data errors.
  • Buy a dBbox2 and get a FREE PSU and Case!

Delivery Times May Vary - Please Call

Clear selection

CTP dBbox2 Audio Tester

The CTP dBbox2 Audio Tester is now supplied with version 2 firmware CTP present the second incarnation of the essential equipment for the sound and audio installation engineer. The CTP dBbox2 allows monitoring, metering and generation of analogue, AES/EBU and SPDIF audio from a pocket sized box.

What you can do with the dBbox2:

  • Monitor mono or stereo line level analogue inputs using the built in speaker or 1/4 inch or 3.5mm headphones. Meter using either PPM or VU scale also with stereo phase meter.
  • Monitor microphone level analogue inputs, with or without 48v phantom power, using the built in speaker or headphones. Meter using either PPM or VU meter scale with stereo phase meter.
  • Monitor AES/EBU balanced or unbalanced inputs using the built in speaker or headphones. Meter using
  • 18dBFS, -20dBFS, PPM or VU scale with stereo phase meter.
  • Analyse AES sample rate, status and data errors.
  • Generate steady tone, tone sweep, GLITS, EBU, left only, right only, on both analogue and AES/EBU outputs. Tone frequency may be adjusted in third octave steps. Adjust Tone level from +10 to -60dBu in 1dB steps.
  • Use the built in microphone to talk to analogue or AES/EBU outputs.
  • Generate pink noise and send to left/right/both outputs in both analogue and AES/EBU with a choice of levels in 1dB steps from +10dBu to -60dBu.
  • Use the built in microphone to talk to AES outputs with a choice of levels and with a built in limiter.
  • Send an external mic to analogue and AES outputs with gain adjust and phantom power.
  • Phantom power test with voltage read out. Also useful for checking 2 wire talkback power and channel.
  • MIDI receiver identifying channel, note on/off and note number.
  • MIDI transmitter with a choice of note, channel and velocity, note on and note off.
  • Analyse incoming MIDI signals with pass through.
  • Use the dBbox2 as an analogue to digital or a digital to analogue converter with adjustable gain in 1dB steps, a limiter and HF, LF and Mid range equalisation.
  • Mono or stereo microphone amplifier with 48v phantom power and analogue, AES/EBU or SPDIF output. Also with adjustable gain in 1dB steps, a limiter and HF, LF and Mid range equalisation.
  • Four wire box using the built in microphone and speaker or headphones.
  • Monitor and meter 2 wire channels.
  • Test XLR, BNC and MIDI cables.
  • Output tone and monitor incoming audio simultaneously using Analogue or AES inputs and outputs. Particularly useful for frequency response and performance tests.
  • Intelligent power control to extend battery life. The dBbox2 automatically switches off all electronics not required for the current task. A dynamic battery level indicator shows if you have enough battery power for a selected function.
  • Switchable backlight.
  • Update firmware online using the dBbox2 USB port via CTP Systems web site.
  • External power input via a standard mini usb.
  • Protective case available with belt mount.


The dBbox2 includes a simple five key menu interface to make any test as simple as possible.

The case has been formed using purpose designed aluminium extrusion then machined and painted to give the unit it’s very individual look.

The architecture of the dBbox2 is based around a powerful digital signal processor and a separate microcontroller allowing them to add many more features in the future with just a firmware download from the website.

For the future CTP are also working on software to allow the dBbox2 to be used as a ‘test hub’ allowing it to be controlled by both PC and Mac software with test sequences and results available on the computer screen.

The SPDIF functions are available on the input and output BNC connectors.

The dBbox2 takes a PP3 size battery, alkaline battery highly recommended. Battery life is around 8 hours continuous but very much depends on the function selected. With phantom power selected, a fair bit less!

CTP also offer a soft case for the unit and a universal mains adaptor.

Dimensions: 146mm tall, 89mm wide, 48mm deep.

For further information please visit the CTP dBbox2 page.


All orders are delivered via next day tracked carrier. When placing an order please provide a suitable e-mail address and mobile number.

On despatch you will receive a notification from our carriers DPD along with updates right up to the point of delivery.

On the day of delivery you will get an accurate 1 hour time window for the items arrival.

You’ll even be able to contact your driver and track his progress!

Track your parcel here: DPD Tracking

Delivery Rates

We deliver Worldwide!

*Please note, FREE SHIPPING applies to Mainland UK addresses only.

Can’t see your country in the list below? Don’t worry, let us know and we’ll add it!

Country Delivery Cost Ex vat
UK Mainland (orders under £400 ex vat)  £6.66 – Next Day Courier
UK Mainland £2.46 – Royal Mail 2-3 Days
UK Mainland Saturday Shipping £13
Austria £20
Belgium £15
Bosnia £65
Bulgaria £35
Croatia £30
Czech Republic £25
Denmark £20
Estonia £30
Finland £30
France £15
Germany £15
Greece £35
Hungary £30
Iceland £65
Italy £25
Jersey £25
Latvia £35
Lithuania £35
Luxembourg £15
Netherlands £15
Norway £65
Poland £30
Portugal £30
Republic of Ireland £25
Romania £35
Serbia £65
Slovakia £25
Slovenia £25
Spain £25
Sweden £65
Switzerland £50

Returns Policy:

Not happy with your purchase?
Don’t worry, you can return goods ordered from us at any time within 14 working days of receipt for a full refund or for an exchange for a different product. Before returning any items, notify us so we know what to expect.
All we ask is that you return the items to us in the same condition that we supplied them to you. Please package the items up securely and safely so that they are not damaged during transit. Uuse the original delivery packaging where possible.

We strongly recommend using a recorded or tracked delivery service. Please send the return items to:
Returns, Raycom Ltd, Unit 8 Abbey Court Lane, Abbey Lane, Evesham, WR11 4BY

Returns Terms & Conditions:

Returns of an order for a refund or an exchange:

  • Cost of return – The costs of returning goods to Raycom shall be borne by you, the customer, in all circumstances without exception, unless otherwise agreed upon with Raycom.
  • Loss & damage – Return items must be packed suitably and insured against the event of loss in transit. Raycom Ltd will not be responsible for lost or damaged returned goods. Lost or damaged goods may effect the level of refund on equipment.
  • Delivery costs – The original postage and packaging costs will not be refunded under any circumstances unless agreed with Raycom Ltd
  • Upon receipt of the goods, to Raycom Ltd, and with prior arrangement, we will give you a full refund of the amount paid or an exchange credit as required and agreed

The right to return goods to us will not apply in the following circumstances:

  • in the event that the product has been used, in any way, shape or form, other than limited useage when the goods are unpacked
  • in the case of software, audio or visual products, where the packaging has been unsealed, broken or is incomplete
  • to any products that we have made on special order and or customised specifically for you

The provisions of this clause do not affect your statutory rights. For more information, please see our Terms & Conditions, or should you have a question regarding this policy, please do get in touch.

Cancelling an order:

In accordance with the distance selling regulations, any order with us can be cancelled before we have dispatched your items. In this instance we will refund you in full using the chosen payment method. Terms for our cancellation and returns policy.

If you wish to cancel your order:

  • Notify us by email sales@raycom.co.uk before we have dispatched the goods to you, or
  • where goods have already been dispatched to you, by returning goods to us in accordance with our returns policy
Specifications Analogue and AES/SPDIF combined

Input metering
Ref. 0dBu

Accurate to within +-0.2dB or one display segment
25Hz – 20kHz 

Accurate to within +1dB or one display segment.
 50Hz – 20kHz

Output levels
Ref. 0dBu 

Accurate to within +-0.2dB   50Hz – 15kHz

Accurate to within +-0.4dB   50Hz – 20kHz

Normally within +-0.1dB at 1kHz.

Phantom power measurement +- 1 volt.

dBbox2 Manual

You may also like…

Sennheiser HD 25 Headphones

£129.00 inc VAT (£107.50 exc VAT)inc VAT

CTP dBbox2 Protective Carry Case

£18.00 inc VAT (£15.00 exc VAT)inc VAT

CTP dBbox2 Power Supply – CTPPSU

£18.00 inc VAT (£15.00 exc VAT)inc VAT